TITLE

Research on Mechanism of Fault Rock Burst

AUTHOR(S)
Sui-mu, YANG; Ning-bo, ZHANG; Jun, LIU; Shan-kun, ZHAO
PUB. DATE
October 2014
SOURCE
Coal Science & Technology (0253-2336);Oct2014, Vol. 42 Issue 10, p6
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
In order to obtain the mechanism of fault rock burst occurred,taking F16 fault in Yima mining area as a study object,this paper used analog simulation and numerical simulation method.The process of fault rock burst induced by mining disturbance was researched and a sensitive index of fault slip was proposed.The reason of fault rock burst was revealed.The result showed that according to mining disturbance degree ,fault rock burst contains three stages which were start of fault activation ,fault intense activation and fault impact.The ratio of sheer stress and normal stress could connect fault stress field and fault activity,the ratio was sensitive indicator of fawt slip instability.When the stress ratio was low ,sliding velocity was almost zero.When the ratio rised ,sliding speed began to wave and increased gradually.When the ratio reached at maximum,the fault sliding instability,sliding velocity mutations and fault rock burst occurred.The overlying strata destruction caused by mining was the direct cause of fault rock burst and its root cause was changed to fault stress field.
ACCESSION #
99618703

 

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