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Study on Protective Seam Mining and Roadway Arrangement for Coal Seams with High Gas

Author: XiaoTongQiang
Tutor: FanKeGong
School: Shandong University of Science and Technology
Course: Mining engineering
Keywords: Gassy coal seams Protective layer mining Relief evolution Roadway layout
CLC: TD822.2
Type: Master's thesis
Year: 2008
Downloads: 137
Quote: 0
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Abstract


Mining for coal mine safety ear hair issues , Through theoretical analysis, numerical simulation methods such as high gas outburst coal seams protective layer mining and roadway layout system was studied. Theoretical analysis method to analyze the movement of overburden , a clear protective layer mining protection mechanism: protective layer mining relief effect and protective effect is the result of gas extraction , but relief is the primary , decisive the role ; based Fa'er mine coal seam conditions , proposed two protective layer mining plan, and using FLAC 3D numerical simulation results of the program carried out relief compared ; basis of upward mining engineering practice experience and the use of numerical simulation method under conditions close spacing protective layer mining feasibility demonstration, to determine a reasonable solution ; numerical simulation method was carried out on the selected program relief protective layer evolution studies to determine scope of the relief , and the prediction of gas emission laws were revealed in the distance seam group activities under rocks and gas pressure , gas flow rate to each other. In roadway layout system, the proposed gas at high distance seam group roadway layout system under the conditions of the basic idea of preparing a joint approach roadway interlayer contact information, stoping the process of ventilation , gas drainage methods and other issues the analysis ; and according to the law of abutment pressure on the tunnel leaving in manner and location selection, mining succeed relations and other issues were studied. Through the study of these issues , the protective layer and close coal mine tunnel layout group has received a number of useful conclusions for the safe mining of gassy coal seams provides an important safeguard , under similar conditions for the exploitation of great significance.

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CLC: > Industrial Technology > Mining Engineering > Mining > Coal mining > Coal mining design > Open layout and roadway layout
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