Precursory phenomena of acoustic emission and evolutionary laws of crack propagation path in diorite fracturing
In order to study the evolutionary laws of crack propagation paths during rock fracturing,a crack propa-gation path analysis method was established based on acoustic emission monitoring data,combined with moment tensor inversion,crack scale quantification,and crack topological relationship quantification.Through indoor acoustic emission tests,the process of diorite uniaxial compression failure was analyzed.The research results show that the characteristic scale of microcracks generated in diorite during the loading process is 1.06 mm,significantly higher than the average scale of mineral grains.With the increase of stress,the microcracks inside the diorite specimen gradually transition from a discrete state to a coalesced state,and microcrack concentration zones are more prone to evolve into macroscopic cracks.
NETL
NSTL
万方数据
维普
