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coal seam gas (CSG) 1

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Research on the Impact of Mining in Steep Seam on Ground Struc ture

Gao Mingzhong,Wang Lieping

Strategic Study of CAE 2007, Volume 9, Issue 11, Pages 142-146

Abstract:

According to the complex geologic condition of deep excavat ion in Huainan, probability-integral method is ewployed to study the for surface displacement due to coal extraction by optimization mining layouts. Correlation parameters about subsidence under thick loose overburden and duplication mining are obtained. The results obtained may provide guidance for the subsidence-administrating. It is valuable of this paper to other coal mines which have similar geological and mining conditions.

Keywords： steep seam surface movement and deformation probability-integral method predictions

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An adaptive sliding mode control technology for weld seam tracking

Jie LIU,Youmin HU,Bo WU,Kaibo ZHOU,Mingfeng GE

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 1, Pages 95-101 doi: 10.1007/s11465-015-0332-3

Abstract:

A novel adaptive sliding mode control algorithm is derived to deal with seam tracking control problem

Keywords： weld seam tracking welding robotic manipulator adaptive control sliding mode control

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A review on transport of coal seam gas and its impact on coalbed methane recovery

Geoff G.X. WANG, Xiaodong ZHANG, Xiaorong WEI, Xuehai FU, Bo JIANG, Yong QIN

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 2, Pages 139-161 doi: 10.1007/s11705-010-0527-4

Abstract: This paper presents a summary review on mass transport of coal seam gas (CSG) in coal associated with

Keywords： mass transport coal seam gas (CSG) coalbed methane (CBM) coal CBM recovery carbon dioxide storage

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Engineering Experiment Research of the Quantity Theoretical Orthogonal Design Optimal Method for the Coal-seam

Qin Shuyu,Qin Weihan

Strategic Study of CAE 2003, Volume 5, Issue 10, Pages 52-55

Abstract:

To apply the orthogonal design to the optimization of the coal-seam injection technical parameters' combination is a better method that realizes the best effect of injection for the coal-seam withthis method, its effect cannot definitely satisfy the injection engineering requirement for the coal-seamFor this reason, in view of the coal-seam with unsteady geological factors and the characteristic that

Keywords： quantity theory technical parameter orthogonal design coal-seam injection experimental study

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Study on Coal Seam Roof Gas Drainage from the Strike of Annular Fracture Areas by the Long Drill Method

Liu Zegong,Yuan Liang,Dai Guanglong,Shi Biming,Lu Ping,Tu Min

Strategic Study of CAE 2004, Volume 6, Issue 5, Pages 32-38

Abstract:

Gas in working faces is mainly produced in the destressing and desorption process of the coal bed, gobs and adjacent strata. The coal beds are too soft to carry out bedding drilling and draw gas effectively. If gob gas suction is adopted in a large area,the project will prove not only extremely difficult,but also fail to draw out gas of high concentration. Therefore, efficient gas suction is technically determined by seeking fracture aisles for gas movement and gas zone of enrichment. In the course of mining and destressing, gas originating from large destressing areas will go through the fracture aisles of the full development areas and gather in annular fracture areas. The similar material experiments in the laboratory, the numerical simulation and the in-situ study are applied in this work in order to find the location of annular fracture areas in overlying formation. The long-drill mehtod for gas suction along the strike of annular fracture areas is adopted. Mining in coal beds with gas of high conentration and low permeability and gas suction can be operatod separately. During mining activities in the working faces,gas released from roof fracture areas will not flow into upper corners, so the technically drilling problem in soft coal beds with low permeability and high concentration gas can be solved. The application of this technology in the working faces of the gassy mines in Huainan shows that gas suction rate is above 60 percent, making it possible to mine safely,efficiently and intensively.

Keywords： coal seam similar material experiment numerical simulation gas drainage annular fracture area

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Full-mechanized caving mining technology of extremely thick and hard coal-seam with hard roof in shallow

Zhang Zhongwen,Wu Jinan

Strategic Study of CAE 2011, Volume 13, Issue 11, Pages 107-112

Abstract: degree and rational mining method were analyzed by theoretical method on the basis of the 4th coal-seamratio would be realized by lengthening mining face and adding mining height in shallow buried hard coal-seam

Keywords： shallow buried depth hard coal-seam with hard roof top-coal caving difficulty degree full-mechanized

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Offline motion planning and simulation of two-robot welding coordination

Tie ZHANG, Fan OUYANG

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 1, Pages 81-92 doi: 10.1007/s11465-012-0309-4

Abstract:

This paper focuses on the two-robot welding coordination of complex curve seam which means one robotMoreover, downhand welding is employed which can guarantee the torch and the seam keep in good contact

Keywords： complex curve seam two robots coordinated welding motion planning

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Key Technical Issues of TGP Permanent Shiplock

Fan Qixiang

Strategic Study of CAE 2004, Volume 6, Issue 1, Pages 48-52

Abstract: structures, sedimentation hindering to navigation, hydraulics of the water-conveyance system, high and steep

Keywords： navigation structures water-conveyance system high and steep slope hydraulics

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Safety analysis and control of mine-blasting-field adjacent infrastructure

Shi Fuqiang

Strategic Study of CAE 2014, Volume 16, Issue 11, Pages 86-89

Abstract:

With mine-field blasting examples meeting the needs of protected object safety demonstration for a long time, systematically analyze the impact of blasting vibration to bridges, tunnels and slopes, etc., also the mechanical relationships between each other. Using of risk analysis principles put forward safety demonstrating method and hazardous factors controlling technique, and establish the common procedure of blasting parameters zoning control to realize a standardized process control system. The technology has been gradually improved after several applications.

Keywords： mine blasting safety demonstration bridges tunnels high-steep slopes

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Research on key technology of thin seam plough complete equipment

Song Qiushuang

Strategic Study of CAE 2011, Volume 13, Issue 11, Pages 33-38

Abstract:

According to the worldwide problem of thin-seam security and economicexploitation, this paper analyzes the thin-seam mine resource distribution and the present situation

Keywords： complete plant of plough directional and quantitative pushing heterogeneous geological selfadaptation control

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Discussion on the Content of Coal Bed Gas Predicted by Indirect Method

Xian Xuefu,Gu Min

Strategic Study of CAE 2006, Volume 8, Issue 8, Pages 15-22

Abstract: adsorption isotherm models for coal bed gas and their relationships, the free methane state in coal seam

Keywords： indirect method gas in coal seam methane methane adsorbed free methane

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on elevation of coalbed methane recovery ratio by injecting and burying CO₂ for 3# coal seam

Ye Jianping,Zhang Bing,Sam Wong

Strategic Study of CAE 2012, Volume 14, Issue 2, Pages 38-44

Abstract: Under pressure lower than rupturing pressure for coal seam, 20 of CO2 can be injected smoothly dailyAfter injection of CO2, the coal rock swells and the local coal seam get less penetration ratio, whichhydrocarbon gas reaches 14.18 cm3/g within the scope influenced by CO2 injection in the target coal seam

Keywords： Qingshui Basin Shanxi CO₂ injection coalbed methane recovery ratio

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Coal seam roof and floor hydrogeology conditions evaluation of Pingshuo No.1 mine and measures of preventing

Zhang Zhongwen,Wu Qiang,Fu Enjun,Fan Zhenli

Strategic Study of CAE 2011, Volume 13, Issue 11, Pages 94-101

Abstract:

Aiming at water hazards menace of Pingshuo No.1 coal mine roof and floor, the paper ascertains relevant factors of coal mine water bursting on the base of analyzing the mining and geology conditions, and evaluates the roof hydrogeology conditions and floor water bursting vulnerability. At last,it sets down a series of measures of preventing water hazards.

Keywords： three maps method vulnerability index method water hazards of coal mine prevented measures of water hazards