In order to explore the influence of initiation sequence on the crushing effect of open steps and the surrounding environment，the LS-DYNA simulation software was used to calculate the step blasting model under different initiation sequences. First，the physical and mechanical characteristics of the model under different initiation orders were analyzed. Then，the field test was conducted to verify the simulation results and study the influence of the initiation sequence on the blasting vibration strength and rock crushing degree. The results show that the stacking effect，which changes the stress wave，shows the breaking effect and blasting vibration strength. The hole-by-hole blasting technology can effectively reduce the blasting vibration so as to reduce the adverse effects on the surrounding environment，but the rock-crushing effect is not ideal; the rock passing rate is 81.52%. Compared with the hole-by-hole blasting，the passing rate of wave sequential blasting gravel is increased by 11.68%，and the amount of single-hole collapse is increased by 16.8% when the hole net parameter is increased to 3 m×7 m，which effectively reduces the explosive consumption and reduces the comprehensive cost. However，it produces a large blasting vibration strength，which needs to pay attention to the impact on the surrounding environment.

To solve the problem of heat damage caused by the continuous extension of coal mining depth，and to reveal the distribution characteristics of the temperature field in the deep-shaft roadway，five kinds of mining thermal insulation materials were selected to carry out the study of thermal insulation and cooling in the deep-shaft roadway，to analyze the effects of different thicknesses of the thermal insulation layer and different initial temperatures of the peripheral rock on the temperature field of the peripheral rock，the radius of the heat-regulating circle，and the temperature change of the wind flow in the roadway，and to analyze the evolution characteristics of the peripheral rock temperature field in the vicinity of the thermal insulation layer. The results show that foam heat-insulating concrete has the best heat-insulating performance and the lowest economic cost. The selection of lower thermal conductivity of the insulation layer helps to improve the thermal insulation effect of the insulation layer，and 5-10 cm is the best thickness of insulation layer，temperature field is consistent with the spatial distribution of peripheral rock layer，anchor spraying layer，and insulation layer，thermal conductivity of insulation material is negatively correlated with the tunnel peripheral rock temperature gradient，thickness of insulation layer，and temperature of the original rock are positively correlated with the tunnel peripheral rock temperature gradient，and thickness and temperature of insulation layer have a significant influence on radius of heat-regulating circle. Temperature has a certain degree of influence on radius of heat-regulating circle，compared with the roadway without a heat-insulating layer，roadway heat-insulating effect of cooling effect is significant.

In order to reduce the risk of fire and explosion caused by the anthraquinone process for preparing hydrogen peroxide，a risk assessment was carried out for the extraction and purification process，which is a more hazardous process in the preparation of hydrogen peroxide by anthraquinone process. Firstly，hazard sources of this process were analysed and a fault tree model was established through Freefta software. On the basis of this fault tree model，a dynamic Bayesian network model was drawn using GeNIe software. Secondly，expert scoring method and fuzzy analysis method were used to calculate prior probabilities of basic events in the model，and GeNIe software was used to calculate posterior probabilities of basic events in the model under the set preconditions. Eventually，by comparing change range between prior and posterior probabilities，important basic events were determined，hazard sources causing fire and explosion were revealed，and emergency response technologies were proposed. The results show that four major hazard sources，including pollution caused by degradation products and impurities，generation and increase of side reactions in process，catalyst failure and active chemical properties of hydrogen peroxide，have great impact on fire and explosion during extraction and purification process. It is more effective to develop emergency response technologies for important hazard sources from the perspective of preventing fire spread and liquid evacuation.

A comprehensive database of MWSA was established to facilitate the data management to reduce the frequency and severity of accidents in China. From 2010 to 2022，a total of 278 records，supervised by the State Council Security Committee，were collected and stored in the MWSA database. The distribution of accident characteristics was explored for the dimensions of accident time，space，industry and type，which were examined in this study. Using a comprehensive quantitative index，a quantile regression model was developed to identify factors that significantly influenced accident severity. The results show that in terms of spatial and temporal distribution，the number of accidents and deaths from June to September is at the peak，and the number of accidents and deaths on sunny days (7:00-18:00) accounts for as much as two-thirds. There are fewer accident records in Beijing，Tianjin，Jiangsu，Zhejiang，Shanghai and Fujian. Explosions and vehicle injuries notably stand out as the primary accident types. At a significance level of 0.05，the accident severity is correlated with various factors，including accident type，date，season，sunlight，weather，average temperature，company staff size and company establishment time. Weather and average temperature emerge as pivotal factors influencing low-severity accidents. Moreover，enterprises with less than 100 employees are more prone to severe accidents.

In order to effectively prevent and control the key safety risks in subway shield tunneling construction and accurately judge which risk coupling scenarios were significant ones leading to accidents，an improved N-K model was proposed to study the coupling effect of safety risks in subway shield tunneling. The key safety risks of subway shield tunneling were identified by comprehensively using literature research，accident case analysis and expert interview. Based on the N-K model，a new coupling analysis model of subway shield tunneling safety risk was proposed，and the applicability of the model was verified by a safety accident case. The results show that the list of key safety risk factors of subway shield tunneling is obtained，including 4 first-level risk factors (i.e.，personnel-type，equipment-type，environment-type and management-type safety risks) and 21 second-level risk factors. The safety risk value of subway shield tunneling construction increases with the increase of coupling factors. Safety risk coupling values with four factors are the highest，followed by the coupling values of three factors，and safety risk coupling values with two factors are the lowest. Coupling scenarios with workers' low safety awareness and machine failure participating are more susceptible to safety accidents.

In order to explore the spatial and temporal evolution characteristics of fire，economy and environment，based on the data of fire，economy and environment in China from 2000 to 2019，a fire-economy-environment coupling coordination model was established to study the coupling development level of fire，economy and environment system. Combined with ESDA method，the spatial and temporal evolution characteristics and aggregation of each subsystem in 31 provinces were studied，and the spatial correlation analysis of fire，economy and environment was carried out based on Moran 'I test. The research shows that the comprehensive development of fire，economy and environment has been well coupled from 2000 to 2019. From the time dimension，the coupling degree and coordination degree showed an upward trend from 2000 to 2019. The coupling degree was affected by the fire comprehensive score，and the coordination degree was affected by the economic subsystem. From the spatial dimension，economic development is the main factor affecting the coupling coordination degree of 31 provinces. From the analysis of the spatial and temporal evolution of the coupling relationship，the provincial coupling degree is aggregated with time，and the coupling coordination degree is random in spatial aggregation. The different effects of fire，economy and environment on coupling coordination lead to different coordination types and spatial aggregation states.

In order to improve the safety efficiency of heavy construction machinery installation and lifting operation and improve the visibility of installation and lifting operation personnel，a multi-agent visual accessibility BIM simulation method based on the visual cone method was proposed. The multi-agent visual task of the heavy construction machinery was obtained through the decomposition of the visual task of heavy construction machinery. Taking the installation and dismantling operation of the wk-35 electric shovel as the research object，the multi-agent visual task of hoisting driver，signal operator and cable operator was analyzed，and the multi-agent visual BIM simulation scene of installation，dismantling and hoisting operation was constructed by using Computer Aided Three-dimensional Interactive Application (CATIA) human factor simulation module. The visual cone method was used to calculate the multi-agent visual accessibility value in the process of installation and lifting. The process parameters of the BIM model were adjusted，the trend of multi-agent vision was deduced，and the multi-agent visual accessibility of installation，disassembly and hoisting was evaluated. The simulation results show that the visual accessibility of the lifting driver is poor in the process of lifting and descending，but good in the process of translation. The position of the signal operator and cable man is closely related to their visual accessibility. The visual accessibility of the signal operator is best when the visual field of view just covers the lifting driver and cable man. The cable man needs to constantly adjust his position to achieve the best visual accessibility.

In order to clarify the mechanism of safety and security incident causation from a safety and security intelligence perspective，and to consolidate the theoretical foundation for the investigation，analysis and prevention，and control of safety and security incidents from a safety and security intelligence perspective，research on safety and security incident causation model from a safety and security intelligence perspective was conducted. Firstly，according to the model for safety and security intelligence-safety and security behavior double loops，this paper analyzed the causes of safety and security incidents from a safety and security intelligence perspective. Secondly，the safety and security incident causation model from a safety and security intelligence perspective was constructed and explained. Finally，this paper analyzed the application of the safety and security incident causation model from a safety and security intelligence perspective with a safety and security incident on Line X of a city metro. The research shows that the safety and security incident causation model from a safety and security intelligence perspective is a safety and security incident causation system consisting of a safety and security intelligence loop and a safety and security behavior loop. According to this model，safety and security intelligence failures in the safety and security intelligence loop can lead to the disruption and collapse of the safety and security behavior loop of the system，resulting in a safety and security incident in the system.

In order to understand the influences of personality traits behind drivers' unsafe driving behavior，relevant studies on the relationship between personality traits and driving behavior at home and abroad since 2000 were reviewed. Using Preferred Reporting Items for Systematic Reviews and Meta-Analyses(PRISMA) standard，17 688 articles were retrieved from well-known domestic and foreign databases. After removing 3 160 duplicate articles，14 263 irrelevant articles and 198 non-excellent articles，67 excellent articles were finally included in this study. The relationships between different personality traits and unsafe driving behavior in these articles were summarized and sorted out. The results show that the five personality dimensions of the Big Five personality have different relationships with driving behavior. While sensation-seeking and impulsivity are both strong predictors of unsafe driving behavior，the latter has a stronger predictive ability. The direct predictive ability of driving anger on unsafe driving behavior is not strong. Additionally，factors such as normlessness，trait anxiety，altruism and narcissism have influence on unsafe driving behavior，although there is limited research on these. Furthermore，attachment，trait emotional intelligence，collectivism and abnormal personality traits need more tests. Some research results from Chinese samples diverge from the broader body of research，suggesting a need for cross-cultural studies.

In order to investigate the mechanical response of sandstone under cyclic stress from the energy perspective，the loading and unloading tests conducted along three cyclic paths which included an incremental step-by-step increase in initial peak stress at 10 MPa，an incremental step-by-step increase in initial peak stress at 80 MPa，and a constant peak stress maintained at 100 MPa. Subsequently，we analyzed the evolution characteristics of each energy component of sandstone based on the stress-strain curve and energy calculation results，taking into account the number of cycles and peak stress. The results show that as the number of cycles and peak stress increase，the hysteresis loop migrated to the direction of strain increase obviously only in the second cycle at the initial peak stress of 80 and 100 MPa. Different stress cycle paths make the unit volume dissipated energy shows different stage evolution characteristics. The energy values of sandstone change from a quadratic to a linear growth law as the peak stress increases in the hierarchical cyclic loading and unloading way，while in the constant amplitude cyclic loading and unloading way with the peak stress constant at 100 MPa，the unit volume energy and unit volume elastic energy of sandstone show an open downward quadratic decrease trend and the unit volume dissipative energy shows an exponential decrease trend. The effect of cyclic paths on the energy of sandstone in different stress ranges is quite different. In a comparison of the single and the hierarchical cyclic loading and unloading way，the energy difference is less than 10% when the peak stress is 80 MPa，while the energy difference is 22.74%-62.58% when the peak stress is 100 MPa.