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中文摘要：
声发射是煤等脆性材料破坏过程中经常伴随的现象,是脆性材料因外力受损在其内部以弹性波快速释放出来的应变能,因应力分布不均匀所导致的由不稳定高能态向稳定的低能态过渡时产生的松弛过程,其活动性反映了煤微观破坏的活动性.通过声发射振铃计数率和能量计数率的特征研究了煤岩在各阶段的损伤演化过程,确定了煤损伤各个阶段的损伤临界值.
英文摘要：
Accompanied often by the failure process of brittle materials such as coal, acoustic emission phenomenon is the rapid release of strain energy in the internal elastic wave when the brittle material is damaged due to external forces with the uneven distribution of stress caused by the unstable high-energy state to a stable relaxation process in the low energy state transition,whose activity reflects that of coal microscopic damage. In this paper,according to the characteristics of acoustic emission ringing count rate and energy count rate, the damage evolution of coal and rock in various stages of the process was studied, and the damage threshold of the various stages of the coal damage was determined.
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