In order to promote efficient of auxiliary transportation of shafts of Shanxi Coal Group Zhaozhuang Coal Company and Shandong Xinkuang Group Xinjulong Company, new explosion-proof diesel engine trackless rubber wheel vehicle was designed and developed. The ratio between volume and load of the vehicle is small, and the cargo volume is large. The vehicle is mainly used for the transportation of underground ordinary materials and equipment. Discusses the main points of design and key technologies of the vehicle from overall plan design，design of explosion-proof diesel engine system，matching design of transmission system，frame design，design of large load-bearing dump box and lifting device. The usage indicates that the whole vehicle is completely suitable for the mine，which has outstanding advantages of high operation speed, high transport efficiency, as well as excellent energy conservation and emission reduction.

Trackless auxiliary transport vehicle had many kinds and custom types products, that brought variety subdivision vehicle and gave cause for a great deal of parts, non-interchangeable parts and difficult production organizing. In order to solve the above problems, modularized design method was proposed. By analyzing the structure style and system composing of trackless auxiliary transport vehicle, this paper proposed built some product platform between relative type of vehicle, which was adopted to carry on modularized design. Besides, detailed modularized design way and method was present, and process of modularized design was introduced by taking the gate roadway vehiclethe for example. In the end, the connected method between different system module of the vehicle was father expounded, the universal design of assembling interface was discussed.

Aiming at resolving the problem of driving range shortage of Flameproof Lithium Battery Electric Vehicle（FLBEV） during its usage in coal mine auxiliary transportation, energy conservation control technology was proposed in its design process. According to the system configuration analysis of FLBEV, three kinds of energy conservation control technologies were analyzed to extend its driving range. Moreover, these technologies had been used in the design of FLBEV, realizing vehicle energy consumption reduction for 20 % and s driving range promotion for 15 %, which effectively promoted the application of battery electric vehicle in mine production and simultaneously accommodated the development tendency of green mining.

Abstract:By means of theoretical calculation and prototype test of the heat dissipation performance of the closed hydraulic running system of a certain type of large slope support haulage truck, the rationality of matching the oil replenishment and flushing flow of the hydraulic system is checked, and compared with the heat dissipation system of the same type of truck, it is clear that the lack of heat dissipation power of the hydraulic oil radiator is the cause of excessive oil temperature. Main cause. Based on the test data, the heat dissipation power of the system is increased by connecting the auxiliary radiator in series and opening the vent. The problem of excessive oil temperature of the vehicle is solved. The prototype has been successfully tested for more than three months. Good application results provide a solution for other similar engineering problems.

Abstract: In order to effectively solve the problem of large slope traction of track miner in coal mine, the design technical requirement of the rubber wheel tractor were obtained through the study of the operating environment conditions of the underground track miner. And through the matching calculation of the key technical power system of the vehicle and the research of the swing compensation traction device, the overall arrangement scheme of the tractor is designed. Finally, the first tractor completed production, and has carried on the underground industrial test, the result shows that this scheme has effectively solved the traction problem of the track harvesters.

This paper reviews the role, structural characteristics and operating environment of JOY10SC32-48B shuttle car in short-wall mechanized coal mining, introduces two common typical faults of oil pump motor which can not start and walking motor which can not drive electricity in the process of using the equipment, and expounds the corresponding system control circuit combined with product maintenance and maintenance respectively. In this paper, the causes and judging methods, treatment methods and matters needing attention of the faults are analyzed in detail, and the reduction of the fault rate of the electrical system is studied. It is necessary to strengthen the routine inspection of the equipment, improve the quality and assembly process standards of the components, improve the performance test of the components and the whole equipment, and formulate the monitoring, monitoring and control of the actual working conditions. The concrete measures of the diagnosis scheme reveal the practical significance of maintenance management, fault diagnosis method and practical guidance for this type of shuttle car.

The problem of tire deviation often occurs during the use of domestic frame type stents, that is, after a period of use, the four tires on the rear frame are not evenly worn, and one or two rear tires on both sides are more worn than the rest of the tires. Through tracking and observation, the rear tire will be temporarily locked or reversed under the operating conditions of the loose valve in the vehicle running, resulting in non-rolling friction, resulting in abnormal wear. Based on the operation mechanism of the closed system with single pump and two motors, the forming process of hydraulic braking force is analyzed，at the same time, combining with the mechanical structure of the vehicle, it is further demonstrated that the adhesion of the rear is less than the adhesion of the front tire in the process of vehicle loose throttle, so the back tire easily reverses and causes abnormal wear, thus forming partial grinding. By adding controlled overflow valve in the loop, the closed type walking system is optimized. After the installation is applied for half a year, the partial grinding phenomenon can be eliminated, the service life of the tire is improved effectively, and the running cost of the whole vehicle is reduced.

This paper introduces the development and application status of trackless rubber-tyred vehicle in our country's mines, points out the development bottlenecks existing at present, such as large exhaust emission, high fuel consumption, high noise, high maintenance cost, poor adaptability of roadways, etc., and analyzes the countermeasures from the three links of power, design and manufacture, and test, so as to provide ideas for the development of trackless rubber-tyred vehicle in our country's mines in the future.

“Reduction” is an important part of the construction of green mines. However, it has been proposed for several years only to use the term “island” and has not formed the awareness of system-wide coverage of industrial production. In view of the main solid wastes (gangue, coal slime) in the field of coal production, this paper introduces the ways to realize the reduction of production, and proposes to promote the concept of reduction in the whole process of production, and apply this generalized reduction concept to the construction of green mines.

This study is to determine the width of section coal pillar for fully mechanized top coal caving face with hard roof and extra-thick coal seam. The W1123 working face in the Kuangou coal mine was selected as a case study. Based on theoretical analysis, numerical calculation and engineering practice, the reasonable width of coal pillar is determined. The research indicate that the stability of segment pillar is mainly affected by the main roof breaking and repeated mining. when the coal pillar width is 5~10m ,the stress of pillar inside is higher, the plastic zone is connected and its area is large. When the coal pillar width reaches 13~20m, the distribution of stress is relatively smooth, the peak value of stress decreases gradually, and the percentage of plastic zone decreases rapidly to 28%、16%and 6.3%. On the basis of considering the stability of roadway and improving the recovery rate of coal resources, the reasonable width of coal pillar is determined to be 15m, meanwhile the combined support systerm of “bolt+cable+anchor net+steel belt” be put forward. The research results can provide a useful reference for the determination of coal pillar with similar engineering conditions.

According to the complex condition of broken roof under extreme close repetition mining, taking the determination of 4303 mechanized mining face in the fourth panel as the engineering background, firstly, the support strength was determined as 587.25kPa by theoretical analysis separately, and the type of ZY5000/12/26D support was developedbyVisual R & D program. Finally, from aspects of support resistance, operation characteristics, Initial bracing force, coal wall slate and roof fall, the suitability of the support was verified by engineering practice. The application of the support is good and itprovides reference for the design of supportin similarcondition.

According to the condition of long-distance (about 7 km), height difference and complex terrain of Feitian coal mine and coal products to the White Horse Cave railway freight station, the transportation mode with straight line connecting head and tail points is difficult to implement. Therefore, the long distance horizontal turning belt conveyor is adopted, and the transport scheme is designed, selected and calculated. Because the equipment can be bent horizontally and vertically, the circular layout method is adopted to avoid the complicated terrain section and realize the uninterrupted transportation from the mine to the railway station.

In open-pit design and overall planning, it is the common methods that everyone delimit open-pit mining boundary through drilling stripping ratio contour. But in fact, there have some open-pit area cannot be developed economically which designated by the overall planning. In this article, first starting from the definition, then through the regulation of standard and some example, analyzed the importance of stripping ratio in open-pit mining design. Finally analyzed drilling stripping ratio have some limitations and should be taken seriously attention. The special cases in this article are important guiding for setting boundary of open-pit design and designating limits of overall planning.

The choice of steering mode in open pit mining area is related to the development of transportation system layout, production stripping ratio and comprehensive transportation distance during the turning period and the post-steer mining area, which directly affects the overall economic benefits of the mine. Combined with the specific coal seam occurrence conditions of Xinjiang South Open-pit Mine, comprehensive consideration of the factors affecting the steering mode, through the program comparison, the optimal plan for the transition from the first mining area to the first mining area was determined, shortening the transition time and ensuring the output connection. The inner row space is released in advance.

As the new generation trestle bridge in China, modular trestle bridge overcomes many common defects of traditional truss trestle bridge, with better quality, shorter construction period, more safe and reliable construction, green construction and higher economy.

The raise boring has the advantages of high mechanization, fast construction speed and good safety. When using the raise boring construction to replace the ventilation shaft in the mining area, the existing roadway and production system in the underground mine can be fully utilized. The mechanical rock breaking phase has lower disturbance intensity than the blasting rock, and the shaft support stability is good. It is conducive to the protection of the environment after mining and closed pits. The formation conditions are one of the important factors that determine whether the large diameter raise boring construction is going smoothly. According to the geological conditions of the proposed ventilating shaft and the design requirements of the shaftbore. Specific raise boring equipment and related parameters were determined. Technical difficulties in the construction of raise boring through special strata are proposed. The key technologies for the construction of the raise boring foundation platform and the use of pre-grouting technology to reinforce unstable formations are given. Through the implementation of ventilation and cooling technology, the raise boring has successfully passed through the gas-bearing coal seam. It provides a ref-erence for the construction of reverse shaft drilling to replace the ventilation shaft in the mining area.

In order to study the method of immediate inspection on the effect of pre-grouting engineering of 4-2 coal burnt rock curtain in Zhangjiaomao Coal Mine, this paper evaluates the existing single hole grouting end standard, and analyzes the influence of curtain grouting on the curtain belt and burnt area. According to the characteristics of fracture development and curtain engineering, it is proposed to examine the variation of the injected medium and the difference of hydrogeological units inside and outside the curtain from two aspects of one band and two zones. . The variation of injected medium can be analyzed by drilling and grouting feedback, and the difference of hydrogeological units inside and outside the curtain can be compared by the variation of water level and spring flow inside and outside the curtain. Engineering practice proves that the above instant inspection methods are considered. The road is correct and the conclusion is reliable.

Based on the engineering background of 6m high mining face in a mine, the support design of flexible die concrete along goaf is carried out. Focus on the design of roadway support parameters and floor reinforcement parameters, temporary strengthening supporting parameters. The engineering practice shows that the support parameters of the flexible mode concrete along the empty side of the 6m high mining face are reasonable and the effect is good, and has good economic benefit and application prospect.

Abstract :In order to solve the technical problems of roadway support under the conditions of narrow coal pillars in thick coal seams.Using the method of theoretical research and numerical simulation, the technology of forming pre-split kerfs by advance drilling in the roof was studied.The non-blasting method is used to realize the active control of the basic top fracture position, optimize the load bearing structure of the roadway roof, effectively reduce the additional load of the key rock cover to the coal pillar, and further ensure the stability of the roadway.Theoretical calculations show that when the cutting is not performed,the location of the fracture of key block B is 5.73m away from the goaf and close to the roadway above the narrow pillar.And under the action of the key block B, the stress on the narrow coal pillars is 17.76Mpa, the stress is concentrated. Stress concentration factor reaches 1.4. And the narrow coal pillars are easily destabilized.The numerical simulation results show that cutting the top of the drill hole in advance can effectively eliminate the influence of the key block B on the coal pillar to the narrow coal pillar.Through on-site industrial experiments, the overall length of the narrow coal pillars during the mining period is relatively stable, the displacement of the roadway roof and floor does not exceed 200 mm, and the shrinkage of the two gangs does not exceed 350 mm.The research results show that it is feasible to use the non-blasting method to achieve effective regulation of the roof structure and solve the roadway support problems. Key words: thick coal seam, narrow coal pillar, key block, advanced cutting , basic top breaking position

Abstract: According to the mining pressure characteristics of the close seam group in Donghuantuo Mine of Kailuan Mining Area, the plastic zone and pressure relief ratio distribution law of the surrounding rock of the underlying roadway under the two conditions of excavation before mining and excavation after excavation are studied by theoretical analysis and numerical simulation, and the pressure relief driving scheme of the underlying-690 horizontal return air roadway in the No.3 working face of Donghuantuo Mine is obtained, which solves the problem that excavation after excavation leads to large excavation. The problems of serious deformation and destruction of roadway and heavy overhaul workload provide a basis for roadway support design under combined mining of close-range coal seams.

Aiming at the problem that the large hydraulic support of Shanzhai Coal Mine can not be transported by the main transport roadway section of the mine and the capacity of main hoisting winch. Through analyzing the structure of the hydraulic support, the mine transportation condition and the geological condition of the mining area, Using the method of comparison and simulation, determined the stent disassembly and transport design. Design of the Open - Off cut by Simulation of Steering. Through the optimization of the depth of the small coal pillar winch chamber, the section size of the roadway section of the section and the relevant parameters of the layout method. Research indicates. ZF10000 / 20 / 32H type bracket disassembled into three parts to meet the bracket components in roadway transportation; The top cover of the stent adopts special loading platform for fast and safe transportation;When the width of Open-Off cut is 8 m, the height of Open-Off cut is 3.2 m, and the length of shaft bottom is 70 m,the large hydraulic support can meet the stent and fast scheduling.

In this paper, 1307 large height woking face in Zhaozhuang mine is appointed as the research background. The measures taken at the present stage to control the rib spalling and its shortcomings are summarized. Secondly, by analyzing the conditions of advanced abutment pressure, the uniaxial and triaxial compress experiment plan is made to explore the time of cracks in the coal begin to proliferate to determine the chance of grouting. Thirdly, problems such as the arrangement of grouting drills, grouting material and the longhole grouting sealing technology are analyzed to form a scientific and feasible scheme. At last, grouting effect is evaluated after the completion of the construction. The result shows that grouting has a remarkable effect and is beneficial to economics and safety.

Againsted the double hidden danger of spontaneous combustion and upper corner gas gauge in a super thick seam coal of Shan xi ,which was created by adjacent mining goaf respiration caused by mining process and simple gas drainage and poisonous gas leakaged, combined with occurrence and physical characteristics of goaf gas, proposed regional stereo replacement technology of surface hole drainage and nitrogen injection,.The practice results showed that the average concentration of gas and carbon monoxide in goaf reduced from 6% to 0.8%，reduced by 86%, reduced from 16ppm to 6ppm，reduced by 62%,with an obvious control effect,provided safety guarantee for production of small coal pillar and spontaneous combustion working face in extra thick coal seam.

In order to study the influence of wide strip mining on the village surface movement deformation, and establish suitable mining parameters, the paper analyze the data of surface movement deformation of the first panel strip working face based on the actual conditions of Tingnan Coal Mine. And the paper gets the law of surface movement and deformation of wide strip mining under the geological mining conditions. Combination of theoretical calculations and numerical simulation methods, Optimized strip mining options. The results show, it can be used to effectively control the thick coal seam wide strip fully mechanized caving mining surface movement deformation when the mining width is 100-116m and the leave width is 80-100m,which can realize safe mining under the first panel surface village buildings. The research results can provide basis for wide strip mining under the village buildings in Tingnan Coal Mine and Binchang Mining Area.

The stability of roadway compound roof is closely related to the location, thickness and composition of soft-hard rocks in roadway compound roof. The paper used the methods of field measurement, theoretical analysis and numerical simulation to analyze strata structure type of roadway compound roof in Zhaogu No.1 Mine, and study failure characteristics and rupture regularity of different strata combination of roadway roof. The study results show that roadway compound roof can be classified into four general structure types: the single-soft rock, lower-hard upper-soft, lower-soft upper-hard and soft-hard alternation according to the location and composition of strata. It is further classified into six sub-structure types: the single thick-soft, thick-soft thick-hard, thin-soft thick-hard, thin-hard thick-soft, thick-hard thin-soft and thin-soft-hard alternation according to the strata thickness. For the single-soft and thick-soft thick-hard roof, the shape after roof fall is conical, which is next to its upper part soft rock and forms the shape of beam. It is essentially "articulated arch" balanced structure, which eventually tends to be stable. For the thin-soft thick-hard and thin-soft-hard alternation roof, the shape after roof fall is flat. The upper hard rock tends to be stable because of its strong bearing capacity. For the thin-hard thick-soft and thick-hard thin-soft roof, there is no caving phenomenon. If the hard rock continues to become thinner, the roadway span increases or the buried depth increases, it is attention to monitoring and timely reinforcement. Based on the rock structure types of roadway roof which has been excavated and unexcavated in Zhaogu No.1 Mine, the existing supporting forms and supporting parameters can be evaluated and modified, and can ensure the stability of roadway roof during excavation

Due to the high gas emission , In order to solve the problem of the existing wind measures is difficult to control and extraction of measures to reduce the gas quantity problem. This pape ruse t theoretical calculation and numerical simulation to analyze the development regularity of roof mining fissure and found that the width of annular thin coal seam working face roof fissure is smaller and can't make the upper part and the key layer breaking, above makes the key stratum and rock in the enrichment of transfixion crack gas can't development. Therefore extraction project layout should be under the key stratum fissure zone, and according to the analysis of the extraction from engineering design and achieved good application effect.

Abstract: Based on the mining practice of 15106 large mining height and super long isolated island face in Sijiazhuang Coal Mine under complex structural conditions, this paper studies and discusses the relationship between abnormal ground pressure and gas emission in super long working face from the aspects of coal wall, roof caving and unbalanced gas emission. It is considered that the ground pressure appearance in deep and super long isolated island working face presents typical "double peak" distribution, but the old roof in the middle of working face is not the same. The working face weighting is characterized by the coexistence of integral large periodic weighting and regional small periodic weighting. From the point of view of compressive strength and scope, the large periodic weighting is caused by the large-scale instability of the upper hard and thick strata, and the small periodic weighting is caused by the periodic breaking of the basic roof of the working face. During the process, the unbalanced gas emission also shows a periodic state. Each large period weighting is accompanied by gas exceeding the limit, and the duration of periodic weighting is consistent with the increase or decrease of gas exceeding the limit time. This paper analyses the linkage relationship between the mining technology of super-long working face in Sijiazhuang Coal Mine and the wall, unbalanced gas emission and large area roof instability, so as to return to the site safely. The mining has guiding significance.

Gas concentration is one of the main indicators to measure the quality of gas drainage, and the leakage in boreholes sealing section is the main reason to reduce the gas concentration. Therefore, in order to analyze the distribution characteristics of the air leakage field in the surrounding of boreholes and to guide the determination of the air leakage location.The air leakage field in the surrounding rock of boreholes was simulated and analyzed by using Fluent software, and the distribution and strength characteristics of the air leakage in surrounding rock under different sealing conditions were obtained.And a fixed point measuring device of methane concentration in the drainage borehole was developed, witch can provide a reliable basis for increasing gas concentration in borehole drainage.The results show that the sealing depth of boreholes and coal wall cracks have obvious control effect on gas leakage in the sealing section of boreholes. And the leakage of gas extraction borehole in the return air channel of GaoHe Energy W4301 is mainly caused by the insufficient sealing depth and length of the borehole and the small spacing between the boreholes.By increasing the sealing depth and length of the borehole, the average concentration of gas extraction in a single hole can be increased by 3-5 times.The results of the study are important for quickly analyzing the characteristics of the holes in the hole, and making the appropriate increase in the production of the gas.

Prediction of blasting effect of rock roadway in the coal mine is of great significance for rational optimization of blasting parameters and improvement of blasting efficiency. Aiming at the key technical problems such as many factors affecting the blasting effect of rock roadway in the coal mine, which are difficult to accurately predict the blasting effect, a prediction model of blasting effect based on GA-SVM fusion technology is proposed to realize scientific and reasonable prediction of blasting effect. Firstly, based on a comprehensive analysis and expert scoring method, the key impact indicators affecting the blasting effect of coal mine rock roadway were determined. Secondly, according to typical cases in different mining areas, the sample database of blasting effect prediction was established and the samples were processed. Thirty sets of data were used for training, and the other 12 groups were used for prediction, the prediction accuracy was about 92%. Finally, the prediction model has been applied to practical projects. The predicted results coincided with the actual classification of blasting. The research results can provide a new idea for roadway blasting prediction.

For the belt conveyor driven by motorised pulley, the influence of the drum and its internal components on the movement performance of the conveyor belt is discussed. Based on the integrated experimental platform of conveyor belt’s dynamical behaviors, An experiment of observing the transverse displacement of the conveyor belt under different driven speed by drum motor was designed. The results show that when the rotation speed of the drum motor is low, although the rotation of the drum shell does not cause the belt to resonate, inside the drum, the rotation of the middle transmiting shaft with gears will affect the movement of the conveyor belt, and even under certain speed conditions, result in conveyor belt’s resonance, which reduces the smoothness of the transport process.

Abstract: The basic control traverse related facilities under the mine have been destroyed and can’t be used normally. This has seriously affected the production efficiency of the mining area and the safety of life and property of the personnel. According to the existing data of the mining area and the actual situation of the mining area, three different layout schemes of the underground traverse are designed in order to measure the position of the gyroscope, the number and the length of the traverse. The best feasible scheme can be obtained by analysis and comparison. Finally, it is based on the traverse scheme. A reasonable measurement data processing method is put forward. By this method, the accuracy of the traverse measurement and the reliability of the results can be greatly improved.

The finite element model of flip-flop screen was established by finite element software. The first eight-order vibration shape was obtained by modal analysis. The suitable working frequency of the screen machine was found. The distribution law of each part of the screen machine strain was obtained by the stress analysis. The principal stress and equivalent stress value of the key measuring points were measured by the dynamic stress test system. The results show that the dynamic stress of the screen frame is less than the allowable stress, which reflects the rationality of the structure and provides a reference for the optimization design of the relaxation screen. The results show that the dynamic stress test instrument and the finite element analysis are close to each other, which verifies the reliability of the two methods.

Coal mine production is one of the major economic pillars in China. However, coal mine accidents occur from time to time, causing serious losses to the country and the people. In this paper, the trajectory cross model is proposed to analyze the major and above accidents occurring in coal mines from 2014 to 2016. Trajectory crossover accident pattern indicates that accidents are caused by the unsafe behavior of human beings and the insecurity of objects (equipment, environment) in time and space. Based on this theory, the causes of gas explosion accidents, gas outbursts, flood accidents and roof accidents have been analyzed respectively and measures and recommendations have been proposed from three aspects of people's unsafe behavior, unsafe status of objects, and the intersection of the two trajectories to prevent the occurring of coal mine accidents.

Based on the great efforts made by the State Administration of Coal Mine Safety Supervision to promote the standardization construction of coal mine safety production, this paper introduces the successful experience of establishing a national first-class standardized coal mine safety production in suburban coal mine, and briefly describes the establishment of a standardized coal mine safety team through the implementation of "determining the goal of reaching the mine standards, formulating a professional promotion scheme, implementing the on-site control mechanism, and establishing a standardized coal mine safety production team. Tamping the base of reaching the standard of post "five-level reaching standard scheme," double working mechanism of "safety risk grading management and control, accident hidden danger investigation and management", and "professional assessment, regional team assessment, site assessment" three assessment system, have realized the goal of establishing national first-level safety production standardization mine.