Abstract:In general,the problem of rock mechanics is the mechanical behavior of fractured rock-mass in the engineering scale,especially the strength distribution,deformation character and failure evolution of fractured rock-mass under loading. In this paper,the study of failure evolution process and differences between intact coal and fractured coal rock-mass with single fracture and multiple fractures,according to the distribution of max-amplitude of acoustic emission under uniaxial loading,is based on specimens of fractured coal rock-mass obtained by pre-loading on intact coal. The study results are as follows:the value of can describe the distribution regularity of max-amplitude of AE during the failure evolution process under loading,and the value increases with increasing block to the expansion of fractures in specimen;the value of decreases with increasing loading under different stress level and increase with increasing fracture under the same stress level;it can be considered as the precursor of specimen?s failure when the decrease of value becomes flat according to the regularity of value in intact coal and fractured coal rock-mass during the failure evolution process,and that can provide a test basis for the application of AE technology of monitoring and prediction in situ.
赵小平,陈淑芬. 基于声发射振幅分布的裂隙岩体破坏演化过程[J]. 岩石力学与工程学报, 2015, 34(s1): 3012-3017.
ZHAO Xiaoping,CHEN Shufen. FAILURE EVOLUTION PROCESS OF FRACTURED ROCKMASS BASED ON AMPLITUDE OF ACOUSTIC EMISSION. , 2015, 34(s1): 3012-3017.