For the problem of risk warning system for mine roof water inrush of shallow seam. In this paper, analyze the borehole data and other geological reports, organize and manage various prediction data which related to mine roof Water inrush. Design two modules include the forecast data management and the roof water damage prediction.Establishing prediction model of multi-factors overlay of mine roof water inrush. Finally, based on MAPGIS6.7 platform，VC++6.0 and SQL Server 2008 Database, implement the prediction system of mine roof water inrush, then using the practical data of a certain coal mine of Shanxi, further prove the practicality and reliability of the system.

Abstract: The technology such as condition monitoring, automatic control and fault diagnosis used in armored face conveyors on longwall coal mine was studied. A monitoring and fault diagnosis system has been developed. The structure and function of the system were briefly described. Based on the pressure and path of the tensioner cylinder mounted on the tail-end of the armored face conveyor, the system achieved the pretensioning, manual control and automatic control function. Combined neural network with data fusion, the paper expounded fault diagnosis procedure. The result of field operation indicates that the system has stable operation. The system can satisfy the demands to monitor and diagnose running state of armored face conveyors and to control tensioning force of chains.

Based on the engineering application, this paper chooses rock consistence coefficient f, impedanee of rock, explosive consumption and the average crack spacing of rock mass as the judging indexes of coal rock explosive mass classification. Using AHP to determine weights of these four indexes. Evaluation the rock mass blasting classification by constructed the objective function though extending the least squares criterion and building grey correlation model. The result of actual engineering application shows that the grading evaluation result conform to the actual situation. And this has a certain reference value for the fast and safe excavation of coal mine roadway.

In order to understand the influence law of the hydrated heat from the concrete shaft liner to the frozen wall temperature field, through temperature monitoring in two representative horizontal layers of mine air return shaft in Xin Zhuang coal mine, analysis the monitoring data can get: the temperature soared of frozen wall inside in two horizontal layers and the highest temperature reached 15.8℃ in monitoring point after the concrete pouring of shaft liner; With the increase of depth, the influence scope increase of concrete hydration heat for the frozen wall, but the time reduced of hold positive temperature; under the action of concrete hydration heat, the melting depth of the frozen wall between 250~600mm; the reduce of concrete hydration heat and a lot of moisture-temperature migration in the action of temperature gradient from melting zone to frozen zone, causing the temperature drops rapidly of the high temperature part in the frozen wall inside. The result can provide reference for similar engineering design and construction.

A scientific and rational mining system is very important to the coal mine construction and production. The SongHe mine in Guizhou has complex geological condition and large hazard. The mine has the danger of coal and gas outburst,spontaneous combustion coal and coal dust explosion,the roof and floor stability of coal seam also complex.Besides, the shallow mine goaf area still threatened by water hazard. To ensure keeping the mine operation stable and normal replacement for long term, mine use of "three guarantees two" approach which uses three sets of roadway systems to ensure that the two mining areas, two mining face (No. 1031,2031) extraction, digging, mining balance. The scientific of the mining system is to ensure the production of coal mine more flexible and reliable, roadway excavation and gas control has more space,more time, and improve mine construction, production safety and ability to resist risks. For other coal mines which has similar conditions with SongHe mine , the research result can provide reference to its design ,construction and production.

When ordinary method changes in freezing method in coal mine construction, antifreeze protection measures must be taken for the forming wall in common construction method. The effective method is the temperature control hole controlling the development of freezing front, but there are no specifications and theoretical supports for the temperature control hole design in protection of the forming wall. With the help of the finite element numerical simulation software-ANSYS, the article has done a preliminary study about design of the temperature control hole in Tashidian air shaft construction, and summarizes the design method.

The deep foundation pit in Wuhan, the surrounding environment condition of which is complex,who’s stability control requirement is very strict. Through the analysis of the conditions of its engineering geology and hydrogeology conditions, the comprehensive economic and technical comparison, finally determine the basement of deep foundation pit of the partial section cantilever piling , part of vertical injection flower tube and shotcreting composite support, the calculation of foundation pit support after the safety factor of each section are greater than 1.15, can guarantee the stability of foundation pit.

Filling mining is the certain way to friendly mining for Resource and environment, This article was under the background of The technology research and practicep on filling mining in xinwen mining area,Systematically summarized the technological process and suitable conditions of filling mining on, Under A variety of stope conditions and mining technology, provided valuable experience to reference for green mining in mining enterprises, especially the mining under water body,building and rail,and on karst water body in eastern old coal mining areas

Abstract: Theoretical analysis and engineering exploration are adopted to study the relationship of roof water-gushing and roof movement law. The results show that stope roof breaking movement has spread to the upper aquifer, the gush source in the working face mainly was gritstone fractrure water; Emission of water from sandstone roof has a periodic fluctuation law and a good consistency with the roof rupture instability with the face-advancing, fracture of roof caused overlying strata water flow and mutation, in addition, emission of water also relate to water abundance of the roof. According to the water abundance and buckling and breaking rules of the roof, water gush of the roof can be predicted and controlled.

Abstract:Using sensitised emulsion explosive technique in JianGou hard top coal imply Middle-long hole blasting and weakening of top coal. The results show site sensitised emulsion explosive technique achieving good results in JianGou coal, we monitor to top coal fractured and the roof、the floor and the two sides deformation monitoring, then description of the blasting process and selecting of blasting parameters.

To grasp the influence on the surface after coal mined out. In this paper, using 5310 large cutting height workface in Chengzhuang Coal Mine of the Jincheng Coal Group as an example, surface move observation stations were built and then the surface strata movement data was collected and analyzed. The surface subsidence curve, surface subsidence influence scope and key parameters of surface movement were obtained. Results show that, after large cutting height workface mined out, surface movement and deformation value is greater, surface subsidence influence scope is wider and influence scope at the striking bearing is more than 300m.

According to the problem of roadway in high stressed soft rock with large deformation of surrounding rock, serious failure of support structure, in spite of roadway maintenance in No.2 coal mine of Zhaogu, deformation mechanism of roadway in high stressed soft rock is studied with the application of laboratory testing, theoretical analysis and field measurement. The result indicates the surrounding rock is integrated in a short time after roadway excavation. But the mechanical properties of shallow part of surrounding rock is changed. Strength decreases rapidly and surrounding rock deformation increases sharply. Support resistance can inhibit the surrounding rock deformation when it reaches some range. However, plastic zone and deformation can’t be changed when the support resistance exceeds the range. The proposed plan on surrounding rock controlling is fast anchor net spray firstly, reservation deformation in 520mm in advance secondary support which uses U-shape steel. Field application shows that the plan can effectively control the deformation of surrounding rock of roadway in high stressed soft rock.

Based on the actual situation of Jialequan coal mine 9101 working face as the background, using numerical simulation experiment and theoretic calculation to research the the working face roof control of coal mined-out area under .By analysising the different initial supporting force is in the same position and the same initial support force at different locations and different distance analysis, ultimately find out the reasonable working resistance of support for the 4694KN/ frame.

In order to study the effect of igneous intrusion on coal reservoir adsorption properties, Zhuzhuang coalfield and Zhuxianzhuang coalfield was taken as an example, 10 coal samples were carried out these tests include: vitrinite reflectance measurement, coal quality analysis, isothermal adsorption experiment. Analyzed langmuir volume and the distances from coal samples to igneous rocks, and discusses the differences of coal reservoir adsorption capacity. The results show that, the influencing factors of adsorption capacity are different due to the actual situation of magma intrusions, the coal metamorphic in the study area is still the main factor that influence the absorption capacity of coal reservoir; the moisture in coal would lost its influence on upper part of igneous rocks ; there will be difference in coal reservoir adsorption capacity between the upper part above igneous rocks and the lower part beneath igneous rocks, from magmatic rock mass the equal distance, coal reservoir adsorption capacity of the coal seam above igneous rocks is better than the lower.

In order to improve binding capacity between water and dust and the efficiency of dust removal in spray, in this paper, the surface tensions and contact angles of four surfactant solutions, such as SDS, CAB-35, JFCS and BS-12, in different concentrations were tested by using automatic surface tensiometer and video optical contact angle measuring instrument, determining their CMC, which was also the concentration ratio of the four surfactant solutions; By the principle of each two single surfactant’s combination, coal dust settling and up-ward seepage experiments of the six combination solutions were conducted, combined with simulation experiment, determining that the optimum surfactant agent used for dedusting was the combination of these two surfactants: CAB-35 and JFCS, in the mass fraction of 0.05%. Meanwhile, it was also applied in fully mechanized heading face of 2th mining area of Xinzhi coal mine, Huozhou Coal Electricity Group, Shanxi Coking Coal Group.

Aiming at the problems of large torque ripple and slow reaction speed , which were exposed in the application process of mining electric locomotive speed control system based on SAM (switch reluctance machine),the paper proposed a new method of Switched Reluctance Drive.The method uses direct torque control to optimize switched reluctance motor torque, with the torque flux double closed loop control to realize direct torque control of Switched Reluctance Drive system. The simulation results show that the system has the advantages of small torque ripple and fast speed response In the process of operation.

A new brake which included a structure reasonable pedal bilateral foundation braking mechanism and a energy recycling positive feedback braking was invented, based on the analysis of the unilateral foundation braking device and the motor reverse braking，to improve the braking performance of mine electric locomotive. This system solves the problems of the eccentric wear of brake-tile and the energy waste of resistance braking, shortens the braking response time effectively, increases the braking force and the braking distance, and improves the braking reliability visibly .In power system operation, in order to reduce energy loss and improve the utilization rate of power supply equipment, the regenerative braking is needed. In practical applications, satisfied results and remarkable economic effects were obtained.

This essay predicts the lithology parameters using seismic attribute, by which to obtain the wave impedance body, the apparent resistivity body and the porosity of body from the inversion of velocity, density, resistivity and porosity of longitudinal wave selectively using multi-attribute linear regression and probabilistic neural network technology. In the pragmatic examples, it is consistent to the knowledge of rock physics that to predict the area with comparatively higher aquosity and meanwhile in line with the aquifer defined by the theory of the mining geological. It’s no doubt significant for the prevention of coal mine water inrush accident by the analysis of aquosity to the coal seam roof and floor.

Abstract: The coal-bed methane content is an important parameter for evaluating coal-bed methane reservoir. Because the relation between coal-bed methane content and logging parameters is complex, their relativity should be analyzed before mathematical regression model is built. As the correlation coefficient is smaller, composite parameter is composited to improve the Correlation coefficient between content and logging. 6 kinds of logging parameters are optimized. Linear and two polynomial regression equation are built between methane content and log information. Linear and two regression equation are effective after validation to the predictive value.

Abstract: In order to make a high value use of liquefaction residue , The study on co-pyrolysis of lignite and liquefaction residue was done based on different pyrolysis characteristics of lignite and liquefaction residue， effects of different ratios of lignite and liquefaction residue and different pyrolysis temperatures on the composition of the gas will be studied，and analyzes the laws of synergies on gas composition of the pyrolysis process. The results show that at the temperature of 600℃and the ratios of 9:1; 8:2; 7:3; 6:4; 5:5, the co-pyrolysis of lignite and liquefaction residue has a negative synergy effect on precipitate of H2 and CO2，and has a positive synergy effect on precipitate of CH4 and CO，ratios of 7:3 and 6:4 has a positive synergy effect on precipitate of CmHn, while other ratios are negative synergy effects, the maximum synergy effect comes at the ratio of 7:3~8:2. At the ratio of 7.5:2.5 and the temperature of 500℃~ 800℃ , the co-pyrolysis of lignite and liquefaction residue has a negative synergy effect on precipitate of H2 、CO2 and CmHn，and has a positive synergy effect on precipitate of CO , temperature of 500℃~700℃ has a positive synergy effect on precipitate of CH4, while 750℃~800℃ has a negative synergy effect on precipitate of CH4. the maximum synergy effect comes at the temperature of 550℃~600℃.

Coal fire disaster would have a serious negative impact on the natural landscape, ecology and the environment. Land cover change could evaluate the damages to the surrounding environment caused by coal fire disaster. Accurate results from land cover classification is the basis of ecological changes in coalfield fire area. This paper studied the method of land cover classification of Wuda coalfield using Landsat8 data. According to the landform features, surface features and topography features, Wuda coalfield was divided into five sub-regions. Based on the actual situation of different areas, different decision trees were constructed by the NDVI, NDBI, NDWI, altitude, slope, and spectral characteristics. The results showed that the classification method of sub-region decision tress leads to a high overall accuracy up to 87.63% and Kappa Coefficient was 0.86. Compared with the traditional decision tree classification, overall accuracy of our method was increased by 14.75%, and Kappa coefficient was increased by 0.17.

In order to improve the utilization rate of coal gangue and solve the problem of expansive soil when it was used in road construction, coal gangue powder was used to treat expansive soil. Laboratory direct shear test was conducted, 4%, 8%, 12% gangue powder's influence on expansive soil shear strength were analyzed , and the improving mechanism was proved by coal gangue pH value and gangue powder X-ray diffraction (XRD) . The results showed that the mixed with coal gangue can increase the shear strength of expansive soil,while decreased when the content reached to 8%, then increased again, shear strength is mainly composed of cohesion .The improving mechanism is that the soaking pH value in Wuhai coal gangue after 15 days between 3.8 to 5.8 , it was the acidic solution, the water content was decreased,while cohesion was increased,and the diffraction intensity of gangue powder after soaking was decreases,it was proved that there were a series of chemical reactions,precipitation of substances cemented with expansive soil or ion exchange reaction increased cohesion,thereby the shear strength of expansive soil was improved.

Aim at CO exceed the standard of Kailuan mining, collected 22 typical coal samples, study the relationship between H/C, O/C and fa, 2 (R-1) /C.with coal macerals, Relationship between H/C and vitrinite is concave curve, and negatively correlated with vitrinite , a convex curve with minerals; O/C associated with vitrinite positively, negatively correlated with vitrinite and exinite, negatively related, and mineral matter in coal is curve form; fa is a concave curve with vitrinite, was three times curve with vitrinite and with exinite is not obvious, a convex the curve form and coal mineral. Research show: inertinite contribution of coal generation's CO larger, vitrinite adsorbate CO greater , vitrinite content of less than 50%, vitrinite is a greater impact on the coal molecular structure, effect of vitrinite in coal molecular structure of coal molecular structure may occur; the rearrangement, during metamorphism isomerism, with CO seam may at this time.

The importance of conditioning as the start process in fine coal flotation is introduced. New methods and equipment in this area are summarized and reviewed. Some prediction and suggestion are given about the development trend of conditioning technology and equipment. On this basis, it is indicated that the mechanical agitation theory of conditioning, such as high intensity conditioning (HIC), multi-stage conditioning and multispindle conditioning, continues to be further developed and richen; new conditioning methods, such as pressurization, electrochemical and ultrasonic treatment, are constantly introduced; conditioning equipment upgrading is inevitable and some new equipment emerges, but most currently equipment is mechanical agitation type. Before the industrialized application of other new conditioning methods, further theoretical research and demonstration is necessary.

Combining with the current situation of many recessive risks existing in the process of bidding for construction projects, the forming process and the dominant obstacles of recessive risks is analyzed, and the hidden risk performance of bidding stage and stage of opening of bids for construction projects preparation is elaborated and the explicit consequences of recessive risks is demonstrated. Finally puts forward the recessive risks avoidance strategies including four aspects to improve the quality of design drawings, to determine the reasonable bidding control price, to guard against behavior of surround-bidding, accompanying-bidding, forging-bidding, affiliated bidding and to do best recessive risk mitigation and other related works. This will provide the theoretical basis and practical guidance for development organizations to strengthen the project risk management.

610500, China) Abstract: With Code of Valuation with Bill Quantity of Construction Works(GB50500-2008) for further implementation, the process of the tender offer , working drawing budget, and construction budge, etc. can be investigated , and the disputes of the engineering settlement are reduced greatly. But at the same time ,due to there may be unreasonable low bid situation during the use of the process of bidding skills, making it is too large that the compression of the construction unit's profit margins in the construction and implementation, and to bring the potential risks for the eventual realization of the expected benefits to the construction unit . In this paper, the main path are presented to profitability the construction unit in the engineering bill pricing mode from two angles of saving and revenue-generating , that seek maximum profits through effective cost control and sound engineering claims, to promote the healthy development of construction enterprises .

As the cross mining roadway was influenced by the mining activities for many times, and there are some technological difficulties, such as severe roadway deformation and uncontrollability of surrounding rock, the author makes a detailed analysis of factors influencing roadway stability by combining with the engineering practice background of 113(lower)08 transport cross heading in Jining No.2 Coal Mine. According to the actual geological conditions of 113(lower)08 transport crossheading，Piecewise dynamic support was applied into the 113(lower)08 transport cross heading, The roadway supporting method is anchor net and sprayed before exposing coal, anchor net ladder in full seam gateway and Bolt net anchor coupling support when Layer spacing is 10 to 40 meter. The results show that this support effectively prevent roof, floor and two sides from deformation and roadway shape remain intact after crossing mining, guaranteeing the safety of the mine.

in order to solve the traditional line drawing method construction three-centred arch line drawing big workload, poor precision. the author according to the similarity of elliptic with three heart round, using elliptical definition and setting two line of control measures by using only nine data control three heart arch fork excavation contour size(alleys excavation after entering the fork, only add three memory data). up to the three-centred arch construction line drawing quick, convenient and accurate.Make arch tunnel excavation three-centred arch of the contour line efficiency improved dozens of times and three heart arch fork construction of forming quality has been improved.

Based on the 3205 return air roadway of thick seam and large section in Wangpo coal mine of high gas, it analyzes how the high gas and surrounding rock stability of large section coal roadway affect the safe and efficient drifting, and proposes the gas prevention and control measures of synergistic effect between ahead drilling toward the roadway and gas release hole, as well as supporting technology of high pre-stressed and high strength bolt and anchor. Site practical show that the technology effectively put an end to the gas concentration transfinite phenomenon of tunneling face and return current, and guarantee the stability of the surrounding rock, which realize the rapid and safety excavation of high gas coal roadway with large section.

This article discusses the difficult problem of measuring motor parameters,Based on this proposed a "dummy load" in the form of three-phase asynchronous motor test system.This system does not have to drive the actual mechanical load.Only through the static test data and load test.The collected short circuit test phase voltage, phase current and other data.Can analyze the importance of the three-phase asynchronous motor performance parameters by the Analytic circle diagram method and Virtual Instrument Software.Such technical solution not only improves the accuracy and precision of the data processing,but also reduces operator workload.And compared to traditional measurement techniques,the motor running and the cost of the motor test saves a power consumed.Make intelligent measurement and analysis system more "green".

Tens of millions of tons of fully mechanized working face put forward higher requirements of Emulsion pump station , This text systematically designed the high-pressure, large flow emulsion pump station and system, which include six modular: emulsion pump, emulsion tank, auxiliary hydraulic system, automatic matching and concentration detection device, filtration system, pumping station control unit, and take optimum design of emulsion pump station system base on ABAQUS,RecurDyn and AMESIM.