声发射率和能率在岩石失稳破坏预测中的应用

岩石声发射率和能率是反映岩石破坏的重要参数,但是,目前利用岩石声发射参数进行岩石失稳破坏预测的研究大多采用声发射率而较少利用声发射能率。为此,采用某矿石灰岩的单轴压缩试验声发射活动参数,首先对岩石破坏前声发射率和能率的突增现象进行了描述,并对声发射率和能率的关系进行了研究,发现声发射率和能率有较好的一致性。然后,运用突变理论对上述声发射率和能率建立了岩石失稳破坏的突变预测模型,通过这2种参数的突变判定法则对比分析,结果表明,声发射率和能率的突变模型都能较好地预测岩石失稳破坏。

Application of Acoustic Emission Rate and Energy Rate in Rock Failure

The acoustic emission rate and the energy rate are the key parameters of reflecting the rock failure. However, at present many scholars prefer acoustic emission rate to energy rate for predicting the rock failure. The research adopts the acoustic emission parameters at uniaxial compression of a kind of limestone rocks to firstly describe the catastrophe phenomenon of acoustic emission rate and energy rate, and research on the relationship of between acoustic emission rate and energy rate. It is found that the acoustic emission rate fully accord with that of energy. Then, the catastrophe theory is applied to establish the catastrophic forecasting model of rock failure for the above acoustic emission rate and energy rate. So a comparative study of the catastrophe model of acoustic emission parameters analysis is introduced in this paper. It was concluded that the catastrophe model of acoustic emission rate and energy rate can well predict the rock failure.