Dissertation
Dissertation > Industrial Technology > Mining Engineering > Mine safety and labor protection > Mine atmosphere > Mine Gas

Research on Overlying Rock-Coal Failure and Deformation Caused by Mining Protecting Strata, and Relieved Methane Drainage

Author LiuBaoAn
Tutor TuMin
School Anhui University of Technology
Course Mining engineering
Keywords Under the protection layer mining Gas drainage Rock and coal Fracture distribution Relief effect
CLC TD712
Type Master's thesis
Year 2006
Downloads 711
Quotes 15
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Based on the theory of rock and coal and gas migration , integrated use of theoretical analysis and computer numerical simulation , laboratory similar material simulation and on-site industrial test a variety of research methods , under the protection layer mining coal and rock overlying stress distribution , protection layer relief the deformation regularity and surface drilling relief gas drainage system . Obtained under the protection layer mining protected layer stress distribution , relief scope deformation law and ground drilling relief gas drainage effect ; mined under the protective layer of the protective layer can be fully relief , relief angle of protection of about 500 ; along the strike of the protective layer is divided into 5 areas \Under the protective layer under the influence of mining , the protective layer of gas pressure from the original 4.5MPa reduced to 0.6MPa the seam permeability coefficient becomes 1820 times before original permeability coefficient mining , the protective layer to get full relief . The Ground Gas drilling can move on mining -affected zone pressure relief gas for a long time , effectively pre - extraction . The results of this study highlight the risk of coal seam mining and regional Removing Outburst universal guiding significance and reference value .

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