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The Study on Regional Outburst Prevention Technique with Progressive Protection of Gob-side Entry Retaining of Current Seam
Author: CuiWan
Tutor: ShiZongBao
School: Henan Polytechnic University
Course: Mining engineering
Keywords: The Seam Gas Drainage Along goaf Coal seam permeability Sealing depth Extraction rate
CLC: TD713
Type: Master's thesis
Year: 2011
Downloads: 79
Quote: 0
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Abstract
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In this paper , the single the seam extraction , pre-pumping borehole drilling along the area of the section of the coal seam gas outburst prevention measures based on proposed outburst prevention technologies along goaf drainage Progressive protected area to avoid deformation and failure of roadway drainage the original drainage pipe to ensure a reasonable pre - pumping period , improve pre- pumping rate while long drilling drainage while protecting the lower section of roadway, improve Excavating . In this paper, the occurrence of coal seam gas flow law as the basis for analysis of the gas pressure , the seam permeability variation , drilling parameters and drainage suction gas drainage ; along goaf by numerical simulation stability , along goaf mine pressure distribution and the relationship of the sealing position of the stress distribution and failure characteristics under different conditions of coal near the wall , put forward the the secondary sealing necessity along goaf ; utilize FLUENT on gas drainage caused by drilling and coal changes around the computer simulation illustrates the impact of different parameters on the distribution of gas pressure field and flow field , a reasonable extraction parameters ; along the left not to verify the final scene by Jiulishan engineering applications the Alley progressive the protected area drainage effect of regional consumer sudden .
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CLC: > Industrial Technology > Mining Engineering > Mine safety and labor protection > Mine atmosphere > Coal (rock) and gas outburst prevention and treatment
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