【摘要】 岩石冲击破裂过程中 ,裂缝的形成和颗粒的摩擦会产生电磁辐射。煤岩体的电磁辐射是由于非均质煤岩体在应力作用下非均匀变速变形及裂纹形成与扩展过程中 ,内部电荷的迁移而产生。实验室研究了强冲击煤样破坏前后的电磁辐射规律 ,得到煤体应力越大 ,变形破裂越强烈 ,电磁辐射信号也越强 ;确定了煤样冲击破坏的电磁辐射预警值 ;提出了临界指标法、偏差法等监测冲击矿压危险的电磁辐射方法。采用KBD5矿用本安型冲击矿压电磁辐射监测仪对某矿具有严重冲击危险的四层煤工作面进行了矿震和冲击矿压危险监测 ,有效地预测了多次冲击危险 ,取得了良好的效果。更多还原

【Abstract】 Electromagnetic Emission (EME) is caused by crack expands and friction of granule during rock and coal burst failure. EME occurred when inhomogeneous coal or rock is loaded at uneven speed with the moving of internal electrical charges during the development of cracks. Laboratory test indicates the higher the stress in specimen and the more obvious the breaking are,the stronger EME signal will be,which can be used to determine the critical value,The paper presents a method of monitoring the dangerous degree of rock burst by critical index and its deviation value. In the given example,a new apparatus KBD5 is used to monitor the danger of rock burst in seam No.4 of a coal mine with successful forecasts and good effects many times.更多还原