According to the problem in coal mining caused environmental pollution, ecological destruction, waste of resources, high cost, charging for the “mining—backfilling—keeping” green mining technology. Analysis of gangue compression rate of different particle size distribution and stress, research the mechanism of gob-side entry retaining technology, And research the concrete filled steel tube supporting technology, the “mining—backfilling—keeping” green mining technology is feasible. Filling gangue particles with diameter less than 2.5mm in the gangue powder content accounted for 5%, particle size less than 45mm accounted for 15%, more than 45mm of waste rock accounted for 80% of the best particle size gradation. Gob-side entry retaining use anchor beam on forepoling, concrete filled steel tubular columns with gangue bags roadside support walls to maintain the stability of roadway and control deformation of the surrounding rock plays an important role. The technology has important guiding significance to green mining, has the important value of promotion and research.

China's economic development is inseparable from the support of energy. Energy resource structure being rich in coal, poor in petroleum and natural gas determines that China’s coal-based energy consumption structure will not change in quite a long period of time. Therefore, the development and utilization of clean coal is the only way for China's energy revolution. This paper analyzed the experience of coal clean development and utilization of foreign countries, and summarized China's current situation and development trend of safety and green coal mining, coal upgrading and processing, clean-burning and efficient generation, deep processing and conversion, pollution control and CO2 emission reduction. On the basis of those above, this paper put forward the following suggestions of clean coal development and utilization in China: 1)Controlling the exploitation of coal mining, and improve the scientific production capacity, 2)Improving the level of technology and equipment of coal exploitation and utilization, 3)Promoting the demonstration projects of clean coal processing and conversion, 4)Strengthening the policy support of clean coal development and utilization.

In order to explore the prospect of steep mining technology in Haerwusu Surface Mine, reasonable comparisons in both economy and technique has been performed. Besides, the social and economical meaning that steep mining technology is adopted in this mine is revealed according to the timeliness slope theory. At the same time, the exposed area and exposure time are calculated with the working parameters. With the help of limit equilibrium and finite element analysis, the stabilities of typical profiles in the southern end slope are obtained through FLAC and GEO-slope simulation. The result illustrates that, with the application of the third program, the surface mine can gain 0.89 million tons of residual coal and create the economical benefit of 204.7 million through limiting the width of bench on Level 1025m to15m.

According to the high cost of twice stripping problem of the parallel mine, it put forward side-slope and inner dump inverted triangle and side-slope horizontal ditch diagram. Aiming at the side-slope horizo4ntal ditch diagram, the cubics function about dumping ditch depth is set up by the second stripping cost reduction, capacity decreases cost recruitment and transportation cost recruitment. Through the case study, we can see that the optimal selection of reasonable depth of groove can make the economic effect of the triangle coal mining in the mining area

In order to effectively improve the efficiency of gas extraction, adaptive gas extraction pipeline valve automatic control system applied to the coal mine was designed. The degree of valve was adjusted by the adaptive adjustment algorithm, aiming at the maximization of the gas extraction concentration and extraction flow. Industrial test showed that, Concentration of the gas extraction maximum increased from 20% to 45.84% when The opening of the valve changed from 100% to 50% ;The gas pure flow extraction maximum increased from 0.328m3/min to 0.464m3/min when The opening of the valve changed from 100% to 80%. As the change of valve opening, the gas extraction concentration and extraction of pure traffic both showed a trend of increases at first then decreases.

ZhuJi west coal mine coal preparation plant products silo construction period is long，difficult，measures of the high cost, safe hidden trouble， in view of silo roof structure characteristics of the design optimization of construction scheme，Under the premise that ensure the safety of engineering construction，Reduce the construction period，reduce construction cost， accomplish a task according to schedule. This project adopts the cable stayed steel wire rope hanging synovial operating steel platform as a support warehouse top construction steel structure platform construction scheme，Solve the difficult problem，Achieve goals and objectives. Similar projects for reference.

There are three main factors to affect the cleaning result, they are rate of coal seams, lower size and separation density. firstly, the page determines the main factor by orthogonal analysis to simplify the three factors analysis into the two factors analysis. Secondly, the page simplify the complex data into intuitive graph by classification curve to determine the best separation conditions of the coal preparation plant. In the case of multi-factors, the integrated use of orthogonal analysis and classification curve is a new idea to determine the best separation conditions of coal preparation plant

It points out that the critical role of the chute in the design of preparation plant coal, the paper explains that the main factors should be paid attention to in the design of the chute, such as the arrangement, cross section, angle, sealed and cushion, noise reduction, wear resistance, Maintenance. The chute of conveyer, screen, crusher etc.is introduced. The structure of the chute should be satisfied by the demands on the property of the feeding or material-receiving equipment.The paper also enumerates three chutes which prevent lump coal crushing, The dial wheel chute of anti-broken is emphatically introduced.

The 3D modeling method has been applied in the field of field design, and its application in the coal industry is still in the exploration Thisstage. This paper takes the coal industry site design as the research object. In Throughprinciple, through the description of the application and related functional development of the GEOPAK Site ，and combined the three-dimensional site design with GEOPAK Site software applications. Then discussed the applicability and advantages of GEOPAK Site software in the coal industry；In practice, this paper takes Wang Zhuang coal mine as the research object, discussed the application of 3D modeling method in the design case of Wang Zhuang coal mine.（The Wang Zhuang coal mine as the example in this paper） and a wider range of site design work, iIn order to provide reference and help to the design of the field in the perspective of three-dimensional design. And introduce the ideas and methods of the three dimensional space design, then enrich and carry out the more widely use of this method.

Aim at the weak rock characteristics of wanbei mining area, the breakage law of different location of weak surrounding rock is analyzed, it is concluded that the effect on the working face support from strong to weak, in turn, for the immediate roof, floor and coal seam and roof; Based on analysis on stiffness coupling, strength coupling and stability coupling of the fully mechanized working face. The supporting intensity is confirmed by roof timbering and surrounding rock integrity control. The determination method of setting intensity is put forward. The design requirements of hydraulic support in weak surrounding rock are completed. Mining practice shows that reasonable hydraulic support design can meet the requirements of fully mechanized mining face in weak surrounding rock.

Based on 15101 working face retracements original channel support scheme the Ling Zhida coal mining in Shanxi province, numerical simulation was used, researching Stress deformation characteristics of roadway, According to the results of numerical simulation analysis, the row spacing between bolt and anchor cable is too small, and the roadway support strength to meet the safety retracement requirements, leading to face retracetment lag and the long cycle of retreat. To solve this problem, this paper analyzes the retracement roadway support strength characteristics, the optimization scheme is put forward, the numerical simulation method to select the optimal scheme for retracement roadway support, and field measurement. Results show that the scheme satisfies the security requirements of supporting retracement, reduces the material consumption, shortening the period of the working face retracement. For the class retreat channel support has a certain reference and guidance significance.

In order to solve the Tashan mine 8104 working face in fault gas high pumping Lane inclined section of the wear layer of roadway, in neighboring 8103 working face mining in complex structure area excavated during the difficult to maintain and serious deformation. On the basis of studying the failure mechanism of the roadway, the paper puts forward the scheme of the bolt grouting support. Through theoretical research and practical application, it is indicated that the anchoring grouting supporting scheme not only keeps the stability of the tunnel in the layer, but also obtains the remarkable safety and economic benefits.

This paper analyzed deformation characterisitics according to roadway features and indicated that low strength，high stress，initial low support strength and rigidity were main factors which result in roadway failure on the basis of geological test. The roadway control technology including prestress anchoraging，the grunting reinforcement technique was put forward. Field test showed that The max convergence between the two sidewalls was 35 mm and the max convergence between the roof and floor was 19 mm，deformation of surrounding rock has been brought under effective control，roadway maintenance was almostavoided.

For improving the accuracy and efficiency of underground traverse survey，a eccentric measuring device is mounted on the handle of total station which needn’t precise centering to measurement points. Firstly, read the plumb readings on the eccentric survey plate, followed by conventional total station traverse operation, and finally use the computer’s software programming development to correct the resulting data.This method is of high accuracy and efficiency, low cost, simple operation, high degree of automation of data processing, and the data results can be visually displayed and saved. Under the premise of ensuring the accuracy, the efficiency of underground traverse survey is improved,the process of underground traverse survey with total station is also improved. This method has gained national patent.

This paper establishes the mathematical model for the nonlinear optimization of complex mine ventilation network. The objective function is the fewest regulation facilities and the smallest air power of the main fans; the decision variables are composed of the air quantity of the cotree branches which are not the constant branch, and the resistance of the regulation branch of the maximum spanning tree. Based on the standard DE algorithm, and using the greedy searching strategy and parent individual neighborhood depth searching method, the offspring is generated by the best parent individuals, then the modified differential evolution algorithm is put forward to solve the nonlinear optimization of mine ventilation network. The practical application shows that: the modified differential evolution algorithm is feasible, and it obtains an air regulation plan which ensures mine ventilation system operating safely, economically, as well as reliably.

Along with the development of the mining technology, the content of fines coal in raw coal is becoming more and more，and the separation results of coarse slime would directly affect the quality of clean coal. To reduce the ash of coarse fines coal and improve recovery rate of clean coal, Zhangjiakou coal preparation plant used CSS separator to replace spiral separator, and made technology transformation. This paper introduces the thought and reforming scheme and concrete implement process of system transformation. By comparing the selected effect, and combining the reality of produce, this paper considers that choosing CSS separator to make technology transformation of coarse slime separation system is very successful.

A theoretical model for calculating external load of inclined shaft in the cylindrical coordinate is established. Compared with vertical shaft, inclined shaft has two basic characteristics of complex load type and non-centrosymmetric load distribution. Load of inclined shaft into three categories: radial load, circumferential load, and axial shear load. Differing from vertical shaft that radial load uniformly distributes along the circumference, the radical and axial shear load of inclined shaft are on the Y axially symmetric and the circumferential load is on the Y axially anti-symmetric. All the three types of load achieve a minimum value in the two sides of shaft, the value of shear load is 0 and which of radial load is equal to the lateral pressure of corresponding depth vertical shaft. In the circumferential direction angle 45°and 135°, all the three types of load are not equal to zero, the circumferential shear load achieve a maximum value, which are the key control points of design and calculation. Differing from vertical shaft“vertical additional stress”distribution, inclined shaft axial shear load above and below the horizontal axis plane is reverse distribution, the load direction above the horizontal axis plane is down and below the plane is up, the maximum of the load is 7 times than the “vertical additional stress”of vertical shaft. In the normal project of which inclined angle ranges from 0°to 30°，the external load increased approximately linearly with the inclined angle. The outer diameter b of inclined shaft has a similar effect on load, which can be ignored. Research results provide the basis for the analysis of inclined shaft stress distribution, design theory and calculation methods.

Through analog simulation tests, the article studies the effect of burial depth over overburden movement at the fully mechanized top coal caving face of shallow overburden and thin bedrock. According to the study, the overburden over the fully mechanized top coal caving face of shallow overburden and under thin bedrock will form into a stable structure of “Cantilever beam + articulated rock beams + arch”. When the “articulated rock beams” lose their stabilities periodically, the loose bed and earth surface will collapse after the working face as if being cut down in one whole block. Terraced sinking on the surface will penetrate through from the surface to the working face. That results in the destruction of aquifer in the overburden and surface water system, being disastrous to the ecological environment. With the increase of burial depth, the maximum sinking depth of the surface will be bigger, and the distance between the deepest sinking point and the working face will also increase.

Taking the air inlet system of mining area in a coal mine as the prototype, the simulation and experiment system of mining tunnel fire is established based on the fluid similarity theory; according to the energy conservation law, the relevant experimental work of tunnel smoke flow speed during fire period is done, which includes test, calculation and analysis. The grid division of experimental model roadway is carried on by GAMBIT software. By setting the boundary and initial conditions of smoke flow during fire period in FLUENT software, using RNG two-equation turbulence model, energy equation and SIMPLE algorithm, the steady state numerical simulation of tunnel smoke flow velocity in mine is done to obtain the change regulation of tunnel smoke flow velocity during fire period.

This paper compartmentalized tectonic evolution as the main framework, combining with the sedimentary burial history and geometry morphology of collapse column, this paper expounds the formation process of karst collapse column in Fangezhuang coal mine. The results showed that the reason of the development of sinkhole is the superposition of three periods of tectonic movement in this areas: North-east directional failure in the Late Yanshanian-Early Himalayan that leads to the development of groundwater flow zones through Kaiping coalfield, were the decisive conditions of the development of karst sinkhole; At the same time, according to the distribution of collapse column in mining area, we have studied the influence factors for specific location of collapse column, The possibilities of southeast area is high for the development of un-mining area by studying Tectonic curvature theory and ancient runoff condition. It provides a new train of thought for the prevention and prediction of karst collapse.

The transient electromagnetic response characteristics of water conductive fault, is decided by the coupling relation between its space position and the transmitting-receiving device. Based on the geo-electrical model of 3D conductive sheet, according to the theoretical analysis and the physical simulation, it was discussed how the eddy current in the sheet vary with the exciting position of the first field, and studied the apparent resistivity response of the water-conductive strike fault by the mine transient electromagnetic advance detection(MTEAD). The results show: 1) the induced eddy current is decided mainly by the number of the magnetic line, which is cut by the sheet, and it is stronger when the exciting angle is 30°～60°; 2) on the apparent resistivity contour map of MTEAD, the response of the water-conductive strike fault is one middle high resistivity abnormal area with two low resistivity abnormal areas on the left and right sides symmetrically. The result was applied to engineering, and gained good effects.

In order to analyze the surface ground movement law of mining under exposed bedrock mountain，Firstly, the software Auto CAD and Sufer was applied to establish mountainous terrain model,then the FLAC3D numerical simulation software was applied to individually establish and calculate numerical model of Mining under exposed bedrock mountain, according to the specific geological，topography and mining conditions of Shigao coal mine of Chongqing Songzao. The characteristics were obtained according to the results of simulation analysis, firstly,the values of surface subsidence and horizontal movement was strongly influenced by the surface sliding on the edge of the gob area and surface subsidence was smooth at the top of the mountain and valley area. Secondly,the horizontal movement of mining surface was larger than that of the plains under concave mountainous topography and the horizontal movement of mining surface was smaller than that of the plains under convex mountainous topography.Finally,in the valley area, the mining surface is strongly influenced by compression, and the compression value of horizontal deformation is larger than that of under plain mining.At the top of the mountain area, the mining surface is strongly influenced by stretch,and the stretch value of horizontal deformation is larger than that of under plain mining.

Under the background of geological survey in key area of Tianjun county, Qinghai Province, this paper studies the technical methods and operation procedures of geological information extraction and mapping based on remote sensing image data of IRS-P6 and ETM, and other data, such as geological map, topographic map in research area. The information interpretation and extraction and mapping of hydrogeology, environmental geology, basic geology of the research area are completed by using the methods and operation procedures introduced in this paper. It shows that the method can not only help to make full use of multi-source data, improve the efficiency of geological information extraction and precision of interpretation of remote sensing information, but help save the cost, shortens working period. And it provides technology reference for the areas with inconvenient condition and traffic to carried out geological surveys and make large-scale geological maps。

The article takes advantage of the independent researched and developed intrinsically safe vibration data recorder as vibration measuring device, Based on the actual vibration under different cutting conditions of shearer information collection and analysis formed an information database that contained vibration signals under a variety of cutting states. Meanwhile, the article has summarized coal shearer’s vibration characteristics respectively in coal cutting and rock cutting conditions through analyzing the vibration data in time domain. On the basis of the analysis consequence, an effective coal-rock interface recognition method has been put forward.

The fifth harmonic phase of fault line and health lines is approximately opposite， when coal mine Electric Network occurs Single-phase-to-ground Fault。 But the amplitude of fifth harmonic is too small to select directly the fault line。 Duffing chaotic system is Sensitive to the specific small signal and has the immunity of noise。Based on the characteristics ，a approach of detecting faulty line of compensated Electric Network is proposed。The approach is named Duffing dichotomy 。Duffing system obtain the input signal by the EMD method. Finally，The principle to select is simulated with Matlab/Simulink and the simulation results are analyzed，which show the approach is effective。

To solve the basic particle filter in the unknown space localization method of particle degradation problems, an improved particle filter algorithm based on MCMC was proposed. This particle filter robustness was enhanced. The localization simulation test using improved particle filter was developed which was applied in coal mining robot in unknown underground space. The simulation test results showed that the localization using improved particle filter had more locating accuracy in unknown underground space and better computational real-time ability than extended Kalman filter. This method has solved the pre-localization problem of coal mining robot underground.

In order to accurate the positioning of conveyor belt internal wire rope damage, a joint recognition algorithm based on corner feature vectors was proposed. Reference point for the joint, the joint image intact was selected According to the normalized product correlation algorithm, the Haar wavelet response distribution was calculated by using the Harris corner points as feature points, each joint was identified according to the feature vector matching of joint image. Experiments show that, this algorithm not only has good illumination robustness and recognition rate, but also has high speed and high efficiency, which can effectively solve the joint identification and fault location.

Based on pressured-mercury testing and fractal theory, studying on pore size classification, pore development characteristics and pore fractal dimension. The results showed that the pore system of Longkou lignite was divided into three parts. The pore with a radius over 1028nm was macro pore; the pore with a radius less than 72nm was micro pore; and the pore with a radius of 72~1028nm was transition pore. The porosity ranged from 10% to 15%, and the mean was 12.669%. The specific pore volume ranged from 0.09ml/g~0.13ml/g, and the mean was 0.115ml/g. The specific surface area was between 39m2/g and 70m2/g, and the mean was 56.529m2/g. The pore development of coal sample was great, and pore volume and surface area were large. The pore volume of micro pore was more than 80% of the total capacity, and micro pore was spread more evenly. The fractal characteristics of macro pore and transition pore was very good and the average fractal dimension was 2.56, which showed that this part of pore had greater pore structure and permeability was better.

In this paper, the pyrolysis experiments of Dayan lignite, Xiezhuang bituminous coal and Xiyang anthracite carry out slowly at the atmosphere of N2, in order to study the effect of different kinds of coal on the transferred law of carbon, it is helpful to calculate the quantity of carbon reacting at the gasification phase in mass balance model of UCG. The results show that: in the pyrolysis process, the transferred law of carbon is related to coal rank, a(C, gasification carbon) is the carbon content ratio of gasification carbon to raw coal, and the average of a(C, gasification carbon) for anthracite is 93.19%, it is bigger than lignite and bituminous coal, the average of which is both 78%, but the carbon content ratio for other pyrolysis productions is very little and the range is between 0 and 1%; for lignite and bituminous coal the maximum of a(C,tar) is 10.36% and 14.53% at 600℃; a(C,CH4) and a(C,C2H4) are related to volatiles content in raw coal, for bituminous coal they are both greater than lignite; a(C,CO) and a(C,CO2) are related to oxygen content in raw coal, for lignite they are both greater than bituminous coal; the nitrogen and sulfur element are existed inactively in the bituminous coal, so a(C,COS) for bituminous coal is less than lignite, and the rising rate of a(C,HCN) for bituminous coal decreases gradually.

The floc size distribution fractal expression was established according to the fractal theory, in order to study the distribution characteristics of floc particles of the slime water flocculation process. The results show that in the double logarithmic coordinates, the cumulative distribution function of the particle size is linear with the particle size distribution, which indicated that the size distribution of the particles has fractal characterizations; the fractal dimension of the particle size can be used to evaluate the distribution characteristics quantitatively in the flocculation process; the fractal dimension D and the average particle size of Dave are positively related, and the content of each particle has a great influence on the fractal dimension of grain size, and the smaller the proportion of fine particles, the larger the fractal dimension of the grain size in the particle system.

In this paper, float-sink test for ZhunDong coal was studied. Then the ash chemical compositions and melting characteristics are analyzed to explore the segregation of minerals in ZhunDong coal in different density degree. The research results show that because of different formation, density, etc of minerals in ZhunDong coal, the contents of SiO2, Al2O3 and Fe2O3 of coal ash chemical composition assemble to the high level density degree samples. The contents ofCaO, MgO and SO3gather to lower density degrees. And the contents of TiO2 and K2O+Na2O are stable. The mullite (3Al2O3.2SiO2)generated from Al2O3 and SiO2 under high temperature is the main reason that ash fusion temperature of ZhunDong coal showed a rising trend with density increased. Due to generation of low melting point compounds, such as Al2O3.SiO2.Fe2O3, FeO.SiO2 and 2FeO.SiO2 in reducing atmosphere because of the low SiO2 and high Fe2O3, the coal ash melting temperature of enrichment samples from of 1.5-1.8 density degree is low.In addition, the slagging indices, such as acid to alkali, silicon value, sodium oxide content and sulfur content, indicates that the ZhunDong coal showed lower fouling and slagging characteristicsafter flotation segregation of minerals.

By using the special vehicle in coal, the longwall equipment is carried quickly. Because of the massive use of special vehicle in coal, plenty of energy is consumed, and tail gas is released seriously, and the circumstance in coal is polluted, and the mental health of the workers is influenced. Based on the characteristics of special vehicle in coal, in the word, some energy-saving ways are analyzed and some methods to cut down the energy consumption are suggested from dynamic system and driven system and frame construction of the vehicle, which will promote the development partly about energy-saving special vehicle in coal.

Through building the full load articulated rubber-tyred vehicle’ mechanics model at static turn, analyzing the resistance torque caused by the interaction between tire and road，and the transmission parts’ wring of the double axle. Considering the effects for resistance torque from the friction coefficient, the load variation of wheel, the rolling velocity of wheel and the wheel steering angle and so on, introducing the LuGre dynamic friction model, building the relational model between the resistant torque and wheel steering angle of articulated rubber-tyred vehicle at static turn. By MATLAB simulation results show that with the wheel steering angle increasing the resistant torque of articulated rubber-tyred vehicle at static turn have a overall upward trend, and the greater the wheel rolling velocity the greater the maximum moment of resistant torque. The simulation and experimental results have preferably coherence, so it can provides a more appropriate theory for the designing of the articulated steering system.

The coal mine drilling rig in the dry drilling construction, will inevitably produce dust pollution. The wet dust removal system used in the mine is good, but the volume is large, the installation is more complex, and the effect of the dust suppression can be generally. Therefore, it is necessary to develop a dry dust removal system, which has a small size, good effect. It is necessary to solve the construction dust pollution and improve the construction environment. The new type of airborne dust removal system is developed on the base of the bottom board, which can improve the working environment and improve the operation efficiency.

The uncertaint completion time of the mining area is caused by the driving speed of coal mine roadway.And the driving speed is affected by the geological conditions and management of technology and equipment,and so on. In order to cause the entire mining area construction period schedule is variable.The possibility construction period of mining area is expected to combine CPM and probability distribution of the mathematical analysis method in the 31 mining area of Qinan Coal Mine production technology condition. Which is make the schedule to be completed on schedule. The method can also provide reference for similar engineering construction is expected.