In the paper, the overall concept of ecological planning in mining cities and the resources integrated utilization in ecological construction were discussed around the city ecological construction and comprehensive utilization of subsidence area in coal mining. New mining cities landscape ecology, suitable for living were created by building " a green heart, two lungs, multi-park and multi-corridor" spatial ecological landscape network in Huaibei City, leading the change of the concept of urban ecological construction from "building gardens by depending mountains" to "building lake in city, building gardens around water ", and from "back to lake" to "oriented to lake, embrace lake" providing the successful samples and the important technical support in order to promote the ecological construction and green development transformation in mining cities, enhance ecological system quality and stability, and build a beautiful and livable garden city.

Abstract:In order to solve the problem of "three difficulties and one low" in the process of gas drainage in 3 # coal seam of 1307 working face in Zhaozhuang Coal Mine, which is hard to drill, difficult to make holes, difficult to pre-drainage and with a low concentration. Using the "three-down-two-up" of the gas control method, can easily lead to slow slow driving progressang serious imbalance between mining and excavation. By FLAC3D numerical simulation,Respectively analyzed from the stress and displacement of different high drainage roadway placement horizon.concluded the optimal placement horizon of high drainage roadway.Therefore, the "U-type ventilation + high drainage roadway" gas control method was adopted.This paper analyzed the extraction effect of the high drainage roadway in different mining stages from the aspects of the placement horizon, pure quantity of drainage, extraction negative pressure and the extraction concentration. The results show that, when the distance between the high drainage roadway and the roof of 1307 working face is 43m~51m, the gas drainage is the best, and the corresponding extraction negative pressure is 12~15KPa, which effectively reduces the gas concentration in the upper corner of working face. The research results can be used as reference for the coal mines of the Jincheng AnthraciteMing Group and other mines at home and abroad.

This paper introduces the causes of the explosion of the explosion - proof motor of EML340 continuous miner, and analyzes the characteristics of various cooling modes of the motor. Deduced the calculation formula of the heat and the temperature rise of the motor, and calculated the calculation formula of the water cooling system. The calculation formula of the total cooling water flow rate, the actual temperature rise and the cooling water flow rate is given. The motor of the cutting mechanism is taken as an example.

Aiming at the Pucheng chemical coal handling system in the original design of the two systems is not flexible enough, broken station without bypass system, single engineering more, there are disadvantages of the fork chute and dust system is more backward and other issues, Detailed design of which were analyzed and optimized, Optimized after the two-way system more flexible; broken station to increase the bypass system, the system more energy efficient and reliable; the use of joint construction, to meet the use of functional and investment province; sub-chute at the gate instead of the flap, to avoid the leakage material, ; Dust removal system using dry mist dust instead of bag dust, dust removal effect is more significant. Production practice shows that: the above optimization of chemical coal handling system is reasonable and feasible, it is worth learning from.

In order to reduce the Hei daigou ditch open-pit coal mine rock loose blasting explosive unit consumption, improve the blasting quality, increase economic benefits open-pit coal mine, according to the actual circumstance of Hei daigou ditch open-pit coal mine blasting operation and development of blasting technology, make deep hole bench blasting used advanced technology has the possibility to fulfill the project. Hei daigou ditch open-pit coal mine by adjusting the hole density coefficient, reduce gun kong pays deep, instead of piecewise continuous charging structure charging structure, adjacent BaoQu obtuse Angle instead of rectangular cohesion and other technical measures, the blasting parameters to adjust. Through the test verifies the feasibility of the adjusted blasting parameters, and through the practice proves that the optimized blasting parameters make specific charge is reduced by 17.6%, average annual cost saving explosive the advantages of more than 1000 ten thousand yuan. Finally established suitable for deep hole loose blasting optimization parameters.

According to the problem of the significant influence of dynamic pressure to the gob-side entry retaining formed by roof cutting and pressure relief for a certain period, the basic idea of controlling the deformation of roof by temporary support technology for dynamic pressure bearing was proposed. Based on theoretical calculation and analysis, the action mechanism of temporary support technology for dynamic pressure bearing was discussed. It was concluded that the temporary support had limited effect on the "given deformation" of the upper roof but was very effective in controlling the deformation or separation of the lower roof. The mechanism of temporary support for dynamic pressure bearing was simulated and analyzed by finite difference simulation software FLAC3D. And the following rules were obtained: 1) It was effective to control the deformation of the roof by using temporary support in the gob-side and the middle of the roadway at the same time. 2) The greater the support strength, the better the deformation control effect of the roof. But there was a reasonable range. Within the range, deformation could be easier effected by support strength. While greater or less than the range, the impact imposed by the change of the support strength on deformation would be significantly reduced. 3) If the temporary support was withdrawn before the roof contact with waste rock, the final subsidence amount of the roof was generally large. And the final subsidence amount of the roof would be generally smaller while the temporary support was withdrawn after the roof contact with waste rock. Based on the above analysis, the design idea of temporary support technology for dynamic pressure bearing was proposed and had been successfully applied in the Ningtiaota coal mine. Test data show that the deformation of the roof was generally less than 89mm, and the control effect of the roof was good under the action of the temporary support technology for dynamic pressure.

Based on the law of overlying strata movement in working face and masonry beam balance theory, analyzes the overlying key strata roof block sinking motion characteristics of gob side entry under working face with large mining height and support of small coal pillar,and the mechanical equilibrium structure formed by the mutual extrusion of blocks and damage to surrounding rock of gob side entry.Discussed the failure characteristics of surrounding rock on gob side entry and engineering supporting performance under large mining height.The results show that a stable semi arch mechanical equilibrium structure is formed in the key fault blocks above gob side entry during the mining of adjacent working faces,this structure plays a reliable protecting role in the surrounding rock of roadway below it,during roadway excavation and the mining of the current working face.So,the support for surrounding rock of gob side entry should be carried out around the semi arch mechanical equilibrium structure.Put forward different parts for the surrounding rock of gob side entry should adopt different support mechanism and parameter,and experiments have been carried out in the coal mine to ensure the safe use of the roadway and achieve better economic results in 5312 working face of Jining No.3 coal Mine.

Due to the serious fracture zone of the fractured zone, there are a lot of accidents in coal mine roadway in the process of tunneling. In order to ensure the stability of surrounding rock and roof safety during the construction and use of roadways, combining with roadway roof caving accident situation of NuanQuan coal mine 10101 working face , analyzes the fault fracture zone of roof caving range, and the targeted treatment scheme. In order to solve the problem of broken collapse, filling fractured area by grouting with high water material were put forward, the roof area of broken rock and rock around the bond as a whole, to restore its carrying capacity; In order to solve the excavation and use of process safety, pipe roof advance combination U type steel roof support technology were put forward strengthening roof fall section and collective functions. After the project,the work surface is monitored, no two roof fall accident, verify the rationality of the reinforcement method.

According to the continued deformation problems of track roadway with broken surrounding rock under the high geostress conditions under 13-1 coal seam in Guqiao Coal mine. Based on site survey, the failure characteristics and the internal structure of surrounding rock were analyzed. Pre-stressed bolting and grouting technology based on bolt and anchor support was provided to repair roadway in this paper. Field experiment shows that the support scheme was effectively to prevent roadway deformation, and good supporting effect was achieved in application.

It is an important innovation to control the water damage of the coal seam floor by using the mine prevention and control technology combined with the ground L-shaped directional drilling technology and the ground grouting technology, which is based on the drilling and measuring simultaneous orientation techniques. And the system research of directional drilling technology, drilling equipment, drilling structure design and hole making process, formed a complete set of technology. This technology has achieved good construction effect in the grouting reinforcement project of L8 limestone aquifer in the 1801 working face of Zhaogu Coal Mine, which not only enrich and perfect the water damage prevention technology of coal seam floor, but also realize the large area coal seam floor advanced grouting reform, the safe and efficient mining of large mining deep coal mine high pressure coal seam is of great significance.

In order to solve the problem of serious deformation of roadway driving along goaf in Jiulishan coal Mine according to very tense mining-excavation replacement, the engineering technology of deep borehole blasting for roof cutting and pressure relief is applied in haulage gateway of No. 15071 mining face. Based on the methods of theoretical analysis, field experiment and mine pressure observation, deep borehole blasting for roof cutting and pressure relief can control serious deformation of roadway driving along goaf is founded out, and the parameters and process of blasting and bursting charge are researched. The conclusions show that deep borehole blasting for roof cutting in haulage gateway of No. 15071 mining face has played a good pressure relief role to the roadway driving along goaf in No. 15091 mining face, and the roadway confining pressure has decreased, and serious deformation of roadway has been effectively controlled, and roadway support quality has been improved compared to roadway without roof cutting.

Abstract: With the development of today’s modern mine construction, large box-shaped steel derrick is widely used. In order to realize the combination of the derrick assembly technology and the modern mine construction, in order to obtain the improvement of the large box-shaped derrick assembly technology and safety technology, also to speed up the construction period of the box-shaped derrick, reduce the cost and the labor intensity, which can make the assembly meet the safety demand and rationality requirements. This paper introduces that our company has adopted this technology of the box crane derrick construction successfully, which is mature, safe and reliable. Not only is this technology in good quality, but it also is in a economical price. It is hoped to help to promote the technology of box-shaped derrick assembly and the construction of box crane derrick.

For a high gas coal mine caving in goaf coal spontaneous combustion, with N2202 working face as the engineering background, through field investigation, laboratory test, numerical simulation and industrial experiments and other means of goaf gas injection CO2 prevention of goaf spontaneous combustion ignition and improve the efficiency of gas extraction study. The research shows that different particle size of coal sample showed the adsorption of CO2 gas is higher than that of CH4 gas, and the particle size of coal sample under the condition of mixed CO2 gas injection can effectively exchange adsorption of CH4 gas; Fluent numerical simulation indicates that the mined out area on the CO2 gas injection makes the CH4 gas concentration gradient distribution in gob deep mobile, and can effectively dilute the gob gas accumulation with gas concentration; CO2 gas injection makes the goaf oxidation zone decreases, while resulting in part of the CH4 gas adsorption on coal is replaced, the gas drainage concentration from the original average concentration increased to 49.25% in 35.61%. The empty time zone of spontaneous combustion can effectively improve the level of branch wells of goaf gas drainage efficiency control. The research results provide some reference for the coal mine with high gas and spontaneous combustion.

Abstract: For the treatment of thick coal seam with large mining height fully mechanized caving face gas "far field", in Tashan mine 8214 working face as the research background, the use of "O" ring theory, analysis the study found that gas flow characteristics in the goaf overburden fissures in the ground, "L" type hole end the horizon is located in the "far field" gas enrichment zone, therefore, by using the "L" type drainage technology governance "far field gas, comparative analysis of the implementation of the" L "type ground drainage" far field gas before and after the studies show that the variation of gas concentration, the roof roadway, implementation the "L" type after drilling, the gas concentration of the roof roadway is significantly reduced, and the gas concentration of roof roadway tends to be gentle, modest, remained at about 2.5%, therefore, the ground of "L" type drilling well shared roof roadway drainage Mining pressure to ensure the safe production of coal mine.

In order to formulate water disaster prevention and control project for tunnel drivage and workingface mining, through the dewatering test of Ⅱ aquifer and Ⅲ aquifer on the roof, the hydrogeology parameters of each aquifer were calculated based on analytical method. Combined with observation data of dewatering test, the hydraulic connection between Ⅱ aquifer and Ⅲ aquifer was ascertain, and the drainage feasibility of each aquifer was evaluated. The results show that permeability and water-bearing of Ⅲ aquifer were good, and there is a close hydraulic connection between Ⅱ aquifer and Ⅲ aquifer . The drainage fesibility of Ⅲ aquifer is poor during tunnel drivage, the grouting transformation of roof aquifer and local drainage groundwater can be used to prevent and control water disaster. Compared with the pumping test, the permeability coefficient of Ⅱaquifer is bigger based on dewatering test, this result is mainly due to the drilling process, the influence of hydraulic jump and well loss. Long time dispersing drainage and short time concentrated drainage can be used before working face mining. In the case of multi-aquifer on the roof of coal seam, dewatering test can be used to explorate the condition of water disaster of working face, then, drainage feasibility was evaluated, and corresponding water disaster prevention method was formulated.

In order to solve the hidden problems of coal mine water hazard detection and governance problems,to solve the conventional drilling construction distance is short, difficult to drill into the detection layer and other issues, based on the coal mine underground screw motor combined with drilling measurement system directional drilling technology, a set of coal mine water hazard exploration and treatment of precision directional drilling construction technology is introduced, by optimizing the borehole design, the trajectory precise control technology, the construction trajectory is precisely controllable for long distance orientation to detect the water hole. The results show that it is possible to save a lot of cost and improve the efficiency of the working face with the risk of water burst, for the detection of rich water, it can be effectively drilled into the design level, to solve the problem of coal mine water detection, coal mine safety production to provide technical support.

The article aimed at the problem of unbalanced tension in the double chain of scraper conveyor, “Deviation of intervention” (Workers on-site grinding to change the pitch of chain link)is used to adjust it at Shenhua Shendong mining area at present. designed and applied of the variable pitch connect link to adjust the chain tension, which can be simple, efficient guarantee safe and reliable operation of the scraper conveyor,an effective way of a short time, low cost, greatly educe workers labor to similar troubleshooting is found for the future.

Coal petrology and properties, depth, thickness, properties, temperature and pressure, hydrocarbon content and isothermal adsorption properties characteristics of 15# coal bed in Qiyuan first coal mining area were analysed. Thickness of 15# coal bed is stable, average is 3.37m. Buried depth is moderate, average is 730m. Coal petrology is given priority to half light type, thermal evolution degree is higher, vitrinite reflectance is 2.5%~3.15%, the range of CBM content is 4.02m3/t to 17.13m3/t, average is 13.50m3/t. These conditions are conducive to development of CBM of the 15# coal。But the average porosity is 5.85%, the average permeability is 0.43mD, belongs to low porosity low permeability reservoir. These conditions are not conducive to development. According to the geological characteristics of 8 groups of u-shaped horizontal well, the key factors impacting production of the CBM is quantitative production system with accurate control of the pressure drop. The results show that the pressure drop rate of pre-desorption time is 3.8~7.7times of after desorption time, the pressure drop rate of pre-desorption time is 8.8~10.5kPa/d, the pressure drop rate of after desorption time is 1.9~2.5kPa/d.

Aiming at the high stress and the large deformation of the surrounding rock caused by the dynamic pressure of the open coal mining in the Tashan coal mine,analyzing the principle of unloading pressure and preset parameters.The principle of unloading and presetting parameters are analyzed,and then based on the dynamic evolution of the surrounding rock stress in the process of coal mining,the stress changes of the surrounding rock in the process of mining are analyzed in the cases of if there were any relieving roadway by using RFPA simulation software.The results show that the reasonable width between the pressure relief roadway and the coal pillar is 15m;during the mining process, the shear stress of the roadway surrounding rock reaches the maximum value when the working surface is pushed 180m,and shear deformation occurred within 6 m of the working face due to plastic deformation;by digging relieving roadway,the maximum pressure of the coal pillar is reduced by 22.6%, the maximum shear stress is reduced by nearly 50%,the surrounding rock stress of the crossheading and the shear stress of the roof and floor are also reduced in different degrees.The results provide a reference for the layout of the relieving roadway in the thick coal seam.

Taking the middle six entry excavating across the F2 faults in Renlou Mine as the background and using FLAC3D finite difference program, this paper has studied the distribution law of stress field under fault structure and deformation characteristics of roadway in different position. Roof was focused on footwall, and ribs were focused on hanging wall, and counter-arched floor was used, which were presented as a support method. The results showed that obvious vertical stress-concentrated areas exist near F2 fault zones. The influence of fault structure on the roadway is 10~20 m and the reinforced supporting range is 60 m around F2 fault zones. Surrounding rock deformation of the entry above F2 fault is larger than the one below it and two faults do not affect each other under the current geological conditions.

According to problems of 3203 auxiliary transport roadway surrounding rock stability and supporting in Tala Hao mine. Through field measurement and numerical simulation, deformation and failure characteristics and mechanism of the auxiliary transport roadway surrounding rock was analysed. The results show that the roadway surrounding rock deformation and failure began to appear behind the working face, as the working face moved forward, the degree of destruction become larger, when the 300m~400m was promoted in the working face, the surrounding rock of the roadway tended to be stable. In order to prevent the occurrence of accidents, according to the plastic damage law of auxiliary transport roadway roof, the reinforcement measures for roof classification were put forward, reasonable support measures were chosen such as adding anchor and shed supporting to ensure the safety of roadway.

Abstract:In order to better solve the coalmine advanced water forecast problems,Based on the problems of coal roadway leading water technology research,the paper presents a new coal roadway drilling induced polarization advance water forecasting techniques and methods, which overcomes the effects of interference factors in roadway,and remote detection in heading face evolved into a borehole close observation detection by borehole observation detection.At the same time, systematical analysis of the theory and the analysis methods of the technology.After a space simulation test and test, detection and analysis on coal mine, summing up a set of coal roadway drilling induced polarization analysis technology of advanced water forecasting.

In order to study the law of surface subsidence for fully-mechanized top coal caving under thick nnconsolidated layers , on the basis of the surface movement observation data of P1501 working face in Poxi coal mine,the effects of fully-mechanized top coal caving on the parameters of surface movement and deformation and dynamic parameters are studied under the condition of thick unconsolidated layers. It was concluded that, compared to general mining geological conditions, the surface subsidence coefficient and horizontal movement coefficient caused by fully mechanized caving mining are more larger under the thick unconsolidated layers, is 0.88 and 0.69 respectively, while the main influence angle tangent, the mining influence propagation angle and the inflection offset are smaller, is 1.71、54.2°and -0.03H0～0.11H0 respectively; The initial period of surface movement is relatively short, and the ratio of total surface movement time is only 9.6%, while the active phase is longer, and the ratio of the total moving time is 50.6%, the ratio of the stage subsidence to the total subsidence is 97.3%.

Provide the stacking process of the stacker, and study the time budget during the operating, determine the slewing speed, and provide the meticulous selection for the slew bearing, and also analyze the design principle of the stacker luffing.Provide the reclaiming process of the reclaimer, analyze the matching relationship among the slewing speed ,the scraper operating speed and luffing speed of the reclaimer,determine the matching design principle. Provide the project application. The idea and method of the study can guide the design, and also provide the theoretical reference for the research of the meticulous design for the circular stacker and reclaimer.

Abstract: In order to make the fault type, the fault reason and the logical relationship among various faults of deep well hoisting wire rope clear and to find out main factors which affected the failure of deep mine hoisting rope.The fault tree model of deep well hoisting rope was established by using fault tree analysis method and analyzed qualitatively and quantitatively in this paper. The reliability simulation model of deep mine hoisting wire rope was established based on matlab software, the reliability and failure probability density curve were obtained. The results show that the torsion of the wire rope was the main reason for the failure of the deep wire rope. The failure of the deep wire rope was mainly occurred in the early stage when the wire rope was put into use.

To deal with problem of complex modeling for FEA process, the parameterized FEA expert system based on intelligent voice interaction was developed. According to the research on parameterization, intelligent voice interaction and reuse, function and flow of expert system were studied. Through voice recognition, expert system and parameterized FEA, qualitative design and quantitative design were combined. Parameters were adjusted automatically in the FEA process . The key technologies of expert system was studied, refer to implementation methods of intelligent voice interaction and parameterization design based on case-based reasoning. Then the paper discusses the improved interoperation technology of VC++ and CLIPS, and come up with a method of improved interoperation technology. An example of structure analysis of middle frame of belt conveyor was given, and implementation method of the parameterized FEA expert system based on intelligent voice interaction was developed. The results show that the software lighten work strength and raise working efficiency. Key words: expert system; iFlytek Input; tree structures of Design and selection; the parameterized FEA

Based on simple introduction of rapid coal loading system workflow and types, the paper divides the research of trapid coal loading system into two aspects: structural design and automatic control. Next, it discussed research status, application status of rapid loading station, silo, chute, hydraulic. Then, it discussed research status, application status of monitoring and control technology. Finally, it pointed out some development tendencies of the rapid coal loading system.

The stability of the old goaf is the key to determine whether the abandoned land resources can be used. Accurate and reliable residual subsidence data is prerequisite for judging the stability of the old goaf. In this paper, the Wuyun expressway construction site is taken as an example, and DS05 level is employed to periodically monitor residual subsidence according to the first order leveling precision requirement. The results show that the accumulated maximum residual subsidence of K30+800~K31+500 is more than 20mm, and its residual subsidence velocity has an obvious characteristic of periodic changes. Residual subsidence of K31+700~K33+000 is smaller than that in K30+800~K31+500, and the accumulated maximum residual subsidence is less than 5mm. Subsidence is also inversely proportional to the depth. The countermeasure for Wuyun expressway construction site is proposed that adding geotextile and geotechnical grille are employed to improve the stability of subgrade. In addition, the flexible material is adopted in pavement to resist the residual subsidence to ensure the security of vehicles running. This work is of general interest to the professional public and it will contribute to a more objective knowledge of residual subsidence for scientific researchers.

Laboratory simulation blasting using simulating materials is a common means of coal blasting test. Based on the study on the physical mechanics properties of coal, the paper summarized the physical mechanics parameters of typical coal (hard coal an medium hard coal). The experiment, by employing 9 groups, 118 pieces of samples which were composed of ordinary building materials, tested the porosity, wave velocity,densityand stress-strain curve respectively after 28 days standard curing. By comparing to the typical properties of coal ,some influence factors and laws of different materials on the properties of simulation coal were summarized and two kinds of material combinations and its mixing ratio were confirmed to simulate hard coal and medium hard coal respectively. This research findings could be applied to the further study on blasting fracture mechanism and gas desorption law in coal.

In order to investigate the pyrolysis characteristics and the distribution of gas phase product of lignite, pyrolysis experiments at different heating rates were carried out with a thermogravimetric mass spectrometry (TG-MS), and the weight loss of coal samples at different heating rates, the change of release process of CO and H2, and the calorific value of the pyrolysis gas and the cold gas efficiency were explored and calculated. Research results show that the release rate of water vapor at different heating rates is equal, which is not related to the pyrolysis heating rate. The mass of coal sample decreases gradually with the increase of pyrolysis time. At different heating rates, the final residual mass of pyrolysis coal samples is not the same, and the average remaining mass is 6.51mg. When the pyrolysis conversion is small, the activation energy E value is larger, and the pre exponential factor A is higher. With the increasing of the pyrolysis conversion rate, the activation energy decreased, which indicates that with the increase of pyrolysis temperature, coal molecular absorption energy to overcome the reaction barrier difference decreases, the pyrolysis rate increases. The release of CO and H2 can be divided into three stages, and the release peak temperature moves to the high temperature with the increase of heating rate. The calorific value of gas product and cold gas efficiency exhibit a wavelike trend.

There are two series of earthquake event deposits in Dachenling formation of early Cambrian in Peilingjiao area, the West of Zhejiang Province. Which caused soft sedimentary deformation, on the first phase of earthquake, deposits are 240m thickness, and deposits are 320cm thickness on the second phase of earthquake. There are about 165cm thickness dolomitic limestone stratum with liquefied veins caused by earthquake on the second layer. The authors collected 14 samples of dolomitic limestone with liquefied veins. For evey sample, the authors analyzed C、O isotopic in vein material and surrounding rock（dolomitic limestone）respectively. The carbon isotopes(δ13CPDB-v) values of veins material, from -0.07 to -1.51‰. and theδ13CPDB-d values of dolomitic limestone of surrounding rock rang from +0.01 to-1.09‰. The test data belongs to normal marine carbonate rocks. But all of the test result shows that δ13CPDB-d＞δ13CPDB-v. It is because water-escape structure create isotope fractionation by earthquake , the later alteration and 12C prior to 13C remove from deposits during sluicing. Seismic action can cause the value of 13C occur negative drifts. The δ18OPDB-d value varies from -13.47 to -18.56‰ in the veins material and surrounding rock（dolomitic limestone）, and the δ18OPDB-d value varies from -12.65 to -18.09‰. That is because water-escape structure is a weak structure plane, easier to be influenced by atmospheric precipitation, and later hydrothermal alteration.

Aiming at the complexity of current monitoring system of hydraulic support cable wiring, and the defects of ZigBee wireless technology short transmission distance, low penetrability and high packet loss rate, a hybrid network hydraulic support pressure monitoring system based on ZigBee+WiFi is designed. The sensor nodes of the system use the ZigBee protocol to send data, and then pass the ZigBee to the WiFi gateway to send data to the host computer by WiFi protocol, and the pressure data is finally monitored and saved through the host computer. Tested, the ZigBee+WiFi hybrid network can control the packet loss rate below 5%, and the transmission distance can be extended to 300 meters, which provides a reliable and effective solution for monitoring the pressure of the downhole hydraulic support.

Telescopic boom is the main component of the working device of mine operation vehicle, and its design directly influences the working performance of the working vehicle. With the minimum mass of the hanging arm as the optimization objective, the mathematical model of the boom optimization is established under the constraints of strength and stiffness, in the finite element software ANSYS Workbench, the parametric model of the boom structure of the work vehicle is established, and the response surface and sensitivity analysis of the design parameters are carried out, combined with multi-objective genetic algorithm, multi-objective optimization design of boom section parameters is carried out, and the optimal section form is obtained. The results show that the maximum stress, the maximum deformation and the quality of the optimized boom are reduced, on the basis of improving the comprehensive performance of the boom, the purpose of reducing the weight of the boom is achieved, which provides a train of thought and reference for the design and optimization of the boom structure of the mine operation vehicle.

The swinging angle of broken hammer in existing flding mechanisms is greater than 5 degrees, the work efficiency and service life of the broken hammer are seriously affected. In response to this problem, using the three special positions of the broken hammer, A new kind of broken hammer flding mechanisms is designed by using the drawing method. The mechanism can extend or retract the broken hammer in a straight line.The measures for adjusting the length of the rod-Ⅰand rod-Ⅱ are given. Take a type of broken hammer as an example, the broken hammer flding mechanisms is designed by the design approach is described in this article. In the post-200mm travel, angle variation of drill rod is 0.24 degrees, the maximum displacementthe of the top point of drill rod is 3.61mm along the radial direction of the drill rod, these indicators are meet the requirement of the broken hammer.

Abstract：In order to solve the problem of the short life of the Ream bit while secondary reaming in underground coal mine well ,this paper analyzes the cutting principle of PDC reaming bits, PDC reaming drill for the retrofit design, the field tests show that the modified Ream Bit has a single life of 800 meters above, which can be used in Directional high level borehole.

Ecological environment monitoring and management information system is important to improve the level of coal mine ecological environment management. According to the requirement of coal mine area ecological environment monitoring information system, a ecological environment monitoring and management information system of coal mine area based on WEB-GIS is developed, using universal B/S structure. the system, which is composed of basic GIS subsystem, remote sensing monitoring subsystem, video monitoring subsystem, ecology, irrigation water quality and soil erosion monitoring subsystem, data management subsystem, user management subsystem, can achieve management of multi-source and massive spatial information data and provide data service. Using the system, the ecological environment monitor and engineering data can be stored, queried, analyzed and visualized. The system has successfully applied to ecological environment data management of Shendong coal mine area, and can provide management and visualization of co-environmental data, which shows it is feasible. Based on the above, The suggestion of future ecological management in Shendong coal mining area is provided.