The traditional mining area is limited by many development subjects, and there are many problems in the surface spatial layout, such as resource waste, environmental pollution, imperfect layout, lack of unified whole life cycle planning and dynamic adjustment mechanism. In the layout planning of ground space, through scientific innovation, the concept of land space planning is introduced, and the relevant influencing factors are studied and analyzed, the spatial planning of mining area is combined with the layout of ground facilities organically, and the industrial site is centralized and planned by stages, which effectively solves the problems existing in the layout of traditional mining area, for the Xinjie Taigemiao Mining area to provide a blueprint for high-quality development.

Underground coal gangue intelligent dry separation was an effective technical means to realize green mining in coal mines. In order to deeply study the roadway design method of intelligent dry separation system, combined with the process flow of intelligent dry separation system, this paper summarized the design ideas, explored the determination method of gangue separation scale, analyzed the layout position of screening system, discussed the layout form of intelligent dry separation chamber, and studied the advantages, disadvantages and applicable conditions of intelligent dry separation system layout according to different types of main coal flow transfer and diversion points. On this basis, it was introduced that the engineering design case of double system at the lower entrance of coal bunker. The research shows that the roller screen arranged at the transfer point can avoid the transfer of large amount of end coal; The gangue sorting system is arranged at the lower opening of the coal bunker, which can deal with the instantaneous large volume of coal; The design mode of double system at the lower opening of coal bunker can provide reference for similar mines and has the value of popularization and application.

With the implementation of the 14th Five-Year Plan and the Made in China 2025 policy, China's continuous industrialization has put forward new requirements for the energy industry. As an important pillar of the energy industry, the intelligent construction of coal enterprises has become the key content and direction of the industry transformation and upgrading. Combining artificial intelligence, internet of things, big data, cloud computing and other intelligent technologies with traditional coal preparation process, realizing independent analysis, decision-making, learning, dynamic prediction and collaborative control of coal preparation plant has become the main goal of intelligent construction of coal preparation plant. In the process of intelligent construction, dahaize coal preparation plant has carried on intelligent transformation to its pressure filtration system. Through the research of intelligent filter press platform and integration of single filter press automation system, the self-judgment of the end state and the intelligent operation of the filter press are realized.

At present, the mode of land supply for open pit mining is "land requisition first, then transfer", and the lack of effective recovery and withdrawal mechanism, which makes it difficult to withdraw the reclaimed mining land. According to the regular of the open pit coal mining and periodic characteristics, the author explore a new subject of temporary land use patterns for open pit mining,which is helpful to improve the quality and scale of land use and reclamation in open pit coal mine mining, and It is also of great and far-reaching significance to explore and formulate reasonable land use policies for mineral resources development projects.

Due to its special hollow structure, the ultimate bearing capacity of hollow grouting anchor cable is reduced by more than 30% compared with the common solid anchor cable, which is difficult to meet the support requirements of deep tunnels in complex stress environment. The 2060mpa high-strength hollow grouting anchor cable has been studied and developed. After laboratory and field measurements, its ultimate bearing capacity has reached more than 660kn, and the mechanical essence of its tension dispersion type has been pointed out. In order to avoid the shear failure of the anchor cable caused by the horizontal movement of the roadway roof strata, the cooperative support technology of high-strength hollow grouting anchor cable and linear anchor cable bundle is proposed, and the cooperative support mechanism of the two support structures is explained. Taking the 1127 (1) transportation trough floor roadway repair project in Guqiao Mine as the background, the field test of the cooperative support technology of high-strength hollow grouting anchor cable and linear anchor cable bundle is carried out. The application results show that this technology can effectively control the large deformation of surrounding rock in deep high pressure roadway, and it is an effective roadway reinforcement method.

In order to solve the problems of large deformation, easy instability and difficult support in roadway support of broken surrounding rock when coal resources enter deep mining, a coordinated support scheme of scaffolding + bolts (cables) + grouting is proposed. The characteristics of surrounding rock structure stability and crack development were determined by drilling peep. FLAC3D numerical simulation compares and analyzes the stress and plastic zone distribution of conventional bolt-shotcrete support, bolt-grouting support and shed bolt-grouting collaborative support. The results show that the shed-anchor-injection synergistic support technology shows better support effect than the other two schemes, the plastic zone distribution range is obviously reduced, the stress concentration phenomenon is alleviated, and the simulated deformation of the support roadway is close to the engineering monitoring. The engineering test shows that: the roadway with conventional bolt mesh and shotcrete support and anchor injection support still has large deformation and cannot maintain long-term stability, and the roof subsidence during the application period is reduced by 68% compared with the conventional bolt-mesh shotcrete support. , the displacement of the two groups is reduced by 52%, which meets the stability requirements of roadway support. The shed-anchor-grouting synergistic support technology has a significant effect on the deformation control of the deep broken surrounding rock roadway, especially in the control of the surrounding rock during the impact period of the excavation.

In order to test the bearing capacity of the modular dome sliding mode rigid platform in the pouring of large-diameter silo roof structure, a 36 m span modular dome sliding mode rigid platform was taken out for static load test and theoretical analysis. In this paper, according to the constraints of the actual test object, the effective finite element calculation model parameters are established, and the finite element calculation analysis and test results of a single space pipe truss are compared and analyzed. The test results show that a single space pipe truss has good bearing capacity, and the correctness of the finite element calculation model is verified, which provides a reference for establishing the finite element calculation model of modular dome sliding mode rigid platform.

Aiming at the problems of strong mine pressure behavior and frequent occurrence of strong dynamic load in fully mechanized caving face of shallow buried thick hard roof and extra thick coal seam in caojiatan coal mine of Yushen mining area, the law of strong mine pressure behavior in working face is studied and summarized at first.The results show that:the average step distance of periodic pressure on the working face is 18.4m, the average continuous distance of pressure is 11.5m, and the average dynamic load coefficient is 1.45,the pressure mainly affects 35#~125# support. The periodic weighting of working face has the characteristics of strong dynamic load, long duration, obvious regionality and periodic strong mine pressure. The working face has a large period weighting at an average interval of 135m. In case of large-scale periodic weighting on the working face, there is generally strong continuous pressure, accompanied by large-scale and long-term opening of the support safety valve(the opening ratio of safety valve is more than 50%) and continuous and rapid downward decline of the support movable column(the maximum reduction of the support exceeds 2.0m). In order to reduce the threat of strong mine pressure caused by the hard roof, the underground directional horizontal long borehole regional fracturing technology is used to pre crack the hard roof of the working face. After the implementation of regional fracturing, the intensity of mine pressure in the working face has been significantly weakened, and the phenomenon of strong mine pressure behavior with rapid roof subsidence has not occurred again. The regional fracturing has achieved good application results, which can be used as a reference for the treatment of strong mine pressure in shallow buried thick hard roof face in Yushen mining area.

Aiming at the problems of large overhanging roof area and serious air leakage in the goaf caused by the difficulty of the roof to collapse on its own in the initial mining stage of the working face under the hard roof, and the impact force caused by the sudden large-area collapse of the overhanging roof causes harm to equipment and personnel, etc, put forward a technical scheme of coupling three-dimensional directional hydraulic fracturing to weaken the roof at the initial mining depth and shallow hole. Through theoretical analysis, numerical calculation and field observation, etc., the first pressure data of the working face without hydraulic fracturing and the hydraulic fracturing of the new process were compared, the study revealed the control mechanism of the initial mining depth and shallow hole coupling 3D directional hydraulic fracturing technology on the hard roof structure of the fully mechanized caving face of the thick coal seam. The results show that the coupling of deep and shallow holes with three-dimensional directional hydraulic fracturing shortens the first pressure step of the basic roof of the 1012 working face from 58m to 16.3m, which greatly improves the safe production conditions during the initial mining of the hard roof.

Taking the no.117 fully mechanized top coal caving stope in Jinjitan coal mine as the research object, the paper studies the development regularity characteristics of roof overburden water conducting fractured zone, and constructs the predictive model for the maximum height of water conducting fractured zone induced by the fully-mechanized caving mining of Jurassic extra thick coal seam in Northern Shaanxi with the methods of optical fiber monitoring, post mining borehole flushing fluid leakage observation and fitting calculation. The field monitoring results show that the maximum height of the water conducting fractured zone ranges from 220.82m to 223.75m, the average ratio of the water conducting fractured zone height to the mining height is 20.21, and the calculation result of the predictive model has an average relative error of 2.96% to the measured results. The research result shows that with the advance of the no.117 stope mining, coal seam roof water conducting fractured zone develops rapidly upward; When the top boundary of the water conducting fractured zone develops to soil rock interface, the upward growth rate of water conducting fractured zone decreases rapidly, the key impermeable soil layer has a significant inhibitory effect on the development of water conducting fractured zone; When mining over about 100m, water conducting fractured zone develops to the maximum height; Due to the self-repair characteristic of Lishi loess(Q2l) after being damaged by mining, the maximum height of water conducting fractured zone decreases slightly with the continuous mining, and the development of water conducting fractured zone does not penetrate the key impermeable soil layer. The research conclusion can further provide a scientific reference for safe production and coal seam roof water rush prevention in the coal mine with extra thick coal seam mining in Northern Shaanxi.

Grouting modification and reinforcement technology is an effective way to control the stability of fractured coal surrounding rock. Accurate prediction of infiltration and diffusion law of grouting slurry in fractured coal is of great significance for scientific evaluation of grouting effect. The influence of heterogeneous distribution of fractures in coal is not taken into account in the traditional grouting seepage diffusion model, which results in a large error between the prediction results and the monitoring data. In this paper, based on the coal mining and excavation project of No.3-Biangle 091 tunnel in Jingfang Coal Industry of Shanxie, the identification method of coal seam rate based on digital photography and digital image processing technology is proposed, and the heterogeneity characterization model of coal seam based on Weibull distribution is established. A numerical calculation model of grouting grout permeability and diffusion was established by using multi-physical field coupling software COMSOL, which considered the heterogeneity distribution of coal fissures. The influence of coal average fracture rate, fracture distribution homogeneity index and other parameters on grout diffusion distance and grouting pressure distribution in coal was studied. The results show that: When the average fracture rate is higher and the fracture distribution homogeneity index is higher, the grout pressure is higher and the permeability and diffusion rate of grout is faster. However, when the fracture distribution homogeneity index reaches a certain degree, the fracture rate distribution in the model tends to be uniform and has little influence on the permeability and diffusion results of grout. Compared with the traditional model (homogeneous model), the permeability and diffusion distance predicted by the model (heterogeneous model) in this paper is reduced by 16.9%, which is consistent with the law of uneven permeability and diffusion of grout in practical engineering, and has a certain theoretical significance for guiding the grouting design of fractured coal.

In order to systematically summarize the research results of centralized liquid supply technology in coal mining and promote the intelligent, efficient and green development of fully mechanized mining liquid supply technology, the development status of centralized liquid supply technology in coal mining at home and abroad was comprehensively summarized by using comprehensive analysis method. The shortcomings of the traditional way of liquid supply in working face are analyzed, the main problems that can be solved by centralized emulsion supply in coal mining and its advantages are disguessed. Research and application of the key technologies such as super large-flow emulsion supply technology, pressure control technology based on parallel multistage unloading for multi pumping stations, technology of long distance liquid return relay of emulsion and technology of automatic protection for pressure loss of hydraulic system are introduced. The large flow emulsion pump station with 1250 L/min and 40 MPa can alleviate the pressure loss and flow loss caused by long distance transportation of emulsion. The parallel multi-stage unloading device of multi pumping station can realize pressurization or unloading by controlling the unloading components of different stages, which can reduce the amplitude and frequency of pressure fluctuation of pumping station and solve the problem of insufficient frequency conversion response. The emulsion liquid return relay technology solves the problem of difficult column falling caused by excessive resistance of liquid return in working face when the liquid is supplied downward. The automatic protection technology of working face pressure loss can provide a favorable guarantee for the safety of equipment and workers in the process of emulsion long-distance transportation. In the aspects of power system, pipeline system and system layout, the development direction of centralized liquid supply in mining area is prospected and suggested. With the development of effective control technology of high frequency pulsation in liquid supply system, continuous pressure control technology of multi pump station flow based on variable frequency speed regulation, and pressure loss control technology of long distance liquid supply, the possibility of the transition for the liquid supply system of working face from " One working face with one pumping station " to "centralized liquid supply of multi working face" and then to "ground pumping station" are put foeward.

The surface subsidence caused by coal mining activities has become an important factor affecting the sustainable development of mining areas. It is necessary to use appropriate monitoring methods to effectively monitor and analyze the subsidence of mining areas. Traditional Differential Interferometric Synthetic Aperture Radar (DInSAR) is limited in monitoring large gradient subsidence caused by mining. And it is difficult to monitor the edge of mining area with high precision using unmanned aerial vehicle (UAV) technology. This study proposes the integration of DInSAR and UAV, two non-equal-precision monitoring technologies, and uses the traditional ground measurement to verify them. The advantages of the three data are complementary to achieve high-precision monitoring of the mining area. The probability integral parameters of coal panel 81403 in the Yangquan coal mine are inversed using the fused data. The results show that the inversion parameter results are basically close to the measured parameter results. It has certain reference value for the prevention of mine geological disasters.

The identification of mine water inrush water source plays an important guiding role in mine water disaster prevention and emergency rescue. In order to solve the problem that the current water source identification only considers a few factors such as mine water chemical characteristics and water level observation, and lacks the support of mine water inrush mechanics. Taking the 1021 middle working face of Linxi Coal Mine as an example, a method for identifying the source of mine water influx based on the coupling of hydraulics and hydrochemistry is proposed. The method firstly solves the critical water-proof coal-rock column thickness L_v of water inrush from different water sources or channels at the water inrush point according to the mine hydraulic model of poorly sealed boreholes, faults, old gobs, floor and other mines. Secondly, the quantitative relationship between L_v and the thickness L_e of the actual water-resistant coal-rock column is compared to determine the prior probability of water inrush from different water sources. Then, with the prior probability as a link, a Bayesian discriminant analysis is used to establish a mine water inrush water source identification model based on the coupling of hydraulics and hydrochemistry. Finally, the model is used to verify and identify the water source of the water inflow point in the 1021 mining face. The research results show that because the hydrochemical characteristics of the Ⅲ aquifer and the Ⅳ aquifer are similar, the establishment of a single hydrochemical identification model will misjudge the water source of the inflow point as the water of the Ⅲ aquifer. The water source identification model based on the coupling of hydraulics and hydrochemistry established in this paper can accurately identify that the water source at the water inflow point belongs to the fourth aquifer water.

In view of the urgent need for the calibration of mine seismic sensors in China, the CS18VLF vibration system was introduced, and the calibration indexes of frequency error and amplitude error and amplitude linearity were proposed. The experimental results show that the average of maximum frequency error and maximum amplitude error of the new mine seismic sensor are 2.5% and 5.35%, respectively, the average maximum frequency error and maximum amplitude error of the mine seismic sensor after long-term underground use are 3.1%,14.3%, the average of amplitude linearity of the new mine seismic sensor are 0.991, the average of amplitude linearity of long-term underground used are 0.961,the mine seismic sensor after long-term used has the problem of increased frequency and amplitude errors and decreased amplitude linearity , which verifies the feasibility of the test method. According to the verification test results of the old and new mine seismic sensors, it is preliminarily determined that the value of the frequency error is lower than 5% and the value of the amplitude error is lower than 10% and the value of amplitude linearity in higher than 0.97 as the critical values for judging whether the mine seismic sensor is effective.

Temporary support is widely used in coal mine rapid excavation face, hydraulic synchronous system can improve the synchronization of column cylinder. Aiming at the cavitation phenomenon of synchronous valve in synchronous system of temporary support in roadway, the multiphase flow model of valve cavity was established by fluent. The influence laws of different parameters (number of valve ports, diameter of fixed throttle ports, distance between double row valve ports, number of valve ports) on the cavitation intensity and distribution in the valve chamber was studied. The optimal values of each parameter were obtained by optimization. The results show that when the synchronous valve adopts a double-row mechanism, the diameter of the fixed orifice is 6 mm, the distance of the double-row orifice is 10.5 mm, and the number of orifices is 12, the maximum volume fraction of vapor phase is reduced by 24 % compared with the initial flow field in the valve chamber, the cavitation area is reduced, and the cavitation resistance is enhanced.

The real-time state tracking and position and attitude quantitative monitoring of hydraulic support side guard is one of the key technologies to realize safe efficient and intelligent mining in underground fully mechanized mining face. Aiming at the problems of low reliability and lack of quantitative monitoring ability of the existing hydraulic support upper guard plate condition monitoring methods, a non-contact upper guard plate motion condition monitoring method based on deep neural network is proposed in this paper. This method realizes the spatial position detection of the key points of the upper guard board through the convolution and deconvolution network, and then uses the feedforward neural network to convert the spatial motion trajectory of the key points of the upper guard board into the expansion angle of the upper guard board, so as to realize the quantification of the condition monitoring of the upper guard board. The results show that the average detection error of the key point spatial position of the upper guard board is less than 2 pixels, the average quantization error of the position and attitude angle of the upper guard board is less than 3 degrees, and the processing speed of the algorithm is more than 60 frames per second, which has good monitoring performance.

In order to explore the temperature and degree of vulcanization(rubber crosslinking degree)of different areas of the conveyor belt in the vulcanization process with time,this paper obtains the values of rubber thermal conductivity and specific heat capacity at different temperatures through experiments,and writes UDF program for introduction into FLUENT.The rubber vulcanization curves at three temperatures of 145℃,150℃and 155℃ are fitted and analyzed to determine the optimal vulcanization kinetic model.Based on C language and FLUENT predefined macros,the UDF user-defined program model is compiled,and the heat transfer and vulcanization degree of the conveyor belt are coupled through the finite element analysis software FLUENT,and finally the accuracy of the simulation is verified by temperature measurement experiments.The results show that the vulcanization kinetic model,the setting of initial conditions and boundary conditions,and the coupling calculation method of vulcanization and heat transfer selected in this paper can accurately predict the vulcanization process of the conveyor belt.The heating rate of the outer and inner areas of the conveyor belt is significantly different,and the central area is the area with the slowest heating rate,the longest scorching time,and the final completion of vulcanization.According to the simulation results,the vulcanization process can be optimized for the belt vulcanization time,rubber material formulation, rubber preheating,etc.

In order to study the influence of coal thickness on acoustic emission characteristics and pre-peak damage characteristics of coal-rock combination bodies during deformation and fracture, uniaxial compression acoustic emission tests were carried out for three coal-rock combination bodies with coal thickness of 20mm, 33.33mm and 60mm respectively. The results show that with the increase of coal thickness, the uniaxial compressive strength and acoustic emission peak count of coal and rock composite decrease, and the relation between coal thickness and acoustic emission peak count satisfies exponential function. The failure duration of composite increases with the increase of coal thickness. The variation of ae cumulative count can be divided into slow growth stage, rapid growth stage and peak acoustic emission stage. In the first two stages, the growth rate of ae cumulative count is positively correlated with coal thickness, and in the last stage, it is negatively correlated. The pre-peak damage evolution of the composite body can be divided into three stages: initial damage, stable damage development and sudden and unstable damage development. The relationship between damage variable and strain satisfies power exponential function, and with the increase of coal thickness, the corresponding peak strain increases when D=1.

The main inclined shafts of some coal mines in sandstone strata of Fushuiluohe Formation are constructed by artificial freezing method, and the surrounding rock of the inclined shaft wall will undergo creep failure under long-term stress after thawing. In order to study the creep failure mechanism of rocks with different fracture dip angles after thawing, taking the sandstone of Luohe Formation in a mine as the original rock, the sandstone-like rocks with prefabricated fractures of different angles were prepared, and the mechanical properties of triaxial compression creep after thawing were studied. The experimental results show that : Among the three inclination angles of sandstone-like prefabricated, when the inclination angle is 45°, the development and expansion of internal new cracks along prefabricated cracks are greater, and the generated axial creep is larger and the change rate is faster. The second is fracture dip angle 0°, the last is fracture dip angle 75°. According to the test results, based on the Nishihara creep model, the fractured plastic body elements and the degradation evolution equation of the whole creep process are introduced to establish a nonlinear creep model considering the influence of the original joints and carry out a three-dimensional extension. The least square method is used to solve and fit, and the fitting results are basically consistent with the experimental data. The research results have certain reference value for disaster mechanism analysis and long-term safety evaluation of artificial freezing inclined shaft after thawing.

In view of the lack of research on the spatiotemporal changes of deep soil bulk density, porosity and water content, based on the measured data of coal mining subsidence area of nalinhe No. 2 mine in Yushenfu mining area, the temporal and spatial changes of soil moisture content, soil bulk density and porosity at 0-10m depth are studied. The results show that with the increase of the formation time of coal mining subsidence area, the soil bulk density gradually decreases, the porosity gradually increases, and the soil moisture content recovers. In terms of spatial distribution, the soil bulk density in the tensile area is lower than that in the basin bottom area, and the soil porosity is higher than that in the basin bottom area, indicating that the influence of coal mining subsidence on the surface structure in the tensile area is more obvious and lasting; The change of soil moisture content in the stretching area is less than that in the basin bottom area. The 0-2m soil moisture content in the depth direction is mainly affected by coal mining ground fissures, and the 6-10m soil moisture content is mainly affected by the change of groundwater. The middle is a transition zone, and the soil moisture content is relatively stable.

Aiming at the problem of large demand and high cost of traditional coal mine paste filling materials for fly ash, this paper studies the performance of paste filling materials when gangue powder replaces fly ash as auxiliary materials. Orthogonal test method and MATLAB are used to carry out linear regression prediction and 3D visualization curve model. The influence of water content and cement content on the fluidity and mechanical properties of paste filling materials is analyzed. The test results show that with the increase of cement content, the fluidity of filling slurry decreases slowly, and the compressive strength at the same age also increases slowly, and the change is obvious from 1d to 3d, and the change is small from 3d to 28d. Water content is the main factor affecting fluidity, especially the expansion degree of filling slurry. With the increase of water content, the compressive strength at the same age is significantly reduced, and the longer the age, the more obvious the result. Comprehensive analysis concluded that the optimal ratio of 15% cement content, 23% water content of filling materials, both to meet the requirements of filling strength and paste liquidity requirements.

To solve the problems that seriously corrosive anchor net supporting materials (protective steel nets) in the wet environment of Shendong Coal Group Company, the scanning electron microscope, X-ray diffraction, Fourier transform infrared instrument and electrochemical test were conducted to analyze the morphology, structure and corrosive mechanism of protective steel nets (welded protective nets of 45# steel) taken from the coal lane, respectively. Besides, the anti-corrosion effect of protective steel net covered by the epoxy zinc-poor coating, which is composed of 32% of pigment volume concentration, was studied by immersion of simulated roof water. The results depict that the rust layer on the protective steel nets consist of α-FeOOH, γ-FeOOH, Fe2O3 and Fe3O4 with loose porous structure, leading to continuous corrosion process of the metal matrix. Meanwhile, the epoxy zinc-poor coating is valid to reduce the corrosive rate of protective steel nets down to around 0.001 mm/a by shielding effect. This strategy can effectively simplify the construction process, improve the corrosion resistance and prolong their lifespan of the protective steel nets in coal lane.

In order to study the mechanical properties of shotcrete in bolt shotcrete support roadway of coal mine, the "shotcrete large plate method" was used to make concrete standard test blocks in the construction site of coal mine. Through laboratory tests, the compressive, tensile, flexural, shear series strengths, cohesion, internal friction angle and other mechanical parameters of shotcrete under different curing ages were comprehensively and simply tested. The test results show that the compressive strength and tensile strength of shotcrete increase logarithmically with time, with rapid growth in the early stage and slow growth in the late stage. The growth rate is as high as 373%~406% on the 7th day and only 9%~12% on the 28th day. The bending strength and shear strength change in a parabola with time. They have been increasing in the early stage, reaching the peak value at about 21d. The maximum bending strength and shear strength are 5.04MPa and 5.26MPa respectively, and then they show a downward trend. The bending strength and shear strength decrease at 28d are 18% and 19% respectively. The 28d benchmark tensile, flexural and shear strengths of shotcrete are 3.04MPa, 4.11MPa and 4.29MPa, respectively 7%, 9% and 10% of the compressive strength. The cohesion and internal friction angle of shotcrete are respectively about C=0.20MPa、φ=50°. The experimental results provide a basis for the evaluation of mechanical properties of shotcrete and the selection of numerical simulation parameters.

This paper analyzes the carbon emission boundary and carbon emission sources in the whole life cycle of coal mining based on the life cycle approach and underground coal mining process, constructs a carbon emission accounting model for the whole life cycle of coal mining, and finally conducts an example study with the actual production situation of coal producer M. The results show that methane escape and electricity consumption are the most important factors of greenhouse gas emissions from coal mining; the basic electricity consumption to maintain the normal operation of the mine is the largest power consumption item in the whole life cycle of coal mining, and the digging and retrieval equipment also occupy a large proportion in the electricity consumption. Finally, the low carbon development countermeasures of coal production enterprises are proposed.

In order to solve the problem of trackless transportation of personnel, materials and equipment in vertical shaft coal mines, in view of the restricted space of vertical shaft cages and the diversified transportation needs of underground, as well as the special working conditions such as poor ventilation and high slope underground, a platform-based R&D model is proposed to first develop a clean power and transmission platform based on which the development of a series of trackless rubber wheeled vehicle. The key technologies such as the overall design of the vehicle , determination of the main parameters, development of the platform, multi-mode design of the driving unit, expansion design of the work unit and cleaner emissions, safety assurance of the vehicle are described.The articulated trackless rubber wheeled vehicles for vertical shafts applying the above key technologies and design solutions have been verified in Wangcun coal mine of Jinneng Group and Shanxi Sanyuan coal industry.The test results show that: the technical performance of vehicle fully meets the needs of the production site, and the products covers the full range of functions and highly versatile. The research on the above key technology, design ideas and methods can solve the problems of the trackless vehicles enter and exit the vertical shaft cage directly, diverse transportation needs and tailpipe pollution, poor safety protection, which can accelerate the application of trackless transportation in vertical shaft coal mines.

In order to solve the problems of subjectivity and fuzziness in the evaluation of mine gas explosion emergency rescue capability in China, Firstly, a total of 29 discriminant indexes were selected from 6 aspects, including mine ventilation system management, mine gas accumulation prevention ability, emergency rescue technical support, emergency rescue organization support, emergency rescue equipment support, and mine rescue and recovery ability to construct the evaluation index system of mine gas explosion emergency rescue ability. Secondly, the introduction of the unascertained measure theory and game theory set pair theory construction of mine gas explosion emergency rescue capability level evaluation and sorting model, using the straight-line method of unascertained measure single index structure function, the technology based on game theory combination determine the index weight, according to the degree of confidence recognition criteria to determine level of evaluation and sorting; Finally, the model is applied to the comprehensive evaluation of the emergency rescue capability of a high gas coal mine. The results show that the evaluation level of the coal mine's emergency rescue capability is good, but it still needs to take further effective control measures. The model has high applicability and operability, and can objectively and accurately evaluate the comprehensive evaluation of the coal mine's emergency rescue capability of gas explosion.

By constructing a game model between owners and contractors in the bidding of construction projects in the coal industry, this paper analyzes the optimal strategy combination of both parties by using the classic copy dynamic equation of the evolutionary game, and discusses the bidding strategy of the contractor in the case of information asymmetry; Through the explicit factor of advance schedule, the contractor cost type is reflected, so that the owner can distinguish the cost type of the contractor under the condition of information asymmetry, and the incentive contract applicable to the contractor of different cost types is designed to enable the owner to achieve the purpose of preferring the contractor.By designing incentive contracts for contractors of different cost types, the owner is enabled to achieve the purpose of preferring the contractor. The research shows that the balanced strategy of both parties is a low construction cost contractor and a normal quotation. The low construction cost contractor will hide his private information for bidding; by setting a reasonable incentive contract, the contractor will indicate the type of cost and make the best effort. It can maximize the benefits of both itself and the owner at the same time.