To solve the problems of complex production technology knowledge expression，decentralized information storage，and insufficient data sharing faced by coal preparation，a training platform for regulations and standards of coal preparation was constructed by introducing knowledge graph technology. The platform was designed using a service-oriented architecture (SOA). The system was developed by applying Python language and a large language model. The results show that through the standardized data processing process，the platform can build a complete coal preparation knowledge base and realize the functions of knowledge search，intelligent question and answering，and intelligent training. The platform covers regulations and standards of coal preparation and specialized technical documents and can provide convenient training services on regulations and standards of coal beneficiation. It can also be used as a reference for knowledge sharing and training application services in other areas of production technology.

In order to solve the problem that the information silos caused by the narrow bandwidth and long delay of the network in the fully mechanized coal mining face in the coal mine fail to meet the needs of intelligent mining，the 5G communication technology with high bandwidth and low delay was proposed to upgrade the industrial control system and design an intelligent coal mine safety control platform. Firstly，based on the design concept of an intelligent coal mine safety control platform，the overall architecture of the intelligent coal mine safety control platform was introduced，and the coal mine safety information processing mechanism was analyzed. Then，a coal mine safety risk analysis index system was constructed，and an improved particle swarm optimization algorithm was used to optimize a multi-layer feedforward neural network to determine the level of coal mine safety risks. Finally，based on 5G communication technology，the intelligent remote control of coal mines was achieved by combining geological data and video analysis of the coal mining face，5G remote control，personnel safety assurance，and digital twin systems. Research has shown that the intelligent coal mine safety control platform improves the storage，transmission，and processing efficiency of data streams，effectively avoiding the phenomenon of information silos between multiple systems and providing a new method for promoting the implementation of unmanned mining mode in coal mining faces and achieving efficient coal mine safety control.

In order to ensure the safe mining of isolated island working face with impact ground pressure，the isolated island working face mining under the condition of a thick and hard rock layer in a mine was taken as the background. Based on the key layer theory of rock layer control and the viewpoint of the spatial structure of overlying strata，the basic characteristics of the spatial structure of overlying strata formed in the isolated island working face were studied through case study，theoretical analysis，and on-site monitoring，as well as the monitoring and identification method and its anti-impact mining design. The formation process and distribution characteristics of the spatial structure of Γ-type overlying strata were identified，and a mechanical model of reasonable width of the isolated island working face under the spatial structure of Γ-type overlying strata and with the abutment pressure as the main assessment index was established and applied for verification. The results show that the isolated island working face under the condition of one side being fully mined and the other side not being fully mined can form a spatial structure of Γ-type overlying strata with the overlying thick key layer，and the implementation scheme proposed in the paper meets the requirements of the field engineering and can ensure normal mining.

In order to further improve the safety risk control capability of chemical research and experimental equipment，the causes of chemical research and experiment safety accidents in recent years were analyzed. Based on the current management practice of chemical research and experimental equipment，the safety risk control throughout the full life cycle from various aspects was implemented，such as feasibility study，design，construction，trial operation，and scrapping. The focus was on exploring the three main aspects of early safety review，equipment design，construction management，and operation safety management. By comparing the risk control of relatively mature hazardous chemical construction projects，the weak links and prominent problems in the chemical research and experimental equipment were analyzed. The results indicate that the safety risk control of chemical research and experiments is a systematic project that should fully draw on the experience of safety risk control in hazardous chemical construction projects. Scientific research and experimental equipment should be classified and reviewed for safety access control. Through source safety review，specification management design，construction quality control，confirmation of safety conditions during operation，equipment and facility management，hazardous chemical management，and other full process risk control measures，safety risks can be minimized to the greatest extent，providing references and choices for risk management of scientific research and experimental equipment.

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 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.

The roller bearings of open pit belt conveyors face problems of low fault identification accuracy. To improve the accuracy and efficiency of fault diagnosis，a fault signal detection method of roller bearings with CPSO algorithm based on OVMD was proposed. Firstly，the excellent global optimization characteristics of CPSO were utilized，and the optimal parameter setting of the variational mode decomposition (VMD) algorithm was precisely locked to achieve effective parameter tuning of VMD. Then，VMD technology after parameter tuning was used to process the vibration data，and specific frequency band signal components were accurately extracted from the vibration data. Finally，the sparse maximum harmonic noise ratio deconvolution (SMHD) technology was used to purify the above frequency band signals，which significantly enhanced the identification accuracy of the fault characteristics of roller bearings of belt conveyors. The results show that CPSO has better performance for VMD improvement than other VMD optimization algorithms. The VMD algorithm after CPSO optimization combined with SMHD can successfully identify the specific fault points of the inner and outer rings of the rolling bearings under complex working conditions and determine the specific damage forms of the bearings.

In order to prevent the occurrence of fire accidents caused by external factors in coal mines，achieve efficient and rapid response after the risk is out of control，and minimize casualties and property losses，the Daliuta coal mine of Shendong Coal Group was used as an example. The key external factors causing fire accidents in large and super-large coal mines were analyzed，and pre-disaster prevention and control measures were summarized. In addition，emergency response technologies were explored. The results show that long-distance tape machine friction ignition，overheating of high-voltage cables and equipment，and spontaneous combustion of auxiliary transportation vehicles are key external factors causing fires in large coal enterprises. Emergency response technologies such as airflow short circuits，local backflow，new air door control，fire zone closure，and compressed air self-rescue can be adopted to deal with fire accidents caused by external factors in coal mines. Fire accidents caused by external factors in coal mines feature common occurrences，serious losses，and difficult responses. Therefore，a comprehensive management technology combining pre-disaster prevention and emergency response is needed to ensure the safety of mine production.

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.