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    Multi-objective optimization design for safety system based on isolation-inoperability competing failure mechanism
    ZHAO Jianqiang, XIONG Yanming, ZHANG Youjian
    China Safety Science Journal    2020, 30 (6): 1-7.   DOI: 10.16265/j.cnki.issn1003-3033.2020.06.001
    Abstract1051)      PDF (1740KB)(2094)       Save
    In order to avoid single indicator-based design flaw, a multi-objective optimization design method of safety system based on isolation-inoperability competing failure mechanism was proposed. Considering that the core of this method was thresholds setting of isolation component and inoperability component, three performance indices, including PLOAS, reliability loss, mass cost, were utilized to express influence of thresholds setting on system safety, reliability, and mass respectively. On this basis, a relevant multi-objective optimization function was established, and linear weighted method was applied to converse multi-objective optimization problem to a single one. The results show that the proposed method is suitable for solving multi-objective optimization problem based on isolation-inoperability competing failure mechanism, and Pareto solution sets can be obtained not only for three objectives optimization problem, but also for two objectives optimization problem under strong restriction of safety.
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    Study on causes of accidents in construction of natural gas pipelines
    SUN Shimei, GAO Xiaodi, SUN He, FU Gui
    China Safety Science Journal    2020, 30 (6): 8-13.   DOI: 10.16265/j.cnki.issn1003-3033.2020.06.002
    Abstract939)      PDF (1456KB)(1573)       Save
    In order to prevent natural gas pipeline construction accidents, causes of 32 natural accidents of such were analyzed by using "2-4" model causal factor coding system.16 causal factors involved in the accident were obtained through statistical analysis of 29 factors at 4 levels, and 5 most frequent ones were analyzed in detail. The results show that for all investigated accidents, the major reasons for them are personnel's faulty operation from the category of illegal and unsafe operation, inconformity of external conditions before construction with requirements from unsafe states, insufficient mastery of equipment and material characteristics from safety knowledge, failure to realize importance of construction procedures from safety awareness, unreasonable deployment of on-site safety supervision personnel from safety management structure defect, and continuous rain from natural factors.
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    Research on modelling of safety system emergence and its key issues
    LIAO Xiuping, WU Chao, WANG Bing
    China Safety Science Journal    2021, 31 (2): 1-8.   DOI: 10.16265/j.cnki.issn 1003-3033.2021.02.001
    Abstract907)      PDF (1977KB)(1434)       Save
    In order to promote development of basic theory of safety science, research on emergence of safety system was carried out based on system emergence thought implied in safety issues. Firstly, emergence thinking contained in safety theories was extracted through dialectical analysis, safety system emergence was defined and its conceptual model was established. Then, the concept was analyzed from multiple perspectives through dimensionality reduction analysis on complexity of security system. Thirdly, key issues and directions of safety system emergence research were proposed, followed by summary of their significance to safety system emergence research. Finally, safety system emergence was used to provide some explanation about coronavirus pandemic. The results show that system emergence is an important property of the complex safety system and it is an outcome of complex interrelation within system on the basis of its related concepts. Safety system emergence provides a brand new perspective to study safety issues and deserves deeper and comprehensive research.
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    Study on influence of safety risk and hidden danger management on railway safety
    LI Shuo, YUAN Yingqun
    China Safety Science Journal    2019, 29 (S2): 99-103.   DOI: 10.16265/j.cnki.issn1003-3033.2019.S2.017
    Abstract333)      PDF (1455KB)(1062)       Save
    In order to eliminate safety risks and hidden danger of railway and realize safe railway transportation, firstly, risk and hidden danger management of various industries at home and abroad was analyzed, and state requirement for establishing a dual prevention mechanism for risks and hazards was described. Then, leading experience of some local governments was introduced in detail, and current situation of railway risk and hidden danger management was explained. Finally, it was pointed out that there were some problems in railway enterprises, such as concept confusion of safety risk and hidden danger, enlargement of risk management, and lack of a safety hidden danger management system.The results show that railway enterprises should improve their risk management system, implement double prevention mechanism, strengthen information construction and adopt other means to promote railway transportation safety.
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    Analysis of causes of accidents in chemical industry based on HFACS model
    WANG Jing, FAN Yunxiao, GAO Yuan
    China Safety Science Journal    2018, 28 (9): 81-86.   DOI: 10.16265/j.cnki.issn1003-3033.2018.09.014
    Abstract217)      PDF (1818KB)(1060)       Save
    In order to reveal the vulnerability of safety management systems in Chinese chemical industry, firstly,based on the characteristics of chemical accidents,the specific manifestations of each cause category in HFACS were identified. Then ,HFACS model was supplemented,and an analysis of causes of accidents was made using the supplemented HFACS model on the basis of data on a certain chemical enterprise's 102 accidents occurred in 2012-2016. Finally, corresponding improvement and control measures were proposed to prevent chemical accidents in the future.The results show that the unsafe behavior of employees is mainly manifested in the routine violations and skill-based errors, and its main cause is lack of risk assessment for equipment or process, that the root causes of the operator's unsafe behavior are the poor concentration and vigilance of operator in adverse mental state factors, and without wearing PPE, that main forms of unsafe supervision are lack of providing both safety supervision and risk assessment,and that organizational influence factors are mainly manifested in lack of a safety climate.
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    Study on mental health status and influencing factors of university students during COVID-19
    LIU Haijuan, CHEN Ju, HE Ziming
    China Safety Science Journal    2021, 31 (5): 168-173.   DOI: 10.16265/j.cnki.issn1003-3033.2021.05.025
    Abstract564)      PDF (1264KB)(975)       Save
    In order to do a good job of mental health education for university students under COVID-19 epidemic,DASS-21 scale was applied to measure undergraduates'mental health status. An internet-based questionnaire was taken by 6 157 undergraduates to measure their mental health status. The results show that there are some symptoms of stress, anxiety and depression in university students. University students whose family economic status is poor and whose family economic status is affected by COVID-19 epidemic have obvious symptoms of anxiety and depression. Stress, anxiety and depression symptoms are most severe among students with severe physical and mental illness.
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    Research on BIM-GA-BN based model for evaluating elderly care community construction safety
    XIE Zunxian, GUO Yan, PU Tao
    China Safety Science Journal    2018, 28 (9): 19-25.   DOI: 10.16265/j.cnki.issn1003-3033.2018.09.004
    Abstract163)      PDF (1690KB)(934)       Save
    The purpose of this paper is to provide elderly care community construction management personnel with a basis for decision-making. The BIM technology, GA and BN are combined to build a model for evaluating elderly care community construction safety. This model was applied to specific construction projects to evaluate the safety states and find out weak links in the construction safety management. The research shows that the model can be used to collect, process and analyze data on elderly care community construction sites, describe the overall safety states of the projects and identify the key control factors, and put forward helpful suggestions on improving the safety management of the construction sites.
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    Network model establishment and analysis of tower crane safety accident causes
    ZHANG Wei, ZHANG Xiao, XUE Nannan, ZHAO Tingsheng
    China Safety Science Journal    2020, 30 (12): 1-7.   DOI: 10.16265/j.cnki.issn 1003-3033.2020.12.001
    Abstract356)      PDF (2588KB)(924)       Save
    In order to identify critical causes and paths of tower crane accidents in construction engineering, a causation analysis method was proposed based on complex network. Firstly, accident causes were classified into 6 subsystems and 34 factors based on literature review and system thinking according to relevant laws, regulations and standards about tower crane safety. Then, with empirical data of 194 tower crane accident reports from relevant department in China, an accident causation network model of tower crane was established with causes as nodes and correlations among them as edges. Finally, statistical indicators of the model, such as degree, strength and shortest path, were calculated and analyzed, and nine critical causes, three pairs of strongly related causes and three key causation paths were identified. All these causes and paths can be taken as priorities during practice of tower crane safety control.
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    Research on characteristics of expressway truck accidents in different regions
    LI Zhenming, NIU Yi, FAN Yunxiao, WANG Rui
    China Safety Science Journal    2020, 30 (6): 121-127.   DOI: 10.16265/j.cnki.issn1003-3033.2020.06.018
    Abstract258)      PDF (1854KB)(751)       Save
    In order to fully explore differences of truck accident characteristics in different regions and prevent high occurrence of truck accidents, methods such as taxonomy and social network analysis were applied to study data of major accidents in Zhejiang from South and Jilin Province from North respectively. Then, based on preliminary classification analysis of data, a network diagram of influencing factors and a ranking table of centrality were constructed, and two sets of data were compared. The results show that there are great differences in number, severity, cause and complexity of truck accidents between two provinces. Weather condition, vehicle type and fatigue driving are important factors that affect accident severity while region difference, weather and driving experience exert comparatively significant influence on unsafe driving behaviors.
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    Structural equation model between safety accidents and network capability of construction enterprises
    ZHANG Jianshe, ZHANG Wenyu, CHENG Ruiya, LUO Chunyang, WANG Tianxing
    China Safety Science Journal    2020, 30 (6): 57-63.   DOI: 10.16265/j.cnki.issn1003-3033.2020.06.009
    Abstract354)      PDF (2843KB)(751)       Save
    In order to investigate how safety accidents affect network capability of construction enterprises, connotation of network capability was defined and it was divided into five dimensions, network vision, network construction, network management, network learning and emotional embedding. Then, hypothesis of relationship between safety accidents and network capability was put forward, data were collected through questionnaire survey and empirical analysis was made using SEM. The results show that safety incidents have a significant and direct impact on network vision, network construction, network management and emotional embedding, among which influence on network vision and emotional embedding is greater than that on network construction and network management. And they exert a significant and indirect impact on network learning through intermediary role of network vision and emotional embedding, among which that role of emotional embedding is greater than that of network vision. Therefore, construction enterprises can reduce impacts of safety accidents on network capacity through strategic planning of network in time, strengthening coordination between organizations and emotional ties.
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    Application research of light scattering principle in dust measurement system
    FU Shigen, LI Quanming, HU Jiaguo, DONG Hewei
    China Safety Science Journal    2020, 30 (6): 37-42.   DOI: 10.16265/j.cnki.issn1003-3033.2020.06.006
    Abstract293)      PDF (1495KB)(740)       Save
    In order to prevent harm caused by respiratory dust and to monitor mass concentration of individual exhalation dust, a portable personal concentration monitoring test prototype was developed by using infrared light emitting photodiode as a light source according to principle of light scattering, and its pneumatic control circuit and optical control and detection circuit were designed.Then, prototype and comparison instrument were put in a self-made dust test device together with dust gas which featured a flow rate of 2 L/min and a particle size of 5 μm. The results show that when mass concentration of dust is between 0-150 mg/m3, measured voltage of prototype increases along with increase of dust concentration, and they maintain a good linear relationship. The relative error between measured concentration value of prototype by using regression equation and that of comparison instrument is within ±4%, indicating that the device meets requirements of relevant dust verification regulations.
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    Analysis on chain intermediary mechanism of mindfulness's influence on safety performance
    NIU Lixia, LIU Yong, LI Naiwen
    China Safety Science Journal    2020, 30 (6): 14-22.   DOI: 10.16265/j.cnki.issn1003-3033.2020.06.003
    Abstract422)      PDF (1574KB)(737)       Save
    In order to prevent unsafe behaviors of miners and improve safety performance of coal mining enterprises, mechanism and boundary conditions of mindfulness on safety performance were actively explored. A questionnaire survey and data analysis were conducted for 1 125 miners in Liaoning, Inner Mongolia and Shaanxi by using follow-up survey method, and a hypothetical model was verified. The results show that mindfulness is significantly positively correlated with safety performance and self-control while it is significantly negatively correlated with mind wandering. Self-control is significantly positively correlated with safety performance,but significantly negatively correlated with mind wandering, and there is a significant negative correlation between mind wandering and safety performance. Self-control plays an intermediary role between mindfulness and safety performance, mind wandering plays an intermediary role between mindfulness and safety performance, and they together play a chain-mediated role between mindfulness and safety performance. That is, miners with a high level of mindfulness can improve self-control ability, thereby reducing frequency of mental wandering and ultimately improving their safety performance.
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    Progress and perspective of data-driven train delay propagation
    WEN Chao, LI Zhongcan, HUANG Ping, TIAN Rui, MOU Weiwei, LI Li
    China Safety Science Journal    2019, 29 (S2): 1-9.   DOI: 10.16265/j.cnki.issn1003-3033.2019.S2.001
    Abstract409)      PDF (1859KB)(715)       Save
    The research aims to summarize and analyze the latest progress of train delay propagation and to clarify the application status of data-driven methods. Firstly, the connotation of delay propagation wasexpounded, and the delay propagation process was analyzed.The researches on delay propagation driven by traditional mathematical methods were analyzed. Next, the data-driven models of train delay propagation werereviewed, and the application of statistical models, computational intelligence, and machine learning models wereanalyzed for delay prediction and delay recoverywhich are two key issues fordelay propagation. Finally, the shortcomings of existing researches were concludedfrom four aspects andthe trend of future research was pointed out.The results show thatthe proposed train delay propagation and recovery models based on artificial intelligence and deep learning can assist dispatchers in improving the quality of dispatching decisions and reducing the workload of dispatchers.
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    Network emotion propagation model of public health emergencies based on social combustion theory
    WANG Shengmin, SONG Yinghua, LIU Dan, CHEN Hongzhou, FANG Jun
    China Safety Science Journal    2021, 31 (2): 16-23.   DOI: 10.16265/j.cnki.issn 1003-3033.2021.02.003
    Abstract283)      PDF (1948KB)(711)       Save
    To effectively guide and control online public opinion under public health emergencies, online emotional transmission mechanism of public health emergencies was studied based on social combustion theory by considering social relevance and uncertainty of emotional state transfer between network groups. Firstly, based on social combustion theory, social influencing factors of network user groups were analyzed, and network emotion propagation model of unflaring - smouldering - burning - suppression - stabilization (UDBFS) and network emotion propagation model considering intervention measures were established. Then, take COVID-19 epidemic as an example, simulation and intervention tests were carried out, rationality of model and intervention measures were verifed, and impact of intensity of intervention measures on online emotional transmission was analysed. The results show that model is convenient to describe the spread of online emotions in COVID-19 epidemic, and intervention measures can effectively suppress the spread of bad online emotions, and reduce the number of users of combustion by 32.9%. At the same time, lowering the “social ignition temperature“can rapidly reduce the number of “combustion” users within a short time after outbreak of event.
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    Research on problem of shift working hour system and reducing fatigue of workers
    GUO Xiaoyi
    China Safety Science Journal    2018, 28 (S2): 36-40.   DOI: 10.16265/j.cnki.issn1003-3033.2018.S2.007
    Abstract299)      PDF (1351KB)(686)       Save
    Preventing the hyper-fatigue of shift workers for working too long is an inevitable requirement for ensuring the safety and efficiency of railway transportation production. In this paper, according to the problems related to shift working hours system, by studying the evolution of railway working hours and shift system and the relevant policy provisions of working hours system, the actual working time standards of different shift workers in railways were given, and the measurement principle of working hours and shifts of railway shift employees was explored. And examples were given to explain the determination and grading of labor intensity, measures were put forward to ensure intermittent time during shift work, and the effect of intermittent time during shift work to ensure safe production were illuminated. The results show that: taking full advantage of the intermittent time during shift work can effectively reduce the fatigue of employees, promote safe production and improve labor efficiency. By reforming production organizations, optimizing labor organizations, and using advanced technologies and advanced equipment such as advanced equipment, we can improve the utilization of working hours and ensure the implementation of intermittent time.
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    Study on combustion properties of magnesium oxysulfate cement/polystyrene composites
    YU Shuijun, XIE Gaochao, REN Mo, YANG Dailin
    China Safety Science Journal    2020, 30 (6): 31-36.   DOI: 10.16265/j.cnki.issn1003-3033.2020.06.005
    Abstract286)      PDF (3042KB)(678)       Save
    In order to solve problem that polystyrene is inflammable and easy to produce poisonous gas, magnesium oxysulfate cement and polystyrene particles were used to make magnesium oxysulfate cement/polystyrene composite material. Then, effects of different ratios of lightly-burned magnesium oxide and heptahydrate magnesium oxysulfate on combustion performance of polystyrene particles were studied by LOI test, UL-94 vertical combustion test, smoke density test, and TGA. The results show that when content of magnesium sulfate maintains unchanged, weightlessness range and rate of polystyrene composites decreases with the increase of lightly-burned magnesium oxide, and so does the maximum mass loss rate while residual carbon rate increases with it at 700 ℃ with its maximum rate able to reach 80.73%. LOI of polystyrene coated with magnesium oxysulfate cement can reach up to 37.2%, and it increases along with that of magnesium oxysulfate when lightly-burned magnesium oxide stays fixed. It shows the same trend of LOI increasing along lightly-burned magnesium oxide when the other is unchanged. UL-94 level of composite materials can all reach V-0, and their smoke density is about 30 times lower than that of pure polystyrene particles. Flame retardation and smoke suppression of polystyrene are significantly improved by magnesium oxysulfate cement.
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    Research progress and practical application of safety psychology from perspective of new engineering
    TONG Ruipeng, LI Hongwei, ZHANG Na, XU Surui, AN Yu
    China Safety Science Journal    2020, 30 (1): 14-20.   DOI: 10.16265/j.cnki.issn1003-3033.2020.01.003
    Abstract213)      PDF (1640KB)(674)       Save
    In order to explore current research and application progress of safety psychology, and to further make up for shortcomings of its disciplinary contents from a perspective of new engineering, firstly, similarities and differences between safety psychology and OHP were compared through literature review, and its development history, models and methods, research objects and contents were sorted out. Then, through analyzing theoretical contents and problems in practice based on research results and psychological health policy, a vision was proposed that integrates OHP, safety ergonomics and practical interaction, and a mind map of this discipline was constructed. Finally, deficiencies of safety psychology in aspects of theoretical research, interventions as well as recognition degree were obtained. The result shows that safety psychology is similar to OHP, and its contents will be supplemented by a variety of practical application under a perspective of new engineering and thorough studies on it could be enhanced by a combination of “industry, education, research and application” to make up for its deficiencies.
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    Study on shortcomings in rules for investigation and analysis of casualty accidents of enterprise staff and workers and suggestions for classification of accident causes
    FU Gui, JIA Qingsong, XU Surui
    China Safety Science Journal    2018, 28 (4): 7-12.   DOI: 10.16265/j.cnki.issn1003-3033.2018.04.002
    Abstract166)      PDF (1320KB)(644)       Save
    In order to clearly identify the causes of the accident, this article mainly uses the thoughts of independence and exhaustion in Mutually Exclusive Collectively Exhaustive (MECE) analysis to test the scientificalness of the classification of the direct and indirect causes of accident in GB6442-1986, and finally draws the shortcomings in the classification of accident causes in GB6442-1986 from three perspectives: independence and exhaustion, scope of application and origin of accident-causing theory. After that, this article introduces the 24Model which divides the causes of accident into organization and individual to redefine unsafe acts and unsafe conditions, uses the new definition and classification to reclassify the items of direct and indirect causes in GB6442-1986.The results show that the new definitions and classifications contain all the causes mentioned in GB6442-1986 and can disperse and locate them at various levels or stages in 24Model.
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    Influence of safety value fit on safety behavior of miners: a chain mediating model
    MA Yue, LIU Yanping
    China Safety Science Journal    2021, 31 (2): 9-15.   DOI: 10.16265/j.cnki.issn 1003-3033.2021.02.002
    Abstract396)      PDF (1383KB)(602)       Save
    In order to explore influence mechanism of person-organization safety value fit on miners' safety behavior, a research hypothesis model was put forward through theoretical analysis and literature review. A questionnaire survey was conducted among 640 miners by means of convenient sampling method, and then, the model was analyzed and verified by structural equation modeling. The results show that there is a significant positive correlation between every two factors of person-organization safety value fit, safety self-efficacy, job involvement and safety behavior. Person-organization safety value fit can not only directly affect miners' safety behavior, but also indirectly influence them through impacting safety self-efficacy and job involvement, with the latter two factors playing a chain mediating role between them. Therefore, attention should not only be paid to person-organization safety value fit, but also to positive impacts of safety self-efficacy and job involvement.
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    Robust geotechnical design of soil-pile foundation system considering multiple failure modes
    DU Xiuli, CAO Xiuxiu, ZHONG Zilan, HOU Benwei, WANG Wei
    China Safety Science Journal    2020, 30 (6): 23-30.   DOI: 10.16265/j.cnki.issn1003-3033.2020.06.004
    Abstract282)      PDF (1645KB)(601)       Save
    In order to address uncertainties of geotechnical parameters and loads in pile foundation design, firstly, a RGD method considering multiple failure modes was proposed. Four typical failure modes, vertical ultimate limit state (ULS), vertical serviceability limit state (SLS), horizontal strength failure and horizontal deformation failure were analyzed. Then, Monte Carlo simulation (MCS) and point estimate method (PEM) nesting were adopted to compute mean value and standard deviation of failure probability for soil-pile foundation system, and the latter was used as an indicator to measure robustness. Finally, optimal design of soil-pile foundation system was finalized with robustness and cost as objectives. The results show that piles with different geometries have different dominant failure modes. With the increase of geometries, key failure mode changes from horizontal strength failure to vertical SLS, which has significant influence on gradient of of system' failure probability.
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