煤岩体突出下受载煤体破坏过程声电信号实验研究

Experimental study on acoustic and electrical signals during failure of loaded coal mass under coal and rock outburst

为了研究原生煤体受载破坏过程的声电信号特征规律,采用实验研究与理论分析相结合的方法,对原生煤体进行了单轴单向加载和单轴循环加载实验研究,分析原生煤体在不同加载条件下的声电信号特征规律。研究结果表明,原生煤体在不同加载条件下声电信号随载荷的增加呈现线性增大,在破坏阶段时达到最大值。且原生煤体的破坏状与标准煤样不同,原生煤体呈现环状破裂。

In order to study the characteristic law of acoustic and electrical signals in the process of primary coal failure under load,a combination of experimental research and theoretical analysis was used to conduct uniaxial unidirectional loading and uniaxial cyclic loading experimental studies on primary coal.Characteristics of acoustic and electrical signals under different loading conditions.The research results showed that under different loading conditions,the acoustic and electrical signal of primary coal increased linearly with the increase of load,and reached the maximum value in the failure stage.In addition,the damage of primary coal body was different from that of standard coal samples,and the primary coal body presented annular fracture.