【摘要】 试验研究表明,煤岩在冲击破裂过程中,裂缝的形成和颗粒的摩擦会产生电磁辐射;煤岩体所受的应力越高、变形破裂越强烈,电磁辐射信号越强;现场观测的微震和冲击矿压发生前,电磁辐射也有较大幅度的增加.为此,提出了非接触式电磁辐射预测冲击矿压危险的临界指标和偏差技术.更多还原

【Abstract】 Experimental study show that the EME(electromagnetic emission) is caused by the crack expands and friction of granule during rock and coal burst failure. The higher the stress in the coal is, the stronger the deformation and the failure are, and the stronger the signal of the EME is. The EME is increased by a relatively large margin before the slight shock and rock burst break out at spot. Therefore, some methods to monitor and forecast the danger of rock burst are propsed, such as critical point and deviation values which by non-contract method.更多还原