The coal industry is the basic industry to ensure the safe and stable supply of energy in China. The continuous innovation and iteration of technology and equipment for the development and utilization of coal resources and the construction of intelligent super coal mine are important measures to develop advanced productivity in the coal field and help the high-quality development of the coal industry. The development of surrounding rock control technology in stope in China in recent years is systematically described, the evolution law of mining stress and the process of surrounding rock fracture and instability are analyzed, and the mechanical model of surrounding rock fracture and instability, control criteria and reasonable working resistance calculation method of hydraulic support are innovated. The development process of fully mechanized mining technology and equipment in China is elaborated, and the complete sets of equipment with the maximum mining height of 10m and the maximum supporting height of 7.0m are developed, which solves the technical problems of safe and efficient mining of shallow buried deep, hard, thick and extra-thick coal seams in western mining areas. This paper systematically analyzes the status quo, key technologies, achievements and main problems of intelligent coal mine construction in major coal producing areas of China, proposes the definition, characteristics and connotation of intelligent super coal mine, and expounds the achievements and experience of typical super coal mine construction. And from the standard system, data system, technology system, management system, ecological system construction and other aspects of the future development direction of the coal industry, to help the coal industry to achieve high-quality development．

To improve the problems of low coal recovery rate, difficult surrounding rock support, high gas emission, and frequent rock bursts in longwall top coal caving, the research development of staggered mining was summarized from three aspects: the basic principle of staggered mining, the control model of mine disaster using staggered mining and its engineering application. At present, the dynamic characteristics of staggered mining were mainly studied by on-site measurements using borehole stress gauges and similar simulation platform tests. Uniaxial compression experiments and numerical simulation calculations were widely used to study the energy conversion characteristics of staggered mining. The reasons for mine disasters caused by longwall top coal caving were summarized as the rapid release of energy accumulated in the coal seam and roof due to the large-scale and high-intensity collapse of the top coal, which leads to a chain reaction of mine disasters such as large deformation of the surrounding rock, gas exceeding the limit, and rock burst caused. Based on the staggered mining, three kinds of mine disaster control models were elaborated, and the joint support mechanism of staggered double roadway was explained from the perspectives of the surrounding rock environment and plastic development. The gas concentration distribution characteristics of staggered mining and longwall top coal caving were explained from the perspectives of porosity and flow field concentration. The energy distribution characteristics of staggered mining and longwall top coal caving were explained from the perspective of elastic strain energy and dissipation energy. The practical engineering applications of staggered mining technology were elaborated, such as the 1411 working face of Huafeng Coal Mine, the 18111 working face of Zhenchengdi Coal Mine, and the 5 (9) working face of Laogongyingzi Coal Mine. The on-site measured data shows that staggered mining technology can significantly reduce the advance abutment pressure and upper corner gas concentration during the working face mining, and can effectively prevent the occurrence of mine disasters. In the future, the prevention and control of mine disasters based on staggered mining still need to conduct in-depth research in basic theory, studying the laws of rock movement and energy evolution with the filling of staggered goaf, achieving the control of surface subsidence, and developing the comprehensive intelligent mining technology for staggered mining face, to achieve the goal of safe mining, green mining, and intelligent mining.

The construction of three-dimensional geological models is crucial for understanding and predicting underground structures. Geological drilling data can reflect the rock mass Based on the spatial distribution and geological structure characteristics, this study uses 23 geological drilling data from the 11th panel of Xiaobaodang No.1 coal mine as the basis, and adopts The method of adding virtual strata solves the problems of missing and duplicated strata, and constructs a three-dimensional geological model of a total of 27 strata, as well as two Dimensional profile model. In addition, in response to the difficulty of parameter selection in processing complex geological data using traditional kriging methods, this paper adopts a granular approach The subgroup algorithm is applied to the block values (C0) in traditional kriging interpolation methods Optimize the three key parameters of off base station value (C) and variable range (a), In order to overcome the subjectivity and uncertainty of parameter selection in ordinary kriging interpolation, the actual verification method was used to select four boreholes in the study area To compare the interpolation results, the results show that the Kriging algorithm optimized by PSO performs well in X3-1 The four boreholes X3-2, K3-4, and K3-5 The RMSE values decreased to 1 184, 1 267, 1 606, 1 560, an average reduction of 31% in RMSE compared to Kriging, and PSO Kriging algorithm applies to 2 at four drilling locations -The interpolation results of coal seam 2 have an error of 1 compared to the actual values 00 meters 0.01 meters 0.11m and 0 03 m, which is closer to the actual value than Kriging interpolation, indicates the effectiveness and superiority of the proposed method.

Under the condition of ‘Three-soft’（soft immediate roof, soft coal, and soft immediate floor） in large depth of burial, Xinhu Coal Mine，Huaibei City，the applicability of hydraulic support in No. 818 longwall top coal caving face is analyzed, and the hydraulic support automation system of the No.818 intelligent mining face is introduced. Through theoretical calculation, the max working resistance of the hydraulic support is 9940 KN. By analyzing the measured data in the field, it can be seen that the working resistance of the hydraulic support in the middle is the highest, followed by the Headgate part, and the Tailgate part is the smallest. The working resistance of the front column of the working face is larger than that of the rear column, when the working face is under pressure, the working resistance of the front column of the hydraulic support is 44.5% larger than that of the rear column on average, the ratio of the working resistance of the front column to that of the whole frame is roughly in the range of 0.57 to 0.74, and the average working resistance of the hydraulic support in the working face is 28.11 MPa. The method of calculating dynamic load is more suitable for calculating the working resistance of the hydraulic support in the working face of 818, and the calculation of the working resistance of the hydraulic support is more suitable for the calculation of the hydraulic support in the working face. The dynamic load calculation method is more suitable for the calculation of working resistance of No.818 working face, and the reasons for the bottoming of hydraulic support were analyzed, and the control measures of hydraulic support were proposed. Through numerical simulation, the influence range of the working face over-support pressure is 110 m in front of the coal wall, the peak stress in the middle of the working face is the largest, followed by the lower part, and finally the upper part, and the peak stress occurs 12 ~ 19 m in front of the coal wall, and it can be seen that in the range of 105 m outward of the coal wall, the bottom of the roadway dropsy and the deformation of the two gangs are relatively large, and the top of the roadway plate sinking and the bottom of the dropsy are more obvious, based on which the prevention of roadway bottom dropsy is proposed. On this basis, the relevant measures to prevent the dropsy of the roadway are proposed, in order to provide reference for the working face in Huaibei mining area and similar conditions.

Under the backdrop of the "Dual Carbon" strategy, China faces unprecedented opportunities and challenges in shutting down the development and utilization of mining resources. This paper reveals the current state of sustainable development in closed mines in China through a multidimensional analysis of policies and regulations, environmental governance, socio-economic impacts, and technological management. By incorporating typical case studies, it summarizes the research achievements in areas such as ecological restoration, underground space utilization, and the development of other potential resources in closed mines, and identifies existing problems in the sustainable development of closed mines. Through the study of existing policies, regulations, and standard norms regarding mine closure and withdrawal, comprehensive utilization of mine water, underground thermal energy development, environmental impact assessment, land reclamation, and ecological restoration, the paper suggests continuously strengthening political leadership and improving regulatory policies, accelerating the establishment and enhancement of resource standard evaluation systems, enhancing inter-departmental collaboration and institutional innovation, and promoting the integration of policy innovation with technological advancement. These measures aim to provide policy support and crucial guarantees for the sustainable development of closed mines.

In order to solve the difficulties including gangue disposal, disaster management and ecological protection that affect efficient coal mining, the five-in-one safe and green mining method featuring isolated grouting-filling for overburden rock and waste disposal, washout prevention, vibration damping, water preservation and sedimentation reduction was proposed for millions of tons of coal gangues. The research proposes a step-type self-flowing slurry production and transportation method, which solves many problems such as large-scale processing, system stability and energy saving, land occupation and long-distance transportation. The method has been tested in the Hulusu Coal Mine of China National Coal Group Corp, and the demonstration project has realized the production capacity of 700,000 t/a in the first phase, and it will reach 1.5 million t/a after the the second phase. The cost of disposing tons of gangues is RMB 50 per ton, saving about RMB17.3 million of the cost of gangue and water disposal. The amount of surface subsidence of the slurry filling area has been reduced by 52.9-53.2% and the average water influx in the working face has been reduced by 17.7-29.1%, The frequency of rock burst energy decreased by 774 times, a decrease of 30.5%. The project has achieved great results in terms of economy, safety and environmental protection, realized safe and green mining, and played a positive demonstration role for the coal mines in Inner Mongolia and Shaanxi.

Abstract: Refrigeration and cooling were effective technical means for preventing and controlling thermal hazards in deep mines. During the construction of the refrigeration and cooling system in the Walnut Valley mine, there were several technical difficulties need to be solved, such as deep drilling of the cooling tube well, passing through the thick and strong aquifer of the Luohe Formation, and long-distance transportation of refrigerant for cooling. Based on the analysis of engineering and hydrogeological conditions, the article determined the design parameters for the two-stage opening and segmentation of the pipe well drilling.After conducting a research on the performance of pipeline cold insulation materials, the article proposed a design scheme for the protective wall pipe in the bedrock section under four cold insulation methods: composite steel pipe, static air, glass microsphere reinforced cement, and steel-based composite thermal insulation casing.Taking into comprehensive consideration factors such as cold insulation effect, cementing reliability, and construction difficulty, the steel-based composite thermal insulation casing was selected as the preferred option for the working pipe.According to the force calculation of the casing, the specifications and parameters of the protective wall pipe were verified.The implementation effect of the project shows that the temperature loss at the beginning and end of the downcomer on the well is about 1 °, which can meet the requirements of cooling capacity loss for long-distance transportation of refrigerant, and has promotion and application value for similar projects.

Drainage system is one of the key systems in coal mine, which is of great significance to discharge water gushing and ensure the safety of coal mine production. Aiming at problems such as low intelligence level and high power consumption of existing mine drainage system, an intelligent mine drainage system is proposed. The system takes PLC as the core and analyzes the liquid level and water gusher change rate of underground sump through fuzzy control algorithm. The optimal operation scheme of the drainage system is obtained, and the model structure is input into the PLC, combined with the flow of the drainage main road, pump pressure and other data, to achieve the purpose of intelligent operation of the water pump house and peak avoidance valley filling, and the random forest algorithm is used to analyze the vibration signal of the pump, and analyze the fault type and health state of the pump. The system can effectively improve the efficiency of underground drainage, reduce the wear rate of equipment, and reduce the power consumption of coal mine drainage system, which has certain reference value for the design of intelligent drainage system in coal mine.．

The large underground drainage pump station has a large installed capacity, high equipment heat generation, and poor heat dissipation conditions. In order to prevent the air temperature inside the pump station from exceeding the limit, the water pump unit is equipped with a water-cooled electric motor, and an external water cooling system is used to cool the electric motor. The heat generated during the operation of the electric motor is discharged outside the pump station. This article takes engineering as an example, calculates the required heat transfer capacity and cooling water volume of the cooling system, and proposes two schemes: open direct discharge and secondary heat exchange. After comparing the technical and economic schemes, it is determined to adopt the secondary heat exchange cooling system scheme. Based on the determined technical scheme and design principles, the author calculated and selected equipment for cooling system heat exchange, pressurization, filtration, circulation, constant pressure water replenishment, and control．

The overlapping of coal and gas resource mining rights in the Xinjie Taigemiao Mine Area has made it difficult to coordinate the planning and development of resources. Based on this, the paper investigates the "coal-gas" collaborative mining mode in the three-dimensional overlapping area of mining rights through methods such as research retrieval, theoretical analysis, and numerical simulation. The research shows that: ① The adverse scenarios of coal-gas cross mining mainly include corrosion of coal seams in underground gas well pipes, mining through abandoned wells, damage to surface settlement pipelines, and other economic and technical impacts. The mining mode can be classified into gas first, coal later, coal first, gas later, and collaborative cross-mining modes based on the relationship between time and space. The article provides targeted planning and layout for the natural gas corridor in the mining area. ② Under the "coal-gas" collaborative mining corridor mode, the recovery of corridor-protected coal pillars will create isolated working faces. The stress distribution characteristics of isolated working faces combined with the deep mining conditions in the mining area will further induce the principle of dynamic disasters. The arrangement of short and long working faces in the last stage of super-long working face recovery is conducive to stress regulation to weaken coal and rock dynamic disasters.

Abstract: Under the development requirements of new productive forces in ourcountry, Beiing Huayu Engineering Co.,Ltd. actively corresponds tothe national strategic goal of "carbon peak and carbon neutralityand combines the desian fields of mining, coal preparation, ancground overall engineering to comprehensively promote theinnovation of qreen zero carbon mining construction anddevelopment models empowered oy digital inteligenceSystematically exploring the new "four modernizations" miningconstruction model led by"green and zero carbon intelligence" interms of management processes,technological innovation. andscientific and technological transformation, this provides theoreticareference and practical support for leading the "green" path of thecoal industry and the new pattern of high-quality development of coalsurvev and desion enterorises.

To address the technical challenge of insufficient support capacity of I-beam for mining in the roadway of the southern wing excavation area of Baijigou Coal Mine, a novel technology of steel support with corrugated webs is proposed. Comparative calculations of load-bearing capacity were conducted using standardized formulas for the two types of supports. Additionally, the out-of-plane stability performance of steel support with corrugated webs was investigated using the finite element method. The design of overlapping joints for the corrugated steel beams and legs was developed, followed by on-site monitoring tests of the support system. The findings reveal that, with steel quantities similar to those of No. 11 I-beam for mining, the load-bearing capacity of the corrugated steel beams and legs increased by 74.3% and 50%, respectively, compared to the former, and deformation reduced by 78.3%. The placement of three longitudinal tie rods at both ends and the middle of the beams and legs was found to enhance the out-of-plane stability of the support. Under the premise of satisfying support strength requirements, the deformation at the middle of the corrugated steel beams decreased by an average of approximately 54.5% compared to I-beam for mining, and leg convergence reduced by an average of around 84%. The support effect of the steel support with corrugated webs proved significantly superior to that of I-beam for mining. Furthermore, the adoption of a single-shed replacement for the original cross-shed support method not only decreased labor intensity underground but also ensured the continuous production of the on-site working face.

In order to explore the deformation laws of gas drainage boreholes in soft and hard composite coal seams, the self-developed "a dynamic monitoring device for the stability of full-angle gas drainage boreholes" was used to conduct on-site monitoring. The system analyzed hard coal, soft coal, and soft coal. The deformation of gas drainage boreholes in hard composite coal seams, and the COMSOL numerical simulation method was used to verify the test results. The results show that the vertical strain sensitivity of the shallow part of the borehole lags behind that of the horizontal, and shows an alternating increase characteristic; Before the borehole strain attenuation stage, there is a short-term pseudo-equilibrium state, which is essentially the accumulation of internal stress in the coal body, which is then suddenly released to cause the borehole collapse; under the same external load conditions, the soft and hard interface will be a composite coal seam. Divided into two relatively independent stress environments, the coal seam has a sudden change of medium and a sudden change of stress at the weak interface; the deformation of each part of the hard coal seam is smaller than that of the soft coal seam, and both show large deformation in the shallow part and small deformation in the deep part. Finally, a stable hoop strain is achieved. The deformation of the perforation holes in the soft and hard composite coal seam in the shallow part is similar to the two. The deep part of the perforation holes and the weak interface cross and cut to form a stress concentration zone. The range of the stress concentration zone is along the weak interface and the borehole diameter. It extends at the same time and gradually attenuates. This attenuation presents an insignificant nonlinear characteristic.

Exploring the characteristics of concentrated stress transfer from coal pillars to the floor in the close distance coal seams plays an important guiding role in determining the control method of roadway surrounding rock. Selecting a typical close range coal seam in Duerping Mine, in Shanxi Province as a prototype, building a 100:1 similar material test model, and conducting excavation simulation tests on both sides of the coal pillar in the upper coal seam section. Using DIC technology to collect vertical, horizontal, and shear strains at different levels of the upper coal seam floor depth, and analyzing the distribution characteristics of the three strains and the variation pattern of the horizontal distance between the strain peak and the coal pillar boundary, Exploring the transmission characteristics of concentrated stress in the coal pillar of the upper coal seam to the floor after mining.The results show that: (1) In the coal pillar floor area, the three strains with the coal pillar center as the axis are all asymmetric Multimodal distribution distribution characteristics, and the strain peak values are different. The vertical and shear strain peak values are that the coal pillar side of the first excavation face is smaller than the coal pillar side of the later excavation face, while the horizontal strain peak values are that the coal pillar side of the first excavation face is larger than the coal pillar side of the later excavation face, and the three strain peak values decrease with the increase of the floor depth; The vertical and shear strains of the goaf floor, far from the boundary of the coal pillar in the section, gradually tend to zero, while the horizontal strain shows a constantly changing feature of increasing and decreasing. (2) The horizontal distance between the three types of strain peaks and the boundary of the coal pillar: the vertical strain is greater on the coal pillar side of the excavation face first than on the coal pillar side of the excavation face later, while the shear strain is exactly the opposite. The horizontal strain is equal on the coal pillar side of the excavation face successively, and the horizontal distance between the three types of strains and the boundary of the coal pillar increases as the depth of the bottom plate increases. (3) In the bottom plate area of the coal pillar, the vertical stress is compressive stress, while the horizontal stress is tensile stress, while the shear stress is tensile stress on the first mining face side and compressive stress on the second mining face side. Both vertical and shear stresses show high stress levels, but the horizontal stress is very small. The peak values of vertical and horizontal stress are located in the coal pillar floor area, while the peak values of shear stress are located in the goaf floor area. The vertical and shear stresses on the bottom of the goaf tend to be zero far from the boundary of the coal pillar, while the horizontal stress shows a characteristic of repeated transformation and increase and decrease. (4) The determination of the stability control method for the surrounding rock of close distance coal seam roadways should not only pay attention to the role of vertical stress, but also pay attention to the influence of shear stress on its instability and failure.

Abstract: Chute blockages, as a common issue in industrial production, not only affect production efficiency but also pose safety risks. Thus, real-time and accurate detection of chute blockage is of significant importance. However, traditional detection methods encounter various problems and challenges in practical applications, such as low accuracy and dependence on manual intervention. This paper proposes an innovative solution based on audio information to address these challenges. We construct a deep neural network model called WaveGNet, which combines WaveNet and GRU, for chute blockage detection. The model extracts and analyzes sound signals to identify characteristic patterns associated with blockages, achieving accurate detection. WaveNet excels in extracting high-quality sound features, while the GRU network captures temporal relationships within sound sequences. The fusion of these two components enhances our understanding of sound signals, enabling more accurate analysis in both the time and frequency domains. This approach reveals patterns relevant to blockage states, thereby enhancing detection accuracy and robustness.Our research directly captures blockage states through sound information, reducing the need for manual intervention and ensuring real-time capability. Our method offers an innovative, efficient, and reliable solution for chute blockage detection in industrial production, holding great potential in practical applications.

When treating the DTRO concentrated water from Yulin Xiaojihan Coal Mine, tubular microfiltration membrane (TMF) is used instead of the clarifier for solid-liquid separation. Under the condition that the calcium ion concentration of the incoming water is 210 mg/L, the magnesium ion concentration is 221 mg/L, and the total silicon content is 160 mg/L, coagulation is carried out by adding sodium metaaluminate, calcium chloride, magnesium chloride and other agents. Afterwards, the tubular microfiltration membrane is used for solid-liquid separation. The SiO2 removal rate is ≥95%. The effluent meets the requirements of calcium ion concentration ≤10 mg/L, magnesium ion concentration ≤10 mg/L, and total silicon content ≤10 mg/L. And it meets the requirements of reverse osmosis inlet water turbidity ≤ 1 NTU and SDI ≤ 5, Compared to the original process, the operating cost is saved by 10% to 20%.

Mine separation water disaster has become one of the difficulties in the prevention and control of roof water disasters due to its characteristics of unclear water inrush signs,large instantaneous water volume,hysteresis,periodic water inrush,etc. The research progress in the formation,disaster mechanism,prevention and control technology,monitoring and warning of separation water is systematically summarized. Separation water disaster is the coupling result of stope overburden movement and groundwater movement under the influence of mining. Through the performance of water inrush accidents,the structure and movement characteristics of overburden,the groundwater movement law and the relevant research status,the basic conditions and development rules of separation water are summarized. The mechanism of water inrush causes secondary disasters such as mud and sand collapse,gas emission,and cutting roof support. The vertical and horizontal position prediction of separation water is the key to the prevention and control of separation water disaster. On this basis,five prevention and control methods of separation water are introduced:surface straight-through water discharge hole,separation grouting filling,underground closure hole and underground diversion hole. Combined with the engineering practice,the characteristics and problems are analyzed. The separation water hazard risk is evaluated by the lithology combination and geological conditions of the rock strata. Combined with the monitoring data of water level,microseism,mine pressure,gas and so on in the mining process,the early warning of separation water hazard can be realized. The problems to be solved in the study of separation water are put forward,such as the chain reaction mechanism of separation water and its secondary disasters; The lack of scientific evaluation methods for the prevention and control technology of separation water; the limitations of geophysical detection technology make it difficult to capture accurate data of high separation.

In the process of coal mining, CO generation during coal mining is unavoidable. A small amount of CO will threaten the safety of workers. In order to protect the physical and mental health of workers and improve the environment under the mine. By using plasma technology, an experimental platform was established to study the effectiveness and influencing factors of plasma elimination of CO. The experimental results showed that the plasma had the best effect on CO elimination when the output voltage was 50kV and the electrode material was beryllium copper alloy. The higher the wind speed, the worse the elimination effect; With the increase of oxygen concentration and humidity, the amount of CO elimination shows an upward trend, with the best CO elimination effect at wind speed of 0.6m/s, oxygen concentration of 20.5%, and humidity of 30% RH.

In order to solve the problem of accurate prediction of ground dynamic subsidence in the dynamic control of subsidence land, this paper adopts the method of combining theoretical analysis with field measurement. Starting from the analysis of the dynamic subsidence process of ground points, the variation law of subsidence, subsidence velocity and subsidence acceleration in the dynamic subsidence process of ground points is clarified. On this basis, a dynamic subsidence prediction model based on Hill function is established, which conforms to the evolution process of dynamic subsidence of ground points. The model is verified by the measured data of surface subsidence in 5316 working face of jining No.3 Coal Mine, 3307 working face of Dongtan Coal Mine and CG1301 working face of Yineng Coal Mine. The results show that the relative error between the predicted value and the measured value is controlled within 3%, indicating that this model can well realize the dynamic subsidence prediction of the ground point.

Abstract: The distribution of wind pressure on the roof of a hemispherical coal storage yard was studied through wind tunnel tests. The average wind pressure coefficient contour, fluctuating wind pressure coefficient contour, and corresponding roof partition shape coefficients of the structure were obtained at 24 wind directions. The results show that under the action of wind load, the average wind pressure coefficient distribution on the windward surface of the hemispherical coal storage yard structure roof is perpendicular to the incoming flow direction and forms an equal pressure strip; The fan-shaped area below the windward surface is mainly subjected to wind pressure, with the maximum value occurring at the bottom edge of the windward surface of a hemispherical roof; The upper part, both sides, and leeward area of a hemispherical roof are mainly affected by wind suction, with the maximum value occurring near the eaves area affected by ventilation openings; When the transfer tower is located on both sides of the roof in the downwind direction, the negative pressure in the roof area near the transfer tower will show a large value, with an average wind pressure coefficient of -1.40; Due to its highest height, the ventilation area at the top of the roof has the highest suction force at all wind angles. In some areas, the body shape coefficient reaches -2.15 at a 60 ° wind angle, making it more susceptible to damage.

Due to the presence of a large number of outliers in the pipeline leakage signals collected by sensors, the extracted leakage signal features are inaccurate, resulting in low accuracy in locating pipeline leakage points. To this end, a leak location method for underground water supply pipelines in coal mines based on the IAWF algorithm and image data is proposed. Based on the characteristics of pipeline leakage signals, the IAWF algorithm is used to weight and fuse the collected monitoring values. The support matrix is used to calculate the support of the target sensor supported by other sensors, and the data measured by the sensor with the highest support is used to replace the abnormal values in the dataset. From this, the characteristics of the pipeline leakage signal are extracted, and the salient map of the pipeline image is obtained by introducing image data to determine the range of pipeline leakage. Based on this, the pressure gradient method is used to calculate the distance between the leakage point and the inlet end of the pipeline according to the changes in pipeline pressure and flow rate, in order to determine the location of the leakage point. The experimental results show that using the proposed method to locate the leakage point of the pipeline, the obtained positioning distance is consistent with the actual distance, and the positioning accuracy is high.

Studying the law of gas desorption-diffusion in coal is of great significance for fully understanding the mechanism of gas migration in coal, scientifically utilizing gas resources, and preventing and controlling gas disasters. Based on the numerical simulation method, the applicability of the unipore model, the bidisperse model and the dynamic diffusion coefficient model in the gas desorption-diffusion of coal particles was compared and analyzed. The gas pressure distribution law of the bidisperse model and the dynamic diffusion coefficient model and the sensitivity of the model parameters to the metamorphic degree, particle size and adsorption equilibrium pressure of the coal sample were studied. The results show that compared with the unipore model, the bidisperse model and the dynamic diffusion coefficient model can more accurately describe the gas desorption-diffusion law in the whole stage. The bidisperse model and the dynamic diffusion coefficient model describe the gas desorption-diffusion process in different ways. Compared with the bidisperse model, the dynamic diffusion coefficient model has a larger radial gas pressure gradient. The degree of coal sample metamorphism, particle size, and adsorption equilibrium pressure have a significant impact on the various parameters of the model, and its essence is the difference in pore structure in coal. The research results can provide guidance for reasonable selection of gas desorption-diffusion model and its parameters.