Abstact: In order to solve the safe mining problem of 1501 working face under the goaf of extremely close coal seam in Zhunnan Coal Mine, the roadway position and support mode of 1501 working face were studied by means of theoretical calculation, numerical simulation and field measurement.The results show that in order to effectively avoid the influence of residual pillars in the upper goaf, the reasonable horizontal staggered distance between the 1501 mining roadway and the upper residual pillars is 9 m; and aiming at the stress distribution law, rock thickness and mechanical properties of the floor of the goaf in the very close coal seam, the roadway supporting countermeasures and supporting schemes are put forward; during the mining process of 1501 working face, the maximum relative displacement of the roof and floor of the roadway is 222.5 mm.,and the maximum relative displacement of the two sides is 151 mm, and there is no collapse of shed legs, roof fall and side slice in the roadway. The safe mining is realized in the working face.

According to the geological features of protective marginal coal pillar under the dongping village, the feasibility and adaptability of the mining of marginal coal pillar by using the short wall mining technology of continuous coal mining machine were analyzed. According to the regional conditions of the first mining face, the technical scheme of the mining method is designed, including the roadway layout, mining process, mining matching of the working face, ventilation system. The practice shows that the technology of short wall mining has achieved good economic and social benefits in dongping coal mine, which provides valuable time for the sustainable development and diversion of production.

This paper analyzes the shortcomings of the current 2D CAD design in the coal industry, the advantages of 3D collaborative design based on BIM technology, the characteristics of mainstream 3D and BIM software, and uses the Bentley series of software to explore the 3D collaborative design of Zhangjiamao mine. The paper combs the principles and processes of 3D collaborative design, and points out the feasibility and existing problems of 3D collaborative design in mine engineering. The related research and experience can provide reference for the application and popularization of 3D collaborative design in mine engineering.

In order to solve that the phenomenon of roadway Floor heave, wall heave, in a coal mine in the northern mining area of Ordos coalfield comprehensive face wind back tunnel, caused by impact pressure，a kind of anti-impact advance hydraulic support was designed. Based on the actual conditions of the roadway, the main technical parameters of the scaffold are determined by theoretical calculation and the analysis of the measured results. By observing the actual use of the site, the anti-impact leading hydraulic support can effectively solve the phenomenon of roadway bottom drum and drum, reduce the incidence of safety accidents, protect the safety of operators and equipment, and provide a new type of technical reference for roadway leading support.

Abstract: The coal transportation line in the late mining area of Datong Tashan Mine is 13km long. The long transport route and more links resulting in reduced reliability of the transportation system. To solve the problem of mine coal cache, five oblique coal bunkers are arranged on the west side of the +1070m horizontal tape lane. Each coal bunk is 10m in diameter, the angle of inclination is 60° and the vertical height is 46m. The inclined coal bunker is constructed by the reverse well drilling rig, which reduces the construction period. The design and construction of the oblique bunker system has realized the purpose of coal buffering, improved the management efficiency of auxiliary transportation and the reliability of coal transportation system. It has reference significance for the design and construction of similar large-capacity buffered inclined coal bunker.

The data of Coal mine enterprises software and equipments have been daily increasing at TB level. Such massive data promotes coal mine enterprises to enter the era of big data. Aiming to solve the problem that coal mine enterprises cannot use these data efficiently better, a Hadoop based analysis and management platform for big data of coal mine enterprises is proposed, the enterprise resource system data and equipment monitoring status data are integrated and a special model suitable for coal mine enterprise big data is established. The platform uses distributed technology to store and process data and visualize the processing results, and design and develop data management system prototypes based on actual needs. The results show that the proposed platform can realize the integration of massive data of coal mine enterprises, which breaks the “information island” inside the enterprise, realize the efficient sharing and utilizing of data, reduce the failure rate of equipment, improve the operation and maintenance efficiency of coal mine enterprises.

In order to study the gas production potential of low-rank coal reservoirs,taking No. 4 coal reservoir of Dafosi Minefield in Binchang Mining Area as an example, the indexes of critical desorption pressure-reservoir pressure difference, critical desorption pressure-abandonment pressure difference, effective desorption quantity and desorption efficiency are quoted, and combined with the characteristics of low-rank coal reservoirs, such as low gas content, large thickness and good permeability, the numerical simulation software of coalbed methane is applied to low-rank coal reservoirs. Quantitative evaluation of reservoir gas production potential is carried out. The results indicates that the critical desorption pressure-reservoir pressure difference of No. 4 coal reservoir in Dafosi Minefield is 1.27 MPa, the critical desorption pressure-abandonment pressure difference is 0.76 MPa~1.26 MPa, the effective desorption quantity is 1.25 m3/t~2.35 m3/t，the desorption efficiency is 1.99~2.46 m3/(t×MPa),which is lower than that of medium and high rank coal reservoirs, but because of the thickness and permeability of No. 4 coal seam is large, the numerical model of extraction is drawn. It is proposed to show that the average daily gas production in 5 years is 965 m3, which has the gas production potential of CBM wells with industrial gas flow. The field single well drainage and production practice also verifies the reliability of quantitative evaluation results of No. 4 coal seam. The paper considers that the indexes of coal seam thickness and permeability should be included in the quantitative evaluation index system of low-rank coal reservoirs.

In view of the large error of single geophysical parameters, the poor effect of single geophysical Prospecting method and the insufficiency of multi-solution of inversion results, a multi-parameter comprehensive geophysical Prospecting method is proposed to explore the distribution and status of No. 5-1 coal seam goaf in Zhongneng Yi'an Coal Mine in the Jurassic Coalfield of Northern Shaanxi, and the distribution and occurrence of the inner goaf of the exploration area is basically identified by geophysical verification combined with drilling exploration, which provide a reference for the disaster control of the goaf.

Due to the limitation of geological conditions and engineering conditions, some roadways in coal mine can not avoid unstable rock formations and need to be constructed in unstable rock formations. In this paper, under the conditions of large deformation of roadway, long time of bottom dropsy and mine pressure, the soft and broken position of rock surrounding a mine substation is discovered. It is proposed to use grouting anchor to reinforce unstable surrounding rock with anti-suspension arch to control the bottom dropsy, improve the overall bearing capacity of roadway surrounding rock, ensure the effect of chamber support, and reduce the maintenance cost in the later period of chamber.

Based on the engineering background of 62310 return air alley in Xinzhuangzi Coal Mine, this paper introduces the selection and filling process of original road filling materials. The theoretical analysis method analyzes the surrounding rock control of no coal pillar tunneling, using high-strength anchors and anchor cables. The combined support of hollow grouting anchor cable and steel mesh, select reasonable filling wall strength and width, effectively control the surrounding rock deformation and roof separation layer without coal pillar roadway. Using the field measurement method, the actual measurement is carried out in the 1400 m roadway, and the deformation of the roadway roof is between 30 mm and 50 mm, the roof separation is less than 20 mm, and the deformation of the roadway is 40 mm to 50 mm. Between the observations, the roadway support effect is good, and the surrounding rock deformation of the roadway is effectively controlled.

In order to solve serious deformation and failure problem of high stress roadway in deep coal mine, combining with powerful support theory and the relationship between time-dependent deformation and support time of surrounding rock, the powerful and multi support mechanical mechanism of roadway in deep coal mine was analyzed. And the powerful and multi support technology of the primary bolting and guniting support coordinating with the second fullface anchoring + grouting and floor birdcage anchors support was provided. Then the deformation of roadway surrounding rock was controllable in field application. The results show that: the deformation velocity of surrounding rock reduces first, and then changes slowed down, and suddenly increases finally, the second optimum support time is at the slowed down period of the deformation velocity for surrounding rock.

In order to determine the maximum chassis resistance line in the step blasting of the Barun mine, ANSYS/DYNA numerical simulation was used to simulate four sets of models with different chassis resistance lines of 1200cm, 1150cm, 1100cm and 1050cm, and the bottom line of the slope was analyzed according to whether the rock was broken. Whether the stress value of the continuous unit reaches the yield strength of the rock, the maximum chassis resistance line value is 1150 cm, and it has been verified by field industrial tests. The actual working conditions show that the simulation results show that the chassis resistance line is 1150cm, and the bottom plate is flat after blasting. There is no obvious foundation, which meets the mining requirements of the mining equipment, and it is feasible in the Barrun mine.

Abstract: Traditional mine transient electromagnetic advanced detection technology has volume effect. The technology can only detect the position of watery goaf, but it is difficult to accurately detect watery boundary of the goaf. In order to accurately detect the distribution and watery boundary of goaf in front of 9101 roadway, advanced detetion data was processed by wave field imaging system based on mine transient electromagnetic method. The results showed that watery boundary position of the watery goaf can be delimited by wave field imaging system, The amplitude of the wave field curve corresponds well to the position of the watery goaf. The boundary position of the watery goaf is more consistent with the wave field imaging results.

Abstract: To solve the problem of strong pressure appearing in large mining height working face caused by the close-distance overlying double hard strata are fractured, information about the 30201 working face of Muduchaideng Coal Mine extracted, the structural model of broken strata is analyzed. It shows that the close-distance first hard strata is the key to induce strong pressure in the large mining height working face. Hydraulic fracturing technology applied into the close-distance first hard rock strata, the length and integrality of the "cantilever structure" controlled, the static load grade of working face is reduced, and meanwhile the transmission way of the dynamic load is changed when the upper "articulated structure" is unstable, so as to reduce the degree of the strong pressure appearing in large mining height working face. The microseismic monitoring technology is used to check the effect of pressure relief. The microseismic system monitoring shows that the energy and frequency of microseismic vibration are greatly reduced after the above measures are taken, which indicates that the pressure relief measures are effective in weakening the appearance of strong rock pressure in the working face.

Taking the frequent occurrence of rock burst in No. 17 coal seam of Junde Coal Mine as the engineering background, and combining with the "11.14" rock burst accident, the impact risk of the second section of No. 3, No. 17, No. 34 area in the north of the third level was studied in depth. The results show that three days before the 11.14 rock burst accident, there is a small fluctuation process of "rise-fall" of the energy of the mine tremor; the core area of the energy density cloud has begun to appear before the impact, and the core area is located on the top of the working face; the numerical simulation and theoretical analysis results verify that the leading section of the working face is easy to form a high concentrated static load because of the stress superposition. Under the action of dynamic load disturbance caused by mining, rock burst accident finally occurred. The research results provide some reference for pressure relief and scour prevention in the following mining stage of inclined coal seam face.

The problem that the roof of the curved triangular area at the end of the mining face is too long, Threats to the safe and efficient production of the mining face, At present, the problem of roof hanging is mainly solved by means of pre-cracking blasting. Due to the ban of pyrotechnics in the goaf of high gas mines, the use of this method is limited. Based on this problem, the static-oriented rock breaking technology is developed to solve the problem of excessive roof hanging of coal mine head roadway. Through the static fracture agent expansion mechanical properties test, the factors affecting the expansion pressure of the crushing agent are analyzed. Based on the test results, the expansion pressure of the static breaker is mainly affected by the water-cement ratio of the slurry and the borehole diameter, and the expansion pressure of the slurry will gradually increase as the ratio of the water-cement ratio of the slurry decreases and the pore diameter increases. Taking into account the fluidity of the slurry, it is determined that the optimum water-cement ratio of the static crusher in industrial applications should be controlled between 0.2 and 0.35. Based on the elastic mechanics and rock mechanics analysis of the cracking principle of rock under porous pressure, the principal stress surface between the boreholes is the axial plane between the holes, the expansion of the unit crack is related to the magnitude of the expansion pressure, and the point is related to the position of the hole core.. Relatedly, increasing the aperture or reducing the hole pitch can effectively promote the crack propagation; According to the specific engineering geological conditions, combined with the static crusher expansion mechanics test and the analysis results of the rock cracking principle under porous pressure, the concrete design of the construction scheme is carried out, The specific operation methods and steps of using the principle of “three tubes, two inputs and one return” during static grouting construction are discussed. The field application results show that after applying the static rock breaking technology to solve the suspended roof problem of the end roadway, the length of the suspended roof of the end roadway is reduced by 36%, and the effect is significant to ensure the safe and efficient production of the mining face.

Taking 1007 working face of Fucun Coal Mine as the background, the key technology of pre-excavating retreat passage is studied through numerical simulation and field measurement. Through numerical simulation analysis of surrounding rock deformation at different distances between the withdrawal passage and the fault, it is determined that when the withdrawal passage is 3 m away from the fault surface, the roadway is less affected by the dynamic pressure of the working face, and the support parameters of the withdrawal passage are determined. Through monitoring the displacement of roof and floor and two sides of roadway, it is proved that the supporting scheme is feasible and can meet the requirements of support withdrawal.

With the improvement of mechanization, the content of slime in raw coal is increasing. There are some problems in most coal preparation plants, such as low separation accuracy of coarse slime and serious tailings running away from coal. Through screening test and interference bed separation test of raw coal with large slime volume, the difference of interference settling state of coarse slime with different particle size is analyzed. At the same time, aiming at the limitation of traditional jamming bed sorting, the technical route of twice sorting to improve the accuracy is put forward, and a three-product jamming bed testing machine is developed. The results of industrial practice show that the separation accuracy of coarse slime is greatly improved after three-product interference bed separation, and the ash content of coarse and concentrate products is reduced by 3%. At the same time, the tailings are effectively avoided and the recovery rate of concentrate is improved.

After coal mining depth increase face lengthened, the strata control the increasingly prominent contradiction, production practice, the frequency, a wide range of support crushing is not only bring hidden trouble to safety production and cause serious economic losses, through theoretical analysis, analog simulation, field test and verify, on long island coal face of deep strata caving structure characteristics and the corresponding law of mine pressure appear is studied; It is considered that the fracture form of the main roof in goaf is closely related to the aspect ratio of working face, and the main roof usually forms a vertical "X" shape failure under the condition of overlong working face. By establishing a similar model, the relation between overburden caving form and subsidence curve and working face length is analyzed, and it is concluded that with the increase of working face length, the working face tendency is easy to form masonry beam structure, which makes it possible for the working face tendency to have two or more pressure peaks. Field observation shows that the main roof in the middle of the overlong working face is not broken off at one time, but broken off in different areas in the direction of inclination, showing an articulated state. Taking the 15106 super-long island working face of Sijiazhuang mine as an example, the overburden caving structure and the law of ore pressure show are analyzed, the field measurement is consistent with the theory and similar simulation analysis, which provides a theoretical basis for studying the overburden caving structure characteristics of the deep super-long working face.

According to the difficult problem of stability control of mining roadway by repeated mining in steeply inclined coal seam, taking the typical mining roadway in steeply inclined coal seam as the engineering background, the in-situ monitoring, the numerical simulation and the similar simulation experiment are synthetically used to analyze the surrounding rock deformation and failure of roadway by repeated mining in steeply inclined coal seam. The results show that the deformation and failure of roadway surrounding rock is asymmetric under the effect of repeated mining, which is a complex time-space problem. Based on this, the support principle of "active support and strengthening control of key parts" is put forward, and the non-symmetrical coupling support method of strong bolt + long anchor rope + W steel belt + steel mesh is adopted to effectively control the roadway deformation and failure. The research results can provide reference for solving the roadway support problem of steeply inclined coal seam.

Based on the analysis of the characteristics of fracture development and tectonic stress evolution in Baode coal mine, the fracture development direction of coal seam in the three panel of Baode coal mine is obtained. After retrieving the large coal briquettes on site and drilling the coal sample at different angles with the direction of fracture, the permeability variation rule under different conditions was tested and analyzed. The results show that when the sampling angle is parallel to the direction of fracture development, the permeability of coal is the largest. When the sampling angle is perpendicular to the direction of fracture development, the permeability of coal is the minimum. With the increase of the angle, the permeability of coal decreases gradually. This phenomenon indicates that the drilling hole should be perpendicular to the direction of fracture development, so that gas flows directly into the drilling hole along the fracture. Four groups of test drainage boreholes were arranged on the 81310 working face of Baode coal mine, making the included angles of boreholes and fracture direction are 30, 45, 60 and 90° respectively. The effect of extraction shows that the drainage effect of drainage boreholes in different directions is different. When the included Angle is 90°, the actual drainage effect of gas drainage boreholes is the best, and the drilling arrangement is the optimal plan.

Abstract: In order to determine the influence extent of multi-factor coupling on coal spontaneous combustion danger, a comprehensive assessment was applied to the danger of coal spontaneous combustion based on the structural equation model which was set coupling the principle of system engineering. Through literature research, integrated the characteristics of coal spontaneous combustion, based on the theory of system engineering, the danger factors affecting coal spontaneous combustion were determined with an establishment of evaluation index system on the coal spontaneous combustion danger and a construction of structural equation model to determine the weight of each index. According to index system, a comprehensive evaluation on the danger of coal spontaneous combustion was carried out to a coalmine in Ningxia, the result of which coincides with site condition, demonstrating the reliability of the model.

Taking the raw coal samples of Inner Mongolia lignite, Datong bituminous coal and Heilongjiang anthracite with different metamorphic degree and treated with composite inhibitory solution as test objects, the inhibition effects of composite inhibitors on three kinds of coal samples were compared through experimental measurement and dynamic analysis. The results show that the composite inhibitors can effectively inhibit the oxidation reaction of Datong bituminous coal and increase the activation energy of coal body. The inhibition effect is much higher than that of the other two coal samples.

According to the characteristics of the coal distribution of thick coal seam，layout the gas station accord with the actual situation，distribution of oxygen in the mined-out area is studied through field observations，take CO concentration as a case studies distribution of dangerous gas in the mined-out area，according to the test face physical model simplified calculation model for numerical simulation，carried out goaf spontaneous combustion dynamic numerical calculation under different working conditions.Studied the influence of key parameters of coal spontaneous combustion is crucial，including changes with time of gas inside the coal spontaneous combustion danger zone seepage velocity distribution and oxygen concentration distribution，high temperature fire point change trend， and preventing coal spontaneous combustion of coal face minimum mining speed， etc

Taking the coal seam roof sandstone in the Hexingliang mine field in the Yushen mining area in northern Shaanxi as the research object, the uniaxial compressive strength test is used to test the rock with a diameter of 50mm, an aspect ratio of 0.5 and a diameter of 70mm and an aspect ratio of 0.7. The uniaxial compression was carried out, and the effects of the post-peak failure modes of two intact rock specimens with different aspect ratios and the end restraint effect on the test results of two different aspect ratio specimens in the uniaxial compressive strength test were analyzed. It was verified that the uniaxial compressive strength of a non-standard morphological rock sample with a diameter of 70 mm and an aspect ratio of 0.7 was converted into a uniaxial compressive strength of a standard morphological rock sample with a diameter of 50 mm and an aspect ratio of 0.5. Applicability of the experience conversion formula. The test results show that under the condition of uniaxial compression, the fracture morphology of the complete specimen with 0.7-diameter height ratio is dominated by fracturing failure, while the failure mode of the complete specimen with 0.5-diameter height ratio is dominated by shear failure; At the same time, the calculated value of the 0.7-axis height ratio rock sample through the uniaxial compressive strength empirical conversion formula is greater than 0.5 diameter-height ratio in a certain range, and the measured uniaxial compressive strength value of the standard morphological rock sample; for fine sandstone, the diameter is high. When the uniaxial compressive strength value of the non-standard morphological rock sample with a ratio of 0.7 is converted to the standard uniaxial compressive strength value with an aspect ratio of 0.5, the above formula has good reliability, comparability and applicability.

The existence of unidentified goaf has induced a variety of mine geological disasters, which poses a major hidden danger to the safe production of coal mines and the safety of people's lives and property. In order to study the law of seismic wave field propagation under the unfavorable geological structure in front of the working face of the roadway, taking the goaf as an example, it is proposed to use the rayleigh channel wave to detect the goaf. Through the establishment of the "rock-coal-rock" three-layer geological model, the numerical simulation of the wavefront characteristics of the seismic advance detection is carried out, respectively, for 80ms,160ms,260ms of X (along the direction of the roadway), Y (vertical side directional direction), and Z (vertical floor direction) and seismic synthetic records of X, Y and Z components are analyzed. The results show that : when the goaf in front of the roadway is detected by seismic advance detection, Rayleigh channel wave can be used as an effective wave to identify the goaf in front of the roadway head; The Rayleigh channel wave has obvious signal characteristics, small interference, strong energy and easy identification on the X and Z components, while the Y-component signal has obvious development of the shear wave, and the Rayleigh channel wave is difficult to identify.

In order to study the effect of synchronous gear structure on the rotational speed of the tooth rollers of the sizer crusher, this paper compares the rotational speed of the tooth rollers of the sizer crusher before and after the transformation of the synchronous gear mechanism, putting forward and calculating the correlation coefficient which can characterize the rotational speed stability and synchronization of the tooth rollers. And then using high-speed photography technology to explore the motion law of the gear mechanism. The results show that the application of synchronous gear mechanism in the sizer crusher can optimize the synchronization and stability of the roll speed of the tooth rollers.

It is difficult to achieve both satisfactory concentrate yield and ash content simultaneously for hard-to-float fine coal by only rough flotation process. The results of flotation rate tests showed that concentrate reclean process increased concentrate yield of hard-to-float fine coal effectively. Flotation rate test was also conducted, results of which showed that ash content of froth increased with the flotation time, as well as the proportion of high-ash particles in the corresponding froth product. Results above demonstrate the theoretical foundation of partial-concentrate reclean process. For further demonstration, flotation experiments for the partial-concentrate reclean process were conducted, with process intensification by two stage reagent addition, and concentrate yield of 61.30% with ash 10.86% was achieved. Compared with rough flotation process, flotation efficiency was increased by 9.48%.

In order to improve the control precision of coal shearer in coal mining, a strategy based on improved artificial fish swarm algorithm for high control of Shearer drum drum is proposed. On the basis of the traditional artificial fish swarm algorithm, the strategy of step decreasing and field of view change is introduced, and the parameters of PID controller are obtained by using the inverse of ITAE as the objective function optimization. The Simulink simulation model is constructed by the transfer function of the high-speed shearer system, and compared with the simulated annealing algorithm and particle swarm algorithm, the results show that the improved artificial fish swarm algorithm has less error, more accurate control accuracy and smoother step response of the system, which provides a new method for achieving more accurate control of the shearer. It provides the basis for the efficient production of coal.

Aiming at the problem of automatic height adjustment of shearer, a shearer simulation cutting device with electro-hydraulic proportional height adjustment system was designed. The composition of the experimental device was analyzed. The NI PCIe-6323 data acquisition card and the electro-hydraulic proportional direction valve were used as the core hardware. The test & control system of shearer simulation height adjustment experimental device based on LabVIEW was constructed. The system has modules such as analog signal output, multi-channel data acquisition, real-time data display and storage. The paper carried out the hardware selection and the program design of each module of the system. The front panel and block diagram of the system were given, and the experimental verification was carried out. The experimental results show that the system can monitor the operating conditions of the experimental device in real time. The development of this system provides a platform for the experimental research of the subsequent automatic height adjustment of shearer.

Aiming at the high cost of dynamic testing of explosion-proof light-duty rubber tires in the daily maintenance of coal mines, it is difficult to realize the emission detection, and a multi-regression method for evaluating the dynamics of light-duty rubber vehicles with emission detection data is proposed. Firstly, according to the dynamic related emission factors, the explosion-proof light rubber tire emission testing equipment was selected. The multi-regression method in SPSS software was used to obtain the optimal fitting equation, and the multiple regression model of the dynamic evaluation of mining light rubber tire vehicle was established. Secondly, a dynamic evaluation test was conducted to compare the model evaluation results with the measured data of the maximum chassis dynamometer reflecting dynamics. The test results show that the smoke, nitrogen oxides and exhaust temperature are negatively correlated with the dynamics of the rubber tire, and the carbon monoxide is positively correlated with the dynamics of the rubber tire. The model can effectively evaluate the maximum chassis output power of the vehicle. The model evaluation error does not exceed ± 5%. This model can be used as a basis for evaluation of daily vehicle dynamics testing.

In recent years, there have been repeated emergencies of coal supply in the three Northeast provinces during the heating season, which has become a major regional livelihood issue. It is necessary to find the root cause and respond in many ways. The author sorts out the current coal supply pattern in the three northeastern provinces, and argued that the contradiction between supply and demand and transportation bottleneck during the peak period of winter coal use are the key issues of supply security. The author also analyzes the three major constraints of medium and long-term coal supply, namely the decline of its own production, the long-term existence of transportation bottlenecks during the peak period of winter coal use, and the limited production capacity in eastern Inner Mongolia, and then combined with the consumption of coal to predict that the external dependence of coal in the three northeastern provinces will continue to increase, and the pressure of supply will continue to exist. The countermeasures will be proposed from three aspects: improving coal production capacity in eastern Inner Mongolia, improving railway emergency dispatch capacity, and building some coal reserve distribution bases.

Taking the publication of the action plan for the prevention and control of air pollution (hereafter referred to as environmental control policy) as a quasi-natural experiment, this paper builds a synthetic control group with similar characteristics to the Beijing-Tianjin-Hebei Region as the counterfactual surrogate to study the influence on coal consumption and test the mechanism based on the difference-in-differences model. Results shows that, the environmental regulation policy has significantly reduced coal consumption in the Beijing-Tianjin-Hebei Region and the result is robust. Besides, the environmental control policy promotes the decline of regional coal consumption by optimizing industrial structure, improving scientific and technological level and energy efficiency.