To study the impact of marine environmental corrosion on the seismic performance of wind power towers，a 3 MW offshore wind power tower was used as an example. Based on a universal finite element analysis platform，wind power tower analysis models before and after corrosion were established，and time history analysis was used to study the collapse mechanism of the wind power tower during earthquakes. Through modal analysis，the impact of marine corrosion on the frequency and mode of vibration of structures was studied. Three natural ground motions (two far-field motions and one near-field motion) were selected，and time history analysis was used to study the deformation and damage evolution of the wind power tower. The collapse mechanism of the wind power tower was revealed based on the calculation results. The research results show that marine corrosion has a relatively small impact on the frequency and mode of vibration of the wind power tower. Under the action of near-field or short-term earthquakes，marine corrosion will not significantly change the collapse mechanism of the wind power tower. Under the action of long-term earthquakes，the corroded parts of the wind power tower will be damaged first，which will trigger higher-order modes of vibration and cause significant changes in the seismic damage and collapse mechanism of the wind power tower.

In order to improve the level of reservoir and dam safety monitoring and build an intelligent monitoring system for reservoirs and dams in Dadu River Basin，the problems and difficulties of traditional reservoir and dam monitoring operations were analyzed，and the innovative monitoring mode of reservoir and dam management center in Dadu River Basin was discussed. The results show that the reservoir and dam management center in Dadu River Basin has introduced intelligent three-dimensional (3D) deformation monitoring，Beidou satellite high-precision deformation monitoring，unmanned aerial vehicle (UAV) monitoring，underwater unmanned vehicle monitoring，intelligent patrol，intelligent deep inclination measurement monitoring，and other technologies and has built an intelligent safety management and control system for the reservoir and dam through technology innovation. The system integrates a number of monitoring technologies，integrates and analyzes multi-source data，and can realize intelligent management and control of operational safety risks and rapid emergency response.

There are many and complex factors influencing the safety status of electromechanical equipment in coal mines，and it is difficult to identify the potential safety hazards. To address these issues，a comprehensive safety evaluation model of electromechanical equipment in coal mines based on AHP-TOPSIS method was proposed. According to the cause theory of electromechanical equipment accidents in coal mines，20 evaluation indexes were selected from four aspects of human factors，electromechanical equipment maintenance，management organization，and working environment，and the safety status evaluation index system of electromechanical equipment in coal mines was constructed. Then，the AHP method was used to calculate the weight of each index，and the TOPSIS method was used to calculate the relative nearness degree between the sample and the ideal solution. The index weight was coupled with the relative nearness degree，and the safety level of electromechanical equipment in coal mines was predicted. Finally，the model was applied to a mine of Shanxi Coal Group. The results show that the safety level of electromechanical equipment in the coal mines mine is Level Ⅱ. According to the prediction results，the potential safety hazards are identified by reverse order analysis，and the analysis results are in line with the actual situation.

In order to solve the problems of imperfect construction of risk classification control mechanism，low informatization level，and insufficient employee participation in the construction of double-prevention mechanism in coal chemical enterprises and build a long-term double-prevention mechanism for enterprises，firstly，the design idea，system architecture，and function module of the digital platform were described in detail. Then，with risk classification control and hidden danger investigation and management as the core，data collection，intelligent analysis，early warning，task distribution，progress tracking，and other functions were integrated to realize the digital management of the whole process of safety production of coal chemical enterprises. Finally，combined with specific cases，the application effect of the double-prevention digital platform in coal chemical enterprises was evaluated. The results show that the platform can provide enterprises with a standardized and intelligent closed-loop management system from the aspects of risk identification and assessment，classification control，and hidden danger investigation and management，and it achieves good application effects in risk management and control，hidden danger investigation，and main responsibility implementation. The platform can grasp the risk dynamics in real time，discover and eliminate hidden dangers in time，improve the emergency response speed，and reduce the accident rate. It can provide a new idea for the informatization and intelligent construction of the double-prevention mechanism of coal-to-oil coal chemical enterprises and provide a reference for the construction of the double-prevention digital platform of other industrial and mining enterprises.

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.

In order to effectively leverage the role of information technology in the safety management of power generation enterprises，the current situation of information management systems and power enterprise safety management was analyzed from the perspectives of group companies and grassroots enterprises. In response to key and difficult issues such as safety education，outsourcing management，and risk control，the construction of a safety credit management information system was proposed，which used technologies such as photography，recording，and positioning to automatically record the behavior of personnel at all levels in fulfilling safety responsibilities，providing decision-making basis for improving the safety management of power enterprises. The results indicate that the construction and use of a safety management information system can significantly reduce safety management costs，effectively conduct performance evaluations，identify weaknesses in safety management，and predict potential safety risks.

In order to study the distribution characteristics of the three zones of spontaneous combustion in the goaf area of the gob-side entry retaining in the shallowly buried and easily spontaneous combustion coal seam，the variation laws of oxygen and temperature in the goaf area of the gob-side entry retaining were dynamically monitored by embedding high-pressure rubber hoses，high-strength steel pipe-protected optical fibers for temperature measurement，and monitoring beam tubes. With the help of numerical simulation software，the distribution range of the three zones of spontaneous combustion in the goaf area was determined. The results show that the oxygen concentration at the measurement points between the supports in the goaf area of the 31116 gob-side entry retaining shows an overall downward trend with the advancement of the working face，and the oxygen concentration at the measurement points in the return air channel is locally reversed due to the interference of air leakage at the corner. Based on the temperature measurement data of optical fibers，the temperature change cannot be used as the basis for the division of the three zones of spontaneous combustion in the goaf area of the gob-side entry retaining in Jinjie Coal Mine. Affected by the airflow migration and local air leakage，the oxygen concentration in the goaf area of the 31116 is slightly higher on the return air side than on the intake air side. Finally，it is obtained that the oxidation zone range on the intake air side of the 31116 is 140.4-313.3 m. In the middle part，the range is 201.2-351.6 m，and on the return air side，it is 153.2-328.1 m. According to factors such as the amount of residual coal in the goaf area and geological characteristics，it is comprehensively determined that the minimum advancing speed under normal production conditions of the working face is 3.3 m/d.

In order to prevent the occurrence of coal mine production site accidents，the application of information technology in coal mine mining was discussed through literature data，summary，and induction，and the meaning and main types of coal mine enterprise informatization were clarified in detail against the background of production informatization. The research shows that the key technologies of ″Internet +″ coal mine safety informatization include the Internet of Things，cloud computing，and big data，which provide efficient and scientific decision-making basis and technical means for coal mine safety. In order to support big data generated by the Internet of Things for coal mines，the ″Internet +″ coal mine safety information application framework composed of an information perception layer，data transmission layer，cloud computing resource layer，application service layer，and user interface layer is proposed. In addition，a construction model based on a proprietary cloud was proposed to make the system elastic and scalable.

In order to promote the safe operation and safety management of wind turbines in icing areas during winter under the new situation，the safety risk of wind turbine falling ice，equipment operation risk，and power supply risk were analyzed，and they are the most serious risks of blade icing. Based on these risks，a comprehensive ice monitoring method based on the combination of blade ice thickness monitoring method and wind turbine operation data monitoring method was proposed，and the safe operation of the wind turbine was classified. This article elaborated on the design and construction process of the first composite coating anti-icing technology scheme for large-scale in-service wind turbines in China. The results indicate that the composite coating anti-icing technology solution can effectively solve the problem of wind turbine icing and can provide a reference for similar engineering projects.

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.