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对类似汽油贮存库、压缩空气能量贮存室和高品位核废料贮藏库这类大型深部地下硐室稳定性进行监测,不论在其建筑过程中,还是在建设完成之后,都是极其重要的。硐室围岩松动区的性态对硐室的稳定性有很大的影响,因此研究由于开挖引起的围岩松动机理是非常重要的,作者运用声发射(AE)监测技术进行了室内和现场实验,对硐室围岩的破坏机理进行了研究。实验结果表明,参数m(声发射事件振幅与频率之比)和声发射能量(声发射振幅的平方)是测定岩石产生小规模破坏,即围岩产生松动破坏的有效指标。
The monitoring of the stability of large, deep underground chambers such as gasoline storages, compressed-air energy stores, and high-grade nuclear waste storages is extremely important, both during and after construction. The behavior of the loose zone of the surrounding rock of the chamber has a great influence on the stability of the chamber. Therefore, it is very important to study the loosening mechanism of the surrounding rock caused by the excavation. The authors used acoustic emission (AE) monitoring technology to perform indoor and In-situ experiments have studied the damage mechanism of the surrounding rock of the chamber. The experimental results show that the parameter m (the ratio of the amplitude of the acoustic emission event to the frequency) and the acoustic emission energy (the square of the amplitude of the acoustic emission) are the effective indicators to measure the small-scale destruction of the rock, that is, the loosening of the surrounding rock.