In order to further improve the recovery rate of coal resources, reduce the number of driving teams in production mines, reduce the driving footage and driving rate of roadways, and eliminate the hidden danger of coal spontaneous combustion and the impact of concentrated pressure caused by the coal pillars in the goaf, Shendong mining area vigorously promotes the innovation and application of the mining technology without coal pillars, and innovates the soft mold concrete construction technology and the roof cutting and pressure relief construction technology The key innovative equipment, such as hydraulic support, embedded anchor cable and constant resistance anchor cable, has been researched and developed for the gob side entry retaining process. The various pillar free mining technology methods, such as gob side entry retaining, gob side entry digging and filling mining, have been improved, the efficiency of pillar free mining has been improved, significant economic benefits have been created, and good mining results have been achieved. In this paper, the pillar free mining in Shendong mining area has been studied The key technology and application of the system are introduced.

Abstract: Based on the engineering background of the large-span mining roadway in the three soft and thick coal seams of Zhaojiazhai Coal Mine, combined with the actual project after the road expansion, the plan of filling and retaining roadway in the pre-cut roof is proposed. Through theoretical analysis and numerical simulation method, the stress characteristics of surrounding rock in mining roadway under non-cutting and cutting conditions are compared and analyzed, and the remaining width of filling wall under cutting condition is determined to be 2.2m. The on-site monitoring results show that under the condition of pre-cutting top pressure relief, when the filling wall width is 2.2m, the stability of the mining roadway can be effectively maintained, and the roadway can be smoothly carried out. The research results can provide a reference for the retaining of the long-span mining roadway in the three-thick thick coal seam under similar conditions.

Abstract：In order to master the implementation of the current Coal Mine Safety Regulations，carry out evaluation on the implementation of CMSR it was entrusted by the State Coal Mine Safety Supervision Organization. To evaluate the effect of the current CMSR on coal mine safety production and the existing problems in the implementation by means of investigation, discussion and questionnaire. This paper discusses the mining of coal seam roof and floor under pressure，Requirements for internal and external spraying of roadheader, excavator and anchor and continuous miner，Caving coal mining with outburst risk in coal seam，Shaft hoisting about the terms are not expressed strictly、are prone to divergence or the user's understanding is not in place，unclear concept definition，technical limitations and difficulties in implementation at present stage，lag in formulation and revision and put forward the evaluation opinions and suggestions of the CMSR.

Taking Xiaobaodang mine as an example,this paper introduces the design of mine enterprise management network,including network connection design,main equipment,IP address and VLAN planning,routing configuration,Internet access configuration,redundancy and reliability design,and management design.The network adopts Ethernet technology and star network topology structure to provide network transmission platform for mine safety production management system,video conference system, office automation system,enterprise ERP system and Internet access,and realize centralized management of network.

In order to respond to the call of national environmental protection, a large number of coal storage shed projects in coal mines have started construction, and pile foundations with large horizontal bearing capacity have been more and more widely used. The calculation formula of the characteristic value of the horizontal bearing capacity of pile foundation is put forward in the code. There are many influencing parameters. How to choose the value of each parameter has always been the key and difficult point in the design of this type of pile foundation. In this paper, the eigenvalues of the horizontal bearing capacity of single pile under the influence of different parameters are calculated, the results are analyzed and compared, the influence scope and development trend of each parameter are summarized, and the calculation results are checked with the single pile horizontal static load test of a specific project. Finally, some concrete construction measures are put forward to make the horizontal bearing capacity of pile foundation play a more full role, and then the results are generated. Better Economic Benefit.

With the rise of intelligent coal preparation plant construction, how to collect, store and share the data of the existing production system has become the primary problem to be solved. The research introduces the construction of standard data platform for coal preparation production process (Abbr. CPSDP) and its key technologies, includes the real-time collection of PLC data in the production centralized control system and the discrete data collection stored in the relational database, explains the storage rules of the data in the above two different collection methods, shares to different software demanders of intelligent construction through web API general interface. The construction of standard data platform for coal preparation production process will provide massive basic data of coal preparation standard for scientific researchers and production management workers of coal preparation plant, and provide services and data support for the establishment of big data platform of coal preparation information and the intellectualization of coal preparation process.

In order to find out the exact location and water rich situation of F32 fault in front of the main shaft driving in a mine in Huainan, in view of the diversity of knowledge and multi solutions of results in a single geophysical method, a multi parameter comprehensive geophysical method combining reflection seismic method and transient electromagnetic method is proposed to detect F32 fault in advance. In addition, with the help of numerical simulation and physical model test, the advance exploration of geological conditions in front of shaft driving is systematically studied. The research results show that the comprehensive advance detection of various geophysical methods can improve the accuracy of the interpretation of the geological conditions ahead of the excavation, in which the reflected seismic wave method can locate the location of the geological interface, and the transient electromagnetic method can judge the water rich characteristics of the structure based on the analysis of electrical characteristics, and can assist in determining the location of the geological interface. The field application shows that the fault F32 is located in the section of -786.8-792.8m, and the overall water content of the rock stratum is not strong; the detection results provide effective technical parameters for the mine design and safe construction of the shaft, and also provide reference for similar projects.

Abstract: In the engineering background of guizhou coal mine in sand-layered transportation lane 141713, about the mine transportation lane deep high stress soft rock supporting problem hard, roadway destruction features through the field investigation and laboratory with multi-function powder X-ray diffraction analysis of surrounding rock composition, the article analyses the failure mechanism of roadway, it is concluded that low intensity of surrounding rock and clay minerals content of the supporting way, unreasonable, mining effect, high stress, and the main causes of water seepage is the deformation of roadway surrounding rock. According to the characteristics and mechanism of roadway failure, the combined support scheme of "anchor cable + steel mesh + grouting + u-beam steel shed" was proposed, which was verified by theoretical analysis, numerical simulation analysis and field measurement. After numerical simulation support, the maximum subsidence of roadway roof and the maximum floor heave of roadway decreased from 160mm and 60mm to 45mm and 40mm respectively.The maximum movement of the two sides of the roadway decreased from 60mm to 14mm; The maximum principal stress increased from 24MPa to 28MPa. The field monitoring results show that the maximum convergence rate of roadway section after support is 9.87%, the deformation of roadway surrounding rock is under control, and the support effect is obvious Key words: High stress soft rock; Grouting; The roadway supporting; Numerical simulation; Monitoring

At present, under the influence of low mechanization and poor rock property of roadway roof, when the temporary support cannot be used normally, the front probe beam + wood backed wood or point pillar are often used for temporary support. These two temporary support methods have such problems as long-time, unsafe process and poor effect after temporary support.In view of the problems existing in temporary support of rock roadway in Juji Coal Mine, this paper analyzes the causes of the problems, puts forward the temporary support scheme of front probe beam + through iron back plate, and standardizes and optimizes the temporary support process.The field test shows that the temporary support technology of front probe beam + through iron back plate takes a short time, the temporary support process is safe, and the effect of the temporary support is reliable. Compared with the original temporary support, the construction efficiency of the temporary support can be doubled.The temporary support technology of front probe beam + through iron back plate protects workers' safety, improves work efficiency, and meets the requirements of safe and efficient development of the mine. It has a wide application prospect and reference significance in the construction of coal mine rock roadway.

Mining imbalance is a big problem that restricts the efficient mining of coal mines. The rapid excavation ability evaluation of mining roadway can reflect its driving level clearly and intuitively, which is the key to ensure the mining balance. Based on this paper, taking four mines (A, B, C, D) as the research object, through reading the relevant literature and combining with the actual situation of the site, the evaluation index system of rapid excavation ability of mining roadway is constructed from four aspects of "people, mechanical equipment, geological environment, management". Based on the combination weighting method, an evaluation model was established to evaluate the rapid driving ability of four mining roadways. The evaluation results show that: the rapid excavation capacity of mining roadway3202in a mine and mining roadway 2301 in D mine basically meets the needs of excavation replacement, while the driving capacity of mining roadway10905 in B mine and mining roadway11602 in C mine needs to be further improved. According to the evaluation results, the key factor that restricts the rapid excavation of coal mining roadway is "geological environment". The research results can lay a solid foundation for the improvement of mining roadway driving level.

In order to determine the ground high-pressure grouting parameters of deep and thick loose layers, taking the Guotun Coal Mine's industrial square vertical shaft passing through the loose layers as the research object, the borehole water pressure test and the ground high pressure grouting test methods are used, and the ground water permeability and unit are obtained according to the test monitoring data. The relationship between water absorption, depth, and grouting pressure; according to the ratio of grouting pressure to static water and the ratio of pressurized water flow to grouting flow at the injection point of each layer, the size of grouting pressure and grouting volume are determined; finally, wind inspection 3 The hole grouting effect was evaluated. The results show that: (1) The water permeability of the wellbore through deep and loose formations decreases with the increase in thickness, and the unit water absorption of each grouting layer increases approximately linearly with the pressure at the injection point; (2) The high pressure grouting pressure on the surface of the deep and loose formations When the hydrostatic pressure reaches 2.0 to 2.5 times, the cement slurry can be smoothly injected into the stratum to be reinforced; when the pressure water test and the grouting test of each grouting layer are subjected to the same injection point pressure, the grouting flow is half of the pressure water flow; 3) During the surface high-pressure grouting test, the pressure grouting of each layer has little effect on the wellbore. The test results have been successfully applied in the main, auxiliary, and air shaft deflection control surface high-pressure grouting projects, providing a reference basis for determining the ground grouting parameters of the thick loose layer under similar conditions in the future.

In order to prevent the strong underground pressure of 42107 mining face of Buertai coal mine, the VB.net programming technology was used to analysis the monitoring data of resistance of hydraulic support in working face are used to extract the maximum value of mining cycle, and the cloud visualization analysis of which is carried out. The results show that the strong underground pressure of 42107 working face in Buertai Coal Mine is mainly affected by the hard strata between layers of 22 and 42 coal seams. Under the restraint of wide coal pillar, the area of hanging roof at the edge of goaf is large, and the roof activity at the head and tail of working face is inadequate; under the hanging roof at the edge of goaf, the underground pressure of advanced roadway in working face is strong; Because of the longer mining face, and the pillar of the upper 22 coal seam, there is strong ground pressure in the middle part of the working face. Based on the law and mechanism of strong underground pressure, the prevention and control method of strong underground pressure is discussed. The practice shows that the control effect of strong underground pressure is good.

The determination of the fracture angle is critical to the design of gas extraction boreholes in goaf. However, The existing re-searches mostly stay on the basis of numerical simulation and similar material simulation, and lack effective verification of field measured data. Based on the actual situation of Shen Nanwa Coal Mine, this paper conducts an in-depth study on the development of the fracture angle under the condition of large mining height of composite roof. Through the long-term ob-servation of the high-level drilling extraction data, the fracture angle along the working face side is calculated; The lateral fracture angle of the goaf was studied by double plug water test; Finally, UDEC numerical simulation is used to analyze the evolution process of overburden mining fissures and fracture angles. Research indicates: when the surface advancing speed is 3.6m/d, the fracture angle of the working surface side is 59°, and the lateral fracture angle of the goaf is 58° at 100~110m behind the working surface; The fracture angle is in a dynamic process that will gradually change over time, up to 109°. The obtained research results can provide theoretical basis for the study of drilling arrangement and gas migration and enrichment in goaf.

In order to solve the problem of gas control in irregular working face adjoining Gob, taking the No.2327 working face in Jinyuan Mine as project background, the law of gas migration in gob was studied by theoretical analysis and field measurement. The gas concentration of open-off in No.2321 gob is 42.86%,which is about four times of the average gas concentration of the gob, which verifies the existence of the gas enrichment area in the gob. According to the law of gas emission during excavation, the degree of gas enrichment in gob was divided into three areas: solid coal area, gob gas enrichment area and gob gas non-enrichment area. Focusing on the gas enrichment area in gob, the measures of blocking gas gushing passage, upper corner drainage and high borehole drainage in gob are adopted. The gas concentration in return air roadway is range of 0.06%～0.12% and in upper corner is range of 0.14%～0.22%. The gas danger in the mining period is solved economically and effectively

he caved roof can not effectively fill the goaf during the mining of thin direct roof, which causes the long cantilever structure to form on the thick and hard base roof and squeeze the roadway.Based on the conditions of thin direct roof and thick basic roof on 1103 working face of a mine, a fracture mechanics model of cantilever beam on the bottom slit basic roof was established.The calculation method of the resistance of the side cut roof when the basic roof is broken is deduced and reasonable cutting top parameters are determined by numerical simulation.The results show that:When the side length of cantilever roof and rock loading parameters, such as certain, lane escribed jacking resistance after the first increases with the increase of cutting the top height is reduced, to make thick overlying roof along the slip surface rupture and instability of kerf width, reasonable cutting parameters should be cut top height 4 m, kerf Angle of 10 °, the lane beside provide the cutting resistance of at least 3350 KN.The research results have been successfully carried out in the field engineering, which can provide reference for similar engineering projects.

Using the method of combining fluid-solid coupling velocity field and heat transfer field, the temperature field of the maximum heating point of the 560kW mine permanent magnetic coupling applied to the open-pit mine centrifugal load speed regulation process is studied, and the heat loss under the maximum heating point working condition It has a 3rd power relationship with the slip. The fluid-structure coupling velocity field calculates the heat dissipation coefficient of 139.9 W/(m2*k). The highest temperature is 107.53°C at the heat source copper plate, and the lowest temperature is 69.3°C at the permanent magnet plate. It meets the requirements of industry standards, but the high temperature rise causes the magnetic field transmission performance to decline. Based on this working condition, a method of opening vent holes in the inner ring of the steel plate is proposed to improve the heat dissipation performance, and finally the maximum temperature of the copper plate is reduced by 10℃, and the remaining temperature is reduced by 4~6℃, and the temperature distribution is more uniform.

The raise boring machine uses reverse drilling to break the rock. The rock slag formed by the crushing of the drill bit falls by its own weight, there is no repeated crushing phenomenon, the rock breaking efficiency is high, and the drilling speed is fast. Under the condition of a raise shaft with a small inclination angle, the slag cannot fall stably by its own weight when the drill bit is reamed in a vertical or large angle. The thesis uses the balance formula of the saturated soil in the direction of motion and the improved formula of Scherzler to compare calculations and experiments. The results show that the theoretical calculations are consistent with the experimental results and prove the accuracy of the theory.

Hydraulic support is the important equipment in coal mining. The progress of hydraulic support equipments is important for the development of coal mining in China. This article starts from the technical composition of hydraulic support equipments and the development of patent application trends，by sorting and analyzing the data of hydraulic support patent applications, then selects the hydraulic support as the research focus, and obtains the technical requirements, efficacy and technology development route of the hydraulic support.Studies show that China's hydraulic support technology should aim to improve efficiency with the reliability, high strength, automation, and large-scale as the development priorities. Especially we should make the control systems as a breakthrough point.

For further research on the influence of the blasting effect of gas disaster governance, on the basis of the studies of the xiangshan coal mine, with 21301 tunneling faces as the research object, the establishment of a loose blasting under the action of gas drainage gas recovery - solid coupling model, the effect of the surface loose blasting control the gas on the numerical simulation research results show that the blasting explosive detonation, surrounded by blasting in coal seam drilling dynamic load presents increasing trend, and accompanied by an expansion of the damage area of coal seam, further lead to excavating surface integrity damage of coal seam, the permeability of coal seam After loose blasting, the gas pressure reduction zone generated around the blasting borehole promotes the gas transfer to the surrounding environment and the extraction borehole, so as to achieve the purpose of rapidly reducing gas pressure. Finally, the result of this model is compared with the accumulated gas flow collected on site, verifying the rationality of the gas-solid coupling model of loose blasting.

In order to study the main influencing factors of water inrush from the working face of Jiaozuo mining area and how to take corresponding prevention measures,select geological structure λ1,coal seam thickness λ2,coal seam dip angle λ3,working surface width λ4, mining depth λ5, aquifer head pressure λ6, septumThe average intensity of water layer λ7 and the average thickness of water-repellent layer λ8 were used as research variables to establish a factor analysis model for water inrush from the working face of Jiaozuo mining area. The results show that the eight variables of water inrush from the floor of Jiaozuo mining area can be summarized as mining occurrence factor, mining design factor and technical variable factor. It is concluded that the model weighted comprehensive score ≥0.95 is very dangerous and needs to be taken. The discriminant standard of the corresponding technical measures; the factor analysis model was successfully applied and verified in the 11011 working face of Zhaogu No. 2 Mine. The research results of the thesis provide a certain reference significance for whether the floor of the mining face under the mining area and similar geological conditions needs grouting reinforcement or other prevention measures.

Abstract：In order to explore the risk of water inrush from the bottom of the two-level main mining 2nd coal seam in the deep extension of the suburban coal mine, according to the characteristics of the two horizontal floor strata and fault structure in the mining area, the fault structure complexity of the two horizontal floor is adopted by the water inrush coefficient method and the fractal dimension method. The risk of water inrush was quantified and integrated. The results show that although the calculation process and the quantitative partitioning parameters of the two methods are different, the quantitative partitioning performed has good consistency, and the fractal dimension of the fracture structure has a significant positive correlation with the water inrush coefficient value, and the fault structure is complex. The value of the water inrush coefficient corresponding to the area is obviously too large. The comprehensive comparison shows that the water level of the two horizontal coal seams is larger in the east and west, and the middle area is safer. The research results have important reference value for the safety belt pressure mining of the second level and the second coal seam in Chengjiao Coal Mine.

Reuse ways and treatment technologies are the most important factors affecting mine water reuse. Therefore, through a large number of literatures and investigations, the reuse ways and treatment technologies of mine water in major foreign mining countries are analyzed and summarized. At present, in addition to mining production reuse, foreign mine water reuse ways mainly include domestic drinking, industrial uses, irrigation, environmental uses and heat supply, etc. At the same time, mine water discharge is also common. Foreign mine water treatment technologies mainly include active treatment technologies such as reverse osmosis, and passive treatment technologies such as constructed wetland. More emphasis is placed on the development and application of passive treatment technologies with low energy consumption and low maintenance. In addition, foreign developed countries also generally pay attention to mine water classification collection, and the treatment of abandoned mine drainage, etc. The research on the current situation of foreign countries can provide a higher learning significance for the mine water reuse in China.

In order to further improve the positioning accuracy of personnel in underground coal mine , Salp Swarm Algorithm is introduced in this paper for location estimation. The algorithm is easy to calculate with a simple structure and able to improve the initial random solutions effectively and converge towards the optimum. When dealing with the nonlinear equations obtained from the measurement data of four UWB base stations, Salp Swarm Algorithm does not eliminate the common quadratic variables as the least square method does, but uses the original overdetermined equations to find the optimal solution, which is also an important reason why the Salp Swarm Algorithm has a higher resolution accuracy than the least square method. The simulation results show that the Salp Swarm Algorithm performs better than the least square method in the 3D location calculation based on the distance and azimuth of the target.

In order to determine the failure mode of slope sliding in the southwest side of Weijiamao open pit mine, the position of slope sliding surface was determined, the failure evolution mechanism and failure mode of slope rock mass were revealed ,the failure mode of the slope was found out and the control plan of the landslide was put forward through the field and geological survey of sliding mass, deep and surface displacement of slope joint monitoring. The results show that the potential slip surface of the slope was 27m-32m below the orifice; the displacement of the slope present a "L" type change process of "rapid growth- slow balance- readjustment", and the slope was in limit slip state at present; the slope slip presents a mechanical mechanism of "excavation unloading shear failure", and the macro failure mode of the slope was shear failure; the weak interlayer was eroded by water and the stress of rock mass was released peeled off after advancing was the main reason of the slope sliding.

Coal/oil co-processing technology is an important way for clean and efficient utilization of coal and inferior heavy oil. Taking the recycle solvent, petroleum based heavy oil and lignite as the research objects, the effects of the concentration,solvent properties and ratio of two-component solvent (recycle solvent and heavy oil) on the viscosity-temperature characteristics of the coal-oil slurry were investigated. The liquefaction reactivity of the two-component solvent coal-oil slurry was studied, and the properties of the liquefied products were analyzed. The results show that the viscosity of the coal-oil slurry decreases rapidly to a lower value with the increase of temperature. Under the same conditions, the higher the concentration is, the greater the viscosity is. The viscosity-temperature characteristics of two-component solvent coal-oil slurry are similar to that of heavy oil-coal slurry, and the overall viscosity is lower than that of heavy oil-coal slurry. The higher the heavy oil content, the lower the viscosity rebound temperature and the larger the rebound range. When the heavy oil content is 30%, the viscosity rebound temperature is 240 ℃, and the rebounded range is the largest. Under the same viscosity requirement, the two-component solvent can prepare higher concentration of coal-oil slurry. In the process of coal/oil co-processing, there are synergistic effects, which optimize the transfer process of active hydrogen. When the content of heavy oil is less than or equal to 20%, higher oil yield and lower asphaltene yield can be obtained. With the increase of the proportion of heavy oil, the content of binuclear aromatics and long chain alkanes in the oil increases, and the distillation range increases.

The combustibles in gasified fine slag are recovered by carrier flotation. As a kind of solid waste, gasification fine slag has small particles and porous surface, which can absorb a large amount of reagent, so there are few economical and effective recovery methods. In this experiment, the dosage of drug can be effectively reduced by carrier flotation, about 50% of the drug dose can be reduced. Through the measurement of contact Angle, the analysis of scanning electron microscope and the measurement of Zeta potential, the properties of gasified fine slag and gasified fine slag with carrier were studied, and the floatability of gasified fine slag with carrier was studied.The carrier flotation method can reduce the ash content of gasified fine slag from 68% to 25.62%, while the ash content of tailings can reach 96.43%, the recovery rate of combustibles is as high as 94.55%, and the calorific value of concentrate can reach 6010 KCal/kg.

In view of the situation that the actual data of coal particle motion analysis is missing due to being blocked in the process of coal particle screening, the method of machine vision is used to detect and track the moving coal particle. In this paper, a simulation excitation experiment platform is set up to collect the sequence image of single coal particle under occlusion by high-speed camera. In the MATLAB, the guided filter is used to remove the noise from the sequential images, and the GMM is used to extract the potential masks of the target coal particles effectively. The target coal particles are tracked by the Kalman Filter. The experimental results show that the method used in this paper can effectively detect the moving coal particles, and still has good tracking robustness for the situation that the moving coal particles are blocked. In addition, we could obtain the centroid position information in the process of coal particle movement, which provides the experimental basis for theoretical analysis and numerical simulation of coal particle movement.

Abstract: Aiming at the obvious defections in explosion-proof and energy consumption of domestic diesel engine rubber wheel vehicle, this paper based on the design idea of electric transformation of diesel engine rubber wheel vehicle, using MATLAB/Simulink to build the complete vehicle model of target electric rubber wheel car, designs the driver model based on PI algorithm, and formulates the vehicle control strategy. The LUDDS with auxiliary roadway slope condition of Wangjialing coal mine is used as the target condition to simulate the vehicle performance, the reliability of the model is verified, and the battery SOC, power consumption and driving mileage under different operating conditions are compared and analyzed. The results show that the regenerative braking function of the electric rubber wheel car under the condition of low speed, frequent start-stop and slope can obviously improve the driving range. When the average slope is small, frequent start—stop is the main factor affecting the continuous mileage.

The drainage pump house in 5-2 coal face of Daliuta coal mine mainly undertakes the tasks of pumping water from 5-2 coal face, cooling water from underground production system, water from main and auxiliary haulage roadway and water from exploration and drainage. At present, the Pump House has been fully automated, but in the course of daily operation, because of the high failure rate of the electric valve in the drainage system, when starting the centrifugal pump, people are often required to observe the flow rate, positive and negative pressure meter data on the spot, and all kinds of ball valve, gate valve open and shut state, determine whether the centrifugal pump pumping is normal. Secondly, it also needs personnel to pump room motor, cable and pump body daily vibration, temperature, sound abnormal spot check, on the pump room ambient gas daily monitoring and inspection, resulting in large staff input, low efficiency and other issues. To this end, Daliuta Coal Mine introduced the intelligent inspection robot of wheel type to replace the manual inspection in the drainage pump room of Wupan district, and realized the temperature inspection of the motor, cable, bearing and pump body of the pump room, as well as the independent recognition of the values of various kinds of instruments and meters, and the centrifugal pump abnormal sound diagnosis and other functions, has obtained the good application effect.

This paper takes the coal listed companie s in 2013-2017 as the research sample, and empirically tests the relationship between overconfidence and innovation performance of China's coal enterprises, as well as the regulatory role of corporate debt when the size of enterprises is different. The results show that: the overall coal enterprise executives overconfidence suppresses innovation performance; when the corporate debt is high, the large-scale model coal enterprise executives overconfidence suppresses innovation performance, and the corporate debt plays a regulatory role; the small-scale model coal enterprise debt and innovation performance have an inverted U-shaped relationship. And put forward corresponding countermeasures and suggestions to promote the innovation and development of coal enterprises in China.

In order to correctly understand the factors that affect the emergency management capabilities of coal mine enterprises, the study uses structural equation modeling (SEM) to analyze the main factors that affect the emergency management capabilities of coal mine enterprises. Firstly, theoretical analysis and on-site investigation are used to systematically consider and extract 13 factors in 4 categories that affect the emergency management capabilities of coal mine enterprises; then SPSS 19.0 is used to process the questionnaire and analysis of reliability and validity; finally, AMOS 21.0 is used to construct The structure equation model of coal mine enterprise emergency management capability factors and emergency response and rescue effect is further analyzed, fitted and revised, and the causal relationship and influence coefficient between each index are obtained. The results show that post-event management capabilities, risk management capabilities, mechanism support capabilities, and emergency prevention capabilities have an impact on the emergency response and rescue effects; among them, the post-event management capabilities have the greatest impact on the emergency response and rescue effects, mainly focusing on the recovery of production and rapid decision-making The ability to implement corresponding emergency measures; followed by risk management capabilities, mechanism support capabilities, and emergency prevention capabilities.

Abstract: Based on the panel data of 30 provinces in China from 2000 to 2016, the fixed-effect panel model was used to empirically study the influencing factors of energy intensity. The research results show that the level of economic development has an inhibitory effect on energy intensity. The level of urbanization and the structure of energy consumption have a positive effect on energy intensity. There is an inverted “U” type nonlinear relationship between i advanced industrial structure and energy intensity, and As of 2016, the industrialization level of nine provinces and cities such as Tianjin and Inner Mongolia is lower than the inflection point value, which indicates that improving the level of advanced industrial structure in these provinces can further promote the the reduction of energy intensity. Finally, based on the results of estimation and analysis, countermeasures and suggestions for reducing energy intensity are proposed.