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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
    Abstract1766)      PDF(pc) (1740KB)(2972)       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
    Abstract1448)      PDF(pc) (1456KB)(2153)       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
    Abstract1271)      PDF(pc) (1977KB)(1933)       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
    Abstract714)      PDF(pc) (1455KB)(1728)       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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    Discussion on relationship between safety management, risk management and emergency management based on Macro-security view
    TONG Ruipeng, WANG Lulu, LI Hongwei, GAO Ning, AN Yu
    China Safety Science Journal    2021, 31 (5): 36-44.   DOI: 10.16265/j.cnki.issn1003-3033.2021.05.006
    Abstract1410)      PDF(pc) (2956KB)(1590)       Save
    In order to break limitations of relationship analysis between safety management, risk management and emergency management, and to give full play to management effectiveness of them based on perspective of Macro-security, literature review method, speculative method and comparative analysis method were used to sort out management connotation and development course of them. Internal relationship was analyzed from five aspects such as research field, theoretical paradigm, responsible subject, management stage and system development evolution. The results show that safety management, risk management and emergency management research fields overlap and respectively focus on accidents, risks and emergencies. Theoretical paradigms are blended, and management basis is interoperable among them. Responsible subjects are the same, and all emphasize participation of all members. There are differences in management stages and focus. Development process of management system is different.
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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
    Abstract537)      PDF(pc) (1818KB)(1526)       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
    Abstract1538)      PDF(pc) (1264KB)(1498)       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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    Analysis of direct cause of accident and relationshipbetween hazard and hidden danger
    FU Gui, ZHANG Shijie
    China Safety Science Journal    2018, 28 (5): 1-5.   DOI: 10.16265/j.cnki.issn1003-3033.2018.05.001
    Abstract1183)      PDF(pc) (1439KB)(1374)       Save
    In order to correctly understand what are the direct causes of an accident and facilitate enterprises to establish the dual-prevention mechanism that has been promoted in China work safety management currently.An accident case was introduced and a clear definition of accident was put forward.The accident was decomposed into several events,and the direct causes of the accident were analyzed.The contents of hazard and hidden danger and the relationship between them were analyzed according to the current domestic and international regulations and standards and the theory of accident causation.The results show that the direct causes of an accident can be unsafe acts and unsafe conditions,or energy and its exchange,that an accident,accident causes and accident consequence are corresponding events respectively,that both hazard and hidden danger are causes or potential causes of an accident,and that there are three views on the relationship between hazard and hidden danger,including equivalent,inclusion and parallel,and the advantages,disadvantages and compliance are different,and among them,the view taking hazard as hidden danger is in accordance with the current regulations and standards.
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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
    Abstract658)      PDF(pc) (2588KB)(1315)       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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    Risk assessment of instrument transition flight training
    CHEN Huaqun, LIU Junjie
    China Safety Science Journal    2020, 30 (6): 64-70.   DOI: 10.16265/j.cnki.issn1003-3033.2020.06.010
    Abstract589)      PDF(pc) (1918KB)(1157)       Save
    In order to improve safety of instrument flight training for student pilots, training procedure and a risk assessment method based on instrument flight rules and aviation operation control theory were proposed, and a model algorithm based on airspace collision risk and route safety obstacle clearance was built. Then, a complete assessment process of instrument flight release was established, risk evaluation process and index system for procedure implementation were determined, and instrument flight training was carried out according to route transportation flight mode. Finally, the algorithm was verified with classic training test of Red Deer Base in Canada as an example. The results show that this model algorithm based on collision risk and obstacle clearance can systematically analyze relative elements and realize quantitative risk assessment of training content in all sessions
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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
    Abstract339)      PDF(pc) (1690KB)(1129)       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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    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
    Abstract449)      PDF(pc) (1854KB)(1109)       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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    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
    Abstract575)      PDF(pc) (1948KB)(1101)       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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    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
    Abstract641)      PDF(pc) (1574KB)(1046)       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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    Simulation study on personnel evacuation considering impacts of fire products
    YE Chenghao, LIU Yuechan, SUN Chao, JIANG Yongqing, WANG Bo
    China Safety Science Journal    2020, 30 (6): 142-151.   DOI: 10.16265/j.cnki.issn1003-3033.2020.06.021
    Abstract621)      PDF(pc) (3119KB)(1024)       Save
    In order to explore impacts of fire products on personnel evacuation in the event of a fire in buildings, relevant parameters of fire products were extracted through full-scale numerical simulation of building model, concept of personnel evacuation speed coefficient was introduced, and an evacuation speed model based on effects of fire products was established. Secondly, a new method to determine safe evacuation was put forward before numerical simulation was carried out for such evacuation considering impacts of fire products. Meanwhile influence of spray intensity and smoke exhaust rate on speed coefficient was analyzed. The results show that the proposed evacuation model can better reflect evacuation effects in the real fire site than traditional research methods. And addition of spraying and smoke extraction can effectively reduce impacts of fire products on evacuation speed.
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    Analysis of external environment problems of high-speed railway with measures and suggestions
    CHAI Guanhua
    China Safety Science Journal    2018, 28 (S1): 145-148.   DOI: 10.16265/j.cnki.issn1003-3033.2018.S1.027
    Abstract386)      PDF(pc) (1402KB)(1005)       Save
    High-speed railway equipment is placed in public places, it will be affected by the natural environment and social environment inevitably. In addition to wind, rain, snow and geological disasters and other external force majeure factors, high-speed railway external environment problems caused by the legacy of high-speed rail before operation, external human factor, real-time monitoring is not in place and other factors impact on the safety of high-speed railway operation increasingly. According to the summary analysis of the external environment problems about multiple high-speed rail in Beijing-Tianjin-Hebei region during the operation, combining with the site disposal of high-speed railway external environment problem, it detailed problem causes. It is suggested to further integrate the external environmental management resources of high-speed railway, improve the related management mode to reduce the influence of external environment problems on the operation safety of high-speed railway.
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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
    Abstract532)      PDF(pc) (2843KB)(999)       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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    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
    Abstract448)      PDF(pc) (1640KB)(986)       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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    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
    Abstract448)      PDF(pc) (1495KB)(980)       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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    Research on operation safety of traction power supply system based on accident statistics analysis
    WANG Zhigang
    China Safety Science Journal    2019, 29 (S2): 41-46.   DOI: 10.16265/j.cnki.issn1003-3033.2019.S2.007
    Abstract296)      PDF(pc) (1616KB)(926)       Save
    In order to improve professional management of traction power supply and ensure operational safety of traction power supply system, database was established based onkey items like time, location, impact, cause and responsibility of traction power supply accidents by using statistical analysis methodand considering characteristics of traction power supply. Then qualitative analysis was carried out from different dimensions,trend and law of accidents were summarized,main factors affecting system's operational safety were found and suggestions proposed.The results show that accidents have been declining in recent years. The system's operation safetyis greatly affected byexternal environment. Accidents caused by overturning rod, breaking line and collapse of catenary are more frequent and have a greater impact.
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