According to shallow buried depth, thin bedrock and small yl-load ratio features of coal seam in DanTangou coal mine, the Roadway Driving Along Goaf mechanical model was establishmented, through the 4101 goaf basic roof breaking distance from the mined-out area and its breaking distance calculation, the basic roof rock solid coal upper beam stabilization time and a reasonable narrow coal pillar width was analysis. Based on the best timing and gob narrow coal pillar width, roadway comparative analysis of different control schemes have been reasonable technical and economic parameters of bolting, research results achieved initial success.

In the period of the mine infrastructure，when the gas is exposed in wellbore, especially having a higher risk of high gas outburst, must take scientific gas prevention and control measures to ensure that the construction of coal mine production safety. Wellbore exposing coal due to venue restrictions, more particularity risk is very demanding work in a technical, management, construction, supervision, it is a complex system engineering. Zijin Coal Industry is the High Gas Mine and the raw coal gas pressure for the wellbore smooth exposing the coal to bring greater difficulty, combined with the actual mine, take scientific and effective gas prevention and control measures to ensure safety to expose the coal seams.

Uniaxial compression test and triaxial compression test in different confining pressures were carried out by rock mechanics testing system RMT-150B for rock samples from hard rock roadway in Wolonghu mine. The tests showed that rock specimens presented a tensile failure in uniaxial compression test and a compression-shear failure in triaxial compression test. And in triaxial compression test, both compressive strength of rock specimens and elastic modulus increased with confining pressure increasing, there was also an approximate linear relation between compressive strength and confining pressure. Full section blasting technique of double order cut and medium-length hole in different depths was adopted to conducted parameter design for drifting blasting of roadway, and blasting parameters was further optimized by field test. And reasonable hole depth of tested roadway was obtained, about 2.0~2.4 m. Field test and application indicated that the utilization rate of hole was over 90%, the average single footage increased by 29%, the rock fragments were more concentrated, and roadway formed in a better shape. This achieved a good blasting effect and a significant economic benefits.

In order to make the shaft go safely and smoothly through the gushing water and large cross section with water-containing fracture zone, the field construction adopted the face pre-grouting method、mechanized shaft sinking equipments and some key technologies, which solved the technical problems such as fault with water-containing zone、water intrusion of epipedon and roof fall of surrounding rock in the construction of shaft sinking in the bedrock section of inclined shaft of E mining in Xinjiang province. Meanwhile, the method adopted above avoided the hidden danger from the construction of the tunneling、drainage and support effect in the complex geological and hydrological condition. It also saved a lot of labor、reduced labor intensity、promoted the tunneling speed and support effect and realized safety production. What’s more, it provided scientific and technical guidance and experiences to the future schemes set, site construction and safety management of the fault with water-containing zone through the bedrock section in the inclined shaft in Xinjiang district.

Along goaf as a pillar to protect road technology is an effective way of rational development of existing coal resources, increase coal resource recovery rate. Along goaf technology can greatly reduce the amount of mine tunnel excavation to ease the excavation succeed tension, time-to-Face Moving prevent angry and extend the mine service life.It has significant technical and economic benefits.It is a major reform of coal mining and seam with technology.Therefore, whether now or in the future, the technology of coal resources exploitation technology development direction.

CBM parameters wells logging is an important means for reservoir evaluation, dynamic monitoring of production and evaluation completion efficiency. And reservoir parameters are used for reservoir evaluation, stress is the most important factor that affect the coal and gas outburst. In this artical, hydraulic fracturing is used in CBM parameters wells Pingdingshan Mine No.13, to measure the wells in-situ stress and analysis the stress distribution under mining influence. The results show that ground stress presents a linear increasing trend with increasing distance to the mining face.The results of Well SS-003 are more reliable, more agreement to the ground stress of east of Pingdingshan mine area, this parameter can be used to guide field work underground.

The safety of the mineral well is directly influenced by the design level of the Hoist. With the development of CAD and the CAE software technology , the design theory and method of the mineral machine is on its way to intelligentization and high efficient. Use SolidWorks to model and do the finite element analysis for the key part principal axis，and modifying the structure.The method in this article can guide the design and development of products.

During adjusting of HHPEP(High Hydraulic Powered Experimental Platform), in many case, operation must be done manually, because of the shortage of displacement sensors and automatic approach devices. Based on the video for hand operation, a video identification technology has been developed. The technology can cut the cost of test-control system. When it's used with displacement sensors, can enhance the stability of system.

Based on remodeling of raw coal main transport system, the colliery constructs a semi-continuous waste rock discharging system. Waste rock will be transferred to temporary storage roadway through the belt conveyor and scraper conveyor, and will be discharged using this system while coal is not in use. The application of this system will significantly improve the waste rock discharging transport capacity of this colliery, greatly reduced potential risk, as well as saving the coal mine production and operating cost.

Abstract:Shen Jiazhuang coal preparation plant wash raw coal from coal mine’s own,belong to rich coal and which is the rare kinds of coal in domestic. According to the national energy policy,the coal was required to wash into the whole class,in order to improve the washing efficiency and Implementation of maximizing recycling. Three products pressure heavy medium cyclone was used to separating 50-0.3mm raw coal,and -0.3mm coal was separated by slime flotation process,so that, the process system has the features such as simple、high stability、low production and operation cost and strong adaptability to changes of coal. However,coarse slime have the minimum separation efficiency because of being the junction of effective particle size range between gravity separation and flotation separation. Therefore,coarse slime separation scheme with Teetered Bed Separator（TBS） was used，which maked the raw coal desliming screen undersize directly into TBS with classification and separation. So that,heavy medium coal preparation system under limit of separation was improved,with the result of improving the separating efficiency,reducing heavy medium consumption, and reducing the load of flotation machine and pressure filter.

This paper rely on the vice collar house of Shanxi Lu'an Chang Xing Coal Mine Group. From the design, calculation models to determine, and then on the underground structure model and solution method sele1ction and the construction of Notes for a preliminary study. The results show that: the collar house is shallow underground structure, integrated its engineering geological conditions, characteristics and use of force required to determine the arch wall structure optimal for the project, the most reasonable structure, and will be identified as the quadratic parabola parabolic equation.

With the application of IOT and information technology, the integration level of informatization and industrialization in coal enterprises has been promoted. It is of certain guiding significance in the follow-up information construction to evaluate the informatization performance systematically and scientifically. Taking BSC and AHP as the theoretical basis, the evaluation index system and its weights are made from the dimension of finance, customer, internal business process, learning and development with the characteristics of coal informatization considered.

To study mechanized caving face in the case of different mining high water-rich overburden rock failure characteristics, to 401101 face as engineering background, using physical modeling experiment of the first mining methods Hujiahe Mine, by three different mining height (10m,8m,6m) experiment, the overburden destruction of position to compete in different mining face advancing to 180m water flowing fractured zone height can reach the aquifer, based on analysis of mining rock in the cycle breakingand fracture development process, and changes in the distribution of support pressure.Conclusions can provide reliable for the first face of Hujiahe Mine mining height reference, in order to avoid the occurrence of a wide range of roof permeable disaster.

Study with numerical simulation method and field measurement of broken rock partition is done on position design and support manners of open-off cut with large section in extremely close range seam. Numerical simulation shows that, more severe stress concentration influence range extends 4 meters and 3meters down on coal pillar side of upper coal seam；range of floor failure depth is of 5.6 meters, and a more complete rock range is from 3.3 to 5.6m；thereby along the upper coal strike the open-off cut position is at least 5 meters from the edge of stope. Broken rock partition tests show that the roadway roof separation fractured, more than 1.8 meters above is a serious rupture area where is not conducive to bolt anchoring；coal rupture area inner 1.5 meters from two roadway sides is the integrity of the regional coal；in order to use the length of the bolt effectively, the top and side design anchor length is 2 meters. The face open-cut construction proved combined support of anchor fore-poling and shed in the large section is successful, the economic and social benefits are significant.

As the coal resources in the shallow is dried up gradually，exploitation coal resource and gas resource in deepen becom the inevitable trend.In order to forecast the gas content in deep coal seam. Taking the samples of 13-1 Coal Seam In Xinji No.1 Mine as research object, based on the test of equilibrium water absorption in Coal Seam 13-1,Combined with the result of coal reservoir pressure and coal gas saturation, arrive at the conclusion about the coal seam gas content in the deep, The Analysis Show That prediction result is quite in accordance with the measured data. This provides guidance for prediction about the gas content in the deep coal seam.

In order to analyze theory and method of coal level detection by intelligent camera, firstly, mathematic model of coal level detection in bunker was established by three-dimensional imaging and synthesis and decomposition of vision signal, the variation law between image signal and coal level variation in bunker were obtained by theory analysis. Secondly, the experimental system for coal level detection in variation induced by the variation of image signal was constructed, and the image signal variation law was revealed. The numerical simulation model of the coal level detection in vision display was established, the simulation show that the greater the peak and contour points of coal level are, the faster the variation of image signal is, and the greater the initial value of coal level is, the higher the image signal is, and the coal level may have lightly pit. Finally, the image reconstruction shows that the theoretical analysis, experimental research and numerical results are consistent.

According to the prediction theory of strata pressure and Fillippone formula, the relationship of phase velocity and strata pressure is analyzed statistically with empirical data, which is used to improve the Fillippone formula. Then using well logging restraint inversion to obtain the phase velocity to predict the strata pressure of the exploration area. The results show that the relationship of phase velocity and strata pressure is accorded with the index, which is above 0.8. The well logging restraint inversion method is combined well logging data with seismic data, so that the phase velocity is closer to the real geological conditions. The predicted strata pressure not only reflects close relationship with depth in general, but also reflects some changes in the local by geological factors such as tectonism. Compared to the traditional method based on the strata pressure gradient, this method has higher accuracy, which error is less than 5%.

Prediction on the mine gas emission rate is the absolutely foundation for districting extension, developing new level, as well as mining production. Setting up grey model forecast of using accumulate the original data, and Marko prediction of establishing a transfer matrix according to the measured values and grey model to predict the value of the relative change rate of divided state. Combined with field testing data, it is found after comparing the grey Markov model with the gray theory model that the maximum relative error can reduce 14.23%, and average relative error can reduce 5.78%. The empirical results show that the author puts forward the grey Markov prediction model can better predict the amount of mine gas emission.

In order to satisfy the requirement of capacitive weak signal sensing in the general micro-electro-mechanical-system(MEMS) device or gauge, a capacitive sensing circuit with ring diode demodulation is designed and experimentally verified. This circuit is mainly composed of C/V transformation, band pass filter (BPF), ring-diode demodulation, differential amplification and so on. From the Pspice simulation and experimental results, the sensitivity of this circuit can reach as high as 3.12V/pF, which corresponds to displacement measurement on the nanometer level for a general MEMS device. Due to its features such as small volume, low power consumption as well as easiness in integral, this circuit has favorable and practical value for MEMS devices such as accelerometer, gyro and pressure sensors.

Experimental study was made on the coagulation process of mine water with “PAC+PAM” as treatment agents. Under the condition of test, the coagulation result was better with “PAC+PAM” as treatment agents than with PAC only. The initial turbidity affected the result heavily, the higher initial turbidity was, the higher residual turbidity was. The best dosage of PAC and PAM was studied respectively under the condition of initial turbidity 191NTU, 592NTU and 946NTU.

Abstract： In order to solve the problem of analysis of materials' crushing energy in a jaw crusher's crushing process, Discrete Element Method (DEM) was applied . A material's discrete element model and a jaw crusher's crushing chamber's model was established by using PFC3D(Particle Flow Code in 3 Dimensions). By applying a simulated uniaxial-compression test on the material's model and adjust parameters repeatedly, so the model can meet the material's real mechanical property. The material was dropped under gravity and crushed by crushing plate, material's crushing energy's fig was obtained by recording materials' crushing energy in a crushing process. It is found that materials' crushing energy shows a steadily stair-shape increase along with crushing process by analyzing material's crushing energy fig.

This paper based on analyzes the theory and control measures of mine heat damage at home and abroad in detail, summarizes the source of heat damage and the control technology of heat damage. The basic mechanism of phase-change cooling of very fine mist is introduced. Numerical simulation of the local spray cooling equipment obtained: 30℃ hot air after cooling equipment into a 20℃~22℃ air flow,and the temperature decreased by 8℃~10℃, in line with the cooling requirements of the mine. So this kind of equipment is promoted the use of study on Green coal mining technology.

Abstract: in Laowuji Washery high ash slime flotation tests have been done, by comparison of cyclone micro bubble flotation column flotation machine sorting effect on the plant slime, flotation clean coal ash standard, solve the problem of fine coal flotation with high ash content, low yield. And from the point of view of the advantage of the electrostatic interaction of fine coal flotation flotation column. Keywords: high ash slime; flotation; cyclone micro bubble flotation column; electrostatic interaction

In order to reduce the ash of difficult floated coal slime containing sufficient amount of fine slime, this paper investigated the influence of some factors to the flotation effect, including pulp density, temperature, regime of agent, depressing flotation, flotation equipment and technology. The best conditions to reduce the ash were found, and the technique index that the flotation recovery efficiency was greater than 90.81% was achieved on the premise that cleans ash was less than 9%.

The paper introduces optimization of size composition to strengthen the dewatering of flotation coal，and study the dewatering process with self-made testing apparatus. Through analysis of the filtering process,，the velocity equation of filter process is built and the concept of specific resistance is put forward. Experiments show that the moisture of flotation coal is effectively reduced through gradation optimization technology. Besides，this process is studied combining with the specific resistance，which concludes that the comprehensive effect is good when the ratio is 0.2. At last，the ways and effects of preliminary implementation into the industry are put forward.

SO2 emissions into the atmosphere influence environmental quality seriously, sulfur dioxide emissions control can't wait task. Activated carbon dry desulfurization process has many advantages. Such as the desulphurization process water consumption is small, no secondary pollution, high temperature flue gas after desulfurization, sulfur easy recycling. At present it has been widely used. This paper studied the effect of flue gas flow, desorption temperature, moisture content of on the desulfurization function. The results show that: ①Flue gas flow small, activated carbon desulphurization performance was good, the efficiency of desulfurization increased with the flue gas flow reduced; ②Between 40℃and 120℃, the efficiency of desulfurization increased at first then decreased with the temperature increasing; ③The moisture loaded activated carbon was more, the efficiency of desulfurization was betterh

According to the coal slime pipeline blockage problem of coal gangue thermal power plant, after the analysis of the actual scene, it is sure that thick slurry pump master cylinder pressure prediction is the necessary premise of blockage prediction. The thick slurry pump master cylinder pressure prediction model is proposed, which is GSVM (support vector machine with grid method), grid search method is used to parameters optimization of SVM. The simulation results show that parameter optimization time of this GSVM forecast model is 6.55 seconds, its prediction model is stable, and the relative error is less than 3%, which can satisfy the engineering requirement .And compared with prediction model based on GA-SVM(The genetic algorithm support vector machine), The GSVM prediction model is better than GA-SVM one in the optimization time and stability, and can be used in real time pressure prediction of the coal conveying system.

Based on analyses of field geology and exploration mine data, the paper has revealed the structural characteristics and the combination pattern of them. Combined with the regional tectonic, it also analysed Wanglou minefield’s tectonic evolution after the formation of coal strata. The results show that groups of normal faults are the main structure of the minefield, and with the distribution of “the deep is more complex than shallow; and the south is more complex than the north”. Beside, it also tells out nearly NS normal faults control the tectonic framework of the minefield and folds mainly developed in the south-central, showing the distribution that NE and NWW open anticlines and tight synclines distribute regularly. Wanglou minefield experienced extrusion-stretching deformation in Indosinian、Yanshanian and Himalayan period. Tectonism of Indosinian is weak. In middle Yanshanian period, intense SE-NW extrusion stress caused lots of NE-NNE compressional thrust faults and nearly NS pressure shear faults. NE and NWW stretch stress of late Yanshanian and Himalayan period not only caused series of NW-NWW normal faults, but also transformed early structures, and the property of faults happened to change. At last formed the extensively development of normal faults pattern.

As the frequently occurring of the accidents in underground coal mine, the accurate location of mine personnel becomes very important. The accuracy of algorithms based on the improved centroid localization is not ideal. From this point of view, this paper proposes an Area-division based Centroid Localization Algorithm. The new algorithm divides the area of anchor nodes into several smaller areas to make the area of the unknown node more clearly to improve the accuracy of localization. When determining the area of the unknown node, the process of the improved weighted centroid localization algorithm will be conducted to achieve the estimated location of the unknown node. The simulation results show that the proposed algorithm can reduce the error of location and improve the accuracy of localization.

In view of present situation that main drainage system of many coal mine still run by artificial control and by relying on the experience of miners to judge the fault status，a mine main drainage system based on LabVIEW which can conduct condition monitoring and fault diagnosis was designed. This system can realize the on-line monitoring of data of the mine drainage device’s running state such as the flow of drainage pipe，the water level of the sump，the vacuum degree of the pump，the pressure at the exit of the pump，the temperature of the motor，and vibration of motor，and can realize the on-line evaluation of the running state of the mine drainage device through programming signal processing and analysis，fault diagnosis program. Trial operation shows that this system can run stably，the real-time and accurate parameters can be collected and the system condition evaluating is reliable.

Based on the next downward belt conveyor of braking characteristics and special demands, introduces the key technology of ?the working principle for self-cooled disc brake, and mainly introduces the PLC control technology in the application of disc brake. From the theoretical and engineering practice, puting forward some suggestions for improvement of disc brake,it also has important significance to ensure the safe running of belt conveyor and the promotion of PLC control technology in the application of disc brake.