Taking a mine shaft shield construction as the background，the ventilation volume and negative pressure change rule was studied for mine inclined shaft shield construction with long distance and gentle slope. The results indicate that air supply amount of fan is a linear monotone increasing with the length increasing of the construction，Correspondingly，the ventilation negative pressure increases by square. Research results applied in the demonstration project，which adjusts timely ventilation volume of fan to meet the requirements of inclined shaft shield construction and effectively reduce the energy consumption of the ventilator.

Aiming at the problem of reasonable narrow coal pillar size of driving roadway along goaf of 6111 deep steep fully-mechanized working face. Based on the limit equilibrium theory solved the coal pillar width and analyzed the stress distribution and deformation characteristics of the roadway surrounding rock by using numerical simulation of FLAC3D, the reasonable narrow coal pillar width was determined and successfully applied to engineering practice．Some conclusions can be drawn as follows:? With the increase of coal pillar width, side of narrow coal pillar appeared the phenomenon of stress concentration and the coal body side stress changes little, vertical and horizontal displacement of roadway changes with different growth;?The engineering practice showed that selected coal pillar in 5m width scientific and reliable which can meet the needs of engineering．

Abstract: The research in this paper was conducted aimed at realizing coal pillar layout and recovery technology in protected coal seam which is inclined sufficient and successive pressure-relief. For the present situation on gob-side entry retaining technology which mine thick seam as protective seam and pillar layout, the method adopted catastrophe theory is proposed that is served in coal pillar layout to mine protective coal seam. At first, abrupt change and instability may happen in the coal pillar when plastic zone exceed 88% of range in the internal coal pillar by theoretical analysis and computational methods of coal pillar layout size can be deduced. On this basis, recovery technology is proposed according to coal pillar steady time and pressure-relief effect is analysised. Finally, combined with the practical engineering condition, the coal pillar layout and recovery technology parameter are dealt with and inclined successive and sufficient pressure-relief in protected seam can be realized on the premise of decrease in coal pillar size.

This paper analyze and Discuss the problem of the current standard “Method for Evaluating The Washability of Coal” in practical application. By calculating and demonstration the mismatch range of different separation density corresponding, put forward a dynamic correction method of ±0.1content under different theoretical separation density, achieve a dynamic evaluation method which fit different kind of coal., and overcome the “distortion” phenomenon of the current evaluating method. Recommendations to optimize current evaluating method, meet the general applicability of washability evaluating of various coal.

Administrative and public buildings are important components of modernized mines. They are not only symbol buildings but also presenting carriers of enterprise culture. Design of administrative and public building area in Balasu Mine adopts a clear structure of “two main axis and one auxiliary axis” in planning in accordance with existing topography of elevation difference in 3.7m. By use of an integrated design method, it brings the area into a harmonious, organic, complete and unified system in overall layout, building image and scenery space.

In order to solve the problem of serious floor heave of roadway near goaf side in high swelling and soft rock,the paper measured the deformation pattern and the structure of overlying strata by cross layout and borehole imaging methods,as a basis analysised the key factors of floor heave of roadway near goaf side in high swelling and soft rock.The results showed that rock stress and coal pillar strength were the key factors;the instability activation of overburden of roadway ner goaf side was the root of serious floor heave.Accordingly the paper proposed the new technologies to control the floor heave of roadway near goaf side in high swelling and soft rock:1）lateral roof cutting to optimized surrouding rock stress;2）packing to weak the rock activation degree;3）grouting reinforcement to improve the coal pillar strength.These ways provided a reference for the satety and high efficient mining of high expansion and soft rock.

Abstract:The influence of dynamic pressure and high ground stress are bigger in hard roof and deep mines, first weighting interval is bigger and pressure is stronger of hard roof around coal face, which caused higher requirements and greater difficulty for the supporting of gateway. This paper studied collapse characteristics of hard roof and the effect of gateway for hard roof of the 5121(s)B9b working face in the XieYi mine with theoretical analysis and field measurement. With using resin lengthen anchoring strength of the bolt and anchor combined support method in roadway of working face, determining the parameters of bolt anchor support, and making a reasonable support scheme. Field test results show that combined prestressed anchor-sticks support can meet the requirements of deep and hard roof roadway support, the maximum deformation rate of gateway is controlled within 6.1%, assuring that the safety of gateway during excavation and mining

In order to study large section starting cut surrounding rock damage and control technology, the paper as the 4th coal seam of a mine in Shanxi engineering background. The use of research, numerical simulation, site construction test and measurement method of combining, research on the deformation and failure of large section starting cut, detailed analysis of the composition anchor truss active control principle, layout and advantages, final proposed composite cable truss control technology and principle, obtained detailed support plan and implement on site. Engineering practice verified the scientific and technical support guiding ideology, and in this hope that similar to other parts of the roadway mine for reference.

Zaoquan mine is a representative mine of Northwest Jurassic roof cracks water, which normal production is seriously thretened by the Zhiluo formation sandstone aquifer and burnt rock water. In order to solve the problem of long construction period and drainage period by conventional borehole, directional long borehole is used to advance dewatering the roof water before 11202 face has formed. During the practice, four directional long boreholes has drilled and total footage is 2589m with maximum drilling depth of 603m, total water flowage is 57440 m3 in three-month drainage period with the maximum instantaneous discharge water is 64.8 m3 / h, with the significant application effect, the roof flood risk has Lifted and the working surface preparation time has reduced, which has ensure the safety of tunneling and mining and can provide a reference for similar mines.

Aiming at the problem that the continuous mining of first coal layer of the Xinji second mine is in a tense situation, the limitation for continuous mining in superseding time can be settled effectively by employing the reserved narrow coal pillar and roadway excavation technology in 2101 mining zone, and at the same time realize the continuous mining of woking faces and obtain good social and economic effects.

Zhaogu No．1 Coal Mine 11171 working face is fully mechanized face with thin base rock broken roof in complicated conditions，there is a fault near the cutting hole. Knife-handle style face was designed to to reduce the impact of the fault， and docking technology was used to carry on continuous safety production and improve production efficiency when the face was without fault impact．In the process of docking face， the equipment selection of the face were determined before and after docking，reasonably determine the hydraulic supports and scraper conveyor docking technology, the smooth realization of face connection for mechanized mining face similar conditions to provide a reference value.

Based on the background of S1206 fully mechanized coal mining face in Yuwu Coal Group, in order to study the strata behaviors and the overlying strata movement law of the fully mechanized caving face in soft and thick coal seam, the field monitoring, theoretical analysis and numerical simulation were conducted. The applicability of hydraulic support were analyzed from four aspects, the setting force, the support resistance, the working resistance frequency and the structure of the support. The results shows that the stress of the front column is generally larger than that of the posterior column, and the pressure of the two ends of the working face is less than that of the middle part. The first weighting interval of main roof is 35.2m, the periodic weighting is 11.7m, the dynamic factor is 1.55 and the periodic weighting is intense. Monitoring data analysis shows that the selection of ZF10000/21/38 caving coal hydraulic support in S1206 working face is reasonable. The support has good applicability and fully meets the production need.

In order to analysis the mechanism of thick coal seam working face water rush in the Ordos Basin in North China,by taking the case of caving coal 4 water bursting in a coal mine in Huating corporation,and research on the height devolepment of water conducted zone with key strata position,this study analysises on form layers of which in this region towards the forming conditions of roof bed separation water,and by the verification of water quality testing,determines the source of working face water bursting and its formation mechanism,guides the direction of comprehensive prevention and control of water.In this study,the analysis of regional roof bed separation water provides an important reference value to the water prevention and control design and its measures developing of thick coal seam mining in Huating mining area even the Ordos Basin.

In situ stress is one of the most important parameters in underground engineering. In this paper, the basic principles, testing equipment, calculation equations and related procedures of rheological stress recovery (RSR) method are introduced in brief. Then the RSR method, as well as overcoring technique, was carried out to measure the in situ stresses at a depth of 877m in Pingdingshan No. 1 coal mines in Henan Province, China. Three principal stress magnitudes and directions were determined. The maximum and minimum principal stresses are nearly horizontal, and the middle principal stress is nearly vertical. The stress measurement results of RSR method and overcoring technique are basically in the same order, and the major principal stresses are approximately in the direction of NW-SE, which correlates well with the stress regime of Pingdingshan zone known from the tectonic movement history. The application example shows that RSR method is suitable for in situ stress measurement. Especially in complex geology conditions at great depth, conventional methods can hardly be implemented, while RSR method can measure reliable in situ stresses with good adaptability.

The fault of under-grounding power supply system often causes override-tripping. The problem has seriously affected the safety of underground production and security of mine workers. This paper proposed a kind of cascaded fiber longitudinal differential protection which is based on distributed intelligent protection principle. The action principle of the protection was stratified and dispersed which would improve the safety and reliability of underground power supply system. The practical application proves that this method can effectively prevent override tripping and reduce the occurrence of the underground blackout accidents thus ensuring ensure the safe operation of underground power supply system.

According to the "ThreeSoft" roadway under dynamic pressure of Fenghui Mining is hard to support,the reason of the emerge of advancing abutment press is studied by analysis of the movement of surrounding rock .The scope of advancing abutment press is obtained by date recorded in roadway. Analysis of influence factors of deformation of roadway show that deformation of roadway is caused by the coupling of surrounding properties and advancing abutment press.The countermeasure of supporting is that the Supporting intensity is able to control the deformation of roadway and Release the energy of deformation when it passing through high stress range. support scheme is Putting forward base on the countermeasure. Numerical simulation show that deformation of roadway can be well controlled.

Under the condition of close distance coal seam group of ascending mining, the lower coal seam outside fault recovery when starting cut upper strata damage rule has its own characteristics. Using High-precision microseismic monitoring technology and theoretical analysis method to study qiuci A6-103 working face through the upper coal seam goaf eye, the migration regularity of rock burst. Underground microseismic event waveform is divided into five species; When working face through the lower goaf, the energy of seismic events and frequency is divided into process of "normal - fast - bursts reduction". Through the analysis of the spatial microseismic events distribution ，fracture zone height is mining height 14 times

Preliminary analysis of rules and control mechanism of surrouding rock movement of backfill mining and entry retaining with super-high-water material is made combined with the actual application situation of this technology. Adopting numerical simulation to simulate the rules of surrounding rock movement of backfill mining and entry retaining for goaf filling rate of 70%, 80% and 90%, it shows the stress and deformation of surrounding rock decrease reduces with the increase of goaf filling rate.The application in experimental working face has been made that the roof and floor convergence of roadway is within 60 mm, and the deformation of roadway’s sides is within 30 mm in field measurement, the support pressure of bag filling body is less than 2.5MPa, so it can be used for a long time so as to provide technical reference for the similar situation.

In order to liberate the coal resources lying under buildings，railways and water bodies in maximize，and protect buildings more effectively，combined with the specific engineering examples，the surface subsidence law for strip mining with super high-water material had been studied deeply through FLAC3D numerical simulation and field measurement method，Analysised the surface movement regularity of different filling strip mining scheme, obtained the optimal reasonable exploitation scheme. The results showed that：the buildings were controlled inⅠgrade and the subsidence of surface with the basic roof was coordinated synchronization when using strip mining with backfilling；the simulation and the measured results were basically consistent，the surface subsidence rate reached 95% according the measured conclusion.

Water inrush reasons and mechanism of hidden karst subsidence column induced by mining coal and rock mass damage are analyzed taking the water inrush accident of 1035 working face of Taoyuan coal mine as the research object. A three-dimensional non-linear seepage coupling model of water inrush is established based on Darcy, Brinkman and Navier-Stokes equations for the geological conditions of water inrush location. The whole water inrush process of groundwater from the aquifer through the karst subsidence column into the roadway is studied by using multi-physics coupling software COMSOL Multiphysics(CM). The results showed that hidden karst subsidence column and hydraulic conductivity fracture zone is the key part of water inrush, the two conditions of water inrush are as follows: ① The aquifer and mining space is connected through the karst subsidence column or hydraulic conductivity fracture zone; ② The aquifer has adequate water supply and maintains a constant water pressure. The velocity of flow is step-increasing in the process of water inrush and the water inrush process can not be fully described by linear Darcy seepage. The process can be described better through the three-dimensional hidden karst subsidence column non-linear seepage coupling model of the paper and the analysis on mechanism of water inrush is proved.

Abstract ：Based on researches on the geological environment of the construction area, the composition and the structure of the accumulation,this paper studies the genetic mechanism of the accumulation , at the same time, according to physiognomy signs of deformation and characteristics of the different components,we have disparted the different engineering geology on the basis of in-depth analysis of the basic characteristic of accumulation, on the basis of this,we discuss the causes of the talus slope and deformation mechanism of the future, mainly focus on the trigger factors which impact on the stability of the talus slope; In order to analyz the situation of groundwater activities and the influence degree of stability,the seepage simulation mainly aims at the changes of underground water level in the storm conditions;finally we evaluate on the local stability as well as the whole accumulation (distract) by using the limit equilibrium method and finite difference method, basing on the calculated results, this paper proposes corresponding prevention and disposal measures and suggestions based on the way of damage, the scale of damage and influence of the project that may be caused.

By using FLUENT software, the numerical simulation of counter-rotating fan with external motor was performed, variation conditions of inner flow field were analyzed. Flow field of the counter-rotating fan was simulated and analyzed in different kinds of hub-tip ratio, get the influence about hub–tip ratio to the aerodynamic parameters of counter-rotating fan with external motor from detail comparisons and analyses, such as total pressure, mass-flow, efficiency. It could provide a useful reference to the optimal design of counter-rotating fan.

As the coal mine robot's explosion-proof safety level has not yet reached the level of ia Intrinsic safety, When performing environmental detection and rescue missions the Coal Mine Robot can not enter the gas dangerous area to avoid causing disasters, Therefore, the coal mine robot needs to avoid the dangerous area of gas. In this paper, the path planning method of the coal mine robot to avoid obstacles in the regional distribution of gas is proposed, which Using MAKLINK method to characterize the working environment of coal mine robot and Ant colony optimization Dijkstra algorithm is used to calculate the coal mine robot operation path, the experimental study on the path planning is carried out respectively in the two cases, which are only the regional distribution of gas and the regional distribution of the gas dangerous area and the obstacle. Experimental results show that the method proposed in this paper can achieve the optimal path planning under the condition of satisfying the safe distance and convergence speed. This method has important significance for the coal mine robot to work quickly and to improve the intelligent of the coal mine.

A novel neural network quantum genetic algorithm is proposed to solve the problem of the lower accuracy in the scraper conveyor fault diagnosis process. Based on quantum genetic theory, the neural network weights and threshold are optimized, and accelerate solve. Theory analysis and preliminary results show that the proposed quantum genetic algorithm combined with BP neural network can effectively overcome the disadvantage of the slower convergence and falling easily into local minimum in neural network, and raise the identification precision in scraper conveyor fault diagnosis.

The coal-based industries such as coal mining, coal washing, coal-fired power generation and coal chemical consume large quantity of water resource. Thus, water resource has become the bottleneck of developing these industries. The solution strategy of meeting the water resource demand of coal-based industries by utilizing mine water and urban reclaimed water is introduced and the major technology roadmap and the developing directions are analyzed. According to the practices of Shenhua Group, it has proved that it is an efficient way for the coordinated development of coal-based industries and water resource to fully utilize mine water and urban reclaimed water.

This paper mainly analyzed the reason why high ash fine coals are difficult to be floated and discussed the current separation techniques. The main conclusions are as follows: the entrainments of high ash fine slimes is the main cause for contamination of concentrates, especially the clay minerals. Furthermore, slimes coating cause a deterioration in coal floatability and making a portion of low ash coals sink into tailings which may cause a loss to the combustible recovery. Moreover, high ash fine slimes has a damaging effect on floatation process because of the increasing reagent consumption. The current separation technologies consist of rougher-cleaner system, desliming floatation, classified flotation, branch flotation, high shear conditioning and depressants etc, the desliming floatation and classified flotation has a distinct advantage. The above technologies obtained a certain effect, but a further research is needed.

According to discuss the adaptability of C100 (30 ton axle load) loaded with train loadout systems when loading coal, the discrete element method software was used to simulate the existing C80 gondola car’s loading process(25 ton axle load). The result was compared with the measurement data at industrial field weighing instrument, the relationships between the material flow of morphology and weight inside of weight bin, chute and gondola car with time was analysised. The comparison results show that the simulation results are consistent with the trend of the actual loading process, this simulation method has high simulation precision. The results of the study has laid the foundation for the research of 30 ton axle gondola car’s loading process, also provided the basis for the improvement of the loading sequence.

The cap capability of capping layer was essential for the preservation of coalbed methane reservoirs.The size of the cap capability was mainly controlled by four factors:lithology, thickness, depth and tectonic deformation of the capping layer.In this paper, silt ratio,the equivalent coefficient bed thickness, depth and structure of the curvature of capping layer were selected as the four evaluation factors.Based on AHP analytic hierarchy process,through the four evaluation factors quantify graded and given different weights,using the mathematical model of sealing capacity index ,this paper realised quantitative evaluation on the cap capability of capping layer of Gaxun exploration area in Yuqia Coalfield.

The bolt group force analysis of rectangular explosion-proof tank shows that the bolt group’s force is not uniform and the loading curve is inverted "V" shape while the layout is uniform. To improve the connection security of the bolt group of explosion-proof tank, a method for layout optimization of bolt group is proposed in the paper. Based on the principle that the bolt layout density is proportional to strain values of the joint , the force of the bolt group is simulated after analyzing the bolt spacing and the axial force. And then the bolt spacing is optimized by MATLAB optimization program, and the new bolt layout is obtained. The loading curve of the new layout bolt group is flat, The research results show that with the optimization method , the load of the bolt group is reduced and uniform, and the reliability of the bolt connection is greatly improved.

The tyre service life of chock carrier has an effect on safety traffic and maintenance economy about itself. In the word, the characteristics of the tyre abnormal shrinkage about chock carrier are discussed. Based on the vehicle reasons and external factors, the tyre shrinkage reason is analyzed in detail. From various subjective and objective sides, the measures and suggests to overcome the tyre abnormal shrinkage are proposed reasonably, and some effective methods that can increase the tyre service life of chock carrier are suggested.

To excavate enterprise experience knowledge deeply, and improve data driven conceptual design of coal mining machine.Based on the preliminary study, this paper optimized the ?-SVR reasoning model,increased design productivity, machine surface height and weight in the output parameters, reduce the error rate from 5% to 2.5%.and developed user-friendly reasoning model for shearer conceptual design by making full use of the mixed advantages of C# and MATLAB.C# runs the m-file without MATLAB environment by calling the dynamic link library using .NET interfaces. This gave full play to its data interaction advantages,improved the execution efficiency, and reduced the development difficulty with MATLAB powerful data computing capacity.The model can help designers get the technical parameters such as the cutting power by inputting mining height, cutting depth and other primitive parameters.The operation is simple and quick, and the result is accurate and reliable.

The development and application of the technology of big data has brought new opportunities to analysis and utilization of the data of fundamental construction projects which belongs to corporation. First, the support of the big data could make enterprises obtain the business information of infrastructure construction comprehensively and effectively, meanwhile, make the information research about the cost of construction and progress conveniently. Second, the development and utilization of big data in the group make the obtaining, fusion and integration management of business data reality, at the same time, make the implement of management, decision and application of project management of infrastructure construction solidly and effectively. This article mainly analyzes the application of the technology of big data in the field of infrastructure construction from the aspect of typical project data management and investment decision of infrastructure construction, then gives an application case.

Procurement is an important part which is the link to engineering and construction of EPC. Based on the characteristics of EPC procurement, the paper studies the procurement process from the perspective of the supply chain management and gives some suggestions accordingly, which can be as the reference of EPC Procurement.