Study on fault induced rock bursts |
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Authors: | LI Zhi-hua DOU Lin-ming LU Cai-ping MU Zong-long CAO An-ye |
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Affiliation: | School of Mines, China University of Mining & Technology, Xuzhou, Jiangsu 221008, China;State Key Laboratory of Coal Resource and Mine Safety, China University of Mining & Technology, Xuzhou,Jiangsu 221008, China |
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Abstract: | In order to study the rules of rock bursts caused by faults by means of mechanical analysis of a roof rock-mass balanced structure and numerical simulation about fault slip destabilization, the effect of coal mining operation on fault plane stresses and slip displacement were studied. The results indicate that the slip displacement sharply increases due to the decrease of normal stress and the increase of shear stress at the fault plane when the working face advances from the footwall to the fault itself, which may induce a fault rock burst. However, this slip displacement will be very small due to the increase of normal stress and the decrease of shear stress when the working face advances from the hanging wall to the fault itself, which results in a very small risk of a fault rock burst. |
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Keywords: | fault slip destabilization rock burst numerical simulation normal stress shear stress |
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