In order to effectively improve the traffic capacity of the trackless rubber wheel in the gentle slope auxiliary Inclined Shaft, preventing the occurrence of transportation safety accidents and reducing the investment of engineering construction, in this paper, combined with the actual mine transportation quantity and shaft section size, choose the reasonable form of the passing chamber; And through the theoretical calculation and analysis, determine a reasonable section width, passing chamber effective length and spacing, reduce the roadway engineering quantity and construction investment, effectively play the traffic function of the passing chamber, and provide the reference and application value for the other similar conditions of the passing chamber.

In order to improve mine design efficiency and reduce the designer's drawing workload. Based on the VRMine software platform, visual studio software was used as a development tool to study the parameterized design of tunnel section. The main research contents include: the main design content of the parameterized design of the roadway section, and the code realization of the parameterized design. Based on the research, a parameterized design system for the roadway section was completed, and the system was software tested. The research results show that: based on the VRMine software, adding a parameterized design menu for the software, designing the dialog box to obtain the drawing parameters, and designing the drawing function, this method can completely realize the parametric design of the tunnel section of coal mine, and then increase the production efficiency.

The energy consumption index of the times is becoming an important driving force for the continuous development of a country and enterprise. The mine drainage equipment is also the main energy consumption factor of the coal mine, but because of the current extensive management, it is unable to meet the requirements of the sustainable development of the enterprise. In this paper, Shendong Halagou coal mine as an example, describes the process from the system construction, system design, site management, how to optimize the drainage system, implementation of lean management, energy saving and environmental protection and drainage, drainage, construction of a resource-saving and environment-friendly enterprises, has a positive significance to reduce the overall energy consumption of mine.

This paper introduces the present situation of application and popularization of the dragline stripping technology in open pit mines in China, discusses the problems existing in the application of dragline stripping technology in Heidaigou open-pit coal mine, and objectively quantified the gap between domestic and foreign countries in optimization design, production organization management, maintenance and repair, information level and other aspects. It is concluded that the main problems at present are: the design of dragline stripping technology is unreasonable, the level of equipment maintenance and management ability are backward compared with foreign countries. According to the comparative analysis of mining conditions in domestic and foreign countries, it is proposed to replace the current full-line mining plan with partition mining plan. The key research directions of dragline stripping technology should be: design of partition mining method, optimization of dragline operation method, optimization of mining procedure method, and operation and maintenance information technology of dragline.

According to the phenomenon of shaft lining water gushing in deep 266～290m summer-planting place of zhangji coal mine auxiliary shaft，the shaft lining water gushing characteristics and water gushing mechanism were analyzed. According to the situation of shaft lining water gushing、geological conditions of deep and thick overburden、on the basis of force analysis of shaft lining，the grouting scheme of in combination with grouting between borehole wall and grouting behind the wall was proposed；in order to as far as possible to reduce the disturbance to the shaft lining of grouting activities，the grouting mode of inducement grouting and Single hole small injection、group hole multi – injection was used，and the order of grouting was designed；then the grouting parameters、construction process and grouting finish standard were developed.Through engineering practice proves, the added stresses of shaft lining were released after grouting, shaft lining no seep water, the shaft lining water gushing was 0 m3/h, indicated that this grouting scheme could effectively solve the problem of the shaft lining water gushing in deep and thick overburden.

To solve the supporting technical problem of soft rock roadway under high geo-stress in deep mine, this paper selects rail cross-cut of +280m level West Wing in a Coal Mine of Jilin Province. And the surrounding rock lithology, surrounding rock strength and in-situ stress parameters are tested and analyzed, based on geological mechanics parameter test of roadway surrounding rock. In view of the test and analysis results, the control principle of deep high ground stress soft rock roadway is put forward. The reasonable supporting parameters are determined and applied to field practice. After applying in field test , the result showed that the support technology can effectively control the surrounding rock deformation of soft rock roadway under high geo-stress in deep mine.

CBM imitation tree horizontal well is a new type of horizontal wells in the ordinary naked eye multi-branch horizontal wells on the basis of innovation, through the main branch build multi-branch horizontal wells on a stable seam roof or floor, the branch sidetracking the main branch into the coal seam, and then drill a number of veins branching from the branch side. A main branch with several branches and a number of branches of each branch vein, constitute the main long-term stability and support the monitoring and maintenance of the reentrant imitation tree is a multi-branch horizontal wells. This paper describes the types of system design methods well type, as well as build a cave roof shale and communication technology, solid-wall technology, well trajectory control technology, floating point sidetracking technology, composite carrying rock technology. Imitation tree smooth implementation of horizontal wells for coalbed methane development to provide a new and efficient means.

In order to explore the effect of microwave radiation on hard rock damage and reduce the difficulty of rock breakage, the granite rock was used as the research object. Rock porosity, ultrasonic wave velocity and rock tensile strength were used as indicators of damage. Rock damage under microwave irradiation was measured by the experimental method. The results show that the granite is not affected by microwave radiation within a certain range of microwave radiation power, and when the radiation power and radiation time reach a certain value, as the radiation power increases and the radiation time increases, the rock will be significantly degraded, manifesting as increased porosity, reduced tensile strength, and decreased ultrasonic wave velocity ; in the case of equal energy consumption, compared with low radiation power, long radiation time, high radiation power, short radiation time can cause more damage of the rock; water is an important factor causing rock damage, compared with the dry rock specimen, the change of the damage index of the saturated rock after microwave irradiation is more significant; the low-power, short-time microwave radiation energy makes the rock strength increase.

The 31303 working face of cha ha shu coal mine adopts the technology of mining full height. The mining height is 6m and the pushing distance is 4500m, which is an ultra-long pushing distance. In order to meet the requirements of ventilation and auxiliary transportation, double roadway drivage is adopted, but there are some problems such as low recovery rate and difficult maintenance of secondary mining roadway. If the Gob-side entry driving technology is used, the roadway ventilation and auxiliary transportation are difficult, and in order to avoid the island working face, the working face needs to jump between the mining area or the coal seam, which cannot meet the centralized production requirements and easily cause coal pressure. In order to solve the problem of double roadway driving and the difficulties existing in the application of the technology of driving roadway along the goaf, the super-long propulsion is put forward. The technology of the distance face along the gob is applied to the 31303 super-long distance working face. The key parameters of the technology are determined by combining the theoretical analysis and the field measurement. This technology can avoid the severe influence of mining, improve the maintenance state of roadway, realize the smooth mining of roadway along the goaf, and recover most coal pillars between the two roadways, so that the recovery rate can be improved significantly.

This paper introduces the conditions of coal seam occurrence and 1206 mining face at Si Ma Coal mine, analyzes gas emission law of the mining face. Analyzes between the working face gas and air supply relations, and then adopts the combination of crossing boreholes and Fracture zone extraction, Pipes drainage for the empty area gas as the standby method. Pre-pumping test effects and finds the residual gas content extraction is 3.8128m3/t, less than the specified value of 4.5m3/t. result completely meets the standard, drawing at stope face test results and finds the upper corner gas concentration are less than 1%. The average is 0.266%, 92 percent gas concentrations are lower than 0.4%. The gas concentrations in air return are less than 0.6%, which ranges from 5.4529m3/t to 5.9705m3/t, the average concentrations is 0.35%, 90 percent gas concentrations are lower than 0.5%.

Using ZYWL-6000DS directional drilling rig in Shandong Tangkou mine construction roof high-direction long-distance drilling, the maximum hole depth reached 555 meters. According to the theory of "O-ring", the optimum height of the directional drilling is obtained by comparing and analyzing the data and effect of the high-distance drilling with different height. It is proved that the drainage efficiency of directional long distance drilling is higher and the economic benefit is better than that of drilling and drilling. With the mining face to advance, high directional long drilling to reduce the goaf and the upper corner of the gas play a role. Directional drilling technology has the value of further application in the Tangkou mining area, which can improve the efficiency of gas control and exploration and promote the safe production of coal mines.

In order to accurately investigate the effective extraction radius of this coal seam borehole, the relationship between the gas flow rate of the borehole and the time was established based on the theory of gas flow in the coal seam. the index standard of experimental investigation under different gas occurrence conditions was analyzed. the extraction standard time t was determined by using the gas content and extraction rate index method in combination with the actual situation of Fei tian coal mine in order to highlight the coal seam mining. finally, the correlation between the extraction radius r and the extraction time t was obtained as r = 0.7005 ln t - 2.0749. The investigation results show that the effective extraction radius increases with time and gradually approaches the limit effective extraction radius of 2m. When the extraction time is 37d, 89d, 168d, 318d, the corresponding effective extraction radius is 0.5m, 1m, 1.5m, 2m. The field test proves that the drilling flow method can be used to investigate the extraction radius of drilling holes in this coal seam.

Part of hoist system in coal mine adopt full digital DC motor speed control devices, which easily brings about harmonic wave and pollutes the coal mine grid. In order to solve this problem in the coal mine, the APF based on LCL-filter is developed to reduce harmonic wave in the mine grid. With a NPC three-level topology, the problem of the stability of the LCL-filter implementation is solved through the active damping method of capacitor current feedback control. Current tracking control is a key issue for APF, Considering the defects of traditional PI control, a compound control method based on repetitive theory is proposed, which is an integration of proportional control and repetitive control. The control theory is simple and easy for project implementation. Finally, the designed LCL filter and the current tracking control method are tested through simulation. And the theories are verified by experiments.

Taking Xiaozhuang Coal Mine in Shaanxi Province as the research background, Using research methods that combine numerical simulation with on-site measurement, Analyze the influence scope of deep mining of extremely thick coal seams and its impact on adjacent roadways. research shows: In the deep-buried and extremely thick coal seam, the supporting pressure in front of the working face reaches 60m, and the stress increasing zone appears at 5~17m. Support stress at the side of working face appears stress increase zone at 7~13m;After the impact of mining, the plastic zone near the roadway is asymmetrically distributed.The destruction of surrounding rock near the working face is greater than the destruction of surrounding rock on the far side. The research results can provide guidance for roadway support and coal seam mining under similar circumstances.

On the basis of summarizing development characteristics of coal bearing strata of Sijiazhuang mine in Yangquan mining area, Six layers of coal seam were selected as coalbed methane development layer to analyze composition. Based on that, logging parameters corresponding to each sampling coal seam were extracted, the linear relationship between natural gamma and ash, fixed carbon and ash, volatile matter and apparent resistivity were established. According to the volume of coal seam, it could be divided into four parts: fixed carbon, volatile matter, ash and logging fluid (pore was full of logging fluid). As a contribution to the logging response, a logging density model was established to calculate effective porosity of coal seams. The results showed that the difference between the porosity of logging calculation and the measured results were not more than 10%. The research results could be used to guide the composition analysis and physical property analysis of coal industry.

Because of strong adaptability of road condition and small turn radius, mine articulated four-wheel drive vehicle was widely used in the mine auxiliary transportation. But high malfunction rate and low reliability of its bridge structure seriously affected its performance of operation. Through the analysis of bridge structural features and experiment data acquired from vehicle bench tests, the excess temperature of bridge bearings caused by high speed rotation was proved to be the reason leading to the malfunction. The method of increasing mounting clearance and replacing with bigger clearance bearings were adopted to improve the bridge structure. The experiment result showed that the situation of bearing temperature rising was alleviated effectively after the alteration. Through the structural modification, the reliability of bridge structure was improved and service life of vehicles could be extended.

In order to ensure the underground mining operation can be carried highly,effectively, and safely, always grasp the reliability of hydraulic support, and make the reliability of hydraulic support maintained at a higher level, through the orthogonal test analysis the stress of the key components of hydraulic support under the situation that load at different positions. Research shows that: hydraulic support beams of dangerous section mainly located in the column near the box type structure on the nest, the reliability model can be derived by stress strength interference model . With the increase of load cycles, the reliable degree decreased, when the load cycles increases to a certain value, the material of the top beam to the fatigue limit and failure.

In order to determine the slope water content that cannot make slope instability, mainly considering the effect of water content on the strength parameters of slope. The slope rock mass is considered as ideal elastic plastic Drucker-Prager material, the onvergence of calculation is taken as failure criterion of slope to as the basis, the stability factor of slope by strength reduction is taken as measure to the slope stability. Stability factors of slope corresponding to different water contents were calculated using large deformation elastic-plastic finite element method. The results showed that, the plastic zone initiates from the toe of the slope, with the gravity loading, the plastic zone expand from the foot to the top of the slope with the strip shape, eventually forming sliding surface of landslide; water content increase induces the strength parameters of rock and soil slope decrease, thereby reducing the stability of the slope, stability factor of slope is significant in a certain condition of water content; ideal elastic plastic stability FEM combining strength reduction method and convergence criterion can be very good to give water content for certain slope stability factor.

49 special gas explosion accidents since 2000 were selected as samples， Based on the accident causation "2-4" model and the PDCA cycle, The 7 kinds of unsafe actions, 6 kinds of unsafe state, 3 habitual behaviors and 7 main elements of safety culture were analyzed statistically. It is found that the causes of accidents are common and can be controlled by safety training. The key is to establish safety training system to train employees. For this reason, a particularly serious gas explosion accident was taken as an example to analyze the causes of the accident, and a safety training system was constructed to find the feasibility. Finally, based on the statistical data of accident samples, a safety training system for preventing especially serious gas explosion accidents was constructed, which included unsafe behavior training, safety culture construction and Deming ring inspection.

Lignite could be used as a natural porous adsorbent treating the pollutants in wastewater. In this study, the unitary and binary adsorption behaviors of ammonia nitrogen and phenol on a lignite were tested at different temperature, contact time, initial concentration, etc. Dynamic, isothermal and thermodynamic models were introduced to analyze the reaction mechanism. The results indicated that the pseudo-second-order model and Freundlich isothermal model could well describe both adsorption behaviors of ammonia nitrogen and phenol on the lignite. Besides, both reactions were spontaneous, exothermic and entropy decreasing. Especially, the enthalpy change of the adsorption of phenol on the lignite reached -71.96 kJ/mol, indicating the existence of chemical adsorption. In binary adsorption experiments, the adsorption amount of phenol was increased through increasing the initial concentration of ammonia nitrogen, while that of ammonia nitrogen was decreased with the addition phenol without fluctuation. It could be concluded that there was no competition on adsorption site between ammonia nitrogen and phenol.

In order to provide basic data for industrial scale-up of high value fuel prepared from pyrolysis bituminous coal in fixed bed reactor, the pyrolysis characteristics and kinetic parameters of bituminous coal from Shaanxi Hong Liulin in N2, CH4, CO2, H2 and CO2+CH4 mixture were studied in a thermogravimetric analyzer (TG) and thermogravimetric mass spectrometry analyzer (TG-MS). On this basis, thermogravimetric mass spectrometry analyzer (TG-MS) were used to investigate the release of gaseous products. The experimental results showed that the pyrolysis of coal sample can be divided into three stages. The first stage is temperature range from room temperature to 388 ℃; the second stage is 388 ~605℃; the third stage is 605 ~1000℃. The maximum release intensity in N2 and CO2+CH4 appeared at about 505℃. In carrier gas of H2, CH4 and CO2, the maximum release peak of CH4 passes to the high temperature, and the maximum release temperature of CH4 increases most in CO2. The reaction between coal sample and CO2 during gasification is more involved. Therefore, the pyrolysis process of coal can be described better by second-order reaction (n=2) and three-order reaction (n=3) in the second and third stages of pyrolysis reaction.

The traditional way of monitoring structural deformation is mounting deformation monitoring device in some of the characteristics of structural parts, in order to achieve the purpose of deformation detection, but the way to a certain extent, can’t fully reflect the deformation of structure. Due to the shortage of traditional methods can’t effectively monitor the initial shape, structure deformation, maximum deformation, accurate scanning full range of structure complete modular in trestle bridge by different levels of loads using Trimble TX8 3D scanner Tianbao, quickly and efficiently obtain the point cloud data with high precision, high density, through the integration of the point cloud data processing and analysis can get timely comprehensive information of trestle bridge structure deformation, provides sufficient data for deformation analysis of mechanical properties of structure.

Abstract：Based on the position control system of electro-hydraulic proportional valve control cylinder, the mathematic model of electro-hydraulic proportional valve control system is established. Using single neuron and PID control method, a single neuron-controlled hydraulic proportional valve control cylinder position Control System Adaptive PID controller is designed in Simulink. The simulation is carried out under the load disturbance, and the step response is compared with the conventional PID control and the single neuron PID control for abrupt load disturbance. The simulation results show that the single neuron adaptive PID controller has stronger robustness and adaptability than the conventional PID control system, and can achieve adaptive control for the proportional control of the electro-hydraulic ratio of coal mining.

Analysis on the causes of frequent damage of large arms at the Joint between the large arm and the middle arm oil cylinder about a certain type of roadway repair machine .By analyzing the design method, processing process and working load.It is clear that the damage of the large arm is due to the calculation error of the working load during the design process,it causes lack of strength in large arms.By calculation,the pull of the middle arm cylinder to the large arm is 240kN when the bucket rod oil cylinder is used to collect the material,the pull of the middle arm cylinder to the large arm is 480kN when the bucket oil cylinder is used to collect the material,it is greater than the oil cylinder can withstand maximum tension when 196kN when the balancing valve is forced to open.Finally, the improvement measures of the large arm are put forward.

In this paper, for the analysis is the current situation of the air leakage which is in the scraper through the windshield, a kind of automatic windshield device designed for the air leakage situation. It can reduce the air quantity of blower which is using the pneumatic driving system and MCU controlling system. It has described in two aspects in detail-the mechanical mechanism and the electrical system. At the same time, the working status is analyzed. The system is reliable which can match the requirements of mine ventilation system and production safety requirements.

A hydraulic synchronous distributor with double driving is designed in the paper. It utilized synchronous control method of double hydraulic cylinders, by which realized the functions of continuous feed, big flow transmission, high intension, compact construction and adjustable feed proportion. The problem of off-tracking and clamping stagnation during working process which is controlled by single cylinder is solved, and the system pressure can be retained for a long time.

?Abstract: Conflicts of interest in mineral resources development are frequent, and the unbalanced distribution of interests is an important cause of conflict. Under the premise of friendly cooperative development, it is an effective way to solve the conflicts of interest by establishing rational profit distribution strategy based on the rational quantification of allocation model and distribution coefficient. This paper comprehensive consideration in the process of the mineral resources development of the contribution of each related parties, risk sharing, the investment proportion, the innovation ability, the factors influencing degree of task execution five aspects, aims to quantify the government, the mining companies, mining the mineral resources development between and among residents benefit allocation strategy, based on the shapley value of cooperative game theory method, using the entropy weight method and ideal point principle, sums up the mineral resources development risk factors, mineral resources development innovation ability index system is established and the fixed profit distribution model of shapley value, in combination with the practical case of mineral resources development, effectively optimize the interest allocation policy. This strategy helps to promote positive cooperation among core stakeholders, solve conflicts of interests in mineral resources development, and promote harmony and stability in mining areas.