In order to ensure the sustainable exploitation of coal mines in Panxie area of Huainan, based on the geological characteristics of the mining area with thick topsoil layer, multiple coal seams, deep coal seam burial, high gas content, poor permeability and large ground pressure, combined with the current mining area succession of the mine and the existing production system, some design philosophy of mining scheme were analyzed with the purpose of make full use of resources, such as the way of extending depth, division of Mining area and working sector, control mode of coal seam (group) gas, program of groundwater disaster control, roadway system layout of mining area, etc. A set of design methods for safety reconstruction and horizontal extension in mine with high gas outburst under complex geological conditions were summarized. The studies would provide reference for safety reconstruction and horizontal extension ofcoal mine with similar conditions.

This paper describes that Gaoshan coal mine has a small area and recoverable reserves, and the area is relatively flat. This area belongs to a low middle mountain area dominated by karst landforms. In terms of the selection of industrial site location and development method, Gaoshan coal mine has overcome the traditional thinking of the past. Gaoshan coal mine takes the Wang’s plan as the final plan which means that Gaoshan coal mine mines the coal of industrial site and sets the main inclined well and the auxiliary inclined well as roadway. This plan laid a solid foundation for building the Gaoshan coal mine project of high quality, fast and economically. What’s more, this paper has some reference significance for other similar coal mine building projects.

In?the?design?of?the?trestle?of?coal?system,?the?arrangement?of?single?trusses?has?always?been?used,the?characteristic?of?continuous?truss?has?been?statemented?in?this?paper:Basing?on?elastic?sliding?support?arrangement?to?design?of?continuous?truss;The?horizontal?displacement?of?supporting?structure?under?various?load?conditions;Comparison?of?the?chord?force?between?continuous?truss?and?the?single?truss;Less?steel,?less?cost?and?also?being?able?to?meet?the?larger?span?truss?design.Analysis?of?the?Effective?length?of?the?bracket?along?the?truss?direction?under?the?continuous?truss?arrangement.

The shaft construction method of coal mine in China is dominated by conventional sinking method and supplemented by special sinking method. This paper introduces the development course and application status of drilling technology using mechanical rock breaking with shaft drilling machine and raise boring machine. Safety and efficiency in shaft excavation are the cornerstone of deep shaft construction. The development of mechanized sinking technology and equipment is a guarantee of less humanized and unmanned construction of deep shaft. The research status of drilling technology and equipment of partial section shaft boring machine is analyzed. The need to develop full section shaft boring machine is proposed. The characteristics and applicability of key technology, including sidewall stabilization, sinking process, drilling parameter, are discussed. In view of the parallel operation of excavation, slag discharge and support during construction, rock breaking, host system, and directed driling will become the direction of technical research and the difficult point of engineering application. Drilling technique of full section shaft boring machine is the development direction and trend of integrated mechanized shaft sinking, which is of great significance to mine construction technology development and underground engineering construction.

In view of the severe ground pressure in the traditional wall-built gob-side entry retaining, such as obvious roof subsidence, floor heave, extrusion of two sides and wall damage, and the high repair rate seriously affects the normal use of the roadway, this paper studies the large deformation control technology of floor heave under the condition of block filling gob-side entry retaining by theoretical analysis, numerical simulation and ground pressure monitoring. A comprehensive control system for large deformation of floor heave is put forward, which includes "roof presplitting blasting pressure relief technology"+"strengthening support technology for key parts of roof"+"flexible yielding support technology above block"+"double control bolt support technology for block wall". Through the implementation of the above technology, the stress transmission of roof is cut off, the pressure of roof is reduced, the stress condition of surrounding rock is improved, the stability of roadway roof and wall is improved, and yielding support is realized. The field monitoring shows that the stress value of anchor cable and deformation of floor heave are reduced by 34% and 77% respectively, and the height and width of roadway meet the requirements of safe production. The research results have certain reference significance for controlling large deformation of floor heave in block filling roadway under other similar geological conditions.

In order to study the feasibility of Y-type ventilation system formed by reserving high extraction roadway along goaf side, this paper studies the rational layout of high extraction roadway and the stability of surrounding rock by means of field investigation, theoretical analysis, numerical simulation and field industrial test, taking the engineering geological conditions of 1112(1) working face of Zhuji Mine as background. The results show that the high-pumping roadway should be arranged in the sandy mudstone 15-35 m above the 11-2# coal seam, and the optimum value of different horizontal distance between the high-pumping roadway and the track roadway is 20 m; the high-pumping roadway is supported by U-shaped shed and anchor cable, and the anchor cable is supported by the maximum scheme of one time support; the on-site mine pressure observation and the anchor cable resistance monitoring knot The results show that the surrounding rock reinforcement effect of high extraction roadway is good, and the anchor cables play a more balanced role in its support efficiency, ensuring the safe and efficient production of the mine.

Aiming at the problem of uneven large deformation and failure of support failure of slabs in the large section roadway caused by bottom pull in the 3309 transportation lane of Sangshuping No. 2 Well, the method of numerical simulation was used to study the surrounding rock of the roadway during mining. The change characteristics of the principal stress difference reveals the non-uniform deformation mechanism of the surrounding rock in the large section of the double-lane working face. The results show that: (1) The peak stress of coal pillar slab during primary mining is 7.93MPa higher than that of coal wall. During secondary mining, the peak stress of coal pillar slab is 12.96MPa higher than that of coal wall. The gang is deformed asymmetrically. (2) During the second mining period, the main stress difference of the 3309 transportation lane coal pillar sill increased by 11.46MPa and the stress concentration factor increased by 1.63 compared to the primary mining period. Compared with the coal wall during one mining period, the principal stress difference increased by 27.46MPa, and the stress concentration factor increased by 3.92. The surrounding rock as a whole was in a state of high shear stress, and the deformation and damage were serious. (3) The use of ?32×2500mm self-tapping bolts for the main side of the 3309 transportation lane, and the use of ?32×3500mm self-tapping bolts for reinforcement and support for the secondary side can achieve a good surrounding rock control effect.

In order to solve the problems of low layer fully mechanized caving face and upper layer fully mechanized caving face of super-thick hard coal in compound area of Huojitu mine, there are some problems in the process of stoping, such as poor coal caving effect at the tail end of the working face and too much coal in goaf. According to the geological conditions of coal seam mining in composite area, the main factors affecting caving property of top coal caving working face are analyzed, and the technology of pre-weakening the top coal at both sides of working face by using high-pressure hydraulic pre-fracturing and high-pressure gas deep-hole pre-cracking is put forward. Through the implementation of the No.206 working face in the 12 lower coal seam, it is shown that the coal caving effect is improved after the use of high-pressure hydraulic pre-fracturing technology, but the effect is not good, the top coal recovery rate is only about 50-70%. The new technology of high pressure gas deep hole pre-cracking can weaken the top coal pre-cracking, produce a large number of cracks, and enhance the top coal caving property. The recovery rate of top coal can reach about 85%, at the same time, it can release the stress of the overburden coal, and prevent the sudden collapse of the roof of the tail section in the mining process, causing the support to die. The application of solid gas pre-cracking technology can weaken the hard top coal in advance, enhance the caving property of top coal, reduce the lump coal rate, improve the recovery rate, and reduce the apparent strength of periodic pressure, thus providing an effective guarantee for the safe production of top coal caving.

In view of the problem that the gas emission of Y484 working face of kailuan (group) co., LTD. Tangshan mining branch is affected by the change of surface atmospheric pressure, the ventilation resistance of working face is measured and analyzed, and the relationship between the change of surface atmospheric pressure and the gas emission of working face is analyzed. based on the calculation of ventilation network and ventilation pressure regulation, the reasonable position and area of regulating pressure of Y484 working face were found out. Relying on the mine monitoring system, the surface atmospheric pressure and working face gas are monitored in real time. According to the monitoring data, a set of pressure regulating device that can realize automatic control is developed. When the local atmospheric pressure and the gas on the working face reach the set value, the pressure regulating device can be automatically opened to achieve the purpose of restraining the gas gushing out of the goaf on the working face, reducing the gas concentration on the working face and realizing the safe and efficient production of the working face.

Abstract: in the process of separating coarse slime, the bottom flow of the cyclone group is fine and the effect of degrading of the arc screen is poor. After the analysis and study of the Tianhong coal preparation Co., Ltd., the large diameter cyclone and the laminated vibrating screen are used together for the fine classification and ash reduction of coarse slime, and the classification process model of coarse slime is innovated, and the coarse coal is effectively reduced in the coarse coal. The content of high ash and fine mud has been popularized and applied in the coal preparation plant of Pingma Shenma Group, and the effect is remarkable.

The stability control of gangue roof is one of the key technologies to be solved urgently in the safe mining of interbedded coal gangue roof face. In order to find out the effect of thickness gangue on ground pressure behavior of interbedded coal gangue roof face, the physical similarity simulation experiment method was used to study the roof failure migration law and abutment pressure distribution characteristics of different thickness conditions of gangue. The results show that when the thickness of the gangue layer is thinner, the collapse of the gangue layer is more fragmented after mining. When the thickness of the gangue layer is thicker, the collapse fragmentation of the gangue layer is larger. With the increase of the thickness of the gangue layer, the number of roof caving before the support decreases in turn, and the roof caving angle at the working face increases in turn. The periodic caving step is 14.7m in the stage without inclusion, which increases from 12.3m to 15.8m with the increase of thickness of inclusion. The peak abutment pressure and its influence range increase with the increase of the thickness of the gangue layer, and the distance between the peak abutment pressure and the working face decreases with the increase of the thickness of the gangue layer. The stability control measures of gangue layer roof, such as advancing support with contacting roof to control the stability of gangue roof and shallow truncation and deep Protection, are put forward to ensure the safe mining of interbedded coal gangue roof face.

In order to solve the problem that the stress of coal pillar is different with time and space position, and the distribution characteristics and laws are not clear in the current open-pit coal mining technology, this paper takes an open-pit coal mine as a case study, and uses FLAC3D numerical simulation method to analyze the dynamic stress distribution of single side coal wall and supporting coal pillar, the stress distribution characteristics of coal pillar in the section and the stress of permanent coal pillar distribution characteristics, get the relevant laws. The results show that: the single side coal wall is in the area of increasing lateral supporting pressure of the working face; the stress concentration appears in front of the supporting coal pillar, and the stress distribution presents the "Hump" type; after the end of the section mining, the stress of the coal pillar in the section increases with the mining depth, and the stress decreases gradually; the stress distribution of the permanent coal pillar presents the "peak" type in the mining process, and there is an elastic core in the middle of the coal pillar district.

Traditional method about micro-seismic monitoring and forecasting always use the micro-seismic events number, frequency and so on, cannot judge on the event itself. Based on previous studies, and refer from the natural seismic energy theory, this paper introduced a new source energy theory to establish the equation about micro-seismic and source energy, and expressed the micro-seismic source energy by explosives equivalent. We can obtain the relationship of magnitude, source energy and explosive charge. And according to the focal point micro-seismic energy, it can derive mine earthquake magnitude. Field studies have shown that, this method can be effectively applied to micro-seismic monitoring and forecasting.

In view of the many factors of coal seam pre-pumping, it is not possible to accurately predict the distribution of residual gas content, based on the theory of coal & rock physical strength to analyze the influence factors of residual gas content distribution, and based on the PingQing coal mine 117802 back-mining work surface as the research object, the residual gas content distribution law and control mechanism under the influence of different factors. The results show that the residual gas content of the back-mining surface is discrete and high-concentration distribution, mainly controlled by the pre-pumping time and combined stress action of mining activities and geological formations, and the residual gas content shows obvious characteristics of the compound stress action area, which decreases regularly from the concentrated stress to the discharge area, in order: narrow coal column concentrated stress, wide coal column concentrated stress , the mining area - coal column area - fault zone co-influence, the extraction area discharge pressure and the mining area - fault zone joint discharge pressure; the residual gas content and the pre-pumping time show a negative correlation, the average value after 2 to 6 months of pre-pumping is greater than 8 m3/t, the average value after the pre-pumping 7 to 10 months is less than 8 m3/t.

A self-made transparent T-type bifurcation pipe was used. Ignition by the branch and test the change of photoelectric signal, ion current, temperature signal and overpressure signal during the propagation process of gas explosion flame front in the branching pipe that is completely closed at two ends and weakly closed at one end. The results show: The gas explosion flame in the T-tube is distributed to three ports, showing three typical states of layered flame, oscillating flame and deflagration flame. During the propagation of the flame to the completely closed branch pipe and the right end of the straight pipe, the velocity and ion current intensity are small(maximum 1.32m/s, 0.024μA), and the propagation to the weak closed end of the straight pipe is relatively large(maximum 33.17 m/s, 0.31 μA), all differ by an order of magnitude. The peak temperature of each section is the branch 1042K> branch pipe 928K> straight pipe left side 793K> straight pipe right side 669K. The peak over-pressured value of each section is the branch pipe is 0.162 MPa>the right side of the straight pipe is 0.135 MPa>the left side of the straight pipe is 0.036 MPa. During the propagation of the detonation flame to the closed end, the reverse flow phenomenon occurs due to the negative feedback of the compression wave. Especially during the propagation to the branch port, due to the existence of the wall of the bifurcation, under the combined action of the negative feedback of the compression wave and the positive feedback of the high temperature gas product, the flame presents a state of oscillation.

In order to analyze the deformation and failure mechanism of the slopes on both sides of the loess gully under the condition of shallow coal seam mining , based on the coal seam mining geological conditions of the Shenyan gully area in the Longan coal mine ,research methods including the three-dimensional numerical simulation calculation and theoretical analysis, are combined to study the stress distribution law of the overlying rock mass,the displacement distribution law , the deformation and failure characteristics and the instability failure process of the slope after coal seam mining .The results show that the displacement of the slopes on both sides of the valley is mainly in the vertical direction, and the horizontal displacement of the slope points to the center of the goaf. The slope can be divided into four deformation zones according to the deformation characteristics: the overburden collapse area within a certain height above the goaf; the loose soil subsidence area in the middle of the goaf; the pull-dump area between the loose soil subsidence area and the surface moving boundary; the unaffected area outside the surface moving boundary.The instability and deformation process of the slope can be divided into four stages: central subsidence - both sides and trailing edge cracking - shear deformation - instability failure.

The shape of throw-blasting has an important influence on the total work quantity and cost of the stacking system, the parameter of the work-face design of the subsequent casting link, etc. Aiming at the current problems of insufficient sample size of the muck-pile shape and of the influence of incorrect data on the prediction effect, a standardized analysis and treatment method of muck-pile shape are put forward. The methods include the construction of muck-pile’s database, the selection and classification of the work-face shape characteristics, and the selection and classification of the muck-pile shape characteristics. It realizes the fast processing of massive muck-pile shape data. And it improves the effectiveness of samples. Finally, three groups of typical muck-pile shape curves with general interpretation significance are obtained by Lowess. The methods are fast, efficient and convenient, which provides an accurate basis for the design of the technology of throwing blasting and dragline casting in the open-mining.

Conveyor belt deviation is one of the common faults of belt conveyor. At present, manual periodic inspection method is widely used to detect faults. It has many shortcomings, such as high danger, low efficiency, high labor intensity of the inspectors, lack of real-time detection function. Meanwhile, when the faults are found manually, serious losses are often caused. Aiming at the above problems, this paper studied the on-line detection technology of conveyor belt deviation fault based on image processing technology, an improved Canny operator edge detection method based on guided filter and OTSU is proposed, then Hough transform is used to extract and analyze the edge straight line features. Finally, the on-line detection and classification fault alarm of belt deviation are realized. The system has the advantages of non-contact, high detection accuracy, good real-time performance, and good application effect. It promotes the continuous and efficient operation of belt conveyor and lays the foundation for realizing unattended of belt conveyor in coal preparation plant.

In order to solve the problem that the fault feature is not obvious when the single phase ground fault occurs in the mine power supply system, the wavelet packet method is easy to select the wrong line.this paper proposes a line selection method based on CEEMD and wavelet packet. In this method, firstly, the zero sequence current is decomposed by CEEMD, the high frequency IMF1 component obtained by decomposition is extracted and wavelet packet transform is carried out, the sum of wavelet packet energy of each frequency band is calculated and sorted, the characteristic frequency band is determined according to the principle of maximum energy and the polarity of the maximum value of wavelet packet decomposition coefficient is compared, and the line with opposite polarity is determined as the fault line. 35/6kV simulation model of mine power supply system is built by RTDS. The simulation results show that this method has better accuracy of line selection, and is less affected by different fault factors, and has higher accuracy of line selection under different fault conditions.

Based on the servo triaxial compression test system of coal and rock mechanics and acoustic emission monitoring method, the different loading mode tests of coal and rock in hujiahe mining area are carried out, and the macroscopic mechanical performance and damage characteristics of coal and rock under uniaxial, conventional triaxial and dynamic static load combination tests are compared to explore the mechanism of induced rockburst. The results show that under the conventional triaxial condition, with the increase of confining pressure, the strength of coal rock increases gradually, and the energy storage capacity of coal rock increases gradually; with the increase of dynamic load frequency, the strength degradation of coal rock becomes more obvious, and the coal rock changes from plastic deformation to brittle failure after the dynamic load disturbance; the dynamic load damage is more severe and rapid than the static load damage, which makes the coal rock in failure There are obvious differences in forms. The whole coal rock is broken into several coal blocks with different particle sizes, and some areas are ground into powder.

In order to evaluate the control of rocks in roof and floor coal seam on coal seam hydraulic fracturing fractures, cores of coal and coal seam roof have been served in rock mechanical parameter test to get rock mechanical parameters, including compressive strength of coal and rock, tensile strength, elastic Modulus and Poisson's ratio. The tested core depth is returned to the sonic log depth. After the sonic log response is standardized, the core longitudinal sonic time difference is calibrated. The relationship between the mechanical parameters of coal and rock and the time difference of longitudinal waves is fitted. Moreover, prediction model of rock mechanical parameters based on the response of sonic logging is constructed which is used to calculate the mechanical parameters and ratios of coal and rock. The differences in rock mechanical properties between coal seam and roof and floor are evaluated. These results show that the elastic modulus of the roof rock in the study area is generally more than 6 times larger than that of the coal seam, and the compressive strength is more than 5 times larger than that of the general coal seam. Therefore, coal seam fracturing fractures are easily controlled in the roof but not in the floor. In the southeastern part of the study area, hydraulic fracturing fractures can easily reach the roof and floor.

The channel wave seismic exploration technology has been applied to find out the geological factors of hidden disaster before mining. But at present, there are few researches on the occurrence and characteristics of channel wave in main mining areas of China. So, We establish the numerical models of different surrounding rocks corresponding to different mining areas for forward forward simulation. Then, based on the actual channel wave data of nearly 40 coal mines, the statistical analysis of the data is carried out, and the occurrence and development characteristics of the channel wave are obtained. The results show that the velocity and frequency of the channel wave are similar in the same large area because of the similar strata. The velocity of the channel wave is inversely related to that of the surrounding rock, the higher the surrounding rock velocity, the lower the channel wave velocity. The structural development of the mining area is related to the conditions of the coal seam channel wave conductivity, and in the area with simple structure, the occurrence of channel wave is better. The results can be used as a reference for the interpretation and analysis of practical data.

In order to explore the effect of particle size of different coal seams on the apparent activation energy of coal spontaneous combustion, combined with the coal spontaneous combustion program temperature system, the programmed temperature rise test was carried out on coal samples of different sizes in three coal seams of Qinglong Coal Mine. At the same time, the oxygen consumption rate, CO and C2H4 generation law of each group of coal samples are analyzed, and the critical temperature point and dry cracking temperature point of different coal samples can be obtained. According to the result, the low temperature oxidation process of coal is divided into three stages. The apparent activation energy and pre-exponential factors of different stages of each coal sample can be obtained by processing the experimental data by the established oxygen-dependent rate Arrhenius formula. The results show that for the coal samples in the same stage of change, the apparent activation energy will increase with the increase of the particle size. For coal samples of the same particle size, if the pre-exponential factor of the S1 phase changes little, the apparent activation energy will gradually increase as the reaction progresses；If the pre-exponential factor of the S1 phase changes greatly, the apparent activation energy of the S1 phase are greater than the energy of the S2 phase. The 5~7mm particle size is used as the critical particle size, and the apparent activation energy of the S1 and S2 phases are relatively larger than the apparent activation energy of other particle sizes. Coal samples with mixed particle sizes have small apparent activation energy at each stage. By comparing and analyzing the apparent activation energy of coal samples from three coal seams, it can be seen that, under the same condition the difficulty of spontaneous combustion in 17# coal seam is relatively large, followed by 16# coal seam and 18# coal seam.

As a paste filling material for coal mines, ammonia-containing fly ash will not only affect the filling environment, but also affect the performance of the filling paste, which will affect the safety of coal mine filling. This experiment analyzes the ammonia source of fly ash, tests the ammonia content of fly ash, and conducts experimental research and mechanism analysis on the influence of ammonia fly ash on the performance of the filling body. The results show that the ammonia content of fly ash is 0.16%, which exceeds the normal standard, which leads to the release of irritating gas during the filling process, which affects the construction environment of the goaf. The ammonia content of fly ash will lead to the prolongation of the filling paste and the strength. It decreases, and as the ammonia content increases, the effect on the paste performance is more serious.

In view of the fatigue cracking of joint plates caused by vortex-induced vibration of steel tubular members in UHV engineering, the surrounding environment analysis, Vortex frequency identification, vortex-induced force calculation, stress analysis of the solid model of the joint plate and the estimation of the minimum cracking time are carried out. The results show that there is obvious stress concentration at the outermost edge of the stiffening rib in the middle of the joint plate when the member occurring weak axis vibration. The maximum stress amplitude can reach 77.83 Mpa. In theory, the fatigue cracking near the stiffening rib of the cracked joint plate may occur within 4-5 months, which is consistent with the multi-source fatigue cracking indicated by SEM. In order to avoid the occurrence of such events, the following work should be carried out by standardizing the Vortex amplitude control index and developing more flexible vortex characteristic monitoring means.

Aiming at the daily inspection of the running status of the substation equipment in the underground coal mine, the implementation of the safety measures of power outage and transmission, and the full coverage of video surveillance, a linear track inspection robot system is designed to communicate with the substation equipment and establish an intelligent inspection system. This paper mainly introduces the structure and function of the intelligent inspection system of the robot in the mine substation, and discusses the operation mode and execution flow of the intelligent inspection system. The practice shows that the intelligent inspection system can effectively replace the manual inspection post in the mine substation, complete the daily inspection task, ensure the reliable implementation of the safety technical measures of power outage and transmission, and realize the video of the substation without blind area monitoring. The robot system has complete sensing function, reliable linkage with substation equipment, stable running state of patrol inspection, and solves the key technical problems of reducing staff and increasing efficiency in the mine substation.

The development of belt conveyors in coal mines towards high belt speeds, long distances, and large volumes. Long inspection distance and high-speed belt conveyor increase the labor intensity and safety risk of inspection staff along the belt conveyor. This paper design a set of automatic trackless inspection robot suitable for the side of the belt conveyor roadway according to the layout conditions of underground coal mine transportation lanes. Inspection robot can realize autonomous walking, parking when meeting people, and automatic return through the extraction and recognition of the path features by the equipped visual recognition system. It also can realize the functions of information collection, transmission, and alarm of dangerous working conditions of infrared thermal imaging, video, audio, gas concentration, noise and other signals by the information collection system which can provide data support for the monitoring of the running status of the belt conveyor. Through the underground field test, the effectiveness of the entire system is verified, which lays the foundation for the unmanned patrol inspection of underground transportation lanes.

Aiming at the problems of narrow space in coal mines, high concentration of dust and gas, and the shortcomings of large-capacity electrolytic capacitors in traditional mining power supply rectification stages, such as short life and poor thermal stability, seriously affecting the reliability of rectifiers and the safety of underground coal mine personnel. This paper designs a VIENNA power factor correction (PFC) boost rectifier without electrolytic capacitors. By adding an improved buck-boost converter to the DC bus to decouple the active power in the DC link, the voltage ripple is forced to transfer to the auxiliary capacitor. So that the DC link capacitance is significantly reduced. Therefore, bulky electrolytic capacitors can be replaced with small film capacitors with high reliability. This article first introduces the relationship between the DC bus capacitors and DC-side voltage ripple of the VIENNA rectifier, then explains the realization principle of no electrolytic capacitors and the method of quantitative parameter design. Finally, the validity of the theoretical analysis and parameter design method is verified by simulation。

In view of the problem that the advanced support technology of the fully mechanized mining face of Tashan Coal Mine of Tongmei Group has repeated roofing, it is easy to cause the roof to be broken, the number of operators is large, and the labor intensity is large. Based on the roof of the fully mechanized mining face of the middle thick seam of Tashan Coal Mine of Tongmei Group The law, combined with theoretical calculation design, developed a new vehicle-mounted advanced no-repetition support process equipment and completed industrial tests. The test shows that the use of the roadway without repeated support equipment effectively avoids the phenomenon of repeated support of the existing lead bracket during the support process, and the number of support workers is reduced by 70%, and the mechanization of the advance support is realized, which proves the dehumanization of the process. The advantages and advancement of the operation provide an effective way for the development of new intelligent mines with the characteristics of “intrinsically safe mines, high-efficiency mines and clean mines”.

Aiming at the occurrence of coal mine safety accidents caused by risk and hidden danger factors,this paper combines Internet technology with relevant laws and regulations of national coal mine safety, based on B/S mode, adopts layui design framework, JavaScript and Java language technology, puts forward the design and research of double prevention information management system for coal mine safety. By defining the target of system research and development, designed the overall architecture of the system, elaborated the system management mechanism and the function, used the FP-Growth algorithm to discover the relevance of hidden data in multi-dimensions. The system realizes the real-time support for the work of post personnel by the multi-terminal intelligent linkage mode; improves the level of coal mine information management through the visualization of risk information; carries out real-time statistical analysis of risk and hidden danger information, and provides technical support for the double prevention decision-making of coal mine safety.

Green coal mining is of great strategic significance for national energy security and ecological civilization construction, and it is necessary to establish an effective government supervision system. This paper takes the implementation of green mining in coal enterprises as the research object, establishes an evolutionary game model through the game scenario setting of government departments and coal enterprises, discusses the game interaction and strategy adjustment process between government departments and coal enterprises, and numerically simulates the impact of parameter changes of all parties in the game on the results. The results show that: reducing the cost of supervision and management of government departments, improving their supervision ability and willingness, increasing the implementation of accountability mechanism and the punishment of enterprises are helpful to guide coal enterprises to implement green mining, among which, reducing the cost of supervision of government departments, improving the ability of government supervision and increasing the punishment of enterprises are three good measures Policy guidance effect. Through the research of this paper, we hope to provide a reference for the government to guide the green mining of coal enterprises to establish a reasonable regulatory policy.

Coal mine safety management system is an important means to maintain the order of coal mine safety production. Good rules combined with the implementation of the system can play the effectiveness of the system, but high implementation intensity means the increase of management cost. This paper discusses the impact of the characteristics of system implementation on the effectiveness of the system, so as to provide a reference to improve the effectiveness of the system under resource constraints for coal mines. Based on the attitude theory and reinforcement theory of psychology and behavior discipline, this paper puts forward the basic viewpoint that the subject of coal mine safety management system has a specific tendency to the cognition of the system rules system, and then forms the system compliance will, and the system implementation system regulates the relationship between the system compliance will and the system behavior. On this basis, under a specific level of system compliance will machine learning method is used to simulate the impact of system implementation characteristics on the emergence of system compliance behavior, and to help to reveal the appropriate intensity of system implementation.