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Study on Supporting Technology of Huge Thick Coal Entry under Rock Burst Condition
Author: GuoShouSong
Tutor: ZhouYing
School: Henan Polytechnic University
Course: Mining engineering
Keywords: Rockburst Mining Roadway Bolting Numerical Simulation
CLC: TD353
Type: Master's thesis
Year: 2007
Downloads: 130
Quote: 0
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Abstract
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Thick coal seam protection is one of the challenges facing the coal mining , with the coal mining depth increases , the impact of pressure so that this type of roadway becomes more difficult . In this paper, for the study of mining gateway to the the Qianqiu Coal 21181 and 21121 Face to study the impact pressure tendency thick coal seam with . The paper uses the method of theoretical analysis and field trials , analysis of the characteristics and influencing factors of the geological conditions of rock burst occurred , the mine seam impact pressure burst tendency of the medium . The use of rock fracture the whole process of analysis software RFPA2D rock burst mechanism of surrounding rock failure mechanism was studied on the basis of failure analysis of the I-beam arch support support , by comparison, Bolting word steel arch support combined support program , the application of finite difference software FLAC3D support parameters to optimize the improvement measures were proposed and existing I-beam arch support . Support parameters in accordance with the selected track Lane 21121 Face -site industrial test , observations proved Bolting I-beam arch support combined support better control the deformation of surrounding rock , reaching the desired objectives. Through this study , to overcome the impact tendency thick coal seam large section along the bottom boring the Seam and buried deep in the tunnel , large deformation , rockburst to solve the difficulty in supporting this important issue to ensure that the mine is normal production .
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CLC: > Industrial Technology > Mining Engineering > Mine the pressure and support > Mine support equipment > Roadway support
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