Based on the rock conditions and stress conditions of the pit loading chamber at the bottom of the Hongqinghe coal mine, the possibility of optimization of the chamber structure was analyzed, and the analysis methods of field investigation, numerical simulation and field measurement were adopted. This paper puts forward the design concept of "simple section, simple number, rational force" in the chamber. Through engineering practice, it is shown that compared with the traditional pit loading chamber, the above chamber design concept and layout form can greatly reduce the complexity of the chamber, simplify the pit loading chamber construction procedures, reduce the difficulty of construction, and improve the ability of the chamber to apply the change of surrounding rock stress. Meet the requirements of extra large coal mine skip loading chamber for space, safety, operation and working environment.

To determine the reasonable working resistance of support during fully mechanized mining wi-th large mining height in Xiaobaodang coal mine, According to the certain- conditions of No. 2-2 seam, By similar simulation and numerical simulation and dynamicload method study the strata observation lawand support working resistance. The results show that the first weighting step distance is 68m,and the a-verage periodic weighting step distance is 16m. the dynamic load coefficient is 1.31, The dynamic load coefficient increases with the working surface and the intensity of mine pressure is medium. Comprehen-sive analysis If the 1.75×4.75m support was selected, the working resistance was determined to be 14000kN. Because of the high mining height and the basic roof is hard. The lower basic roof appeared in the process of cantilever beam structure, when the cantilever beam breaks, all its weight is borne by the s-upport, the support loading is large. The results provide reference for the determination of working resis-tance of similar conditions.

Xiayukou coal mine is threatened by ordovician water from coal floor when mining 11# coal seam,thus?it is necessary to carry out the feasibility study before the mining under water pressure.By analyzing the aquifer,aquiclude and the water filling sources and passageway of Xiayukou coal mine,the water inrush risk of 11# coal seam is evaluated with water bursting coefficient.The results show that the aquiclude in the floor of 11# coal seam has good water-proof capability with stable thickness and dense lithology;the coal seam floor water burst coefficient of No.11 coal seam is only a small part area less than 0.06,most of the areas in the field have a water inrush coefficient of more than 0.06and a very dangerous area greater than 0.1,the action of mining need to be carefully.The results provide theoretical guidance for the exploitation of the Xiayukou coal mine, which is conducive to the safe and efficient production.

In connection with the problem of increasing ventilation resistance and wind overspeed in the later stage of Gucheng coal mine, to achieve the purpose of ventilation resistance and speed reduction by buliding auxiliary Ground Chamber. The detachable Chamber installed in the main tower can not only solve the problem of space shortage in the replacement of the skip but also can meet the requirement of ventilation resistance reduction without delaying production. Through the Specific engineering practice, the ventilation problem is solved, which provides a powerful reference basis for coal mine with similar problems when the ventilation system is reformed.

This paper introduces the introduction and development process of hydraulic grade cyclone in China, and expounds its function in the recovery process of coarse clean coal slime. Through the analysis of the product specifications of the hydrocyclone, that due to the particles sink ratio exists, will inevitably lead to the same particle materials of light and heavy products mismatch, commonly known as the "anti separation effect, resulting in coarse coal slime ash super easy products. The fine seam pneumatic impact sieve instead of the hydrocyclone, which can resolve the coarse coal in the process, the problem of high marl.

In order to effectively control the water inflow during the excavation of the open channel of the inclined shaft with thick alluvium with water content, the collapse of the side slope and the inclined slope is prevented, Combine the foundation ditch dewatering principle, through theoretical calculation and analysis, determine the open channel excavation tube flow, depth and layout.The tube well dewatering is adopted to lower water level elevation of thick alluvium, in order to the water level lower than the trough bottom excavation, reduce water gushing water and soil trough excavation, improve the stability of the soil, so that the soil consolidation, to prevent the work surface collapse, Which laid the foundation for the smooth and safe construction of the open channel of inclined shaft, and provided the reference for the construction of the wellbore under similar conditions.

Taking the 3下1001 material lane of Fucun Coal Mine as the research object, throughing observation of the top rock formation of the roadway, and combining the engineering geological conditions of the roadway, the completeness of roadway roof is initially determined and it is affected by the mining damage of the 3上 seam. The factors influencing the stability of the roadway are analyzed in detail. The repair and support method of the 3下1001 material roadways is proposed. On-site construction achieves better results and deformation has been effectively controlled.

In order to improve the recovery rate of coal resources, extend the service life of mine, reduce the tunneling rate, gob-side entry retaining with flexible-formwork concrete was brought in the haulage gateway of 21404 working face by Chengjiao mine, to study the stress distribution and deformation properties of surrounding rock and the technology of surrounding rock control of gob-side entry in the case of fast forward of medium thick coal seam.The results show that: Tunnel of medium thick coal seam was kept by gob-side entry retaining technology with flexible-formwork concrete, stress concentration area located in the rear of working face within 50 meters,where deformate sharply;stress of surrounding rock is the largest at 25 meters in the rear of working face,where fall rate is fastest; outside behind working face roof 80 meters, where the roof is stable. Through taking measures of supplement support for roof and coal pillar, taking measures of temporary support for retaining roadway, improving overall strength of roadway roof, the separation and subsidence of overlying strata can be reduced.

Aiming at the problem of severe deformation of 500 main roadway in Caocun Coal Mine influenced by dynamic pressure, the key factors of soft rock roadway damage were analyzed and the deformation mechanism was studied with the methods of theoretical analysis, numerical simulation and field measurement. The results show that the dynamic pressure can break the balance of the original stress and increase the main stress in the surrounding rock, resulting in the imbalance of rock strength & stress in elastic-plastic boundary. The transfer of the boundary to the deep lead to the increase of the rock failure scope and the weakening of the bearing capacity. The control concept and strengthening plan of surrounding rock under dynamic pressure were put forward. Pressure observation shows that the amount and speed of surrounding rock deformation decrease significantly, and the roadway deformation during dynamic pressure is obviously controlled.

Based on the geological conditions of F16-3 fault in the 16061 bottom lane of Jiulishan mine, the rock stratum in the fault area was extremely broken and the fissure was relatively developed, and there was a great water inrush risk in the course of excavation. Combined with the situation of the mine, the location and occurrence of the fault were determined by arranging the detecting boreholes, and used separate holes and alternate grouting methods to control the fault. The tunnel was constructed by "short injection, short excavation, first injection and excavation". The results showed that: the water inflow from the borehole was reduced to 0.003~0.30m3/min after grouting, thus effectively reducing the water inflow in the roadway. The water pressure of aquifer decreased from 3.5MPa to 0.6~1.3MPa, which greatly improved the hydrogeological conditions of the area. With the construction method of "10m injection 5m", no water inrush accident occured in the roadway, and the roadway has better stability.

In terms of the supports failure problem when the working face No. 206 advanced the bottom of the connection roadway retained in overlying barrier pillar between panels in the 12down coal seam in Huojitu colliery of Daliuta coal mine in Shendong mining area, theoretical analysis and similar simulation were applied in this manuscript to study the mechanism of supports failure in the head of fully mechanized caving face in lower slice. The research result indicated that the main roof was broken in the shape of ‘vertical O-X’ after the higher slice mined and the stable hinged structure of arc triangular block was formed in the side of mining roadway. While when the fully mechanized caving face in lower slice advanced the bottom of the connection roadway retained in overlying barrier pillar between panels, the existences of connection roadway and surrounding rock mass plastic zone made the effective bearing area of arc triangular block supported by coal body declined dramatically. Under the impact of overlying load, the stable hinged voussior beam structure of arc triangular block became cantilever beam structure after sliding instability, and meanwhile the overlying load inflicted on supports in the head of the working face No. 206 of the 12 upper coal seam therewith increased, which caused supports failure accident. This is the primary reason for the occurrence of supports failure when the lower slice advanced the bottom of the connection roadway retained in overlying barrier pillar between panels. Based on this, some measures, like intensifying the supporting intensity and increasing the density and strength of seine in the head, optimizing the layout of roadways were proposed to guarantee the production security. The research result can provide reference to the high yield and high efficiency productivity under the similar mining conditions in shallow coal seams.

Combined with the actual situation of Jinda Coal Mine after the merger and reorganization, the geological structure, coal seam occurrence, coal seam thickness and hardness, coal seam structure, roof and floor conditions, etc. of the mine are analyzed, and the 10105 working face is finally determined to be more suitable for fully mechanized top coal caving mining. The technological parameters of fully mechanized top coal caving in 10105 working face are studied, including shearer cutting height and mining-caving ratio, caving step and shearer cutting depth, initial caving step, caving method, end caving and end caving. The results show that fully mechanized top-coal caving mining is more conducive to the safe and efficient mining of the mine, is conducive to improving the recovery of coal resources, can provide a reference for similar occurrence of coal seam mining methods.

In order to strengthen the gas control of the 1301 (upper) coal mining face of Hudi Coal Industry, an L-shaped well was designed and implemented to extract the gas that gathers in goaf. The L-shaped well extraction process and drainage effect were analyzed and evaluated. The results show that: (1) the best location of L-shaped well is 9-12 times higher than the 3# coal seam; (2) the L-shaped well arrangement angle should be consistent with the coal seam inclination and be placed in the same layer as much as possible to avoid hole collapsing; (3) the L-shaped well should maintain a certain distance from the return air lane, and the optimal distance is 40-70m; (4) the L-shaped well can effectively reduce the gas concentration in the upper corner and the return flow of the working face, and the gas drainage effect is significant. The research results provide a good foundation and reference for the future design and construction of L-shaped wells.

In order to solve the problem of difficult to cope with the disaster of the multi-hazard coupled mine, the recovery of the working face is difficult. In the multi-research, respect for science on the basis of the relevant experts fully demonstrated, to develop a " Sub-unsealed, one by one lock the wind, nitrogen injection, steady progress " the post-disaster management program to make up for high gas, Impact of multi-hazard coupling work surface accident after the rapid restoration of governance technology gaps. This paper describes the water sealing roadway lock air unsealed, large flow of nitrogen injection, closed area gas pre-pumping, differential pressure on-line monitoring, combined strong support technology and other negative pressure ventilation before the disaster management technology and the total negative pressure ventilation Windshield pressure technology, and a detailed description of the unsealed process for similar mine disaster recovery to provide a successful experience. The results show that the technology can be used to realize the rapid restoration of the disaster-free working face and provide important guarantee for the early safety and restoration of the working face.

In order to improve the ash and yield of coking coal in Fangezhuang coal mine, according to the differences in the characteristics and plasticity of self-produced coal and preferred foreign coal, on the premise of meet the plasticity index of coking coal, the plasticity index and petrofacies of blending coal were analyzed, the results showed that when the target ash was 11%, blending with same types was best for Mengnanzhuang fat coal, that can improve the yield of self-produced cleaned coal by 7.88%, blending with different types was best for Outer-Mongolia 4 # coal, that can improve the yield of self-produced cleaned coal by 4.90%, the mixed coal meets the index of simple mixed fat coal, the effect was remarkable.

Abstract: CFB boiler power generation with coal slime based on pipeline transportation is the best way to utilize coal slime. However, the pipeline transportation of coal slime has large resistance and no-far transportation distance, which is difficult to meet the needs of the future coal industry towards the integration of coal and electricity. It is urgent to reduce the transportation resistance of coal slurry pipelines and increase the transportation distance. Co-firing coal slime has an impact on CFB boiler performance, and the problems of incomplete and unsystematic understanding of which by engineers are prominent. In view of the above problems, this paper puts forward that the characteristics of slip layer are the key factors affecting the transportation resistance of coal slurry pipelines. A sliding drag reduction effect testing device was designed, the relationship between transport resistance and sliding layer thickness was revealed, and the recommended value of sliding layer thickness for engineering application was put forward. The influence of coal slime mixing on CFB boiler operation performance is summarized from eight aspects, such as bed temperature, bed pressure and boiler efficiency, which provided a theoretical reference for the technology application of Co-firing coal slime for CFB boilers in power plants.

Based on the theory of mine pressure, calculation model of fault tectonic stress and abutment pressure of mined out area are constructed. Taking a rock burst mine as an example, the stress distribution of coal pillar with irregular faults under the control of thick hard rock strata is obtained by superposition of both of them, and then, the burst hazard is analyzed. The results show that the peak value of stress is 133m away from the goaf, reaching 62MPa, and the west side of the goaf 75~239m is the impact danger zone, while the east side is 65~239m. Incomplete fracture of high key stratum is the main reason for the increase of abutment pressure. The calculation results are verified by field monitoring data, and the results can be used as the theoretical basis for the prevention and control of burst hazards.

Based on the special conditions of the near-vertical coal seam and the technical conditions of horizontal sectional mining, a mechanical model of the clamping beam is established, a brief analysis is made on the dynamic and dynamic capacity of the induced impact. Based on the analysis results, the dynamic response characteristics of coal stress, displacement and other dynamic characteristics of the working face of near-vertical strata under dynamic load are studied by means of FLAC3D, the mechanism of rock-burst is revealed. Results show that the mining field is affected by the vibration of the external rock mass under static load stability, the mining face below horizontal stress instantaneous sharply lower after rising first, vertical displacement has increased suddenly, its balance is broken, cause rock-burst. The research results show the impact mechanism and the prevention and control of the horizontal sectional mining of near-vertical coal seam.

Abstract: In this paper, three gap 85201 large mining height coal mine as the background, through the theoretical analysis, numerical simulation method, the mechanism of large mining height are broken coal wall slope is analyzed, and the mining height are broken, the strength of the supporting, advancing speed for the impact of large mining height are broken coal wall for numerical simulation research, and puts forward the corresponding countermeasures according to the results of the study to further increase the coal wall stability.

Coal and gas outburst is a dynamic phenomenon influenced by many factors. Using the theory of risk interface, risk factors are divided into two parts with the risk of outburst source and it of countermeasure against outburst. Each part is divided into three parts, and that risks always exist on the interface, which interface the failure will be dangerous energy into the accident. A fishbone diagram identifying risk factors in coal and gas outburst process was given according to this theory. The results show that the probability of turning into an accident is extremely high due to frequent interaction between the dangerous energy carriers of coal and gas outburst.

In order to improve the parameters’ accuracy and speed in dewatering test,based on the similarity of hydrogeological parameters’ calculation in pumping test and dewatering test at coalbed floor, Aquifer Test software that used usually in pumping test was applied in one dewatering test at coalbed floor carried out in a colliery of Ningdong county. Through Theis fitting curve, Cooper-Jacob linear graphic and Theis recovery, hydraulic conductivity K and storage coefficient μ*were calculated and compared between Aquifer test and traditional handwork. Results showed that there was a slight difference of the results between two ways, but the results from handwork were relatively discrete. By contrast, due the Aquifer Test incorporated the advantages of hand fitting and computer fitting, led to a more precise result. Meanwhile, the software is more convenient in operation, simultaneous and time-saving in calculation and it’s worth to be promoted and applied in the hydrogeological parameters’ calculation of dewatering test at coalbed floor, especially in which there are many observation boreholes.

In order to study the law of the characteristic stress of northern artificial frozen red sandstone, the frozen triaxial compression test system was used in the test of frozen red sandstone under different temperatures (-15℃, -10℃, -5℃ and 10℃) and confining pressures (4MPa, 8MPa and 12MPa) and the stress thresholds of stress-strain curves are statistically analyzed. The study found that: When the temperature increases, the crack initiation stress increases firstly and then decreases, but crack damage stress and peak stress decrease. when the confining pressure increases, the crack initiation stress, crack damage stress and peak stress increase. The ratio of crack initiation stress to peak stress and crack damage stress to peak stress decrease with the increase of confining pressure. The ratio of crack initiation stress to peak stress is widely range from 0.373 to 0.721, and the ratio of crack damage stress to peak strength is concentrated around 0.9. The elastic strain energy accounts for 69.79% ~ 98.51% of the strain energy, and the dissipation energy is small. After the peak point, the failure of the specimen leads the sharp decrease of elastic strain energy and the sharp increase dissipation energy.

The freezing technology for constructing deep shafts and long inclined shafts is always a key and difficult point in mine construction on complex geological conditions. The construction of shafts with complex engineering specifications in areas with deep, complex formation conditions needs to use freezing process in alluvium of thousands of meters thick. To obtain the physical and mechanical parameters of frozen soil in deep alluvium, undisturbed soil samples were collected at ten horizons (-193m~-624m) at the construction site. Then, the physical and mechanical parameters of the remolded frozen soils at the ten horizons were detected in the laboratory. The experiment showed that at the same freezing temperature, the frozen soil at the second horizon showed the largest frozen-heave force, followed by that of the eighth horizon, while the lowest frozen-heave force was observed at the ninth horizon. After being frozen, the soil at the fifth horizon presented the highest uniaxial compressive strength and desirable freezing stability of the formation. In comparison, the frozen soil at the eighth horizon exhibited the lowest uniaxial compressive strength and poor freezing stability of the formation. The cohesion of the soils at the fourth to sixth horizons was sensitive to the influences of freezing temperature. After being frozen at -15°C, the clay at the third to fifth horizons had relatively larger shear creep deformation while being sheared under different constant stresses. Meanwhile, structural characteristics and moisture content of the soil in the formation, temperature, stress and time are key factors influencing the strength of the frozen soil. The research results can be directly used to guide the design and construction of frozen walls of shafts to improve the design and construction quality.

Aalysis of the coal mining under complex conditions, Hydraulic support posture space variable by the coupling effect of driving spatial variables and pose solution of application problems, put forward using BP neural network to build the pose space to nonlinear drive space conversion model, can quickly realize the kinematics calculation, and real-time detection of hydraulic support posture. The experimental results show that the method of pose control stent compared with traditional methods, quickly and accurately, improve work efficiency, theory support for supporting a branch of perception and attitude control with machine control.

This paper describes the development status of sizing crusher technology in China. The overall structure is basically mature. The wear-resistant material almost has the same property of foreign products. The reliability of key components has been significantly improved, and the control system has been continuously improved. Besides, the paper analyzed the technical similarities and differences between domestic and foreign sizing crusher equipment from the aspects of serialization, cavity structure, size adjustment, and tooth structure. Finally, the technological research focus of sizing crusher of the virtual crushing test and advanced design method was proposed.

A path planning and optimization method based on particle swarm optimization (PSO) is proposed for trajectory planning of unstructured, uncertain and complex unknown environment in coal mine. The establishment of dynamic model of robot, the key point control of robot kinematics constraints into three spline interpolation curve constraint nonlinear constrained optimization problem, using three order polynomial interpolation curve by combining particle swarm algorithm and penalty function method, using adaptive interpolation function to control convergence speed, get a satisfying real time optimal trajectory the requirements of working condition. The results show that this method has effectively solved the optimization of robot time optimal trajectory in the complex environment of coal mine.

In order to study the storage pattern of mositure in lignite, the adsorption mechanism of water polymer on lignite molecular surface was studied by density functional theory. Adsorption energy, Reduced density gradient(RDG), Atoms in Molecule(AIM) and Energy decomposition analysis(EDA) of the optimized adsorption configurations were calculated. The results show that: water polymer adsorbed on lignite molecular surface mainly via hydrogen bond, and van der Waals forces make little contribution to the adsorption. Carboxyl and hydroxyl functional group in lignite provide the primary adsorption sites. More hydrogen bonds formed between water polymer and lignite molecule, and adsorption energy of water polymer on lignite is larger than that of single water. Water molecule adsorbed on lignite to form equilibrium configuration under the effect of repulsive and attractive interaction, and electrostatic interaction plays a dominant role in the attractive interactions.

In order to understand the trajectory of the screen in space clearly, according to the rigid body dynamics theory, the trajectory equation of the mesh in space was deduced. With the help of virtual prototyping technique and the virtual prototyping technology, the trajectories of the points on mesh were simulated. When the exciting forces do not pass through the body’s centroid and are placed on both sides of the body, the movement of arbitrary point on the mesh is the synthetic motion combined with translation along coordinate axis and the rotation around this axis. Through adjusting the relative position between polarized block and the centroid of the vibrating screen, the arbitrary point on mesh was moved like an ellipse with ellipticities unequal to each other, and the amplitude of screen at the entrance reached 2mm, which is conducive to material stratification.

In order to illustrate the performance characteristics of two commonly used vibrating feeders in coal ports in our country, this paper starts with the analysis of the force on the vibrating bed by particles, and obtains the demarcation point of skidding, jumping and quiescence. By using analytical and geometric methods, According to the actual structure size of the feeder, the maximum feed particle size, the maximum feeding amount, geometric angle of rest and power efficiency, area efficiency and volumetric efficiency were found out. For the majority of users on the feeder selection and use provides a more detailed theoretical basis.

In order to solve the current thermal power plant coal supply shortages, coal prices remain high status quo. In this paper, the optimal coal blending for pre-fired coal is studied through the actual use of coal in the power plant. The plan establishes a coal blending mathematical model that uses the minimum cost of blended coal as the objective function and the unit's requirements for the industrial components of the blended coal as a constraint to use the particle swarm. The local fast convergence feature of the algorithm is optimized by genetic algorithm to solve the model. The non-linear mapping relationship between the industrial components of the single coal blend coal quality is predicted by establishing a GA-BP neural network prediction model. Through the analysis of examples and error results, it is proved that this method can predict and solve the reliability of coal blending with the lowest cost.

Climate change caused by a large number of greenhouse gas emissions has become a global environmental problem. Coal chemical industry as one of the major CO2 emissions industry, it’s CO2 emissions of 2015 accounted for about 4.1% of China. So it’s essential to study the carbon reduction of coal chemical industry for achieve country’s goal about 40~45%. CO2 emissions is accounted based on the commonly used methods and elected the measured emission factor of coal chemical industry in 2005~2015.Then, three kinds of development scenarios were set up used scenarios analysis,the carbon emissions and intensity of the coal chemical industry in 2020 is predicted by adjusting the product structure. The results show that the CO2 emissions of coal chemical industry increased by 8.12% in 2005~2015;With first, second, third scenario, CO2 emissions and intensity increased in turn; Only first scenario reduction potential is positive, second and third scenario are all negative in 2020.The research indicating that only the product structure was adjusted ,the potential of coal chemical industry could not be improved. So, we need to combine various mitigation measures,such as improving energy efficeny, increasing the ratio of clean technology and match carbonization technology to enhance reduction potential.

For permanent magnet coupling, the copper conductorplate is usually slotless. Based on the fact that the eddy-current of the radial path in the slotless conductor plays a major role in torque transmission performance,a new permanent magnet eddy-current coupling’sstructureis proposed,in which the conductor plate is slotted and the yoke is filled in the slot.On the basis of the original 40kW permanent magnetic coupler, the finiteelementmodel of slotted conductor plate is built and simulated by using Ansoft Maxwell.Compared with the analysis results without slot ,the magnetic induction intensity ,the eddy-current distribution of the air gap magnetic field are discussed.The results show that the magnetic induction of the surface position of the yoke is obviously increased,and the magnetic field between the air gap and the copper spoke is strengthened.Furthermore, the magnetic flux density, eddy current distribution and eddy current loss density diagram under different conditions of slotting angles ,slotting quantities and slotting lengths indicate that sizes of the slot have significant effect on the transmission torque .The results show that the structure of the conductor plate is slotted obtains the the greater transmission torque than the structure without slot .

With the continuous improvement of mechanization degree of coal mine, the original flameproof diesel engine which are equipped with mechanical fuel injection pumps can not satisfy the requirements of the coal mine, in this context, flameproof electronic control diesel engine emerge at the historic moment. In this paper, the selection of the control form of the flameproof electronic control diesel engine and some advantages of its own are described; Through the application of coal mine underground, some problems in the application of flameproof electric control diesel engine are analyzed and the corresponding improvement measures are taken. The applicable conditions of the flameproof electronic control diesel engine and its application prospect in China are put forward.

This paper summarizes the necessity of designing organizational structure adjustment in EPC mode. It compares the advantages and disadvantages of the three commonly used design organizational structure model, and finds the advantages that the matrix structure compared to the functional and project-oriented design organizational structure. It gives the countermeasures and suggestions of some problems in the process of the matrix structure.

In 2014, China’s government carried out coal resource tax reform from quantity-based tax to ad valorem tax. Therefore, it is necessary to quantify the impact of resource tax on coal sector and national economy. In this paper, a recursive dynamic computable general equilibrium model is applied to simulate the social and economic impacts of different tax rates. The results show that from the perspective of national economy, the ad valorem coal resource tax will impose negative effect on GDP, and its magnitude will be strengthened with a higher tax rate. From sectoral level, the results show that the coal mining sector is mostly affected among various sectors, in terms of both output and profit. Especially in the high-tax rate scenario, the impact on coal sector is extremely significant. Therefore, it is not appropriate to set a high tax rate as soon as implementing coal resource tax, and proper measures aiming at protecting coal sector and sectors with high coal consumption should also be implemented.

The tax equity of coal sector directly affects its healthy development. Therefore, through data collection, treatment and analysis, this paper explores the operating losses of China's coal mining sector and domestic energy-related industrial sectors, the comprehensive tax rate of turnover tax, and the tax burden structure, and then it analyzes the equity problem of taxation of coal sector in China. The results show that at present, China's coal sector bears a high tax burden compared with other sectors, and the coal sector has experienced unequal competition in the development process. Therefore, it is necessary to insist on the principle of tax equity, reduce the tax burden of coal sector and adjust the tax burden structure to promote the healthy and sustainable development of coal sector in China.