矿山松散介质堆积体滑移及失稳破坏的声发射特性研究

矿山排土场、尾矿库为松散介质堆积体，堆积体的失稳破坏将造成重大安全事故，其稳定性监测、预测具有十分重要的理论和现实意义。目前，排土场、尾矿库稳定性监测主要采用变形监测，无法反映松散介质体内部滑移、失稳过程，致使失稳破坏预测尚未有有效的定量判据，成为急需解决的难点、热点问题。本项目根据松散介质颗粒间滑移产生声发射现象的原理，拟将声发射技术引入到松散介质堆积体失稳预测中，进行松散介质堆积体失稳过程声发射试验、理论研究，通过试验得到松散介质堆积体颗粒滑移至失稳过程的声发射参数、频率和波形等特征，采用声发射定位试验分析松散介质堆积体失稳演化过程，在上述研究基础上，揭示松散介质颗粒间滑动至宏观失稳的机理，寻求松散介质堆积体失稳声发射判据，研究成果具有重要的理论价值，同时为松散介质堆积体失稳声发射预测提供重要的科学依据。

Waste dump and tailings pond are both loose medium accumulation. The instability of accumulation deposit will induce great safety accidents. So the monitoring and prediction for its stability have an important practical and theoretical significance. At present various deformation measurements are used as a main method for stability monitoring, but the process of slide among particles and instability can not be revealed. So the effective quantitative criterion has not been established and it becomes the key problem. The project will apply acoustic emission(AE) technology to the prediction of instability of loose medium accumulation deposit. The comprehensive researches including acoustic emission test and theoretical analysis of evolution process of silde to instability of losse medium accumulation deposit will be carried out. First, the characteristics about the AE parameters, frequency, wave pattern etc. with the process of slide to instability of loose medium accumulation deposit will be obtained by lab tests. Second, space-time evolution rules from slide to instability of loose medium accumulation deposit will be acquired by AE source location test.Based on researches mentioned above we will reveal the mechanism of slide to instability of loose medium accumulation deposit and determine the corresponding criterion of instability. Achievements not only have an important theoretical value but also provide scientific basis for prediction of instability of loose medium accumulation deposit.