In order to play the important role of safety culture in preventing coal mine accidents and avoid the disconnection between safety culture and safety management，the current safety culture status of Shengli Energy was analyzed. On this basis，the 4-level safety culture model was applied to analyze the construction ideas and contents of the concept culture covering the two supreme principles of ″people-oriented″ and ″safety first″，the institutional culture of ″compliance with laws and regulations，clear responsibilities，and integration and innovation″，the behavioral culture of ″compliance with regulations，self-discipline，and responsibility″，and the material culture of ″advanced equipment，complete protection，visual standardization，and beautiful environment″. A safety culture system was established for Shengli Energy，and a standardized and replicable safety culture construction model was formed. The results show that the on-site application effect is good，and the mechanical and electrical injury risk rate in the enterprise has been lowered to 5% or less. The fault rate of flammable and explosive devices has been lowered to 3% or less，which has a certain reference value for the construction of safety culture systems for national coal enterprises.

In order to protect the psychological health of heavy-haul locomotive crew and explore the level of psychological health and influencing factors of heavy-haul locomotive crew，a sampling survey was conducted on the health and performance data of locomotive crew. First，the psychological health characteristics corresponding to safety performance were extracted，and psychological standards for the crew were developed. Then，the characteristics of the sampling objects were collected and counted，and influencing factors were analyzed. The results show that the safety attitude and safety thinking of heavy-haul locomotive crew are significantly higher than those of other job groups. At the same time，the psychological state of the heavy-haul locomotive crew is positively correlated with their level of education and negatively correlated with their sleep quality. Meanwhile，conducting psychological state assessments for the heavy-haul locomotive crew is helpful for normalizing psychological health monitoring. By constructing a full-cycle psychological health indicator for key positions，a new method for evaluating the psychological health of heavy-haul locomotive crew is developed，and it can serve as a reference for other industrial and mining enterprises to evaluate the psychological health of key position groups.

To prevent safety accident risks caused by human factors，a comprehensive survey was conducted on the psychological state of frontline operation and maintenance personnel in the new energy wind power industry. Firstly，the evaluation group and method of psychological health state and safety psychology were selected. Then，the current situation and characteristics of psychological health in the industry were summarized. Finally，relevant analyses were conducted from the perspectives of safety climate and team psychological safety. The survey results show that over half of the employees have poor or sub-optimal general psychological health，among which depression is a prominent issue. Employees have a high level of recognition for the company's safety regulations，but their sense of psychological safety within the team still needs to be strengthened. It is recommended to conduct psychological intervention through an employee assistance program to promote psychological health status and team psychological safety.

In order to improve the safety risk management level of coal chemical enterprises and eliminate safety management shortcomings，the production characteristics and safety risks of the coal chemical industry were analyzed. Based on the actual situation of the enterprises，the operation practice of the safety management system in coal chemical enterprises was discussed，covering the operation mode of the system，system operation planning，and implementation and operation effect of key elements of the system. From the aspects of safety leadership，system construction，safety risk management，unsafe behavior management，and system operation effectiveness，the ideas and methods for the operation of the safety management system in coal chemical enterprises were systematically elucidated. The results show that the operation ideas and modes of the safety management system in coal chemical enterprises combine multiple safety systems in the chemical industry，with comprehensive safety management elements and effective system operation. It can improve the safety risk management level of coal chemical enterprises and has practical and promotional value.

To effectively reduce the occurrence of coal mine accidents，a systematic analysis of key factors contributing to hidden dangers in coal mines was made by integrating grey theory with the decision-making trial and evaluation laboratory (Grey-DEMATEL) approach. By collecting extensive data on coal mine accidents and relevant literature，an indicator system encompassing multiple dimensions of hidden dangers in coal mines was established. Based on actual surveys and expert evaluations，13 hidden danger indicators were constructed. The Grey-DEMATEL approach was then employed for quantitative analysis of these hidden danger factors，enabling the identification of causal and resultant factors associated with hidden dangers. The research findings indicate that the primary causal factors leading to hidden dangers in coal mines include inaccurate information transmission，overdue equipment maintenance，and workers' violations of safety protocols. The resultant factors of hidden dangers comprise equipment failures，environmental issues，and management deficiencies. By introducing grey theory，the improved Grey-DEMATEL model can mitigate the bias in weight calculations commonly found in traditional models，providing more accurate results for the identification and management of hidden dangers in coal mines.

In order to further improve the safety production management level of heavy-haul railway enterprises and consolidate the foundation of safety production management，the safety production standardization construction and evaluation system was introduced into heavy-haul railway enterprises to promote safety production standardization construction in heavy-haul railway enterprises. Through research and analysis，the basic principles，system composition，element framework，operational model，work procedures，and evaluation methods of safety production standardization construction were clarified，and research on the safety production standardization evaluation system for heavy-haul railway enterprises was carried out. The safety production standardization evaluation system was mainly composed of three parts: a list of veto items，a list of bonus points，and a list of evaluation elements and weights. The evaluation elements included three core elements，40 first-level elements，and 190 second-level elements. At the same time，weight conversion solved the problem of how to evaluate the safety production standardization construction in some heavy-haul railway enterprises，which do not involve one or more first-level elements in the core elements within their business scope. The results show that the safety production standardization evaluation system effectively promotes the implementation of the main responsibilities of heavy-haul railway enterprises，as well as the systematization of safety management，standardization of job operation behaviors，intrinsic safety of equipment and facilities，and allocation of equipment in working environments，which strengthens the safety production management level of Xinzhun Railway Company.

To solve the problem of coal dust leakage from the coal handling system of coal-fired power plants，by comparing different solutions，dust prevention and control equipment and technologies were adopted including curved coal fallout pipe，fully enclosed dust-removing guide chute，pulsed bag dust collector，and wet dust collector. The optimized solution for dust reduction and prevention of the coal handling system was put forward. The dust prevention and control system covering the whole operation process of coal fuel ″turning，stacking，picking，and transporting″ was formed and was applied in Suizhou Power Generation Project. The results of the study show that the method effectively reduces the spillage of coal dust in all aspects of coal fuel transfer and basically realizes a dust-free operating environment and clean fuel transport. It provides a feasible dust prevention technology for controlling the coal dust pollution produced during the operation of the coal handling system.

In order to solve the stability problem caused by low strength and significant creep characteristics of soft rock in slope engineering of open-pit coal mines，the creep deformation characteristics and constitutive model of soft rock were studied. By taking the mudstone of an open-pit coal mine in eastern Inner Mongolia as the research object，based on the results of the triaxial creep test and the analysis of the traditional Burgers creep model，a new non-linear five-element creep damage model was established by introducing a strain-triggered non-linear dashpot. According to the principle of least squares，the parameters of the improved creep damage model were identified. The results show that the improved Burgers creep damage model has a fitting coefficient with the experimental data，which can fully describe the creep deformation characteristics of mudstone in the whole stage，especially in the accelerated creep damage stage. The fitting degree of the improved creep damage model is obviously better than that of the traditional Burgers creep model.

In order to fundamentally reduce the risk caused by climbing the pilot's ladder，a pilot boarding and disembarking device based on the offshore automatic stabilization platform was proposed. The device was composed of an attitude/motion measurement system，stability compensation control system，hydraulically driven automatic stabilization platform，and auxiliary pilot channel. Through the real-time and efficient parallel six-degree-of-freedom stability compensation algorithm of the automatic stabilization platform，the parametric design of the parallel mechanism based on the hull with the equipment and sea conditions，and the complex algorithm of system safety and reliability design，the stability of the device in the boarding and disembarking process was realized. The results show that the device can realize the essential safety of pilot boarding and disembarking，and the pilot can directly board and disembark the ship without using the pilot's ladder，reducing the risk of boarding and disembarking under heavy storm weather and fundamentally eliminating the safety hidden danger caused by improper placement of the ladder.

In order to solve the problems of serious dust accumulation and insignificant effect of ventilation and dust removal during the construction by full-section hard rock TBM method in the drainage corridor，the construction project of the drainage corridor of Jinyun Pumped Storage Power Station in Zhejiang Province was studied. Firstly，a three-dimensional model of the drainage corridor was established and meshed. Through mixed ventilation，the numerical simulation software Fluent was used to study the migration characteristics of airflow and dust. Then，by taking the three ventilation parameters of the distance between the dust removal air duct and the tunnel face，the distance between the ventilation air duct and the tunnel face，and the wind speed and pumping pressure ratio of the double duct as variables，the influence of the three parameters on the dust removal effect was explored respectively，and the three ventilation parameters were optimized. Finally，three preferred values were taken as the preferred scheme for field measurement to verify the dust removal effect of the scheme. The results show that the tunnel airflow presents different regions such as the jet zone，vortex zone，and recirculation zone. Dust diffusion is serious when forced ventilation (single ventilation duct) is adopted for energy saving. With the increase in the distance between the dust removal air duct and the ventilation air duct from the tunnel face，the dust mass concentration decreases first and then increases，and when the respective distances are 10 m and 12 m，the dust removal effect is better. When the pumping pressure ratio is 2，the dust removal effect is further improved. Compared with the original ventilation scheme，the optimized scheme achieves an average dust reduction rate of more than 95%，and the dust mass concentration in the staff concentration area is reduced to less than 2 mg/m³，which meets the relevant standards.