Research on Mechanism of Fault Rock Burst
YANG Sui-mu
ZHANG Ning-bo
LIU Jun
ZHAO Shan-kun
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 sensitivity index of fault slip was proposed.The reason of fault rock burst was revealed.The results showed that according to mining dis-turbance degree,fault rock burst contains three stages which were start of fault activation,fault intense activation and fault impact.The ratio of shear 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 stra-ta destruction caused by mining was the direct cause of fault rock burst and its root cause was changed of fault stress field.
Keywords：rock burstfault activitystrata destructionstress ratio
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 6-9,27 )