用AE时序参数特征预测岩体失稳的研究

Applying Characters of AE Time Sequence Parameters to Predict Rock Destabilization

对室内岩体失稳过程的声发射参数时序分布进行分析,提出岩体失稳过程与声发射事件参数时序分布特征之间的相关规律。现场监测结果表明岩体破裂变形过程中的声发射信号是随机的,非周期性的,随着地质环境等改变而改变;岩体声发射事件主频时序参数突变,由小突然增大,或是在连续增加时突然减少,都是临近破坏的征兆,AE参数时序特征可作为预测、预报岩体破裂失稳的依据。

Analysis on AE temporal sequence distribution of indoor rock destabilization was carried out, and the relevant rules between the rock destabilization process and the time sequence distribution character of AE event were put forward. The site monitoring results showed that AE signals from rock fracturing evolvement is stochastic and non-periodic and varied with thechange of geological environment, the sudden change of rock AE time sequence parameters from small to larger or sudden reduction while continuously increasing are all signs of rock approaching damage, and the time sequence distribution character of AE parameters can be regarded as the basis of monitoring and predicting rock fracture and destabilization.