Abtract: In view of above 7m large mining height fully mechanized working face mining technology in China is not mature, the Shenhua Coal Group in Bulianta coal mine 12511 (8m) of fully mechanized mining face as an example, analyzes the matching of large mining height fully mechanized face equipment 8m, staffing, work in the process of mining face defense for head and roadway technology and working face ends cutting coal transition technology, and to prevent spontaneous combustion in goaf and key technology of mine pressure, provide a reference for the similar geological conditions of fully mechanized mining working face mining.

Based on the engineering background of gob-side entry retaining with roadside backfill in panel 3602 of Nantun Colliery, the key parameters of gob-side entry retaining with roadside backfill in thin coal seams with the limestone roof (GERRB-TCS-LR) were studied. The caving style of the limestone roof during the retaining stage was analyzed based on testing the physical and mechanical properties of limestone roof in the laboratory. Considering the caving style, the roof-cutting mechanical model of gob-side entry retaining with roadside backfill was established, the roof-cutting resistance and width of the roadside backfill body were determined as the key parameters for GER-TCS-LR, and the roof-cutting resistance formula was derived. The research results show that if the immediate roof height is greater than the seam height, the roof-cutting resistance and width of the roadside backfill body should meets the requirement of the immediate roof being totally cut along the goaf. The roof-cutting resistance and width of the roadside backfill body were confirmed based on those research results by theoretical calculation and numerical calculation. The research results are applied into the engineering practice successfully, which have great significance to popularize the technique of gob-side entry retaining with roadside backfill in thin coal seams.

In order to reduce the occurrence of transportation accidents and improve the safety production of the coal mine, a intelligent traffic control system is designed.The system determines the location and operation state of locomotive according to the recognizer arranged in the roadway, and controls the locomotive in accordance with the principle of traffic control.The intelligent traffic control system was tested in the coal mine field, the test results have shown that this system can make traffic control to the locomotives quickly, and can accurately detect the illegal behavior of running the red light.

There are some problems in the monitoring system of the existing belt conveyor idling fault ，such as, wiring，communication difficulty，Inaccurate of Position Monitoring. To solve the problems，A fault monitoring system based on ZigBee wireless sensor network is designed.Based on the ZigBee wireless sensor network, the temperature collection of the roller shaft end and the network transition were realized and uploaded to the host computer designed by the labview through the serial port.thus, the dynamic real-time online monitoring was achieved. After field testing, the system achieves the purpose of fault location accuracy and automatic monitoring.

Based on the analysis of the current situation of coking coal such as the general situation, the coal preparation process, equipment, support facilities, operation, management etc. This paper points out the scarcity of coking coal resource, the achievement and the problems of coking coal preparation technology. Therefore, the coal preparation workers must actively adopt the domestic and oversea advanced technology, the advanced design ideas and the efficient coal preparation as well as the process and equipment for the protective development and utilization of the coking coal resource. The level of coal processing and utilization is improved to further reducing energy consumption and saving resource by continual innovation. The development trend of the coking coal preparation technology is prospected, which is advocating green mine, cleaning production and efficient utilization.

Take the example of the ongoing coal separating plant project as the research background,through the processing set-up, equipment selection,coal falling binning device and the regrading eqipment,Carry out a special optimization to Shatterproof measures and the high undersize fraction problem of coal，With the completion of the project put into operation,practice has proved that the reform effect is obvious,both the percent recovery of coal and undersize fraction maintained in high level, to provide reference to other projects when they want to do some similar technical reconstructions.

Loading ports in bulk, mainly metal ore is different from the coal loading system, the strength of the gate to demand higher problem, put forward the new type of jaw crusher gate instead of flat gate design, and on the strength of the two types of gate under different materials are compared, the jaw gates meet the port loading system according to different materials require high strength of gate design problem. Aiming at the strong adhesion of the powder ore, easy to adhere to the wall, the material dust can be changed by changing the funnel design, and the rectangular funnel is changed into a hyperbolic funnel .This paper improves the loading stability and loading efficiency of the rapid quantitative loading system of the port terminal, and provides the design idea for the research and development of heavy metal loading system.

For the Sihe Coal Preparation Plant tailings workshop filter press work completely by the workers manually, now on the filter press to upgrade. Through the master station and the way from the station to achieve automatic filter press production and group control. Between the master station and the slave PLC, between the PLC and the host computer through the Datalin intelligent gateway to achieve the data WiFi transmission, engineers can remotely control the PLC. At the same time through the Android mobile terminal by way of WebService to achieve access to the remote database. The test results show that the filter press can work automatically, and the staff can remotely monitor and control the filter press through the mobile phone client. The system can effectively reduce the labor intensity of the workers and realize the improvement of the tailings workshop.

Based on engineering practice of 162302 transport tunnel in xinji mining, the deformation character of tunnel sides and roof was analyzed by engineering test.The conclusion were drawn that the plastic deformation was obvious instability in tunnel sides and instability interlayer separation in middle of construction surface. the bolts were applied in middle of tunnel sides to keep plastic deformation stability and pre-stress anchor was applied in middle of tunnel roof to keep loose coal interlayer stability and conduit was layered in 2.0~2.5m limits of shallow loose coal to keep anchor successful installation.

Aiming at problems of Xiaotun Coal Mine such as fluvial rock in the roof and floor of roadway, destabilization of water immersed in Gob-Side entry, continuous large deformation of surrounding rock, etc., through the surrounding rock deformation monitoring and pull-out test, the analysis of the surrounding rock under the original support conditions deformation characteristics and causes of damage, and optimization of the support program, two gangs of hollow grouting anchor (anchor) high-strength pre-injection + roof high-strength full anchor + bottom grouting reinforcement support program were proposed. After the joint support scheme with anchor and injection, the displacement of the roadway surface is measured. Reduced by 38%,77%, and 40% respectively. The optimized supporting plan effectively controlled the deformation of roadway surrounding rock and achieved good support effect.

In order to solve the control problems of surrounding rock in roadway with thick coal and high sides, so the impacts of surrounding rock destruction were studied by numerical simulation when the roadway height and thickness of the top coal seam were different. The results show that the roadway height has a maximum impact on roadway sides, and the thickness of the top coal seam has a maximum impact on roadway roof. The feasible support scheme of bolt and anchor is proposed based on deformation characteristics of roadway and coal production and geology condition. Field test results show that the bolt-net-cable support scheme can not only effectively improve the support quality, but also control the deformation in relatively small size and ensure the stability of surrounding rock.

According to the difficulty problems of deformation and destruction of the return wind development roadway with broken surrounding rock and deep mining at damoling coal mine of xinmi city, and the reasons for the deformation and destruction and the regularity of mine pressure for this development roadway is analyzed, and the secondary joint support scheme for unsymmetrical "anchor cable shotconcrete" is adopted after combined with the theoretical analysis and the test of practice. This paper departures from the mining practice, and the diameter of a support bolt is 22mm, the length is 3000mm, and the distance between the upper and the shoulder pole is 650*750mm, 750*750mm, and the distance between the two bolts of the roadway is 750*750mm, and the secondary support mode for the "anchor cable and w steel belt" to strengthen the support is adopted. It can be seen that the optimized design scheme has better application effect from the industrial experiment on site，which the deformation of the surrounding rock of the backwind alley is basically stable after 17~49d, and the average deformation velocity is about 1mm/d.

Aiming at the coal seam with poor permeability and soft coal quality，the paper put forward a method of increasing permeability combined hydraulic flushing and carbon dioxide cracking blasting. It can further improve the permeability of coal seam and prolong the extraction time of high gas flow. The Field application test research was carried out in a coal mine. It has been found that the drainage gas quantity within 30 days has improved 45% compared to use hydraulic flushing separately. After 60d of drainage, the residual gas content of the area has been reduced by 22%, be relative to drain by using hydraulic flushing alone. It provides reference for gas drainage in soft coal seams of other mining areas.

In order to master the influence range and intensity of minging to the two-gates of Tingnan coal mine, to evaluate the reliability of the support in advance, based on the work pressure monitoring analysis of the support in advance and the observation and analysis of the deformation of the two channels, this paper get the influence range of the 302working face to the two-gates is 25 meters, and the working face has a larger influence to the two-gates within 10 meters, and the overall deformation of the roadway is relatively small. Finally confirmed that the support in advance of Tingnan 302 fully-mechanized working face is reasonable and reliable.

Abstract: Based on the occurrence conditions of multi coal seam group in Wang Jiazhai coal mine, the necessity of mining 8# coal seam as a protective layer on the 11# coal seam is discussed. The gas emission status, characteristics and influencing factors during the mining of the upper protective layer 8# coal seam are analyzed, and the gas extraction technique of the protective layer on the close seam is studied. Dynamic pressure relief gas, roof drilling to extract seam gas in the overlying seam and underground gas drainage in goaf to extract goaf gas. Through the transportation lane and the return air lane of the protective layer, the protective layer is drilled and pre pumped to effectively control the gas of the protective layer, so as to ensure the normal production of the working face, and the co production of coal and gas is realized.

To solve gas during the production of thick seam fully mechanized caving coal face, especially the exploitation of the early gas control problem, pelvic floor in nanshan coal mine area south of 18-2 second section bottom layer in the process of the implementation of the comprehensive gas control of fully mechanized top coal caving mining faces, for during the preliminary extraction in the extraction from the high technology was studied and improved results show that take active conduction closed drilling filling the leak relay technology such as high drilling field, improve the effect of the gas extraction, can effectively solve the cycle to the old area of a lot of gas emission supply gas pressure on the corner gas overrun problems, ensuring the safety mining face.

To study the spatial structure evolution and strata behavior of the overlying strata, taking the 2351 working face of Daizhuang Coal Mine as the engineering background, the filling effect under mining conditions was studied by similar simulation experiment. The results show that the settlement curve of the overlying strata obeys the normal function distribution, and the overlying strata of the filling stope have only the fissure zone and the bent subsidence zone. The evolution of the strata undergoes three stages: the undeveloped area, the extended area and the closed zone. The distribution of the stress changed from V-type to U-type, which is divided into stress recovery zone, pressure relief zone and stress concentration area. The evolution shape of overburden stress is Z, and the maximum stress concentration factor is 1.84. Filling body has a significant effect on the movement of overlying strata, with the advance of the face, the structure of the overburden evolved from the beam structure to the fissure arch structure and the multi-story arch structure, which provides a theoretical basis for the efficient control of the ground pressure.

In order to study the load transfer caused by the instability of pillar in the process of room and pillar mining, the load transfer rate Ti is applied to study the load transfer rule. Through the establishment of a numerical simulation model, the influence of the vertical stress on the adjacent pillar body around the pillar body around the pillar can be compared and analyzed. The results showed that the adjacent pillar body is very easy to be at the center of the pillar body failure stress disturbance, have exponential function relationship between Ti and Li; have an important impact load W/H aspect ratio, extraction rate e, the roof stiffness Er and pillar body stiffness Ep are at the center of the pillar body failure caused by the transfer rate. The research results provide a certain reference for the better use of the pillar mining technology in the mine.

In order to reveal the influence mechanism of bacteria on CO disappearance in sealed goaf, an experimental device of bacteria effecting on CO has been developed autonomously. By contrast experiment, the change law of CO and CO2 of coal samples was analyzed in sealed space under the condition of air sterilization before and after, coal samples sterilization before and after and water sterilization. The results show that the presence of bacteria could play a role in the disappearance of CO, and the influence mechanism of bacteria on the disappearance of CO had been inferred. The research results and ideas provide reference for the accurate prediction of sealed goaf.

The vast majority of coal and gas outburst occurred in geological structures, therefore, study of difference between tectonic coal and primary coal is of great importance for exploring coal and gas outburst mechanisms. In order to explore the frequent occurrence of coal and gas outburst accidents in the coal mine of Shijiazhuang, Yangquan Coal Group, by conducting constant-temperature gas emission test under different equilibrium pressure conditions for primary coal and tectonic coal samples, significant difference in the gas emission characteristics of primary coal and tectonic coal were obtained, especially for the initial stage of gas emission, gas desorption speed of tectonic coal is significantly higher than that of primary coal, and this difference was also reflected in the field test results of coal and gas outburst prediction, desorption index of drill-cuttings, K1 values, and tectonic coal thickness was positively correlated, the research shows that the coal and gas outburst in No. 15 coal seam of Sijiazhuang Coal Mine is obviously controlled by tectonic coal, and this research result will provide technical support for coal mine and gas outburst prevention and control.

In order to determine the effective drainage radius of borehole accurately and reasonably，the permeability of the coal around the borehole is taken as the main object of study，Comprehensive analysis of the stress field Elasto-plastic and methane seepage field around the borehole ，the dynamic model of coal permeability is established, which considers the effective stress in the mining process and the desorption and contraction of the coal matrix. Based on the basic theory of porous medium seepage, the differential equation of methane seepage in pumping boreholes is established, and taking Shaqu mine No. 4 coal seam as an example, numerical simulation is performed by using Comsol Multiphysics software, the variation law of coal seam permeability and gas pressure is obtained respectively, according to the relevant provisions of extraction standards, and taking the gas pressure 0.74MPa as the critical value, it is determined that the effective drainage radius of the borehole under the simulated condition of 180 days is 1.65m, and the results can provide reference for the actual production.

In order to understand the change law of gas concentration in simultaneous extraction of coal and gas. This paper using similar simulation and numerical analysis to calculate the stress of roof displacement and plastic area. The conclusions are as follows: While the 6# coal mine was advancing, the pressure relief range of floor, vertical displacement and the depth of plastic failure area are increasing with the working face advancing. While the working face are advanced at 80m, the pressure relief range of floor arrived 60m and tended to be stable,the vertical displacement arrived at 90mm and tended to be stable, the depth of plastic failure area arrived at 20m and tended to be stable.The advancing of 6# coal seam are in sphere of action of 6# coal advancing. The vertical stress in top are small and part area appears zero of stress，the height of pressure relief in top increased. The plastic failure area in 6# coal is larger than 6#coal seam. The maximum gas concentration during drilling of the 6# coal seam is 23% higher than that of the 4# coal seam, and the gas concentration of the drilled hole is still 10% higher than that of the 4# coal seam after the compaction is stable in the goaf. After the second mining pressure relief can significantly improve the drainage effect.

Abstract: In order to improve the evaluation accuracy of coal floor water damage, taking the evaluation of coal floor water hazard in the study area as an example, the vulnerability index method and water inrush coefficient method based on the GIS technology are comparatively analyzed, and the better evaluation method is selected. Through the use of GIS technology this article，using the vulnerability index method, thematic map of main control factors was established under the three levels--confined aquifer, geological structure and floor aquitard. The analytic hierarchy process was used to determine the weights and thematic maps were superimposed to generate the zoning map. When using water inrush coefficient method we got the result of evaluation partition. we can conclude that the GIS-based AHP Analytic Vulnerability Index method is closer to the actual situation and more instructive for safe coal mining after comparing the accuracy of the two methods.

In order to realize the high precision and autonomous measurement of the roadheader, a laser position and attitude measurement system based on laser measurement technology is established to study the accuracy of the course angle of the roadheader. The composition and working principle of the measuring system are introduced. According to the error transfer theory and the course angle solving mathematical model, the course angle error transfer equation is established and the MATLAB is used to carry out the simulation analysis of measuring process. And the analysis results show that the course angle measurement error of experimental simulation and practical theoretical study is basically the same, and this measurement system is the highest accuracy in the current various types of roadheader positioning and orientation method, which fully satisfies the requirements of the course angle of roadheader in current production of coal mines.

Abandoned coal mine brings a set of environmental problem, and the urgent assignment is to improve the usage rate, perfect the landscape and establish favorable ecological environment. Take the Zhaojin diggings in Tongchuan as the research object, we propose the reasonable treatment to recover zoology. Through the implementation of such methods, we find that the ecological functions and geomorphic unit of abandoned coal mine has been made effective recovery, environmental quality around the mine has been promoted obviously, the local economic development and dwelling level has been improved, and it could supply reference to restore and govern other congeneric abandoned coal mine.

The high voltage tower is a rod-shaped structure,which is very sensitive to horizontal, settlement and tilt deformation,simulated high voltage tower is used to provide auxiliary decision for real scanning.In this paper, the experimental method of fitting plane is adopted to evaluate the positioning precision of the single point,and the single point positioning precision under different distance and density,the methods and steps of data extraction and tilt analysis are also introduced.The experimental results show that the data collection of the high voltage tower is suitable for locating the station at about 10m, and the density is set at about 0.002m;take the southwest tower leg as an example,the research shows that the maximum deformation is on the horizontal projection,a method for extracting deformation of high voltage tower is provided.

Abstract：In order to study the effect of vibration parameters of vibratory bed surface on mass flow rate of material and the effect of throwing strength on the particles velocity layering, using EDEM software to simulate and analyze the influence of influence of amplitude, frequency and vibrating direction angle on the bed particles and the average speed of throwing strength on particle speed stratification. The results show that the mass flow rate of the material is approximately linear with the amplitude and frequency, and has a nonlinear relationship with the vibration direction angle, and the influence of amplitude, vibration direction angle and frequency on material mass flow rate decreases. The velocity of particle group is distributed in a gradient along the height direction, and increases with the increase of throwing strength. The influence of the throwing strength is more obvious when the material is closer to the bed.

In view of the increasingly diversified situation of mechanized sampling equipment, and the trend of integrated, miniaturization and transportable characteristic of mechanized mining system was introduced. The appearance of the integrated business of coal quality comprehensive and the maintenance of mechanized sampling system, the coal sampling for belt end, integration system integrated online detection，intelligent analysis laboratory of coal quality and other emerging detection technology were described. And the integrated business of coal quality and maintenance of mechanized sampling system’s advantage. This paper focuses on the system composition, combination method and advantages of the new mechanized coal sampling equipment, such as integrated and transportable characteristic, and the concrete composition and working way of emerging technologies such as the integrated online monitoring technology and intelligent analysis laboratory. After more than 30 years of research and application, mechanized coal sampling system has entered the stage of diversification based on customization. Finally, with the individual demand of the market, the development of online detection technology and robot technology and the appearance of the integrated business, Mechanized coal sampling system will have a considerable development.

In order to investigate the effect of coalification degree on tar composition characteristics of coal sample pyrolysis, pyrolysis experiments of coal samples were carried out with a thermal analysis device. On this basis, the composition characteristics of pyrolysis tar were studied by gas chromatography-mass spectrometry (GC-MS). Research results show that the heavy component content in tar (boiling point >360 C) gradually decreased with the increase of coal rank, while the light oil (<170 ℃), phenol oil and naphthalene oil (170℃~230 ℃) and wash oil (230℃~300 ℃) in tar produced by bituminous coal S was slightly higher than that of lignite NM and bituminous coal XJ and HL. The content of aromatic compounds in pyrolysis tar containing 2 and 3 benzene ring structures is lower than that of aromatic compounds containing 1 benzene rings, and gradually increases with the carbon content in coal samples.

In order to obtain quantitative information on the sulfur transformation during pyrolysis, the pyrolysis experiments of Maliantai coal from Ningxia were conducted in a lab-scale tubular reactor. The results show that 50 % to 70% sulfur of the total sulfur is fixed in the char. The desulfurization increases with the temperature and then retains about 46% when the temperature was higher than 600℃, in which the decomposition of sulfur form is dominated by the pyrite. Content of organic sulfur is higher than other sulfur forms, especially for the thiophene and sulfone. Mutual transformation of sulfur forms occurs during pyrolysis. And the desulfurization is the highest at temperature of 600℃.

In order to investigate the influence of acid treatment on the characteristics of coal in organic waste water treated with lignite, the brown coal in Mengdong was taken as the research object, and the coal samples were treated with different concentrations of hydrochloric acid and nitric acid solution. The changes of pore structure, surface functional groups and surface morphology of lignite before and after acid treatment were analyzed by BET, XPS and SEM. Results showed that with the increase of acid concentration, the specific surface area of lignite and the total pore volume first increased slightly, then decreased gradually. The average pore size of coal treated with higher concentration of hydrochloric acid increased compared with that of raw coal, while the average pore size of nitric acid treated coal generally decreased. The proportion of acid-treated lignite, C-C and C-O groups decreased, C=O groups increased, and the change after nitric acid treatment was more obvious. The homogeneity of particle size of lignite was improved and the folds were reduced after acid treatment at room temperature. The acid treatment changed the physical and chemical structure of coal to a certain extent, and the effect of nitric acid was more obvious than that of hydrochloric acid.

Data of 163 groups of coal quality was used in this study and principal component analysis was carried out to acquire the first three principal components of ultimate and proximate analysis of coal. Relationship of coal calorific value and the three was researched by regression analysis. Prediction models of coal calorific value were built and adaptability of the models was tested. The results showed that prediction models of coal calorific value acquired by the principal component - linear regression analysis have good adaptability.

Natural gas production from ultra-low permeability unconventional gas formations relies on natural fracture networks and the hydraulic fractures to provide the flow pathways from the formation to the well. The double-porosity model, a flow domain is composed of matrix blocks with low permeability, embedded in a network of interconnected fractures, is commonly used to simulate naturally fractured fracture. Global flow and transport in the formation occur only through the fracture system, conceptualized as an effective continuum. An important constant factor called shape factor is applied to simulate the matrix-fracture exchange term. However, most shape factors are borrowed directly from those used in conventional reservoir simulation, which may not be applicable in unconventional gas reservoir simulation. In this paper, geometric shape factors are derived considering the physics of gas slippage and the sorption term with the assumption of Lim and Aziz, and a fine grid discretization of two-/three-dimensional system are run to examine the accuracy of the new-derived shape factors. The results indicate the shape factors derived in this paper highly increase the accuracy.

Abstract：In order to solve the inclined and steep inclined coal seam fully mechanized mining equipment stability and the security problems of staff, in a comprehensive summary of years of full mechanized mining face equipment engineering practice, from the successful experience of inclined fully mechanized face equipment research of technology system, developed a complete safe and reliable technology and equipment incline coal seam comprehensive mechanization mining technology. The anti slip mechanism of inclined hydraulic support, discusses the safety protection device in the design and application of inclined fully mechanized working face. An effective solution to the stability conditions of fully mechanized mining equipment used in control system, to achieve safe and efficient mining in inclined coal seam conditions.

A new type of tensioning device for long distance,large capacity and high belt speed belt conveyor is proposed. The permanent magnet synchronous motor(PMSM) has unique superior performance. Based on the electric tensioner, the PMSM and reducer are integrated into the tensioning drum to realize the integration of tensioner. Based on TBYC-55-8(380) and the maximum static force of steel wire rope is set at 100 kN, the drum model is established and the finite element analysis is carried out, and the feasibility of drum design is verified. Intelligent tensioning device is the future development direction.

In order to make the robot adapt to the mine's working environment better, instead of human being performing the task of geological exploration, safety inspection and so on, a mine intelligent robot motion control system is designed. The system consists of hardware system and software system composed of two parts. The hardware system refers to the trailing arm elastic suspension system as a motion control carrier, which includes the mechanical structure and the servo drive system. The software system is mainly based on the servo driver's HD control algorithm using software programming to achieve the robot's motion control. In order to verify the feasibility of robot motion control, the author performed mathematical modeling and MATLAB simulation experiments on the system. In order to test the practicability of the motion control system, the author made a torque check and a speed simulation experiment on the servo motor. The experimental results show that the system has the advantages of simple structure, stable and reliable performance, and is suitable for working applications in the actual mine environment.

Explosion-proof battery LHD is mainly used to clean up the remaining floating coal on the ground after continuous miners cutting, and with its no-pollution advantage in the underground being widely used gradually. However, the working mechanism of the LHD often affects the efficiency of cleaning up the floating coal. According to analyzing the problems occurred in the former industrial test, the technical improvement and design calculation was carried out. It was found that the LHD with the improved working mechanism was well enough to meet the needs in underground of cleaning up floating mine and handling cargo in DaLiuTa coal mine, which provided great convenience for production and improved work efficiency.

This paper briefly reviewed the operation situation of China's coal market since 2001, considered that the coal market fluctuates greatly in history. Expounded the causes of the severe fluctuation of the coal market, analyzed the harm caused by the fluctuation of the coal market. Analyzed the six major factors affecting the future coal market, and the research believes that the future will be beneficial to the smooth operation of the coal market in China. The fluctuation of the coal market is expected to decline, and suggestions for stabilizing the coal market are put forward.

In order to further improve the coal enterprises to major accidents in early warning and prevention capacity, speed up the risk management of enterprises to prevent change in advance, co-ordinate the national level of coal mine safety supervision and inspection work, Through in-depth study of coal mine safety risk prediction and big data analysis technology, A coal mine safety risk prediction system is constructed that is based on the big data analysis platform, The system can dynamically display the situation of coal mine safety production, coal mine accident law, the predict of the risk of coal mine accident, the monitor of accident network public opinion and comprehensive management of forecast data, Compared with similar systems, the forecasting system based on the big data analysis has certain advantages in the aspects of accident law mining, public opinion monitoring and control, production scheduling and command decision, That can effectively improve the safety supervision departments and coal enterprises risk prevention and control and decision-making efficiency.

Based on the low-carbon background, the use of VAR model to study the dynamic relationship between environmental regulation, low-carbon technology innovation and low-carbon development of the coal industry. The results show that: China's environmental regulation and low-carbon technology innovation to promote the low-carbon development of the coal industry is a gradual process. Among them, environmental regulation plays a role in delay, the role of low-carbon technology innovation is more significant, but both of the promotion effect can exist can continue Rising space. The low-carbon development of the coal industry can also adversely affect the intensity of environmental regulation and low-carbon technology innovation, but the driving force for reverse-driven low-carbon technology innovation is slightly weaker.