基于声发射能量值的煤岩试样损伤分析

Damage analysis of coal and rock samples based on acoustic emission energy value

试样内部微裂纹在压力作用下的萌生、分叉、扩展及贯通,最终导致了试样的破坏。声发射检测系统能实时检测获得试样在变形破坏过程中声发射信号,获得的声发射特征参数也因此包含了煤岩试样变形破坏过程中大量的损伤信息。通过利用试验获得的声发射特征参数对岩石变形破坏过程的损伤进行分析研究,得出岩石的声发射现象与岩石的损伤有密切关系。

The initiation,branching,propagation and coalescence of micro cracks under the pressure in the specimen will lead to the failure of the specimen. Acoustic emission detection system can detect the acoustic emission signal in the process of deformation and failure,and the acoustic emission characteristic parameters can be obtained. Through the analysis of the damage of rock deformation and failure process by using the acoustic emission characteristic parameters obtained from experiments,it was concluded that the acoustic emission of rock is closely related to the damage of rock.