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 realize mining in high gas mines in low gas states，a set of comprehensive gas treatment technology based on over-pre-pumping of coal seam gas，pumping while mining，and pumping and mining in the goaf area was proposed. The comprehensive gas treatment technology and measures for 81305 comprehensively drained working face in Baode Coal Mine were introduced，and the comprehensive gas treatment measures were recorded in detail，such as pre-pumping before mining of the present coal seam，switching between downdraft and updraft，pumping and drainage by buried pipeline in goaf area，pressure equalizing，air guide curtain and negative pressure spray setting，rationally distributed air flow，and closing at the end of mining. The results show that the volume of the gas pumping and drainage in the 81305 working face has reached a total of 18.549 1 million m³，and the comprehensive pumping and drainage rate has reached 81.07%，indicating excellent application effects. The comprehensive gas treatment technology combining various pumping and drainage methods can make the gas concentration in the comprehensively drained working face in Baode Mine safe and controllable during mining.

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.

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.

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 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 reveal the effect of water content on the tensile and compressive mechanical properties of coal samples，coal samples from the No.22 seam of the Hanjiawa coal mine were selected. Brazilian disc splitting tests，uniaxial compression tests，and triaxial compression tests were conducted on coal samples with different moisture contents and confining pressures to explore the mechanical characteristics of water containing coal samples. The results show that the strength and elastic modulus of coal samples decreases exponentially with increasing water content. When the coal samples reach saturation，the strength and elastic modulus decrease by 48.3% and 37.6% respectively. With the increase in water content，the plasticity of coal samples is enhanced，and the samples are prone to breakage. Under triaxial compression，the peak value of failure and the strength of coal samples increase with the increase of confining pressure. However，the strength of water-bearing coal samples under different confining pressures is obviously lower than that of dry coal samples. The water content has little effect on the internal friction angle of coal samples but has a significant effect on the cohesive force of coal samples.

To address the low prediction performance of drilling risks in unknown formations during oil and gas development，a drilling risk assessment approach based on grey adjacent well information was proposed. Firstly，a three-parameter interval grey number was proposed to present formation information. Secondly，the depth adjustment and weighted interpolation methods were used to develop a target well gray wellbore information matrix based on adjacent well information. Subsequently，a three-parameter grey safety drilling fluid density window was proposed. Then，a risk assessment model including overflow，well leakage，collapse，and adhesion was developed based on generalized strength-interference theory. Finally，a case study was performed on five wells in an oil field in western China. The results indicated that introduced concept of wellbore information matrix and optimization parameter description of depth adjustment and weighted interpolation effectively presented the profile of the target well's wellbore information. The grey safe drilling fluid density window developed by three-parameter interval grey numbers and wellbore information matrix significantly reduced uncertainty in drilling risk assessment. The evaluation results from drilling risk assessment model based on generalized strength-interference theory agreed well with that in real situations，providing reliable fundamental knowledge for drilling risk assessment.

To effectively assess the various risks faced by the multifunctional reserve general warehouse，a comprehensive safety evaluation method for the multifunctional reserve general warehouse was proposed. First，the integrated risk characteristics of dynamic-static unity，subjective-objective unity，and direct-indirect unity for multifunctional the reserve general warehouse were summarized. Next，based on the combination of a static risk index system and a dynamic risk assessment model，a method for measuring the triggering effects and calculating the residual risks of the multifunctional reserve general warehouse was proposed. Lastly，safety evaluation criteria were delineated. Taking the core area of a logistics hub in China as the application case，the safety risks of the selected district were evaluated. The applicability and shortcomings of the proposed comprehensive evaluation method for the multifunctional reserve general warehouse were discussed. The results indicate that the method can effectively reflect the risks and their changing trends of the studied warehousing system. The practical application demonstrates that it is crucial to determine the trigger relationships and residual risks for accurately characterizing and evaluating the safety status of the multifunctional reserve general warehouse.

To effectively optimize the shield construction parameters and achieve the goals of safety，efficiency，and energy-saving in the large-diameter slurry shield tunneling process，a hybrid intelligent algorithm combining categorical boosting (CatBoost) and decomposition was proposed based on a multi-objective evolutionary algorithm (MOEAD). The main shield construction parameters were set as the major research objects considering shield construction parameters and geological conditions，and the surface settlement，penetration rate，and tunneling-specific energy were determined as the prediction and control objectives. Moreover，the selected shield construction parameters were optimized，and a line of Wuhan rail transit was used to validate the hybrid algorithm performance. The results showed that the proposed CatBoost algorithm had great prediction performance for large-diameter slurry shields with the fitting accuracy (R²) of the three control objectives more than 0.9. The model's importance rank indicated that the total propulsion force and propulsion speed of the large-diameter slurry shield had significant influences on surface settlement，penetration，and tunneling-specific energy. The proposed CatBoost-MOEAD hybrid intelligent algorithm had an obvious optimization effect on the three control objectives，and the optimization ranges of surface settlement，penetration rate，and tunneling-specific energy reached 12.35%，7.47%，and 10.70%，respectively. Moreover，the control ranges of corresponding shield construction parameters were presented.