Abstract: On the basis of analyzed geological conditions and the status quo of bauxite development system of the coal aluminum symbiotic mine, combined with the loess hills complex terrain conditions, the feasibility of wellhead position and jndustrial site location plan was demonstrated, then the technical and economic comparison analysis was implemented to the hoisting scheme of main shaft auxiliary shaft, arrangement scheme of the ventilating shaft and the underground development tunnels of the coal aluminum united mining. The coal aluminum symbiotic resources combined development layout was determined.

For long distance power supply pressure of fluid for the fully mechanized coal face loss and voltage drop, such as the loss to the dragon king ditch coal mine high power, heavy mechanized equipment for fluid power over a long distance, on the basis of simulation analysis of the line parameters, flow of long distance pipeline pressure loss, the influence of the fluid for intelligent integration for the liquid system is studied, and the voltage drop loss of power distribution equipment are analyzed and calculated by the influence of distance and the limit of reliable power supply, the dragon king ditch coal mine large mining height are broken distance for fluid power supply scheme optimization design of full-mechanized caving mining face. The results show that the emulsion flow velocity, the greater the feed liquid pressure loss along the line, the greater the dragon king ditch coal mine 2450 m distance for fluid pressure loss is about 3.54 MPa, using variable frequency intelligent integration system has realized face constant pressure fluid for fluid for quickly. High voltage frequency converter long-distance power supply need to adopt special frequency cable and reactor, reduce the interference of power grid, the limit of coal winning machine, crusher, reliable power supply distance is 1550m. Distance for fluid power supply technology has solved the dragon king ditch coal mine large mining height are broken fully-mechanized caving roadway pedestrians hard times, the ventilation resistance is big, the equipment train number, time labor intensity and other technical problems.

Abstract: Aiming at the problem of high deployment cost, poor maintainability and poor redundancy and fault tolerance, a wireless sensor network communication station based on ZigBee protocol is designed for the existing industrial field cable monitoring system. The communication station receives the data collected by the wireless vibration sensor. The signal transmission between the sensor and the communication station is based on the ZigBee wireless transmission protocol. This solves the problems such as high deployment cost, poor maintainability and poor redundancy and fault tolerance in the wired monitoring system. The The receiving data processing, storage and remote transmission, to achieve a unified data management and remote access users. The research results mainly include hardware design and software design. The experimental results show that the development of the communication station is feasible by testing and verifying the standard vibration signal acquisition (frequency 159.1Hz).

Due to the low efficiency of the old loading system,Big labor intensity,Does not meet the requirements of the modern loading,To enhance the quality of expansion,System reform must be carried out,Pre-installed multi-point deficit (coarse installed),After the measurement scale to reach by rail loading capacity automatic loss supplement(hardcover)the addition of automatic quantitative loading technology,Achieve rapid quantitative precision of entries coal loading.

Taking the industrial site of Yuan Datan Coal Mine as an example, considering the characteristics of drought, water shortage, rainfall concentration and difficult to store, the rainwater collection, storage and secondary utilization of coal industry site are considered from the perspective of "sponge-type city" A Design Idea and Method for Sponge Mine in Desert Area.

Regarding the poor heating of coal transporting trestle in severe cold areas, the analysis on the measured data of specific projects indicated that the envelop enclosure of a reasonable piping system design may be loose to cause cold air infiltration, and the excessive internal thermos compression difference led to thermal current dissipation. According to the numerical simulation analysis, the optimization of radiator layout plan and the increase of trestle separations can be introduced along with other measures to effectively control ventilation as well as reduce thermal loss. Furthermore, specific measures are provided to ensure the effectiveness of trestle heating.

In order to reduce the deformation of roadsides and roof of coal-rock roadway before mining and reduce maintenance engineering, the surrounding strata failure mechanism of roadway under the condition of unequal thickness compound roof and soft thick interlayer in ultra-close distance coal seam group, in Liliu mining area of Gaojiazhuang mine as the research object, using theoretical analysis, numerical simulation and field measurement. The results show that the soft thick interlayer of coal seam and the unequal thickness compound roof is the main cause of large scale destruction of surrounding strata. And the strata structure in an unbalanced state of pressure is the nature of the reasons causing widespread damage to the surrounding strata roadway. Based on the above results, the unequal thickness compound roof cable active supporting technology is proposed, part of the soft thick interlayer of coal seam supporting and reinforcing supporting parameters are optimized. The engineering application shows that the roof had been effectively controlled, and the largest deformation of the roadsides of the soft thick interlayer could also be slowed down, the roadway deformation and maintenance inputs are controlled.

Aiming at the deformation and supporting failure of 500 level roadway in Caocun coal mine, the key factors that inducing roadway damage were analyzed, the instability mechanism of roadway surrounding rock and plastic zone evolution law were studied through the comprehensive methods of theoretical analysis, numerical simulation and field measurement. The research results show that the influence of adjacent mining face plays a main role in the deformation and failure of the 500 level roadway. The plastic zone of the roadway changes from circular to oval under the influence of mining stress, and the plastic zone in two sides extends to the deep part. By the compression effect of high stress, the plastic zone in roof and floor shrinks. The scheme of "treating the bottom first rule sides" was put forward on this basis. After the implementation, rock fractured range has increased, but not beyond the anchorage range of bolt (cable) under the mining influence, the roadway surrounding rock deformation is effective controlled.

The coal pillar area is a high stress concentration area, which is easy to induce rockburst. Based on the example of 92206 working face in the Sanhejian coal mine, the stress distribution under overlying coal pillar was theoretically and numericallystudied, and the comprehensive index method was applied to analyze the regional rock burst risk, and developed the monitoring and prevention technique system of rockburst. The practice result shows that due to the coal seam face oblique affected by the coal pillar area, the rock burst risk is high, after applied the coal pressure relief and roof pre-splitting control technique, the energy releaseseismic becomes with low level and high frequent, avoided rockburst occurrence.

Aiming at the press problem of the crawler walking support under the condition of the broken roof near the fault in the short wall mining of the corner coal, take concrete engineering practice as an example, introduce the whole process of walking support detailed, in accordance with the order of “emergency-response analysis - accident handling”，and adopted effective emergency measures quickly and analyzing the direct and indirect causes , put forward the reinforcement method of roof, loose gangue grouting, analysis and calculation of the maximum traction winch, by the combined of winch and the walking support , pull the support out successfully finally. Engineering practice proves，reasonable application of grouting reinforcement and the winch is an effective method to handle the walking support press in a short time under the condition of unstable roof, Therefore, the article has important reference value for the prevention under similar conditions.

In order to improve the coal mine explosion-proof heavy-duty battery performance car series, explosion-proof low-voltage DC/AC frequency conversion technology on the controller, driving circuit and program control adopt brand new design concept. Analyzed the explosion-proof 35 tons shovel plate bracket carrier frequency converter working state of the runtime, effectively improve the function of frequency converter cooling and vehicle load capacity, "mining" traction system improves the vehicle at low speed high torque soft features, to implement the inverse proportion change of rotational speed and torque, improve vehicle traction, at the same time, the motor output current and rated current basic same, work efficiency reached 98%.

In order to solve ash fluctuations of coarse clean coal and high moisture of flotation clean coal in coal slime process, Xinzhuang Coal Preparation Plant found out the reasons for the crux of the separation process by sampling and analysis, optimized and improved the separating effects of the teetered bed and the dewatering treatment of the pressure filter, besides reduced equipments of the transportation links, this optimization can offering 2.04 million yuan more annual profits.

In view of the problem of the low degree of automation of antifreeze system in commercial coal loading system at Shigetai Coal Preparation Plant, the antifreeze spraying requirements and the working principle of various testing devices are fully studied in loading process , Antifreeze spray system automation transformation program was put forward and carried out to further improve the degree of automation of the automated loading system. Not only improved the accurate measurement of antifreeze , but also reduced the operating hours of outdoor workers and workload, while improving the working environment and reducing the labor intensity. The PLC program is used to realize the integration of the control image and the on-line display of all antifreeze system status , and the antifreeze system is refined and automatized finally.

To study in-depth on the development rule and range of broken zone of roof in stowing mining, it is analyzed by theoretical analysis and measuring on site. The quiddity and process of stratum broken in roof are analyzed by plate theory and the calculation method of height of water conducted zone of roof in stowing mining is established. Take Hongyang NO.4 Mine as research object and apply the calculation method, the calculated height of water conducted zone of 1326 working face is 8m. By measuring the broken condition of eyelet hole in stratum on site, it shows the measured height of water conducted zone is between 7.7m and 8.2m. The calculation result is proved to be reliable by measuring on site, and it can meet the accuracy demand of filed practice.

Abstract:It is especially important to analyze build-up curve of gas pressure,for getting the correct gas pressure measurement results,in the process of gas pressure determination in moisture coal-rock.By means of the analysis to theoretical formula, correcting the shortcomings of the theoretical analysis of the gas pressure recovery curve in the past. and according to the field data,it derived to know when gas gushing from piezometric tube is all mashgas,the gas pressure recovery curve is similar to parabola ,and this law has been verified in many coal mine gas pressure measuring;when the piezometric tube is full of water,the gas pressure recovery curve approximate linear;when the piezometric tube is full of mixture of water and gas,the recovery pressure is recombination between parabola linear.the conclusion can be used as optimization to previous researchers’ hyperbolic curve.

In the mining process of working face is often induced impact hazard, which is affected by the dynamic disturbance such as blasting vibration, roof caving and far-field earthquake. FLAC3D numerical simulation software is used to simulate the working surface of static 20MPa, 28MPa, 36MPa, on this basis the dynamic load of the stress wave peak is applied to 10MPa, 20 MPa 30MPa respectively, The evolution laws of vertical stress and displacement of the roof and floor under static and dynamic coupling load is analyzed. The results show that the static load is the same, with the increase of the dynamic disturbance loading, vertical stress and displacement under dynamic disturbance are more obvious, Finally the roof and floor are prone to instability; the same dynamic load disturbance, with the increase of static load, vertical roof and floor stress and displacement are also gradually increased, the greater the likelihood of a shock hazard.

In order to study the mechanical effect of the fallen rock in the goaf when the gob-side entry retaining formed by roof cutting and pressure releasing, the rule of bulking and mechanical characteristics of the fallen rock in the goaf were studied by field measurements and theoretical analysis. According to different roof conditions, 4 kinds of field measurement methods for bulk factor were summarized, which are visual hierarchy direct measurement method, whole layer delimiting limit method, indirect measurement method of hard roof and calculation method by surrounding rock deformation. The relationship between mechanical characteristics of the fallen rock and the surrounding rock movement is established, and the actual measurements indicate that the size of waste rock has a great influence on the initial bulk factor, but the residual bulk factor is basically stable at 1.26, so the composite roof has a large amount of sink after gob-side entry remaining was completed. and the stability time of fallen rock increases with the increase of the buried depth. Large fallen rock have an obvious impact on the gangue retaining, and the small fallen rock is characterized by flow deformation during compression. The force model after the stability of the fallen rock was established, and the lateral stress of the gangue to the gangue support and the supporting force of the roof were analyzed and calculated. It is proved that the law of the fallen rock has a important influence on the stability of the roof .

Pre-pumping gas drainage by crossing holes as the regional outburst prevention measures widely taken in coal mines and sealing quality is the key factor to ensure gas drainage effect. Experiment was conducted in order to investigate the different sealing technology on gas drainage effect of crossing holes. The test and application results show that the grouting sealing technology relative polyurethane sealing technology coal hole gas drainage pure volume per 100 meters increased by an average of 0.0068m3/min to 0.0423m3/min and increased 6.22 times. Extraction concentration increased by an average of 3.39% to 16.12% and increased 4.75 times. Gas drainage pure volume increased from an average of 0.0334m3/min to 0.0486m3/min and increased 1.45 times. Grouting sealing technology can be more effective in the extraction of coal seam gas drainage and shorten the time of outburst elimination and pumping standard.

Through the test of spontaneous combustion, analyzed heat intensity of coal samples at different temperatures , oxygen consumption rate and produce amount of CO2, CO, CH4, C2H4, C2H6, studied the law and characteristics of gas production in the whole oxidation stage, obtained the corresponding relationship between the oxygen consumption of coal sample and the increase of coal temperature. In the end, determined the CO as a landmark index to judge the coal spontaneous combustion , the ratio of CO / CO2 and C2H4 / C2H6 as a secondary indicator. Based on test results, determined n discrimination index value of spontaneous combustion about Pingdingshan ji group coal mining, provided a reliable basis for forecast and integrated control of Pingdingshan ji group coal mining.

For the coal mine, gas has became the most significant threat to its safe production. Although various regions has taken a series of measures to control the gas, the gas accidents still occurred sometimes. In this paper, 62711 working face of Duerping Coal in XiShan Coal Electricity Group Co., Ltd. is taken as the research object, through the field drilling drill cuttings and gas flow monitoring, analyzed the influence of ground stress on gas emission. Monitoring the work of the resistance changes of the roadway hydraulic pillars with the advance of the work surface, analyzed the change of the bearing pressure in the 62711 working face, combined with the mine site monitoring of gas emissions changes, studied the influence of advance bearing pressure on coal gas emission, which provides the guiding and theoretical basis for the gas control of coal mine.

Coal mining process is one of the main reasons for producing dust in fully mechanized coal face. In this paper, through the numerical analysis of cutting dust movement in Longdong coal mine 7141 fully mechanized face, to study the basic diffusion rule and the distribution of the cutting dust in the breathing zone (1.5m). Region within ten meters of the downwind side drum is an important spot for dust control.

For the coordination of multiple working mechanism of the mine roadway repair machine and the improvement of the work efficiency and reliability of the whole machine, the schematic diagram of LUDV hydraulic system in working mechanism for the mine roadway repair machine was designed and developed, a simplified model was established and simulated with the help of AMESim software, the LUDV hydraulic system was tested and analyzed during the test and ground tests, the results showed that when the variable displacement pump was in saturation condition, the boom cylinder and the cylinder flow were 46.5L/min and 54.7L/min, independent of each other, do not affect each other. The underground industrial test showed that the LUDV hydraulic system improves the operating performance and efficiency of the whole machine, the research results provided a theoretical basis for the optimal design of the LUDV hydraulic system of the mine roadway repair machine.

In order to find out the damage mechanism of cement slurry in the process of cementing. The invasion damage mechanism of cement slurry into the reservoir is studied by theoretical analysis and experimental test. At the same time, the research results are verified by field production. The results show that coalbed methane drilling results in different levels of coal seam collapse. The collapse radius is mainly affected by reservoir mechanical parameters and overburden pressure. The cement slurry particles are invaded the micro-fracture and pore system of the coal reservoir near wellbore region. Which decrease the reservoir permeability. The bigger distance of peak stress is, the wider range of cement slurry invades. And the lower production of the CBM well has. During cementing, the damage of cement slurry is significant. The production of CBM wells are affected greatly. The research results are significant to improve and innovate cementing technology and increase the production of CBM wells.

Hydraulic support is an indispensable equipment for fully mechanized coal face. At present, the hydraulic support is made of welded high-strength steel plate. How to determine the value of welding residual stress effectively is very important because of the residual stress after welding. In this paper, the ZF5600/16.5/26 type hydraulic support was taken as the analysis object and the key bearing structure was analyzed. Through the simulation of the convection load, the stress results after cooling were obtained.Through the simulation of the convection load, the results of cooling stress are obtained. The X ray method was used to measure the actual data of the ZF5600/16.5/26 hydraulic support and the residual stress was tested and analyzed according to the simulation model. The results showed that the simulation results were in good agreement with the experimental results and the simulation and experimental analysis of the residual stress of the key parts of the hydraulic support was feasible.

Provide the catenary curve of the scraper conveyor system, and give the typical formula for the chain length using the arc-length integral. Use the Newton-iteration method to calculation the catenary coefficient, and provide the project example, using the MATLAB software to calculate the different catenary coefficient during different luffing angle, and also calculate the different chain length. Provide the curve fitting for the variation of the chain length, and give the analysis for the curve fitting. According to the analysis result, the curve fitting and the fitting formula is correct and reasonable, has a guiding and reference value for chain precise tension control. The study is reasonable for guiding the design and improving the accuracy, also providing the theoretical reference for the research of similar reclaimer chain length variation.

Aiming at the difficulty to identify the hidden high temperature of close distance coal seam group of goaf spontaneous combustion,Using distributed optical fiber temperature detection technology to high temperature fire monitoring,Close suction tube detection technology for underground gas abnormal points monitoring,Thus comprehensive judgement high temperature areas during coal combustion.According to the close distance coal seam group mining coal distribution characteristics and law of air leakage,layout the gas station accord with the actual situation,distribution of oxygen in the mined-out area is studied through field observations,take CO concentration as a case studies distribution of dangerous gas in the mined-out area.

The flow field of none-pressure three-product dense medium cyclone is simulated by using Fluent under the fixed structure and operation condition, and that is verified. And changing the apex diameter of second-stage cyclones (41mm, 44 mm, 47 mm, 50 mm, 53 mm), draw the following conclusions：(1)That has no effects on the first-stage cyclones; (2) The air column diameter of second-stage cyclones, pressure distribution of flow field and pressure gradient is affected by it, but variation trend of pressure is similar.

In order to obtain the process parameters of the underground anthracite gasification, the underground gasification model test of Heshun anthracite was carried out. The changes of gas effective components, temperature field and roof stress field were studied. The results show that with the increase of oxygen concentration, the effective component content in the gas, the calorific value, the ratio of the gas production to the flow of gasifying agente, the efficiency of the cold gas increase， and the yield of gas decreases. When the concentration of oxygen is greater than 80%, the effective gas content is greater than 60%, the cold gas efficiency is over 65%, and the oxygen concentration of 80% is the reasonable oxygen concentration of anthracite underground gasification. The rate ratio of horizontal and vertical expansion of gasification face is (1.19～1.31): 1. The stress concentration of the roof rock in the direction of the channel increases with the gasification face, and the stress concentration factor is from 1.2 to 1.5.

Taking coal sample of BaiLu for object , the use of traditional coal water slurry preparation and mixing sludge in preparation of coal water slurry into the slurry test method respectively. Study found that, in certain amount of additives, coal water slurry using two kinds of pulping process can be obtained the concentration is greater than 58%, the viscosity is less than 1200 mPa ? s. In the same pulping conditions, blending with better stability of coal water slurry oil sludge produced, 7 days of water rate less than7%, no hard precipitate. The performance of coal water slurry mixing clay prepared good index, viscosity, concentration, particle size distribution and the pH value of all meet the requirements of the Texaco gasification process.

This paper presents a gear fault diagnosis method based on ensemble empirical mode decomposition and RBF neural network. The fault feature extraction method of ensemble empirical mode decomposition is analyzed, and the application of RBF neural network in fault diagnosis is introduced. The research experiment is carried out in the fault simulation test-bed, and the gear vibration diagnosis method based on EEMD and RBF neural network is validated by collecting the vibration signals of the gear. The experimental results show that the method is effective and has broad application prospects.

According to the shortage of compression measurement data for hydraulic support,eleven types of support compression were tested by using the vertical loading test bed,the influencing factors and variation laws of support compression were analyzed. The result shows that increasing the initial force can significantly reduce the amount of compression; with the increasing of mining height, the amount of compression increases,especially to the support type selection of the large mining height face,the relationship between the mining height and compression amount of support should be taken into consideration;the compression amount of support with single telescopic column with mechanical extension rod column is less than support with single telescopic column support and double telescopic column,after mechanical extension rod extended, the compression will no longer increase;, the compression amount of four-leg supports is less than that of two-leg support.

Vertical shaft drill is one of the key equipment in vertical shaft construction. Currently the positioning of the drill hole must be adjusted manually, which has a low degree of automation. The hydraulic system of traditional drill is improved, and closed loop control of two hydraulic cylinders is carried out by using PID control algorithm. The PID parameters are optimized by genetic algorithm, and the single arm control system is simulated with step signals. The result shows that the system is promoted in rapidity and stability. The virtual prototype model of vertical shaft drill is created in the dynamic simulation software; the changing load and the displacement of the piston rod during the process of the position varying are obtained in the drill model. Changing load is applied to the hydraulic system simulation model to obtain displacement of piston rod. Compared with the actual value, the results show that the position control system of the hydraulic cylinder keeps high accuracy under the condition of changing load.

The implementation of “One Belt, One Road” strategy provides new opportunity for China to deepen coal international cooperation , this paperanalyzes the current status of coal international coal operation, identifies key countries for cooperation, analyzes the challenges, puts forward thought, objectives and strategic arrangement, suggests measures for implementing Going Overseas strategy and pushing coordinate development between China and foreign coal industry, finally recommends 6 measures to promote coal international cooperation under “One Belt, One Road” strategy .

Large investments, complex, dynamic characteristics, the economic situation in the coal downward pressure on investment management significance significantly strengthened. The whole process of investment based on control theory, the new Mining Group decision-making stage management principles and procedures for the design phase, "before, during, after" control, the construction phase funding, procurement, accounting and other systems as well as institutional and economic responsibility audit review system, the results show these systems build a new coal mine investment management an important guarantee of success, but also has a reference to other coal companies.