Abstract: To improve the braking performance of trackless tyred vehicles in inclined lane transportation, the impact of hillside braking on braking function were analyzed based on the mechanical models of hillside braking. Taking into account the actual operating frequencies of different road conditions, including in straight, uphill and downhill, this paper proposed an optimization designing method of braking force distribution ratio to obtain a satisfactory braking distance and stability, then a simulating calculation of a trackless tyred vehicle is taken as an example. This study can be used for reference in the braking system design of trackless tyred vehicles.

Focus on the problem of pressure pendulum in the process of steering for a full hydraulic steering system of an articulated rubber-tired vehicle, an optimization design of articulated steering mechanism is carried out based on particle swarm optimization, which aim at deduce the maximum pressure of the steering cylinder as well as the max stroke difference between the left and right steering cylinders. The simulation result before and after optimization is compared with based on the mechanical-hydraulic co-simulation model of the full hydraulic steering system for the articulated rubber-tired vehicle which is establish based on AMESim and ADAMS. Simulation result shows that for the optimized steering system the maximum pressure is deduced by 18.68%, the amplitude of the vibration is deduced by 19.41%. The optimization effect is obvious, which can be used as a reference for solving the problem of pressure pendulum for a full hydraulic steering system of an articulated rubber-tired vehicle.

According to the technical characteristics of the domestic SC Series shuttle car, and at the Wang-jialing coal mine as engineering background, put forward double lane parallel operation of three kinds of shuttle car collocation process under the condition of the coal roadwaylarge of large section and long distance (300m), and analyzes the advantages and disadvantages of different schemes, put forward the footage estimate related time factor and the formula of T circulating =max (T cuting, T supportting) +T machine +T assisted according to the engineering practice and,analysing excavation process of shuttle car in running time of the actual value and analysis of the causes, introducing the revamping of roll cable device. The practice proves that the prediction formula of footage parameters are reliable, the cable guide wheel group transformation reduces the cable fault, improve the shuttle car boot time, enhance domestic shuttle car stability, thus improving the overall efficiency,practical results has important reference and guidance significance for similar mining conditions the introduction of shuttle car.

The driving stability of coal mine large-tonnage articulated-frame dump truck is reduced by heavy load, large shape, higher gravity center. In view of the above problem, The evaluation index of "stability Angle" is put forward to evaluate and optimize the stability. And Stability criteria were developed according to the operating conditions in the underground tunnel of the vehicle. The analytical formula of stable angle is derived by establishing the geometric model of vehicle horizontal and second-level instability, The stability Angle was calculated by MATLAB software，The parameters of the wheelbase, wheelbase, rolling radius and gravity center position are optimized because of the horizontal one stable angle does not satisfy the criterion. By the calculation, The lateral horizontal one stable angle of the optimized design meets the requirement of stability criterion，the rest of stable angle indicators also increased by about 10%.

The worm gear reducer in the conveying system of a mine coal vehicle has the problems of big heat, low efficiency and obvious wear and tear. Based on this, the test of the power spectrum of the conveying system, reducer parameters and characteristics of conveyor system reasonably, and design of high power density and high-speed planetary transmission, developed a highly efficient planetary reducer to replace worm reducer, after the underground test shows that can effectively meet the requirements the mine coal vehicle heavy transport conditions.

Put forward a kind of combined with the advantages of centralized and distributed battery management system, with CAN bus communication is controlled by single chip microcomputer and through the LabView communication model is set up information and display the real-time acquisition of lithium battery parameters, monitoring the lithium battery power device equilibrium, discharge and flow state, according to the motor output current, battery voltage and speed information to estimate the battery residual energy and the vehicle mileage, improve the work of the lithium battery and vehicle safety and reliability.

The analysis to vehicle controlling system of explosion-proof lithium-ions battery vehicle, introduces the vehicle controlling system, explosion-proof drive motor control system and explosion-proof lithium-ions battery management system, and the multi node control system structure was designed basing on one-master multi-slave interactive mechanism; the whole vehicle communication protocol was formulated referring to SAE J1939 communication protocol standard; the information acquisition system for the control system of the explosion-proof lithium ion battery vehicle was designed by the Graphical Panel toolbox integrated with the VehSpy3 platform of the host computer, and the vehicle control system was verified by vehicle.

Based on deposit status of coal resources and outside construction conditions of Duanzhai coalfield， this paper puts forward 3 industrial layout plans. Combined with industrial layout locations, shaft types, exploration degrees, production capacities, technical equipment levels, 3 minefield development plans are proposed. As a result of technological and financial comparison, main & auxiliary inclined shaft development plan in Xiayangjiachuan is determined finally. This paper will provide some reference significances to similar minefield design.

Working slope shearer is converted from continuous coal mining machine, equipped with continuous vehicle and centralized control room. And the unmanned operation can be realized. The slope coal resource is recycled safely, through the high degree of automation. Combined with occurrence characteristics of coal in Wu Lan mine, the width of supporting pillar is calculated theoretically, and the surrounding rock’s deformation and destruction characteristics are analyzed numerically. According to the analysis result, the working slope mining technology is practiced successfully in Wu Lan mine, providing new technology for recycling the slope coal.

Abstract: In the second phase of coal mine construction, combined with engineering practice, through the comparison of the design scheme of coal flow system, it is determined that the mixing and twisting scheme and the sagging coal bunker structure are used to ensure the lifting capacity and the coal bunker system Operation, to reduce the duration of the project and the amount of engineering. The technology has been successfully applied in the construction of Hongqinghe coal mine and other works, which can be used for reference to similar engineering practice.

Introduced are the current situations and harm of construction waste in our country, and compared are the construction waste treatment in the major developed countries. Then the dry separation technology in the coal preparation industry was introduced to the separation of construction waste, and was studied by test.The separation mechanism of construction waste on dry separation equipment was studied by small scale test, and the separation efficiency of different materials mixture was compared. It was concluded that the greater the density difference of material, the higher the separation efficiency; The feasibility of dry separation technology of construction waste was verified by industrial test, and the related technological parameters were preliminarily formulated. The next working orientation is put forward.

The design of core equipment supporting structure for coal gasification plant building has great influence on the overall structure, In order to reduce the weight of the upper structure and the cost of foundation treatment,meet the process layout of the effective space needs, With equipment industrial furnace discipline cooperation, additional support, reasonable simulation support rigidity, improved connection types of equipment and structure, adjust the overall structure, achieved satisfactory optimization results and suggestions are given.

Abstract: The section size of the cutting hole for the 8.8m mining height of 12401 working face in the Shenhua Shendong Shangwan Coal Mine is 11.4m×6.3m. According to the problem of constructing and supporting difficult for the large cross-section roadway tunneling in extremely thick coal seam，Shangwan Coal Mine completed the construction of the extremely large cross-section roadway by checking the support parameters and improving the construction technology. The success of the cutting hole tunneling created a good condition for the installing of 8.8m working face.

As an important rock-burst prevention measure, stress relief blasting has been used in mine rock-burst widely, based on the numerical simulation method, we established the calculation model of nonlinear dynamic of 5303 track trough, by using FLAC3D nonlinear dynamic module and Mohr-Coulomb elastoplastic constitutive equations, to study the stress concentration and the stress relief effect of blasting on high-stress area near coal pillar. The results show that: the closer the coal pillar boundary region, high stress concentration phenomenon is more obvious in roadway; the dynamic simulation display vertical stress peak on blasting area of model was significantly reduced, the high stress area was transferred to the deep coal; we monitor stress reduction is more than 65% by blasting in 5303 track trough field.

In view of the coal mining and roadway drivage out of balance, such outstanding problems as drivage speed is low.Based on the analysis of prestressed and the principle of composite beams supporting the basis of theoretical calculation.By FLAC3D numerical simulation and ZKXG30 mine drilling field drilling peep peep instrument, long high preload anchorage technology is put forward, and the HuLuSu coal mine 21204 face return air lane in the industrial test, has obtained the good experimental effect.Created the ShanMeng area half coal rock drivage monthly record of 840 m footage. Drivage efficiency is improved effectively and the single into levels.

For the problem about 310 rail roadway deformation in Xinzhi coal mine of Huozhou coal power group, the method of combining similar material model experiment and theoretical analysis was used to deeply study on the mechanism of weak surrounding rock roadway deformation, and weak surrounding rock roadway deformation and failure rules were revealed, then a combination supporting scheme of “anchor rod, anchor rope, metal mesh, anchor and sprayed concrete” was put forward, and which was well verified by industrial field test. The research results showed that the principal causes of whole section deformation for weak surrounding rock roadway were factors that the roadway surrounding rock lithology, mining pressure and water conditioning. At the same time, deformation of weak surrounding rock roadway under the load condition mainly was creep deformation, and self-bearing capacity of surrounding rock was greatly improved by the combined support of “anchor rod, anchor rope, metal mesh, anchor and sprayed concrete”, and the deformation of weak surrounding rock roadway was effectively controlled, which provided technical support for the mine safety and efficient production.

The Ximing coal mine 8# seam which is overlying of 49409 workface has been stoping is combustible coal seam, thus the connection of upper seam fracture with working face formed air leak that lead to spontaneous combustion and influenced the safey of workface.In order to interrupt the aisle of the poise gas to working face, we researched the pressure balance ventilation technique and applied it on 49409 working face which controlled spontaneous combustion.The way of ventilation control to stop spontaneous combustible is costless and efficient ,which is worthy of promotion.

Abstract: In order to improve the sound absorption and noise reduction performance of the axial fan muffler, a YBT-2.2 type local fan is selected as the research object, and the noise intensity and spectrum distribution law of the local fan obtained by the experiment are designed and designed. Local exhaust hood muffler, and test its muffler performance. The result shows that the muffler can reduce the noise intensity of the local fan significantly, the average noise intensity of the local noise is 14dB, the muffler noise ratio is more than 15%, the noise value is less than 85dB of the national stipulation. At the same time, Noise spectrum in the air inlet, reduce the middle and high frequency noise components in the noise spectrum of the air inlet and the middle and low frequency noise components in the noise spectrum of the air outlet, so as to maximize the noise reduction effect.

In this paper, the mining of coal mine in 8# mine in Kailuan mining area is the engineering background.The empirical formula for the failure of the bottom plate does not fully reflect the problem of the depth of the bottom plate during the mining of the island face.Mainly on the island of the face of the stress distribution of the bottom of the floor and floor damage depth of the study.The stress model of the bottom pillar in the direction of the island is established. The semi - infinite space theory is used to deduce the stress formula of the floor.Based on the results of stress theory, the maximum failure depth of a mine floor is calculated to be 14.8 m.The numerical simulation software FLAC 3D 5.0 was used to calculate the maximum failure depth of the mine floor by 15.2 m.Through the use of micro-shock technology to monitor 8 # island face, the bottom of the maximum damage depth of 15.4m, which is basically consistent.Theoretically, it is proved that the exploitation of the island face has no effect on the stability of the -480 horizontal roadway .The mechanics model and the formula derive the mine which can provide the same type of mining technology to provide guidance when calculating the depth of destruction of the floor.

For further research on filling face influence scope, we use some methods, such as theoretical analysis, physical simulation combine with field measurement, to analysis it based on the first coalface face in Xima coal mine. According to the result of theoretical analysis, we could find the scope of influence of overlying strata above the filling face get smaller. And according to the transfer rock and beam hypothesis, we could get a conclusion that the influence scope will decrease. According to the result of physical simulation combine with field measurement, it shows that the influence scope in front of the working face is 18m, the influence scope behind the working face is about 22m ~ 24m. It’s influence scope much smaller than caving mining. The conclusion of theoretical analysis is verified.

The main geological structure in the North New No.3 mine is fault.Using the fractal theory,this paper quantitatively appraised the fault complexity and analysed the distribution characteristics of fault similarity dimension(Ds),then fitted the relationship between coal seam gas content and fault similarity dimension(Ds),according to the measured data of coal seam gas content.The results of this paper can provide an important reference for mine gas prediction.

In order to evaluate the risk of water disaster from coal seam roof quantitative. 11 indexs were selected from 4 aspects of hydrogeological, sedimentary and tectonic conditions and water drainage measure. Evaluation index system of water disaster from coal seam roof and evaluation standard of risk were established. AHP method was used to determine the weight vector of each evaluation index. Take the first working face of certain coal mine in Ningdong mine area, TOPSIS method was used to analyze close degree and water disaster risk level of working face was calculated. The analysis result was consistent with the actual situation. The influence factors of water disaster from coal seam roof are considered based on evaluation index system and AHP-TOPSIS method, the limitation of single factor is avoided and the weight of index is objective. The evaluation result is scientific and can be a reference for safety evaluation befroe working face mining.

Abstract: It is affirmed that the face was below water bodies which is belong to case-II waters, and the main water sources were roof sandstone fissure water and the lower segment of the middle aquifer based on the analysis on the construction of cenozoic alluvium and it’s permeability. By applying the similar simulation method, the mining rock movement and failure rule and development characteristics of the "two zones" were researched after extending the upper limit of 1202 (1) face, and the height of the "two zones" was calculated by using the formula. The researches show that the fracture in the bedrock was dominated by the delamination fracture and breaking fracture, and its conductivity was stronger; the fracture in the loose layer was affected by the mechanical conditions of the rock strata, and its development was inhibited after extending the upper limit of 1202 (1) face. The maximum expected value of the fracture zone was 52.78m, and the minimum height of the coal-rock waterproof pillar was highly qualified for safe mining. It was safe and feasible to extend the mining upper limit to -390m level and the stagnant coal which was liberated was 35000t.

To solve the support difficult and poor roof integrity problem of a gateway in close distance shallow seams, based on the engineering background of 20314auxiliary transport roadway of Gaojialiang mining mine,firstly,according to the different distance between the seam gateway to the upper mining goaf and the seam gateway location, 20314auxiliary transport roadway can be divided into three zones, they are zone of a distance of 3.2~4m,zone of a distance of over 4m and zone that located under the pillar, the paper provided different support technology because of different zone, when the top of the roof was goaf with a distance less than 4m, anchor net belt with anchor cable was applied as the first support and the steel shed applied as the second combined support of the roof; when the top of the roof was coal pillar, two-side supporting strength need to be improved.Then, supporting effects of different support technology have been validated by FLAC3D,and field tests were carried out in 20314 auxiliary transport roadway. The results showed that the maximum subsidence of roof is 48mm,and the maximum distance between two-side is 93mm, the bolt and anchor loading was stable, no roof and side fall accident and occurred supporting results was good.

Aiming at the condition of return air lane roof convergence at 700m in MenKeqing colliery , roof failure characteristics of surrounding rock is studiedby the borehole peering and deep bp monitoring ; The influence of water on rock mechanics parameters and the unstability of the argillaceous interlayer damage to roof rock mass was made certain by the theoretical analysis, Numerical simulation software FLAC3D was used to study the rule of destruction plastic after the roadway excavated between wet and dry. Based on this Put forward that Under the condition of big buried deep under high stress the water softening of surrounding rock and roof sandwich instability is the key factor of roof convergence. Based on the above research Roadway section reinforcing supporting advice was put forward to ensure the safety of the roadway during using.

Aiming at the problem of coal roadway support with loose and caving roof in Bofang mine, it is necessary to design the roadway support with limit equilibrium realm and optimize supporting parameters with FLAC2D. By changing the bolt length, diameter and interval, the effect of support units on preventing the deformation of surrounding rock was studied from the point of deformation development, thereby determining the support scheme. The research results show that the roof caving, roof displacement and two-sided displacement of optimized support scheme are less than before. The optimization is proved to have significant effect.

In order to solve the problem of geological disasters caused by coalfield fire area and to improve the awareness of geological disasters in coalfield fire area, the causes of geological disasters caused by various stages of coalfield fire control are studied, and the risk assessment of geological disasters in coalfield fire area is put forward Mechanism, the prevention of geological disasters in coal field, and the prevention and control methods of coal mine fire control in various stages, and puts forward feasible suggestions to solve the problem of geological disasters in Xinjiang coalfield fire area.

In order to define the effect of surfactants on the desorption characteristics of coal gas, the effects of Sodium Dodecyl Benzene Sulfonate (SDBS) and Coconutt Diethanol Amide (CDEA) at different concentrations on surface tension and contact angle were measured. The desulfurization and desorption rates of coal were measured by SDBS, CDEA and the combined conditions. The results show that the total amount of gas desorption increases with the increase of desorption time and finally stabilizes, and the two meet the Langmuir relation. The desorption rate decreases with the increase of desorption time and has a Power function relation.. With the increase of surfactant concentration, surface tension, contact angle, coal gas desorption quantity and desorption rate were decreased; the contact angle, surface tension and single surfactant concentration are in line with the power function; the amount of absorption, desorption velocity and single surfactant concentration gas solution is a negative linear correlation relationship with the surface; the activity of compound agent concentration is nonlinear.

对样品煤矸石进行煅烧以激发其活性，通过热重与差热分析得出煤矸石的温度活性区域，采用复合热液蚀变的活化方法确定了制作煤矸石蚀变物料的最佳参数，并以此为基础再配以水泥熟料、矿渣、石膏等研制了符合水泥国家标准的32.5与42.5标号的似膏体充填胶凝材料。采用XRD衍射分析与SEM电镜扫描等研究手段，对其水化机理进行了分析。确定其前期强度来源于水泥熟料的水化作用，后期强度主要是因为大量碱铝基硅酸盐C-S-A-H凝胶的形成。

The insufficient ultimate bearing capacity of foundation is an important factor for slope failure. In this paper, to research the influence of foundation thickness on ultimate bearing capacity of foundation, taking an open pit iron mine as engineering background, the theoretical formula of ultimate bearing capacity of foundation on considering foundation thickness have been established and verify it correctness by FLAC3D, The results show that this waste dump foundation failure mode is “located-sliding”, the relation between ultimate bearing capacity of foundation and weak foundation thickness is negative correlation. The dropping amplitude of ultimate bearing capacity of foundation decreases gradually with foundation thickness increasing. The calculation result error of ultimate bearing capacity of foundation between FLAC3D and the theoretical formula is about 3%.The results meet engineering requirements and also prove that the theoretical formula is correct. The research results can be used to calculate ultimate bearing capacity of foundation with different thickness.

Based on gas-bearing property of No.3 coal seams of Zhaozhuang Block in southern Qinshui Basin, the geological control factors such as petrography and quality, coal rank, buried depth, geologic structures, and hydrogeological conditions, which have influence on the gas-bearing property, were discussed in paper. The results showed that the gas contents decrease gradually from northwest to southeast, the Methane concentration have a big range, with relatively low gas saturation. On macroscopic view, the distribution of methane content have significantly positive correlation with the effective thickness of strata and shale content, gas content affected by secondary structure in regional, the groundwater condition of coal-bed has a seal which is beneficial to coalbed methane preservation, Only in the local structural belt the gas content reduced by hydraulic dissipation. On microscopic view, the gas content in coal-bed is mainly involved in volatile matter, ash content, and water content. Gas content and nitrogen content has a reciprocal relationship, gas content is generally lower in the high content of heavy hydrocarbon areas.

Five boreholes were selected in the Gujiao block, Xishan, Taiyuan as calibration wells to identify the coal structure, according to the geological setting of major mineable coal seams in the block, and the coal structures of 31 boreholes were identified due to the results of integrated natural gamma, density, resistivity, and acoustic log responses. The thickness proportion of the fragmented to mylonitic coals (Ⅲ-Ⅳ coals) for each borehole were calculated, and the degree of total grey correlation for the( Ⅲ-Ⅳcoals), to which the layer distributing factors were influenced, was calculated by Matlab software. Results indicate that the layer distributing factors mainly include the thickness and the dip of coal seams, and the thickness and number of intra-seam partings. Due to the regional variation of Ⅲ-Ⅳ coals, the distribution controlling factors were further discussed, and results indicate that the Ⅲ-Ⅳ coals are significantly developed in the syncline wings that are influenced by penetrative bedding shear stress, and have a distribution controlled by the pinching-out of NE oriented normal faults. The layer distribution and regional controlling factor of coal structures are internally related rather than isolated to each other.

In order to provide feasible solutions for the resource utilization of organic industrial wastewater, the paper summarizes the research advances on slurryability of coal water slurry made from various organic industrial wastewater. The conclusion is that the technology for preparing coal water slurry from organic industrial wastewater is simple and cheap, it can also make use of some components in wastewater to promote the slurryability of coal water slurry. Therefore it is a completely feasible new approach for the utilization of wastewater. However, there are some limitations due to the complex composition of organic industrial wastewater, and it is necessary to modify the wastewater to satisfy the requirements of production in practical application.

For a more objective and reasonable evaluation of BIM-based industrial construction management process of synergy，constructing a collaborative management process framework based on BIM and setting five synergy detection points to provide support for the measurement data which would be quantitatively processed by the covariance measure based on the D-S evidence theory. Firstly, on the basis of determining the evaluation index of the inspection point, the fuzzy trigonometric function and the whitening weight function are used to deal with the gray information at the detection point. Then, the data information of the different detection points is converted into the evaluation information under the unified identification frame. Finally, according to the importance of different evaluation information, the gray information of the coordination degree detection point is merged step by step with D-S evidence synthesis rule. Examples show that, this method can not only overcome the subjectivity of traditional evaluation methods, but also can solve the D-S conflict. It can ensure the accuracy of the fusion of the results of the integrated management of the management process, and the characterization of the effect of multi-party collaborative management based on BIM's industrial construction is more intuitive.

Abstract: Coal is the first energy source in China; Coal production process may produce a large amount of gas and consume a lot of fuel and power; Coal companies have become one of the most important sources of carbon emissions. Based on the actual production of coal companies, this paper analyzes and discusses the sources of carbon emission and the emission situation in the coal production process; On the basis of a large number of investigations, we establish the measurement models and calculation methods of carbon emission from coal products; Besides, the carbon label of coal products for a certain coal company is also established through empirical analysis