Based on the need of coal industrial upgrading in the norm of the new economy，this paper expounds new-style coal mine construction that safety，green，intelligent and efficient is mainstream in the future.and the industry gradually has higher requirements on the design quality and the availability of scientific research，combining the present situation of the design，research and engineering construction，proposed the development mode of " Twosome，Trinity "，then discusses the connotation of broad sense and narrow sense about mode and great significance to the transformation development of enterprises, industrial upgrading and national energy reform. According to the example of Twosome by China coal research institute and China coal xi’ an design company，analyzes the auxo-action by the development mode of "Twosome，Trinity" for design quality，research achievement transformation，market expanding and transformation development.

Based on the research background of Datong mastery of the integrated and reorganized coal mine, the feasibility of 9# coal bed kicking and the stability of coal pillar in 12# coal bed pillar type mining area are first determined by theoretical calculation, and then the rock stratum structure in the kicking of 9# coal seam is revealed by the technology of borehole flooding and borehole peeping. The results show that the height distance of the overlying strata in the room column residual zone is not more than 10m, the height of the fracture zone is about 25m, and the 9# coal seam is located in the curved subsidence belt .The rock stratum has only internal damage, no large-scale step subsidence, good integrity and integrity, can be exploited by kicking mining.

In order to explore the effect of precise design and fine blast working process on loose blasting of rock mass in open-pit coal mine, this paper put forward several technical methods, including using air-deck charge structure and high density coefficient blasting technique, controlling the length of filling and charging, air-water coupling on handling holes with shoal water, which aim to solve the problems of soft-hard interbedded rock mass with horizontal bedding, unevenness of the bench surface and water-contained holes. Results of field tests indicate these methods can both improve blasting effect and reduce the cost of loose blasting.

Based on the need of coal mine safety production and automatic set control system, the paper studies the domestic coal mine drainage monitoring system, and puts forward the Ifix configuration software as the platform, adopting Siemens ' S7-300PLC series module. The mine drainage centralized control system based on iFix is designed and implemented, and successfully applied to Renlou mine drainage system. The hardware and software design of the system are introduced. Through simulation and field test, the results show that the system can realize automatic data acquisition, fault monitoring and alarm, rational start-up and centralized control of pumps. A new energy saving method of water pump is proposed, which realizes better energy saving effect.

Firstly,the paper analyzed the ecological environment impact characteristics of surface coal mine in arid grassland. Second,the key points of ecological environment impact evaluation in this area are put forward.Thirdly,the paper taked Shengli surface coal mine as an example, analyzed ecological effects from the perspectives of land use, vegetation cover and soil erosion,at the same time, the retrospective analysis method, GeoEye remote sensing image and QuickBird remote sensing digital image were used.

A parametric modeling method for hyperbolic weigh bin is proposed to solve the problems of repetitive and complicated modeling process and modification process. Each part of the hyperbolic weigh bin is modeled and model parameters are set by using Creo Parametric software and skeleton modeling technique. The assembly model of hyperbolic weigh bin is obtained by assembling the part models in the default way. The parametric modeling of hyperbolic weigh bin is realized by using the relational expression to correlate the parameters of each part and setting the parameters program in the assembly model. The results show that this method achieves the effect of driving the whole model with minimum parameters and greatly improving the design efficiency of hyperbolic weigh bin, which provides a strong guarantee for the standardization and serialization design of hyperbolic weigh bin.

The thickness of alluvium is 704.6m in Zhaogu No.2 coal mine, and West Air Shaft is the fourth 700m alluvium shaft. The design thickness of the deepest control horizon on sandy soil is 10.3m, and its average temperature is -21.5℃. The design thickness of the deepest control horizon on clay is9.9m, and its average temperature is -19.0℃, The height of excavation template section is 2.5m. The regulate and control of frozen wall design thickness, average temperature and sidewall temperature is not only valuable to test scientific rationality of design thickness but also significant to safe, economical and fast construction. The frozen wall formation characteristics measurement , engineering forecasting and freezing control mechanism are proposed. The frozen wall design index is realized. Successful cases of safe and rapid construction in freezing section of over 700 m deep alluvium are obtained.

Based on the West Ventilation Shaft Project of Zhaogu No.2 Mine, the rapid excavation and masonry construction technology of ultra-deep topsoil freezing blasting is elaborated from the aspects of freezing scheme design, drilling and blasting construction, mucking and hoisting, waste stone exhausting, shaft wall pouring, construction organization and monitoring measurement. The multi-circle freezing tubes are used to freeze the deep topsoil to realize the dynamic regulation of freezing temperature under different geological conditions, and provide the most suitable frozen soil conditions for blasting. The rapid progress and good blasting effect are realized by continuously optimizing blasting scheme, assisted by vibration velocity monitoring. According to the earth pressure and the stress of the engineering structure, the concrete strength grade is adjusted in time to ensure the stability of the shaft. The shortest construction time and optimal economic benefit is implemented by adopting the project management method and taking the premise of engineering safety quality. The construction time will reach the optimal economic benefit. Rapid excavation of deep and large shaft is realized by adopting “roll work in shifts” in outer wall construction, and “three shifts” in inner wall construction. This research work can provide a certain engineering reference for the similar construction of super-deep frozen soil vertical shaft.

It is known that the phenomenon of high pressure, water leakage, fully mechanized supports crushing frequently occurs in the roof of working face with large mining height, which under thin bedrock and thick weathered or oxidation zone. In this study, a new type of L-shaped directional branch hole structure is adopted to pre-grouting the thick weathering and oxidation zone, so that some reasonable grouting parameters and grouting technical measures are designed for prevent the supports crushing accident during coal mining. Engineering practice show that, ground pregrouting with multi-permeability source is used to reinforce the seam in weathering and oxidation zone, which can bear high grouting pressure, improves the mechanical behavior of overlying surrounding rock structure, filling the water channel of upper aquifer and block the cranny water of coal seam roof. On that basis, high-strength hydraulic support is used suitable, then safety mining is accomplished. research provide a new technical approach for mining under thin bedrock coal seam of the similar geological conditions.

For the purpose of preventing the methane from exceeding the recommended safety levels in underground working face as well as improving methane drainage effects of gobs. In this study, the combination of theoretical analysis and field measurement is used to study methane extraction effects of the surface directional borehole (SDB) along the working face advancement by analyzing the variation of methane concentration and pure flow rate. The results show that when the working face is advanced to about 600m-810m from the open-off cut, the methane concentration and pure flow rate of the SDB are the highest, which are 1135m3/h and 75.5% respectively, and thus the optimal well location and horizon of the methane enrichment zone corresponding is determined. The study results provide guidance for determining the optimal location and position of SDB, surface vertical borehole and so on.

Aiming at the need of area and advanced treatment of gas in ultra-long working face, analyzed the technical requirements of key drilling equipment for ultra-long directional drilling along coal seam, summarized and compared the performance characteristics of several typical key drilling equipment for ultra-long directional drilling along coal seam in domestic and abroad. According to the production requirement of ultra-long working face in Baode Coal Mine, optimized the drilling equipment and carried out the engineering practice in the second panel area of Baode Coal Mine. Three ultra-long directional boreholes with diameter of 120 mm and depth of more than 2000 m have been completed, among which the maximum borehole depth is 2570 m, creating a world record of the depth of directional boreholes along coal seam in coal mine. Combined with drilling process parameters and measurement data, analyzed the application effect and limitation of key equipment, and presented the prospect for further improving the capability of ultra-long directional drilling equipment along coal seam.

The 12401 fully mechanized mining face of Shangwan coal mine of Shendong mining area is the world's first 8.8m large mining height working face. According to the actual measurement, the law of mine pressure appearance was summarized, and the applicability of the support was also evaluated. The results show that the initial pressure distance of the fully mechanized mining face is 45m, and the pressure is relatively large; the periodic pressure shows obvious continuity and phase, and the periodic pressure distance increases from an average of 10.05m to an average of 12m, and then rises to an average of 16.4m; the cycle of alternating pressure distance gradually appears, and the pressure intensity also has an alternating size; as the mining distance increases, the number of large distances increases, the number of strong pressures increases, and the mine pressure becomes stronger; when the mine pressure appears severe, there is indeed a case where the estimated working resistance exceeds the working resistance of the selected supports, but the number is not much, the opening rate of the safety valve is low, and the reduction of the living columns is small, so the selected supports can meet the needs.

Abstract：In order to accurately analyze the law of rock pressure, a new analysis technology of regional rock pressure in working face based on large data of support working resistance is put forward. The new concept of regional analysis of working face is defined. Based on the monitoring of working resistance of single support and the analysis of the law of strata pressure appearance, all monitoring supports in the same coal cutting cycle are divided into regions. Regional strata pressure analysis can obtain the main parameters of strata pressure appearance, such as the starting position of regional weighting, weighting step and weighting strength, which can provide information for roof management of working face Support.

Permeability enhancement by hydraulic jet cavity gas pre-drainage to prevent regional outburst has been tested, The test site is selected in the 150112 air return way heading face of Shanxi Lu'an Group Yiyuan coal mine which is a outburst mine. The process of forward hydraulic jet cavity was adopted in the test. 5 hydraulic jet cavity drilling with length of 120m were hit on the heading face, and 52 cavity were jet. The size of the cavity is a cylinder of 1m×?0.8m, the water pressure of the cavity making is 16-18MPa, and total amount of slag is 150t. Through this test, the results are as follows: boreholes，the hydraulic jet cavity can increase the average gas extraction amount from 62m3/d to 316m3/d. In the process of tunneling, the gas concentration of heading face return air is reduced from 0.7% to 0.4%. The water content in coal seam of jet cavity area is higher than that in the not jet cavity area, pulverized coal is reduced, the amount of dust in the process of tunneling is reduced, the number of gas dynamics is reduced, and the efficiency of tunneling is greatly improved. However, the process of hydraulic jet cavity will cause certain damage to the coal seam structure and roof and floor, during the tunneling, we need to strengthen the support management of the two sides of the roof and roadway. Moreover, the technology of hydraulic jet cavity is not suitable for mines with soft rock in the top and bottom of the roadway.

In view of the problem that the retracement channel is affected by mining and the stability of the roof of the roadway is poor and the deformation is large, the 20117 retracement channel of Gaojialiang Coal Mine in Inner Mongolia is taken as the engineering background, and the reinforcement plan of the retracement channel roof is proposed, and the anchor beam structure of the retracement channel is established. The mechanical model analyzes the stability of the anchor beam structure theoretically and conducts field practice in the 20117 retracement channel. The results show that the displacement of the top and bottom plates of the 20117 retracement roadway is small, and the roadway is relatively stable. The optimized anchor (net) cable and truss type support method can strengthen and strengthen the surrounding rock and control it well. The deformation of the surrounding rock ensures the safety of the working face.

:High gas mine working face is prone to spontaneous fire during stoppage of production and removal of support, thus causing gas explosion.There are some spontaneous combustion characteristics such as serious air leakage in the goaf, high temperature fire area near the goaf, and more residual coal in the goaf, etc. Nitrogen injection, grouting, wind plugging, spontaneous combustion prediction and other fire prevention were implemented.The gas monitoring results showecd that during the end of mining and removal of supports, the volume fraction of CO and O2 showed a trend of first low, then high and then low, and the CH4 volume fraction ranged from 0.5% and 1.3%.After air stopping, the concentration of CO and O2 ranged from 1×10-6 ~ 11×10-6 and 0.01% ~ 0.09% respectively.The concentration of CH4 ranged from 0.24% ~ 1.48%, it showed that comprehensive fire-fighting technology has a good inhibiting effect on the spontaneous combustion of goaf coal. The gas concentration of CH4 is in a safe range, which ensured the safety of the working face production.

Limestone-gypsum wet desulfurization is used in coal-fired power plants widely. This device would generate some wastewater which contains much pollutant. In recent years, more and more zero emission roadmaps of desulphurization wastewater disposal has been developed, and many demonstration projects have been built into operation. This paper classifies these methods into three units：pretreatment, concentration and solidification, which can be combined as one complete technology roadmap. This paper concludes the advantages and disadvantages by analyzing reliability, economic cost, and practical effect of demonstration projects, then gives out technically feasible advice for desulphurization wastewater disposal on future lager scale use in coal-fired power industry.

In order to solve the disturbance caused by the coal pillars in the upper coal seam to the lower coal mining roadway, this paper takes the 13313 main gate of thick coal seam face in Shanxi Shide Sunjiagou Coal Mine as the engineering background, the system research is carried out in combination with FLAC3D numerical simulation in three aspects: surrounding rock stress, surrounding rock strength and supporting technology. The results show that the stress concentration zone is formed under the left coal pillar. The larger the remaining coal pillar size, the smaller the lower stress peak, and The stress environment is greatly improved when the main gate of the lower coal seam are out of alignment for 25m from the left coal pillar. Further in-situ testing of roadway surrounding rock strength is carried out, and the technical scheme of high prestressing and strong support is determined. Mine pressure monitoring shows that the roadway support scheme is reasonable and can meet the production requirements, so as to solve the technical problems of dynamic pressure roadway support in Extra-thick Coal Seam under coal pillar.

Based on the engineering background of the +450 horizontal No. B3+6 fully mechanized top-coal caving face in the approximately vertical coal seam of Wudong coal mine, the spatio-temporal evolution of microseismic events before the occurrence of rockburst was studied aiming at identifing the precursory information of rockburst. The deviation index of microseismic energy and frequency reflecting the degree of energy release anomaly of coal and rock was established. The evolution law of microseismic energy, frequency, deviation index and spatial distribution before rockburst were analyzed. The results show that before the occurrence of rockburst, the daily total energy of microseismicity fluctuates sharply and drops to a low value. The daily event count of microseismicity rises and falls sharply. The deviation index of microseismic energy tends to appear higher, and this value is generally greater than 20. The deviation index of daily event count of microseismicity experiences a peak value, which is greater than 0.8. Microseismic events are spatially concentrated toward the mining face, and the number of microseismic event with high energy increases. The results provide reference for the monitoring and early warning of rockburst in No. B3+6 fully mechanized top-coal caving face and other coal seams with similar mining and geological conditions.

Aiming at whether the coal seam water injection will reduce the lump coal production rate of anthracite fully mechanized caving face, the indoor uniaxial compression test method is used to study the compressive damage of the anthracite sample with natural moisture content and saturated water content under controlled compression conditions. The distribution law of the broken block degree is as follows: (1) Water injection reduces the peak strength and elastic modulus of anthracite, enhances the plastic fluidity and residual strength after the anthracite peak; (2) Water injection causes the coal to be damaged by pressure After the block distribution is more uniform, it indicates that the coal seam water injection can reduce the large coal volume in the fully mechanized caving mining, increase the medium coal mass, and the small block and the amount of pulverized coal basically have no change; (3) Anthracite compression crushing block The degree-mass distribution conforms to the fractal law, and with the increase of the water content of the water injection, the fractal dimension of the block-mass distribution after the sample is broken is reduced, that is, the uniformity of the coal fracture block is improved. The research results show that the implementation of coal seam water injection in the fully mechanized caving face can not only soften the coal body, increase the top coal release rate, but also increase the medium-size coal volume with high sales price, which is of significance to improve the economic benefits of anthracite production enterprises.

The vertical three-way pipe are common pipe fittings in the filling pipeline system, and the flow resistance affects the operating energy consumption of the entire pipeline system. In this paper, the experimental parameters were obtained by using the whole tailings to prepare filling slurry. The Fluent numerical simulation software was used to simulate the two flow modes of the filled slurry in the three-way pipe. According to the velocity and pressure distribution of the filling slurry, the local and path resistance loss of the pipeline is analyzed. Combined with numerical calculation, the local resistance coefficient of the two types of pipes is obtained and the reasons for the changes are analyzed. It has certain guiding significance for the filling pipeline design of mines.

Due to the frequent blasting vibration in open pit mining, the slope failure mechanism and stability analysis are extremely complicated, which is a serious threat to safety production. This paper takes the mine excavation slope as the background, bases on engineering geological conditions and field test, uses the combination of theoretical analysis and mathematical calculation to quantify the blasting load, then establishes a slope blasting damage calculation model and determines the slope failure time and the most dangerous area. At the same time, verifies the accuracy of the calculation results by numerical simulation method. The results show that the upper step of the slope destroys after 7 times blasting, and the most dangerous area is located at the initial position of the blasting of 120m ~160m. The numerical simulation results are consistent with the calculation results, which fully verifies the accuracy of the method.

Program comprehensive design of geological engineering is one of important practical teaching processes in the course teaching system of geology in mining colleges. In order to cultivate geological talents to meet social development needs in the new era and improve undergraduate teaching quality, a program comprehensive design of geological engineering with distinctive "mining" features is being carried out for undergraduates. The main contents, implementation process and application of three-dimensional numerical modeling in the program comprehensive design of geological engineering were introduced in this article. Not only did the program comprehensive design of geological engineering improve students' practical ability of analyzing problems comprehensively and applying theoretical knowledge to solve practical problems, but also cultivated students' innovative thinking and spirit and laid a solid foundation for the cultivation of high-quality coal geological talents henceforth.

Grouting anchoring quality fast, accurately and extensively. Based on the law of stress wave transmission and reflection in the anchorage bolt grouting, a nondestructive experimental research focused on the grouting anchor length and the solidity of the grouting quality was conducted. Furthermore, the theory of wavelet transform is used to analysis the test signals. The study show that grouting anchor free length could be accurately detected through the analysis of the stress wave signal by using of the low pass filter in the wavelet toolbox, the grouting anchorage length, defection length and specific location of the anchoring section can be accurately detected through the analysis of the stress wave signal by using of the high pass filter in the wavelet toolbox. This research results can offer an experiment foundation for the further study of grouting anchoring quality based on the nondestructive methods.

Mine transformers are mainly used in mines containing flammable gases and coal so as to provide power for coal mining machines, transporter and lighting systems. At present, because the accuracy of mine transformer fault detection is not high, this paper presents a fault diagnosis method for mine transformers based on improved cuckoo algorithm and support vector machine (SVM). In this paper, the improved cuckoo algorithm is introduced to optimize the parameters of the SVM, and the SVM model with the best parameters can obtain, then the transformer faults are classified by using the support vector machine. Finally, the effectiveness of algorithm and detection method is verified in this paper. Matalab simulation results show that using algorithm and diagnosis model in this article provides better overall performance than other method.

In order to improve the operability of on-site disposal schemes in coal mines, an automatic generation system of disposal schemes for coal mine accidents based on expert system is constructed. The system integrates emergency plans, safety rules and regulations, rescue and disposal methods and experiences from experts and accident cases. The generated disposal schemes can be reasoned according to the real-time information of the accident scene. Besides, commanders can input inquiry information to search historical accident cases which meet the inquiry conditions and are most similar to the current accident characteristics for obtaining practical experience knowledge support.

In order to solve the problem of flotation of coal slime,the influence of pH and metal cations on the coal flotation and flotation kinetics of coal slime was investigated. Results showes that the kinetics of coal flotation at pH 5.5 and 7.2 were higher than the other pH in all flotation process, whilst the ash flotation kinetics was lower than the other pH; According to the analysis of flotation kinetics,the effect of adding different metal cation on ash recovery is higher than that of coal, and the flotation rate is also increasing. In addition pH can effectively improve the coal recovery, whilst adding metal cation can leading the decreased of coal recovery.

In order to investigate the effect of collector, foaming agent and ultrasound frequency on enrichment rate of vitrinite. Single factor experiments and response surface experiments were carried out with a self-designed ultrasound flotation device, the surface morphology and pyrolysis characteristics of flotation concentrate were explored by SEM, FTIR and TGA analysis. Research results shown that when the collector, foaming agent and ultrasonic frequency was 0.9g/L, 0.11g/L and 100KHz, the enrichment rate of vitrinite reached a maximum of 76.98%. The response surface experiments shown that the enrichment rate of vitrinite could reached a maximum of 79.27%. Ultrasound treatment reduced the surface minerals of coal, and the TG analysis shown that ultrasound treatment decreased the weight loss and the rate of weight loss of vitrinite, while had no significant impact on inertinite. FTIR shown that oxygen-containing functional groups of vitrinite was higher than that of inertinite, while aromatic hydrocarbon of was less than that of inertinete.

Abstract:The buffer component is an energy absorbing component in the case of over winding buffer, and its mechanical properties directly affect the effect of overwind buffering. In order to select the buffer component with better mechanical properties, taking the combination of steel strip and silicone rubber type buffer component as research object, make mechanical calculation and analysis. And using ANSYS to simulate the mechanical analysis of the cushioning element, the influence of the thickness of the silicone rubber and its position on the buffer component of the mechanical properties was investigated when the thickness of the steel strip was constant. The analysis results show that: when the structure and size of the overwind buffering device are constant, the horizontal distance c between the dynamic pressure roller and the fixed pressure roller is 4.5 mm when the over-rolling is applied, and the total thickness of the steel strip in the buffer component is fixed at 4 mm. When the thickness of the silicone rubber is 3 mm, the thickness of the left side of the silicone rubber is 1 mm, and the thickness of the right side of the steel strip is 3 mm, the mechanical properties of the cushioning element are optimal.

General industrial and mining enterprises of electrical equipment often adopts the over-current protection air switch to achieve the corresponding rated current, or a maximum supply generator, power distribution cabinet to achieve current limiting protection, these programs are not very flexible, not very safe. Design of a mining electrical equipment external flow alarm, using the current secondary measurement of main circuit of current transformer, two secondary induction current in series with a variable sampling resistance, if the main circuit current exceeds a predetermined (in electrical equipment to the premise of the work can be scheduled) current sampling resistor voltage light LED LED, photosensitive resistance was light, the resistance decreased dramatically, flip-flop outputs high level, cut off the main circuit power supply, and trigger multivibrator oscillation output square wave, achieve sound and light alarm. This design can be integrated into the power distribution cabinet circuit, more clever can be independently designed as a module, the alarm module in the premise of ensuring the normal work of the next load can be applied to almost all the electrical equipment system.

Aiming at the problems of artificial laying track, sports car and off road in the process of traditional winch traction equipment train transportation, a long-distance self-moving equipment train is proposed, which consists of self-moving traction device, self-moving flatbed, heavy rail and concentration. The control system consists of four major components, with a total length of about 230 meters. With hydraulic power as its own, it has its own track, and it is highly integrated with the functions of self-moving, walking shifting and anti-dropping of the train, so that the traction device can drive the whole equipment train to move forward. It adopts safe and reliable electro-hydraulic control system, ring liquid supply, multi-group remote control and other technologies, and uses multi-sensor feedback closed-loop control mode to ensure that the train synchronously rises and falls smoothly and follows the self-moving traction device to synchronize the forward electro-hydraulic The control system realizes the automation technology of the equipment train, so as to realize the development and demonstration application of the intelligent system of the comprehensive mining equipment.

In recent years, China's coal safety production situation has continued to improve, but serious accidents still occur from time to time. In order to fundamentally improve the safety management level of coal mines, based on the exploration of coal mine safety risk identification and standardization, combined with the analytic hierarchy process and set pair analysis, the paper established the AHP-SPA coal mine safety evaluation algorithm model, based on the "three in one". The system, according to the weight, establishes the coal mine safety evaluation index based on the coal mine standardization rating, and realizes the dynamic evaluation of the coal mine safety management effect. Finally, the AHP-SPA safety management model was applied in Jining No. 2 Coal Mine to verify the applicability and reliability of the model, which provided new theoretical and technical support for coal mine safety management.