China Safety Science Journal

Research on PSB as a function of work stress, job resources and PSC

LI Yan, ZHANG Yan

2019, 29(1): 1-6. doi:10.16265/j.cnki.issn1003-3033.2019.01.001

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On the basis of the JD-R model, a conceptual model was built for relationships between PSB and work stress, job resources and PSC, with PSC used as the moderating variable. Effectiveness of the model was assessed by means of questionnaires, SEM and regression analysis. And the results indicate that there is a significantly negatively correlation between PSB and work stress, that there is a significantly positively correlation between PSB and both job resources and PSC , and that PSC plays a buffer role, moderating the relationship between work stress and PSB.

Integration between artificial intelligence technologies for miners' unsafe behavior identification

TONG Ruipeng, ZHANG Yanwei

2019, 29(1): 7-12. doi:10.16265/j.cnki.issn1003-3033.2019.01.002

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A fusion method, for identifying unsafe behavior of miners, was worked out as a result of integration between three existing artificial intelligence identification methods including the computer vision based on depth learning, depth image representing depth information and wearable sensor. The method uses PCA to reduce the dimensions of the behavior features extracted by the three recognition techniques, and classifies the features by support vector machine (SVM). Data on miners' fall behavior were used as positive samples and data on five kinds of daily behavior including walking, sitting down, bending, squatting and lying down were used as negative samples. Three artificial intelligence identification methods and the fusion method were applied to identify the fall behavior of miners. The results show that the effectiveness of the fusion method in recognizing unsafe behavior is higher than that of the three artificial intelligence methods.

Study on relationships between driving behavior of private car drivers and their personality traits

LIU Lingli, TIAN Dongdong, WANG Ziyue

2019, 29(1): 13-18. doi:10.16265/j.cnki.issn1003-3033.2019.01.003

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For the sake of studying the relationships between unsafe driving behavior and personality traits of private car drivers, a model of the relationships between unsafe driving behavior and personality traits of private car drivers was built. Personality traits were measured by the big five personality theory, and unsafe driving behavior was divided into three categories (violations, lapses, cognitive errors). The data were collected by questionnaires and the model was verified by SEM. The result shows that extraversion has a positive relationship with violations (path coefficient 0.180), both agreeableness and conscientiousness have a negative relationship with violations (path coefficient -0.962 and -0.544), neuroticism has a positive relationship with lapses and cognitive errors (path coefficient 0.417 and 0.409), and openness has no significant relationship with violations.

SD-MOP model for preventing prefabricated construction safety accidents

CHEN Wei, QIAO Zhi, XIONG Fugang, NIU Li, YANG Daohe

2019, 29(1): 19-24. doi:10.16265/j.cnki.issn1003-3033.2019.01.004

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In order to effectively prevent prefabricated construction safety accidents and solve the problem of multi-objective dynamic equilibrium optimization about safety,schedule and cost,the SD method was used to establish a prefabricated construction safety accident response causal relation diagram across prefabricated building construction based on the depth analysis of factors causing construction safety accidents and interaction mechanism between them. The sensitivity analysis and MOP methods were applied to build an SD-MOP integrated model to explore the key accident response safety input factors and establish and analyze their optimal resource input allocation schemes. A sample project was used to carry out the empirical analysis. The result shows that the most effective way to achieve a multi-objective equilibrium between safety,schedule and cost is to improve level of component lifting technology,and then to strengthen intensity of component inspection before leaving factory,enhance the performance of component safety identification technology and rationally plan frequency of using the component special transport vehicles.

A study on movement form of and injury to male pedestrian in SUV crash

ZHANG Peng, ZHANG Daowen, XIAO Lingyun, PENG Yijun, YANG Ling

2019, 29(1): 25-30. doi:10.16265/j.cnki.issn1003-3033.2019.01.005

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In order to reduce the damage to male pedestrian in pedestrian-SUV collision accident, the Hybrid III 50^th dummy was taken as the reference model, four types of male pedestrian model of our country with height of 168.5 cm and weight of 50.5 kg, 65.5 kg, 75.5 kg and 80.5 kg were established by scaling, a front collision model of different types of male pedestrian-SUV with different collision speeds and maximum braking deceleration was built by using MADYMO, then computer simulation tests were carried out, to study the movement form and head injury of male pedestrian after the collision. The research shows that the collision speed determines the movement pattern of pedestrian after the collision, that the collision speed has a great influence on the source of male pedestrian head injury, that when the collision speed is 30-80 km/h, male pedestrian head injury is mainly caused by the collision with the ground, when the collision speed is greater than 90 km/h, male pedestrian head injury is mainly caused by collision with SUV, that the bigger the human body type is, the smaller the HIC value of the head caused by the collision with the SUV will be, and that the larger the maximum braking deceleration, the smaller the HIC value of the head caused by the collision between the male pedestrian and the SUV and the later the collision between the head and the SUV will be.

Study on flame-retardant properties of gypsum based self-leveling decorative fire-resistant polystyrene board

YU Shuijun, WEI Yuebei, YANG Dailin, XIE Gaochao

2019, 29(1): 31-36. doi:10.16265/j.cnki.issn1003-3033.2019.01.006

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To solve the problem of rapid propagation of fire and the production of toxic smoke in building exterior insulation system, a kind of self-leveling mortar was made by using magnesium hydroxide as an inorganic flame retardant and polycarboxylic acid water reducer as admixture. The effect of the self-leveling mortar coated on the surface of EPS on flame-retardant properties of fire-resistant polystyrene board was studied by carrying out orthogonal test. The results show that the amount of water reducing agent can change the thickness of mortar cover by affecting the fluidity of self-leveling mortar, which is the main factor affecting the results of oxygen index (LOI) test, that among the four factors, the effect of Mg(OH)₂ content on peak heat release rate (pk-HRR), total heat release (THR) rate and ignition time (TTI) is especially obvious, that the replacement rate of fly ash is the main factor affecting the smoke density grade, that the best proportioning of gypsum based self-leveling mortar with good flame retardance is that water binder ratio is 0.30, fly ash substitution rate is 30%, water reducing agent content is 0.2% , magnesium hydroxide content is 12%, and that the flame retardant and smoke suppression effects of EPS boards can be significantly improved by flame retardant treatment.

Cause analysis and prevention of spontaneous combustion in deep coal seam drilling

QI Qingjie, ZHAO Youxin, JIA Xinlei, ZHOU Xinhua

2019, 29(1): 37-42. doi:10.16265/j.cnki.issn1003-3033.2019.01.007

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To avoid spontaneous combustion of extraction boreholes in deep coal seam, the drilling of 24100 working face of Pingmei No. 10 coal mine was taken as the research object, the causes of spontaneous combustion of extraction boreholes were studied by means of theoretical calculation and numerical simulation. The radii of both fracture zone and plastic zone around the plugging section of the extraction borehole were determined by means of theoretical analysis. Based on the numerical simulation method, the sealing depth and suction negative pressure of the gas drainage hole of 24100 working face were optimized according to the minimum wind speed of spontaneous combustion of coal. The results were verified with the engineering experiment in 24100 working face. The results show that the radius of plastic zone around the plugging section of borehole is 0.22 m, which provides a leak passage for the extraction borehole, and that the optimum sealing depth of the extraction borehole in 24100 working face is 17 m and the negative pressure of the extraction is 25 kPa, which can prevent the spontaneous combustion of the extraction borehole.

Research on multi-sensor smoke detection method foraircraft cargo compartment

HE Yongbo, ZHANG Wenjie, YANG Wei, LI Yongqing

2019, 29(1): 43-48. doi:10.16265/j.cnki.issn1003-3033.2019.01.008

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In order to solve the problem of the high false alarm rates of the aircraft cargo compartment fire detectors caused by the dust and water vapor particles in the air, a multi-sensor composite aircraft cargo compartment fire detection method was worked out. Firstly, a composite fire detection device was built, including a temperature sensor, a CO sensor and a dual-wavelength photoelectric smoke sensor. A fire detection system software was designed. Then a large number of true and false fire source experiments were carried out to collect data on the parameter variation features of smoke, temperature and gas during the fire. Finally, the artificial neural network algorithm was used to perform fusion analysis of the collected data. The experimental data show that the alarm accuracy of the multi-sensor detection device embedded with dual-wavelength photoelectric smoke detector is significantly higher than that of traditional fire smoke detectors, and the relative error of interference source identification does not exceed 5.7%.

Study on a system for rapid detection of flame in tank

DONG Zhe, ZHAO Linshuang, CHEN Dengbo

2019, 29(1): 49-54. doi:10.16265/j.cnki.issn1003-3033.2019.01.009

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In order to fill the gap in the research on the rapid flame detection systems for storage tanks, a composite tank flame detector based on ultraviolet and infrared was developed and modes were studied for arranging the detectors on the top of the tank. The flame propagation characteristics of alcohol and n-heptane were studied experimentally. The detector's performance parameters were determined according to the data on the flame spread speed obtained in the experiments. Modes for arranging the detectors in storage tanks were designed in terms of detecting angle, detecting distance and dimensions of tanks. The results show that the flame propagation speeds of alcohol and n-heptane are 2.2-2.4 m/s and 1.5-1.7 m/s respectively at normal temperature and pressure, and the flame propagation speeds are not affected by the oil pool scale and the liquid layer thickness, and the detector's performance parameters meet the requirements of tank fire rapid detection, and the four modes of arrangement are efficient and reliable.

Study on movement characteristics of dust raised by weak shock wave in horizontal pipeline

ZHANG Xiaoliang, YE Shengjun, LIU Xiaochen, LI Hao, YANG Luying

2019, 29(1): 55-61. doi:10.16265/j.cnki.issn1003-3033.2019.01.010

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In view of that in the mechanical processing industry, the deposited dust in the horizontal pipeline often cause huge losses to people's lives and property through explosion resulting from the dust raised secondarily, movement characteristics of dust raised in horizontal pipeline were studied experimentally by using common aluminum alloy dust as the research object, a self-designed horizontal pipeline as the test platform, and a PIV system and other equipment as the means of data acquisition. The results show that under the action of thin membrane and weak shock wave, the maximum velocity of dust increases first, then decreases and then increases with the increase of deposition, that under the action of no membrane and weak shock wave, the maximum velocity of dust decreases first and then increases with the increase of deposition, that membrane makes the maximum velocity of raised dust decrease, and that under the action of weak shock wave, the membrane can reduce the maximum velocity of secondary dust and change the flow field of dust cloud.

Experimental study on suppression of methane explosion with ultra-fine water mist containing both optimized methane oxidizing bacteria and inorganic salt

YANG Ke, ZHANG Ping, XING Zhixiang, JI Hong, ZHOU Yue, WANG Zhuang

2019, 29(1): 62-67. doi:10.16265/j.cnki.issn1003-3033.2019.01.011

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To further improve the suppression efficiency of ultra-fine water mist on methane explosion, methane-air explosion inhibition experiments were carried out by using a experiment platform. In the experiments, ultra-fine water mists containing methane-oxidizing bacteria-inorganic salts were used as the inhibitors. Three factors including the degradation time, the first spraying volume and secondary spraying volume were taken into consideration, and orthogonal experiments were carried out. The methane explosion pressure and flame propagation process under different experiment conditions were analyzed. The experimental results show that the effect of methane-oxidizing bacteria degradating methane in the modified medium is better than that in the normal medium;the degradation time has a significant influence on the maximum explosion overpressure ΔP_max of methane-air mixture, the secondary spraying volume has a certain influence on the maximum explosion overpressure ΔP_max of methane-air mixture. The degradation time has a significant influence on the average flame propagation speed,the secondary spraying volume has a certain influence on the average flame propagation speed. Simultaneous increasing both the degradation time and the secondary spraying volumecan reduce both the average pressure increasing rate and the average flame propagation speed.

LNG accident consequence QRA considering domino effect

TIAN Yuzhong, FAN Hongjun, TU Huan, LI Junrong

2019, 29(1): 68-73. doi:10.16265/j.cnki.issn1003-3033.2019.01.012

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To improve the accuracy of QRA for the consequence of LNG accidents, the influence of domino effect on the consequence was included in analysis. The personal risk created by LNG accidents was taken as the object of study.Steps in calculating personal risk include choosing a right model for the initial accident to calculate the thermal radiation and overpressure generated by it, the damage probabilities of the equipment affected and the probabilities of domino scenario occurrences, calculating the personal risk of the target point based on the probabilities of domino scenario occurrences and the human vulnerability model, and calculating the personal risk value by taking the fire and explosion accident during LNG bunkering as an example. Based on example calculations, a comparison was made between the personal risk value obtained with and without considering domino effect. The last analysis shows that the personal risk value obtained with considering domino effect is obviously higher than that without domino effect, and so the results of QRA on the basis of domino effect are more accurate.

Study on propagation of laminar premixed flames of syngas with CH₄ addition

SHANG Rongxue, LI Gang, ZHANG Peihong

2019, 29(1): 74-80. doi:10.16265/j.cnki.issn1003-3033.2019.01.013

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The chemical kinetics of laminar premixed flames of the coal gasification syngas varied significantly with the different volume fractions of methane. The laminar flame speeds and adiabatic flame temperatures of syngas/air mixtures with CH₄ addition (volume fraction 0-70%) in the fuels were numerically studied at 300 K using GRI 3.0-Mech. To investigate the chemical kinetics effect of CH₄ on laminar premixed flame, the sensitivities of mass burning rate of mixtures with various CH₄ addition ratios and the mole fractions of vital radicals were calculated. The numerical results show that laminar flame speed, adiabatic flame temperature and equivalence ration at the peak laminar flame speed are decreased nonlinearly with the increase of CH₄ volume fraction, that when the volume fraction of CH₄ in the fuels is not higher than 30%, the laminar flame speed decreases rapidly due to the significant reductions of H radicals for rich mixtures, and that with the further increase of CH₄ volume fraction in the mixtures, the major decline of laminar flame speed is suppressed due to the deficient of OH radicals and reduction of CH₃ radicals.

Suppression of methane-air mixtures explosion flame propagation using aluminum-magnesium alloy-based foam composite

XU Haishun, GAO Linjie, SU Deng

2019, 29(1): 81-86. doi:10.16265/j.cnki.issn1003-3033.2019.01.014

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For the sake of exploring the explosion suppression efficiency of aluminum-magnesium alloy-based foam composite, explosion suppression experiments were conducted by using an explosion chamber with 80 mm×80 mm in cross-section, and 900 mm in length. The influences of the filling density on the flame propagation speed, pressure and flame front morphology were observed. The results show that when the filling density is 10 kg/m³, flame propagation is weakly enhanced by aluminum-magnesium,that when the filling density exceeds 20 kg/m³, the effect of this material on flame propagation is transformed into suppression, that the time for the flame propagation velocity to reach the first peak and that for the explosion pressure to reach the rupture pressure are further extended with the increase of filling density, that when the filling density is 40 kg/m³, the explosive flame propagation is completely suppressed. Affected by the filling material, the flame front morphology changes from laminar flame to turbulent "hourglass" flame after passing through the filling area. The mechanism of explosion suppression of the material is mainly reflected in both turbulence promotion and cooling inhibition.

Analysis of internal and external factors affecting college mass incidents

AN Yu, WEI Yanbin, LI Jianfei, XU Surui, TONG Ruipeng

2019, 29(1): 87-92. doi:10.16265/j.cnki.issn1003-3033.2019.01.015

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In order to analyze the effects of internal and external factors on college mass incidents, an SD model was built based on the SD theory. Thestudents' mass incidents in Jiujiang University was taken as an example, Vensim software was used for empirical analysis. The results show that the internal influence factors belong to the incentive factors of college mass incidents, the effects of internal factors gradually increase, and in the process of incident development, improper intervention against internal factors will trigger the incident situation, that the external factors belong to the health care factors of college mass incidents, and in the process of incident development, the reasonable intervention against external factors can largely control the development trend of the incident.

Identification of key nodes in Chengdu metro network and analysis of network performance

XUE Feng, HE Chuanlei, HUANG Qian

2019, 29(1): 93-99. doi:10.16265/j.cnki.issn1003-3033.2019.01.016

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In order to improve the accuracy of metro network performance analysis, topological structures of Chengdu metro network were studied based on complex network theory, an evaluation index system of node importance was constructed, 136 nodes were evaluated by using grey correlation and Technique for Order Preference by Similarity to an Ideal Solution (TOPSIS) method to identify key nodes. Four parameters such as network efficiency were used as network performance indicators. Trends in network performance were observed after 30 key nodes were attacked maliciously and 106 common nodes randomly. The results show that the average degree of the Chengdu metro network is 2.147, the average path length is 13.146 5 under the Space L model, the network betweenness, connectivity and efficiency are low, and the East Passenger Station (56) ranks first in 30 key nodes, and that both malicious and random attacks will make the network efficiency and the natural connectivity decrease slowly, but will make both the network connectivity and the maximal connected subgraph decrease faster.

Research on quantitative layer of protection analysis for chemical industry hazards

YAN Fang, ZHANG Shu, XU Kaili

2019, 29(1): 100-105. doi:10.16265/j.cnki.issn1003-3033.2019.01.017

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The application of LOPA, a semi-quantitative risk assessment method, in the assessment of chemical hazards is restricted. It cannot fulfill the requirement of scientific and precise evaluation for safety measures in the chemical industry. In order to make quantification of LOPA, a quantitative LOPA called the set pair analysis-layer of protection analysis (SPA-LOPA) was worked out by taking advantage of the SPA. The severity of the risk can be determined quantitatively by using the proposed method. Moreover, a concept of diversity degree (DD) was introduced to make quantitative description of the severity, and corresponding algorithm of the DD was worked out. Therefore, the risk can be calculated, and the quantitative LOPA can be achieved. A case study for the high pressure incident of a certain toluene tank was made by using SPA-LOPA. The traditional LOPA was employed to make comparison and verify the effectiveness. The results show that the quantitative LOPA for chemical hazards can be made by using the proposed method, and the quality of assessment results also can be ensured.

Study on method for identifying hazardous factors in CRES: EETD taken as an example

LI Jingsheng, ZHAO Lin, WANG Yang, MENG Liang

2019, 29(1): 106-111. doi:10.16265/j.cnki.issn1003-3033.2019.01.018

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The limitations of traditional hazard identification methods were clarified, and the STPA method of STMAP was applied to analyze the hazard event in which the CRES couldn't break the EMU, the safety problem was regarded as a control problem, the on-board earthquake emergency treatment device was taken as an example to analyze its unsafe control actions, the causes of the unsafe control actions, and it's hazardous factors were analyzed. A comparison was made between the traditional FTA method and the STPA method based on the STAMP model. The effectiveness of the STPA method in identifying hazardous factors was assessed. The results show that the effectiveness of the STPA method is greater than that of the FTAmethod, and that using the former can identify more than what using the latter can, and the difference includes but is not limited to design faults and poor communication.

Influence of proof testing strategy on Markov model based calculation of PFS

LI Peng, WANG Haiqing, TIAN Yingshuai, QIAO Danju

2019, 29(1): 112-118. doi:10.16265/j.cnki.issn1003-3033.2019.01.019

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To accurately evaluate the PFS of SIS, a new PFS calculation model was built based on the traditional Markov model, after considering a proof testing strategy of the testing coverage rate and the system safety failure caused by the testing. The model was applied to a control system of liquid level for hot high pressure separator of hydrogenation process, and values of the PFS of the control system under different proof testing strategies were calculated. The results show that the model can solve the problem of over-idealization of the PFS calculation, and compared with the ideal testing strategy, the model is more accurate for the PFS calculation of on-site SIS and provides a certain safety margin for the SIS.

Gas-geology action analysis of coal-gas outburst in complicated geological structure coal mine

GAO Kui, QIAO Guodong, LIU Jian, ZHANG Shuchuan

2019, 29(1): 119-124. doi:10.16265/j.cnki.issn1003-3033.2019.01.020

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In order to deeply understand the mechanism of coal and gas outburst accidents occurred in geological structural belts, Luling coal mine was taken as an example, the structural characteristics and gas geological characteristics of the mining area were discussed on the basis of the gas geological theory. The influence of the geological tectonic movement on coal structure and gas occurrence during the formation of the compresso-shear faults was analyzed. Research shows that Luling coal mine is located in the upper plate of the thrust fault geological structure zone, and develops the soft coal seam, compression torsion fault and layer slip structure have a significant impact on the mining area, that under the action of extrusion stress, the development of fracture zone in the area of the closed reverse fault of the compression and torsion, stress controls the migration and accumulation of gas to the fractured zone, which makes it become a high pressure gas enrichment area, that under the influence of mining and other different working, a large quantity of gas and a mixture of structural soft coal and rock in a coal seam near the compression torsion reverse fault tectonic belt are thrown out quickly at the moment of coal seam exposure, resulting in the formation of coal and gas outburst.

Rock damage creep model based on generalized Burgers model

ZHANG Liangliang, WANG Xiaojian

2019, 29(1): 125-131. doi:10.16265/j.cnki.issn1003-3033.2019.01.021

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In order to describe the nonlinear viscoplastic deformation characteristics of rock in the accelerated creep stage, firstly, an evolution equation of the damage variable with stress and time in the accelerated creep stage was derived by integrating the damage law formula proposed by Kachanov. Then,the viscous parameter in the ideal viscoplastic model was replaced by effective viscous parameter to establish the viscoplastic damage body, and it was connected with the six-element model in the generalized Burgers model to obtain a new rock damage creep model. The three-dimensional creep equation of the model was derived based on plastic mechanics and the effectiveness of the model was verified by triaxial compression creep test data on sandstone and sandy mudstone in Bojianghaizi coal mine. The results show that the theoretical curve obtained by using the damage creep model agrees well with the creep test curve, and the new damage creep model can better describe the nonlinear viscoplastic deformation characteristics of the two kinds of rock in the accelerated creep stage.

Calculation of oxygen concentration in vehicle hold on vehicle fire

FANG Min, SHEN Henggen, CHEN Hongchao, FEI Hua

2019, 29(1): 132-137. doi:10.16265/j.cnki.issn1003-3033.2019.01.022

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In order to explore the oxygen concentrations variation in vehicle hold in the case of heavy-duty diesel fire, firstly the oxygen consumption was analyzed for each type of vehicle fire. And then, based on the thermal balance, mass flow balance, and general ventilation equation, a theoretical calculation model of oxygen concentration was built for an inconstant oxygen consumption source. Finally,the model was applied to a certain landing platform dock. The results show that without smoke emission, the oxygen concentration in the vehicle hold decreases slowly in the early stage of vehicle fire, that after 200 seconds, the oxygen concentration decreases severely, that after 587 seconds the fire ceases because the volume fraction of oxygen in the vehicle hold is less than 14%, that with smoke emission and ventilation, the temperature increases obviously after 120 seconds, the temperature inside the vehicle hold reaches 100 ℃ after 240 seconds, that after 120 seconds, the oxygen concentration in the vehicle hold starts to decrease rapidly, and the oxygen concentration is lower than the threshold for human working after 270 seconds, and that the model is an effective tool for analyzing the temperature and oxygen concentration, and giving technical support for the personnel evacuation in the case of vehicle fire.

Research on nuclear power plant construction team safety climate influence mechanism

ZHANG Li, XIA Yawen, LI Pengcheng, LI Qiuxiang, LIU Jianqiao

2019, 29(1): 138-143. doi:10.16265/j.cnki.issn1003-3033.2019.01.023

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In order to improve the safety management level during nuclear power plant construction, on the basis of the achievements in related researches on construction industry safety climates and the characteristics of China's nuclear power enterprise safety management, a safety climate influence mechanism model was built by using the AMOS 20.0 software. The relationships among the five dimensions affecting the nuclear power plant construction team safety climate, project department's safety responsibility, team communication, team member safety attitude, construction site management, construction environment, were explored. The model was verified and modified. The results show that the project department's safety responsibilities have a significant impact on both construction safety management and on-site construction environment, and that construction safety management has a significant impact on both construction team staff safety attitudes and communication between personnel in the construction team.

Hydropower engineering safety accident occurrence mechanism and management strategies

FAN Qixiang, LIN Peng, WEI Pengcheng, WANG Zhilin, LIU Xianrong, YANG Jianye

2019, 29(1): 144-149. doi:10.16265/j.cnki.issn1003-3033.2019.01.024

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To prevent the safety accidents during the construction period of hydropower project, the accident occurrence mechanism and management strategies were studied. The characteristics of hidden dangers and safety accidents in hydropower projects in China were analyzed by means of data statistics, and the internal relations between the hidden danger and safety accident were illustrated, as well as the evolvement process and mechanism from the hidden danger to the safety accident. Based on the reality of the site safety control of hydropower projects in China, a new comprehensive risk control system and related specific measures were proposed for hydropower projects. The study results show that by using the flattening management method of hidden danger to control safety accidents when they make a start, the accident rate on the hydropower construction site can be reduced considerably, and the formation of the safety culture in the enterprise can be promoted effectively.

Development of chemicals hazardousness prediction technology in United States and its enlightenment

ZHANG Jinmei, GAO Yue, ZHENG Yamei

2019, 29(1): 150-154. doi:10.16265/j.cnki.issn1003-3033.2019.01.025

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In order to promote prediction of the hazardousness of a given chemical rapidly, the development of chemicals hazardousness prediction technology in the United States was studied in terms of chemical policy impact, prediction models and tools, and the gap in chemicals hazardousness prediction technology in China was discussed too. The results show that chemicals hazardousness data bases are the foundation of prediction technology, that building prediction models according to chemical hazard categories and characteristics of biological species to be evaluated, improving relevant regulations and standards of chemical prediction technology in combination with national chemical safety supervision requirements, and creating ways and means of facilitating public access to the data and prediction tools are important methods for promoting the development of chemicals hazardousness prediction technology in China.

Research on relationship between coal mine senior managers' safety leadership and leading style

LI Guangli, LIU Aiqun, DONG Ziwen

2019, 29(1): 155-160. doi:10.16265/j.cnki.issn1003-3033.2019.01.026

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The objective of the paper is to analyze the differences in safety leadership among coal mine senior managers of different leadership styles. Based on the questionnaire response of 221 miners from 6 coal mines, a raliability analysis and a validity analysis and a correlation analysis were made for the safety leadership scale and the leadership style scale by using SPSS24.0 software. The relationship between coal mine senior managers' safety leadership and leadership style was studied by using the multiple regression analysis method. Results show that senior managers' safety leadership correlates significantly with different dimensions of leading style, that the charisma, intellectual stimulation and individualized consideration of the transformational leadership style predict remarkably and positively safety accomplishment and safety guidance, that charismatic leadership and individualized consideration of the transformational leadership style predict remarkably and positively safety caring, that charismatic leadership and intellectual stimulation of the transformational leadership style predict remarkably and positively safety motivation, that charismatic leadership of the transformational leadership style predict remarkably and positively safety motivation safety controlling, and that the contingency reward and active exemplary management of the transactional leadership style predict remarkably and positively safety motivation and safety controlling.

SLP-based optimization of subway construction site safety layout

LI Wei, YANG Fuqiang

2019, 29(1): 161-166. doi:10.16265/j.cnki.issn1003-3033.2019.01.027

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To improve the safety management level of the subway construction site, a certain subway construction site was taken as an example, and SLP method was used to optimize the layout of the subway construction site. According to the functional division, the subway construction site was divided into 10 operating units such as a construction area, a mechanical equipment parking area, and a steel support stacking area. The logistics and non-logistics relationships between the 10 operating units were analyzed separately. A job position correlation map was drawn based on the analysis results. The operating units were integrated according to the 1∶1 weighting of logistics and non-logistics relationships. A diagram was obtained for comprehensive relationships between the operating units. Then two preliminary optimization schemes were put forward. Using the weighted factor method to evaluate the above two schemes, the optimal scheme of the layout of the subway construction site was obtained. The results show that the layout scheme of the subway construction site obtained by using the system layout method can improve the construction efficiency and the safety management level of the construction site.

A method for optimizing index weight in quantitative evaluation of safety management level

DU Junwei, YU Yangyang, HU Qiang, LIU Bo

2019, 29(1): 167-172. doi:10.16265/j.cnki.issn1003-3033.2019.01.028

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In order to make the indicators of the petrochemical safety management evaluation index system more applicable to the variation of time, national policy and practical management requirement, based on the important evaluation information on incentive indicators in the existing sample accident cases by domain experts and the two-tuple linguistic information analysis method, the revised contribution degrees of the samples were obtained. Then the entropy weight method was introduced to compute the weights of indicators based on the amended contribution degree, time and hazard rating of all the sample accidents. An indicator adjusting system was developed based on the proposed method. The adjusting system was employed to optimize the existing weight of the indicators in the risk assessment system for a certain safety engineering research institute.The adjustments were performed in batches based on 1 874 samples. The amended results show that the K-L divergence of revised index weight curve and excellent practice index mean curve is getting smaller, and that the revised index system weight is close to the average weight of excellent practice index, so the effectiveness of the proposed method is demonstrated.

A risk assessment model for hazmat road transportation based on set pair analysis and its application

ZHOU Rongyi, LIN Jinyu , LIU Yong

2019, 29(1): 173-179. doi:10.16265/j.cnki.issn1003-3033.2019.01.029

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The paper was aimed at overcoming the deficiencies of current risk assessment methods for hazmat road transportation. Typical characteristics of the risk in the transportation, including its uncertainty, randomness and dynamics,were examined. A novel risk assessment method for hazmat road transportation was worked out on the basis of both IAHP and SPA. A risk assessment model was built for this method and its calculation steps, being establishing a risk assessment index system according to the risk factors on hazmat road transportation, using IAHP to obtain the weights of assessment indexes, making a same-different-opposite analysis for the certainty-uncertainty system of hazmat road transportation, and studying the dynamic change of risk factors according to connection degree, were presented. The method was applied to assessment of risk in the recent hazmat road transportation of a certain enterprise taken as an example. The results show that the risk assessment grade is basically in accord with the reality, and that SPA can be used to assess the risk factors of hazmat road transportation and their change trends, which provides a solid foundation for the prevention and control of hazmat road transportation accidents.

Task allocation of emergency rescue workers based on bilateral matching decision

YANG Qin, CHEN Jinming, LIU Ju, ZHANG Wei

2019, 29(1): 180-186. doi:10.16265/j.cnki.issn1003-3033.2019.01.030

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To improve the perceived fitness of bilateral subjects towards task allocation and enhance the rescue efficiency and quality, a bilateral matching model was built to maximize bilateral subjects' perception. Firstly, the selection process between the rescue workers and victims was described as an one-to-many bilateral matching problem and bilateral matching scheme evaluation indexes were formulated. Next, matching relationships were quantized and an one-to-many bilateral matching problem was transformed into a one-to-one bilateral matching problem. Thirdly, based on the prospect theory, the psychosensory responses of bilateral subjects under different evaluation indexes were characterized, thus a perceived fitness and acceptance function was constructed for the bilateral subjects. And then, a bilateral matching decision model maximizing overall perception of the bilateral subjects was built. Finally, an example was presented and solved to demonstrate the effectiveness of both the model and the method. The results show that the model and the method can be used to allocate tasks, meet the bilateral demands very efficiently.

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