In order to determine the reasonable section coal pillar size of the impact ground pressure mine, taking the 21103 working face of the cucurbit coal mine as the research background, the theoretical method is used to calculate the width of the coal pillar limit equilibrium zone, starting from the two aspects of coal pillar stress and surrounding rock deformation. The numerical simulation calculations under different coal pillar widths were carried out, and the coal pillars of 21103 auxiliary transport roads were monitored by 4m, 6m, 8m, 10m, 12m, 14m, 16m, 18m, 20m, 22m and 24m. The width of the section coal pillar is 9.1~10.7m. The numerical simulation results show that the stress of the coal pillar increases first and then decreases with the increase of the width. The stress is the lowest at 5m and the highest at 15m. The displacement of the top, bottom and left side of the roadway is inversely proportional to the width of the coal pillar. The displacement of the right dam first increases and then decreases. When the coal pillar is 10m, the displacement is the largest. The simulation results of the comprehensive stress and surrounding rock deformation suggest the section coal pillar 5 -10m is suitable; the measured data analysis shows that the reasonable coal pillar width is 10-12m. Finally, the optimal width of the coal pillars in the cucurbit coal mine section is 10m.

In order to solve the problem of difficulty in controlling the surrounding rock of the roadway along the goaf in the third panel of Tashan Coal Mine of Datong Coal Mine Group, Datong Coal Mine Group has developed the chain-saw cutting roof pressure relief technology. In this paper, the application effect of pressure relieasing with chain-saw is studied in the field. The research shows that as the mining of the 8311 working face advances, the coal pillar and coal body deep stress in roadway 2312. It shows the form of increasing first, then decreasing, and finally stabilizing, and the peak stress of the surrounding rock in the test section of the chain-saw joint is generally smaller than that of the test section without the roof cutting operation, indicating that the pressure relief effect of the chain-saw cutting roof is good. The research in this article has guiding significance for the popularization and application of cutting roof and pressure relief with chain-saw.

Based on the analysis of the main factors affecting the selection of mine auxiliary transportation modes, the paper puts forward the applicable conditions of various kinds of auxiliary transportation modes. The existing trackless transportation system and the track transportation system are divided and compared in detail, this paper expounds the advantages of the trackless transportation system from several aspects such as transportation capacity, transportation speed, number of auxiliary transportation personnel, transfer links, occupying equipment, auxiliary work, etc. , the characteristics of less reloading links, fast running speed, large carrying capacity, fast running speed, less assistant personnel and low transportation cost are presented. Finally, it is put forward that popularizing trackless transportation system in newly-built mines and technical transformation mines can realize the reduction of personnel and increase efficiency, the construction of high-yield and high-efficiency mine is of great significance.

Open-pit mining is an important way to develop mineral resources. In view of its high transportation costs, poor coordination of fleets, and large mobility of drivers, this paper analyzes the unmanned driving of open-pit mines based on the particularity of its operating environment, such as low crowd flow and fixed transportation routes The actual needs of system construction, summarized the development of domestic and foreign unmanned mining cards and the technical characteristics of the system, and summarized its key technologies, including positioning, perception, decision-making and planning, and then analyzed the development trend.

A box-shaped steel column plug-in splicing joints are investigated taking as the object in paper. On the basis of reasonable selection of node judgment criteria and material constitutive relationship, finite element software ABAQUS is used to analyze the mechanical performance of the BASE specimen under monotonous loading. Then, by changing parameters such as axial force ratio, inner tube length, inner tube thickness, flange plate thickness and pre-tension bolts forces, the mechanical properties of joints under different parameters are obtained. The analysis shows that the plug-in splicing joint is a convenient and feasible method for the column connection of assembled steel structure.

In order to study the changing law of the force on the wall of the VSM caisson, the sinking process and the force characteristics of the VSM caisson were analyzed based on the characteristics of the construction technology. First, according to the sinking characteristics of the VSM caisson, the loads received during the construction process are sorted out, and the typical movement state of a sinking cycle of the caisson is divided. Then, based on the GGMeyerhoff formula and specifications, the sinking resistance of the caisson is determined. Analyzed and calculated, put forward the calculation formula of the blade foot resistance considering the flooding in the +well, and established the construction mechanics model of the typical state of the shaft wall; finally, the geometric parameters of the caisson, the sinking resistance, and the sinking resistance were calculated by taking the mine shaft engineering as an example. The relationship between sink depth and suspension force. The results show that the suspension force of the VSM caisson does not always increase with the increase of the sinking depth, but first increases and then decreases, with a maximum value; the thickness of the well wall directly affects the resistance and The changing law of the sidewall friction resistance indirectly affects the sinking depth of the caisson; the suspension force of the caisson changes with the change of construction conditions. The design of the suspension capacity of the caisson equipment should be comprehensively considered according to the actual situation; The mine caisson wall with an inner diameter of 6m and a thickness of 0.5m has a maximum sinking depth of 56m under the condition of f=8kpa; designing the performance of drag reducing mud according to the sinking depth is an important means to control the sinking resistance and achieve system optimization.

In order to ensure the safe pushing of the 2201 working face of Wangcaihuopan coal mine in the overlying large-area housing mining area and the adjacent housing mining area outside the return air tunnel, analyzed the risk of coal spontaneous combustion of overlying housing mining area in 2-2 upper coal seam and the adjacent housing mining area in 2-2 coal seam during the mining process of the 2201 working face combined with the actual situation of the production site, and the main air leakage channels and areas are obtained. The results showed that the air leakage passage between the housing mining area and the working face is mainly the compound goaf formed by the roof collapse and the housing mining area, which has a certain risk of coal spontaneous combustion. For this reason, targeted coal spontaneous combustion prevention and control technologies have been put forward from the aspects of coal spontaneous combustion indicator gas monitoring, goaf grouting, nitrogen injection, and wind plugging prevention technologies, which effectively suppress and prevent coal in old goaf areas and ensures the safety of the 2201 working face.

Aiming at the problem of coal and gas outburst happening in the process of coal roadway excavation, the theoretical analysis of the width range of the pressure relief zone of the coal body in the coal roadway face is obtained. The pressure zone width is affected by many factors such as coal seam interface friction factor, coal body tensile strength, coal seam thickness, coal rock bulk density, lateral pressure coefficient and coal seam mining depth. The grey correlation analysis method is used to determine the coal side pressure coefficient as the main control factor of the unloading zone width, and the correctness of the numerical analysis of the unloading zone width is verified. It is put forward that external load should be applied on coal roadway driving face to destroy the integrity of coal body, increase the lateral pressure coefficient of coal body so as to increase the width of pressure relief zone, and realize the increase of coal body thickness to resist gas outburst and reduce the occurrence of outburst accidents. The research conclusion provides theoretical guidance for the study of coal and gas outburst in the driving face of coal roadway.

In view of the serious deformation of the easily weathered surrounding rock roadway, the traditional shotcrete technology has the problems of large pollution and slow construction speed. Based on the background of the north lane of rowing machine in Liupan District of Changping Mine, the lithology of the roadway roof is analyzed, and puts forward the sealing technology of thin layer rapid spraying.The results show that there are a lot of kaolinite, siderite and muscovite in the sandy mudstone layer of roadway roof, which is easy to expand and break when encountering water.The results of numerical simulation and field test show that the effect of thin-layer rapid spraying is good. After spraying, the deformation of roadway, the separation of roof layer and the stress of support body are obviously reduced. The amount of construction rebound is small and there is no dust. The spray footage of a single shift can reach 8-10 m, and the optimal thickness of spraying is 8 mm or 10 mm. When the spraying thickness is 15mm, the wire mesh can be used to replace the steel mesh for roadway support.

In order to solve the problem of gas extraction in coal mines, the " delta mode" layout method is used to shorten the interval between drainage holes, which effectively eliminates the blank zone of the gas, and at the same time brings the problems of increased number of boreholes and repeated drainage in some areas. Through theoretical calculation, the paper puts forward the design scheme of inscribed polygons in a circle and optimizes the best implementation scheme. At the same time, the optimization was performed in combination with the rock cross-cut uncovering example. The results show that compared with the traditional design of outburst prevention drilling, the engineering of the circle inscribed hexagon- when the effective extraction radius is R, the optimize drilling lay outing along the coal seam borehole distance of √3R, and lay outing inclination the coal seam borehole distance of 1.5R- is reduced by 3792m and the reduction rate is 23%, which has important theoretical significance and practical value.

In order to increase the lump coal rate of the fully-mechanized mining face, the shearer drum with high lump coal rate based on optimization of shearer parameter has been developed, combined with the actual situation of Yifeng Coal Mine. Moreover, the parameter and arrangement of coal wall presplit blasting of the mining face have been proposed. The experimental results have shown that: the lump coal rate of underground mining face increased 4.34% by adopting the shearer drum with high lump coal rate; the lump coal rate of underground mining face increased 14.22% by coal wall presplit blasting in the mining face; the lump coal rate of underground mining face increased18.56% by the combination of the shearer drum with high lump coal rate and wall presplit blasting in the mining face, which is the effective way to increase the lump coal rate of the fully-mechanized mining face.

In order to solve the technical problems of long inversion period, low ray coverage and unreliable results in deep and dangerous working face, the integrated wave velocity inversion technology of active and passive seismic wave is proposed to monitor and early warn the shock risk. Based on SIRT algorithm, the wave velocity inversion is carried out in the monitoring area and the stress distribution is analyzed. The inversion period is greatly shortened. The early warning index of the technology is used to quickly obtain the impact dangerous area. Taking the 2309 working face of Anju mine as an example, the method of comparing single day wave velocity CT inversion with continuous six day wave velocity CT inversion is proposed, and the stress distribution law of deep impact dangerous working face during mining is studied in depth. The research results show that during the working face mining, the technology accurately predicts the high stress distribution area in the working face and determines the impact risk level. Combined with the field drilling test, the accuracy of the inversion and early warning of the technology is verified, and the application effect is good.

In order to study the effect of blasthole arrangement on blasting pressure relief in the steeply-inclined coal seam, three kinds of pressure-relief blasting projects were carried out on the +450 horizontal No. B3+6 fully mechanized top-coal caving face of Wudong coal mine. The comparison found that: for the shallow rock, after the blastholes were encrypted, the daily average energy and frequency of microseismic events decreased significantly, and the stress concentration in the vicinity of the working face weakened, and the pressure relief effect was improved. Compared with the deep body boreholes, the alternating arrangement of shallow holes and shallow rock boreholes was dominant, the stage pressure relief project is more effective in reducing the stress of the working face, in which the pressure drop is more obvious in the areas where the shallow holes are alternately arranged. The research results have certain guiding significance for further improving the prevention and control of rockburst.

In order to solve the problems of poor gas permeability and difficult gas drainage in broken and outburst coal seams in Xinjiang, a variety of hydraulic measures to increase permeability are applied to the gas extraction of broken soft outburst coal seam. High pressure hydraulic cutting and hydraulic fracturing tests were carried out in No. 4 coal seam of Aiweiergou mining area in Xinjiang, and comparative analysis was made from the aspects of extraction concentration, pure flow, attenuation, construction period and construction process. The research shows that the extraction concentration and the pure flow rate after hydraulic cutting and hydraulic fracturing show a pattern of increasing first, then attenuating, and finally stable. The average single hole concentration of the hydraulic cutting extraction hole and the hydraulic fracturing extraction hole was increased by 7.7 and 5.7 times compared with the ordinary dense extraction hole, respectively, and the average pure flow rate of the single hole was increased by 3.4 and 2.1 times, respectively. After the return period, the drainage pure flow rate decayed exponentially, and the former decayed significantly faster than the latter. After the adoption of hydraulic measures, the amount of drilling work has been greatly reduced, and the total construction period has been significantly reduced.

In view of the small working space, poor working environment and limited equipment capacity, the existing hydraulic fracturing and aggregate antireflection technology can not be directly used in the coal mine. The emulsion pump commonly used in the working face, combined with the high-pressure aggregate bin, high-pressure pneumatic control valve, etc., were used to carry out hydraulic fracturing of two floor through layer boreholes in Pansan Coal Mine, Huainan mining area Field test of adding aggregate to enhance the permeability. The test aggregate is 20～40 mesh ultra-low density polymer. The length of fracturing section of two boreholes is 6.8m and 6.1m, and the amount of injected aggregate is 110.25kg and 176.5kg respectively. After the completion of the construction, the test results were investigated. The pure gas drainage volume of 100 boreholes is 2-15 times of that of conventional unfractured boreholes. Under the same aggregate type and specification, increasing the proppant proportion is helpful to improve the fracturing permeability increasing effect.

The shape of cast blasting pile in open-pit mine is extremely important for the evaluation of the blasting effect and the design of the subsequent stripping process. The laser scanning methods currently used in the field have many problems such as the equipment is heavy, the procedures is complicated, long time-consuming, restricted installation positions, safety risks in operations, and scan blind spots. In response to the above problems, after repeated field trials, the research puts forward a method for measuring the shape of the blasting pile based on the tilt photography of the drone. A detailed design of the field acquisition program is carried out, and the key algorithms of the internal data processing are analyzed: image matching based on the sift algorithm, three measurement of the beam method in the area cyberspace, and dense image matching based on PMVS. The research results show that the model error fully meets the level I accuracy requirements of the scale 1:500 surveying and mapping results. Compared with the traditional technology, the UAV surveying and mapping technology has high surveying and mapping operation efficiency, low equipment system cost, high safety factor, and fewer operators. Features such as accurate surveying and mapping results.

In order to further improve the filling efficiency and ensure the filling quality, a real-time compaction monitoring technology was used to study an evaluation method of vermiculite solid filling effect based on vibration behavior analysis. Based on the actual operation of the on-site filling process to compact the distance from the top of the mechanism, and based on the theory of vibration compaction, the mathematical relationship between the acceleration and the filling effect of the compaction mechanism is discussed, and a basis for the evaluation of the filling effect of the acceleration and the filling rate; By analyzing the compaction mechanism of the filling material, using the Compaction Value (CV) as the indicator of the compaction state of the filling material, the in-depth analysis of the acceleration waveform and vibration intensity of the compaction mechanism on the filling effect The rapid evaluation model for the filling effect of vermiculite material was established. The test results show that there is a strong correlation between the CV and the compaction of the filling body, and the regression model of the compacted degree has higher accuracy. This method can realize rapid evaluation of the filling effect, effectively improve the filling quality, and provide a new way to improve the filling mining efficiency.

In order to analyze direction of maximum principal stress on stability of surrounding rock, plastic zone, deviatoric stress and displacement during angle from 0°~90° are simulated by Flac3D. It is concluded that plastic zone area of “surrounding rock” is larger with the increase of α, and develop to depth of roof and floor. Deviatoric stress is a “single peak”, and peak of deviatoric stress of roof and floor increase with increase of α, but sides are opposite. Displacement also increases “linearly”, and direction of maximum horizontal stress on deformation of roof and floor surrounding rock are greater than that of the sides. The reliability of analysis results is verified by field observation.

Accurate characterization of overburden damage in coal mine goafs is very important for the evaluation of the stability of goaf sites. the damage of overburden can be characterized by using high-density electrical method to obtain the resistivity of overburden based on the characteristics of the resistivity change of the compressed rock . Based on the correlation between porosity, resistivity and volume strain, the expressions of rock resistivity and volume strain are derived, and use RFPA software to verify the resistivity characteristics of the compressed rock; a resistivity-based damage is established by analogy, and lead to the resistivity proportional coefficient to characterize the damage degree of overburden ; the method of resistivity detection, theoretical formula and the point-plane combination of borehole verification is used to determine the characteristics of the overburden three zones. The results show that the resistivity of compressed rock increases from the decrease of pore compression in the early stage to the increase of crack propagation in the later stage; the resistivity coefficient is greater than 1.6 at the overburden goaf and between 1.2 and 1. 6 in the vicinity of the goaf. In other areas, it is less than 1.2, which provides a theoretical reference for the determination of the overburden three zones.

Absrtact:In view of the problem that the airflow state of fully mechanized face can not change dynamically in real time and the dust source is moving continuously, which leads to serious dust accumulation in roadway. The orthogonal test scheme of dust field simulation under airflow control is designed. The influence of airflow control parameters on dust concentration distribution under dynamic change of dust source is analyzed by FLUENT software simulation , and the significance of the influence factors of the air outlet diameter, the horizontal deflection angle and the vertical deflection angle of the air duct is analyzed by the range analysis method. The air flow control scheme of the optimal distribution of the dust field is determined. The actual test of air flow control at 5m and 10m from the outlet of S1212 rubber transportation roadway in Ningtiaota mine shows that the average dust concentration of pedestrian breathing zone height on return side is reduced by 33.4% and 34.3%, and the dust concentration at driving driver is reduced by 45.3% and 40.4%, respectively. The results show that the air flow control scheme of outlet air outlet can be established according to the actual demand. Regulating the outlet airflow state can optimize the distribution of dust field, reduce dust concentration and improve ventilation environment.

In order to accurately determine the size of coal seam gas extraction radius, through the analysis of the characteristics of the existing measurement methods and the operability of the measurement process, it is found that a single index or a single method can't meet the requirements of extraction radius inspection. Considering the gas content and the pre-drainage rate as the evaluation index, the method of combining the Gas Reserves Method and the numerical simulation is used to investigate the extraction radius, and it is applied in the 3# coal seam of Gaohe Coal Mine. This method is obtained by examining the extraction radius of No. 3 coal seam in Gaohe Coal Mine. When the extraction radius is 1m, 1.25m and 1.5m respectively, the extraction compliance time is 57d, 70d and 76d; Using multiple indicators and multiple methods to examine the extraction radius is a method that can effectively measure the extraction radius, which can obtain the corresponding extraction radius at any time and has strong operability.

Taking the recently closed pit of Fushun West Open-pit Mine as the research object, a three-dimensional hydrogeological model was constructed using visual modflow, and the analysis of groundwater movement was performed. The simulation results show that the West Open-pit pit will converge to a stable elevation of 60m after the stoppage; The impact of pumping and strata, groundwater flows from the southwest to the northeast, and the Hunhe River changes from a drainage source to a recharge source. The results of the water balance simulation show that entering the pit area is 84141 m3/d, and the artificially discharged water is 56768 m3/d. The best solution; further establish a water resource optimization model and use MATLAB to perform optimization calculations. Urban water allocation is 6 million m3/a, industrial water allocation is 4 million m3/a, and ecological water allocation is 7 million m3/a. The results of the two goals of social benefits are better overall.

In view of the current technologies for preventing and controlling shock pressure disasters, which are mainly based on single physical quantity monitoring, Bayan Gaole Coal Mine combines "cloud technology" to integrate stress monitoring, microseismic monitoring, and cuttings monitoring and other data using a multi-parameter coupling early warning algorithm system The integration and establishment of a comprehensive intelligent monitoring and early warning platform for the impact of ground pressure risk realized the cloud real-time synchronous storage of raw data and analysis results. The application results show that the comprehensive intelligent monitoring and early warning platform for the risk of ground pressure can realize the automatic collection of multi-parameter data, joint monitoring and early warning and analysis, and the ability to perform the first analysis of ground pressure based on multiple parameters, which greatly improves the detection efficiency of ground pressure and reduces The economic loss of the mine.

In order to solve the problems of manual coal preparation and wet preparation method, such as inefficiency, high labor intensity, water consumption, environmental pollution. This paper studies the method of coal gangue recognition based on machine vision, builds a test platform in the laboratory, develops an application platform of MFC software, and realizes the real-time recognition of coal gangue; selects coal and gangue from Shanxi, Inner Mongolia, Shaanxi as samples, and establishes a sample image library; takes 420 images as experimental samples, and extracts the gray mean value, peak gray value, energy, entropy, contrast and deficit of samples The six features of moment are analyzed and counted; the particle swarm optimization (PSO) algorithm is used to optimize the support vector machine (SVM), and the classifier is trained and tested. The results of feature analysis show that gray-scale features have better discrimination than texture features; in PSO-SVM classifier test, when gray-scale, texture and combined features are used as input, the recognition accuracy is 95.83%、72.92%、 and 93.75% respectively, and the results show that gray features are the best input recognition effect.

Under the urgent requirement of improving the quality and efficiency of emerging energy industry, it is of great significance to actively promote the development of coalbed methane industry to alleviate the current domestic energy situation. The adsorption and desorption characteristics of coal reservoir constrained by formation stress are directly related to the layout of gas drainage operation. Based on this, this paper carried out an experimental study on the adsorption and desorption characteristics of methane under stress-constrained coal, and also carried out CT scanning test and analysis on the internal structure characteristics of coal after desorption of methane. The results show that: The relationship between the adsorption capacity of methane and pore pressure is almost linear, which accords with Langmuir model. It is considered that 80 ℃ is the reasonable temperature point for coal to desorb methane. After gas desorption, more pores will be formed and more secondary fractures will be developed. The porosity of different layers ranges from 6.32% to 9.38%, with an average porosity of 7.4%. In different types of pores, the proportion of pores and fractures with pore diameter less than 30 μ m is as high as 76.36%. Generally speaking, the pore fracture structure with small pore size is the main channel for methane desorption, diffusion and migration.

In this paper, a complete freeze-thaw process of Luohe formation sandstone is carried out by reducing the freezing process in the West and changing the freezing temperature. The quality and wave velocity of Luohe formation sandstone before and after thawing were measured. Based on the mechanical test, the influence of mechanical properties and confining pressure on mechanical parameters and failure characteristics of Luohe formation sandstone were obtained. The test results show that the Luohe formation sandstone has large porosity, strong water absorption capacity and good water saturation. After thawing, the mass loss rate is 5% and the wave velocity loss rate is 40%. That is to say, the Luohe formation sandstone is very sensitive to freeze-thaw action. With the decrease of freezing temperature, the frost heaving force inside the sandstone increases, and the damage intensifies. After thawing, the strength and deformation of Luohe formation sandstone are deteriorating and the deformation is increasing From the original single failure mode to the tension shear composite failure mode, the main crack becomes wider, accompanied by many secondary cracks.

In view of the current backward law enforcement level of coal mine safety supervision departments, irregular law enforcement supervision behavior and other industrial issues, the coal mine law enforcement system based on strapdown inertial navigation is designed by studying mems technology, inertial navigation technology, Bluetooth positioning technology, CS architecture technology and real time distributed database technology, the system includes three parts: the law enforcement terminal, the safety production law enforcement platform and the law enforcement supervision cloud platform, which realizes the standardization of law enforcement personnel law enforcement, the synchronization of underground law enforcement data, the accurate and autonomous navigation of law enforcement process, and the tracing of law enforcement track, it provides the credible law enforcement information for the cloud platform of coal mine law enforcement supervision.

The flotation kinetic model has guiding significance for describing the flotation process, and the flotation rate constant is the key parameter for model construction. In-depth study of the mathematical relationship between the rate constant and different variables can increase the accuracy and applicability of the model; compare the size of the rate constant under different operating conditions and observe its changes, and you can select better operating conditions to evaluate or optimize the flotation process , The type and amount of reagents, and the performance of flotation equipment provide more powerful tools. This paper introduces the continuous development of the flotation kinetic model along with the in-depth study of the rate constant, discusses the research progress of the flotation rate constant K value, and briefly describes the law and development of the time function and distribution function of the flotation rate constant And the role of K value in practical application. Put forward prospects for the continuous development of flotation kinetics, deeply explore the relationship between flotation rate constants and microscopic variables, establish new models, optimize fitting algorithms, and accurately solve the main parameters in the model, which will help to accurately express the float The selection process.

Abstract The pole-slot match of PMSM is one of the important factors that affect the cogging torque and electromagnetic characteristics of the motor. The cogging torque and back EMF harmonic will cause vibration and noise, which will increase the temperature rise of motor seriously. In order to ensure the safety and stability of mine submersible pump in emergency rescue of mine water disaster, this paper takes 132kW permanent magnet synchronous motor as the object, and focuses on the selection principle of pole-slot match with less cogging torque and less back EMF harmonics. Firstly, the generation mechanism of cogging torque is analyzed, and the analytical expression of cogging torque is derived. The influence of pole-slot match on cogging torque is analyzed, and the principle of pole-slot match selection to reduce cogging torque is proposed; Then three kinds of common pole slot matching schemes are put forward, and the finite element simulation model of PMSM is established respectively. The harmonic component and amplitude in the back EMF are analyzed, and the pole slot matching scheme with the least harmonic content and the back EMF waveform more close to the sine wave is obtained; Finally, three schemes of cogging torque are simulated to verify the correctness of the principle of reducing cogging torque. Based on the above two results, the pole-slot match scheme of high-power permanent magnet synchronous motor for mine submersible pump is obtained.

When the trackless rubber-tyred vehicle of explosion-proof diesel engine runs in a long distance and large slope roadway, there are some problems such as insufficient uphill power, intensified exhaust emission, short downhill braking life, etc. Based on the condition of long distance and large slope of 2# auxiliary transportation roadway in bulianta coal mine in Shendong, the advantages and disadvantages of several improved auxiliary transportation schemes are compared, and a more feasible new type of stringing trackless rubber-tyred vehicle scheme is selected. The power of the vehicle is provided by overhead catenary. The transmission system, current collecting system and insulation system of the stringing trackless rubber-tyred vehicle are mainly studied in the text. Functional tests of the stringing rubber-tyred vehicle has been enforced on the ground. The vehicle has sufficient uphill power, and more safe and reliable downhill braking performance by the combination of electric braking and wheel braking. It realizes low noise and zero emission of the trackless rubber-tyred vehicle in stringing roadway, and solves the running problem of the vehicle on long distance and large slope effectively.

In order to solve the problem of insufficient safety investment under the management structure of China's coal industry, an evolutionary game model of the first line of mines and headquarters under the unified regulation of the government was established from the perspective of evolutionary game based on the bounded rationality of both sides of the game. The dynamic equations were derived from seven evolutionary strategies of both sides of the game. Through model analysis and case verification, it was concluded that the choice of the stability strategy of the two parties was closely related to the supervision cost of the headquarters, the safety cost of the mines, the weight of the economy development index in the performance evaluation system of the group company, the mandatory investment amount of the unit BP. With the decline of the former three and the rise of the mandatory investment amount of the unit BP, the headquarters and mines tend to be strictly supervised and fully invested with greater probability. Finally, in order to urge the headquarters to strictly supervise and fully invest in the mines, relevant policy recommendations were put forward.

Abstract：Intelligent mine construction can change the original extensive development mode of coal enterprises，and is an important support to achieve high-quality development of coal mines. By describing the background of the development of intelligent mine，the paper analyzing the relevant policies and achievements of the current national and local governments on promoting the development of intelligent mine，and analyzes the management and technology problems encountered in the development of intelligent mine. From the four dimensions of equipment perception layer，network transmission layer，data support layer and application decision-making layer，the future development framework of intelligent mine is constructed，and the key technologies to achieve high-quality development of intelligent mine are proposed，including information network architecture，safety production management and control mode，intelligent decision-making and situation analysis mode. Finally，the countermeasures and suggestions to promote high-quality development of intelligent mine are put forward.