声发射信号与尖点突变模型预测岩爆

Prediction of rockburst based on acoustic emission signal and cusp Catastrophe model

为研究岩石的应力和强度与声发射的AE数和能量等之间的关系.在单轴加卸载的条件下,对中深部岩石进行岩爆倾向性实验,同时进行声发射监测.实验结果表明:在室内岩爆倾向性实验中,岩石只经过初始压密阶段、弹性变形阶段、非弹性变形阶段初期;在初始压密阶段,岩石的AE数出现少量短时突增,在弹性变形阶段,岩石的AE数和能量迅速增长;利用尖点突变模型,对岩石的声发射参数进行突变分析,进而实现对岩爆的判别.通过声发射参数和尖点突变模型可为预测和防治岩爆提供理论支持.

In order to study the relationship between the stress and the AE number and energy of the rock, this paper studied the stress and the intensity of the rock under the condition of uniaxial loading and unloading. The experimental results show that in the laboratory experiments of rock burst, the rock only passes through the initial compaction stage, elastic deformation stage and non elastic deformation stage. In the initial deformation stage, the AE number of the rock has a small amount of short time. During the elastic deformation stage, the AE number and energy content of the rock can grow rapidly.