【摘要】 因模型试验和数值仿真对岩体的局限性,应用岩体声发射技术监测评价岩体工程的稳定性不可缺少,有时是唯一不可替代的技术之一。岩体监测预报,曾普遍应用0～1kHz的低频声发射仪,仅用事件和能率作为预报参数,加上复杂岩体的声发射特征还认识不清,且没有很好的噪音剔除方法,使得采集频带可能过宽,信号接收的敏感性可能偏低,预报判据有时很不充分,监测很容易受环境干扰。本文简要叙述了近年发现的岩石(体)声发射的一些特征,据此提出了岩体声发射技术研发的若干建议,包括仪器改进与完善,噪音剔除新方法研究和复杂岩体AE特性研究等。更多还原

【Abstract】 Owing to the limitation of model simulation and numerical simulation for rock-mass,Acoustic Emission(AE)techniques play an important role in monitoring and evaluating rock-mass stability.0~1 kHz AE apparatus is generally adopted and only the AE event and AE energy are used in monitoring and forecasting.Without a clear understanding of the AE characteristics of rock-mass and without an efficient way to remove noise,too broad frequency band has to be adopted to collect AE signals,with low sensitivity of signal reception.Moreover,the prediction criterion is sometimes inadequate and monitoring is very susceptible to environmental interference.In this paper,some AE characteristics of rock /rock-mass discovered in recent years are reviewed.Based on that knowledge,some suggestions on studying and developing AE techniques for rock-mass are put forward,including development of equipment to improve noise removal and study on complex characteristics of rock-mass.更多还原