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冲击矿压预测的电磁辐射技术及应用
Electromagnetic emission technique of monitoring rock burst and its application
【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.
【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.
【关键词】 冲击矿压;
电磁辐射;
临界指标;
偏差值;
危险监测;
【Key words】 rock burst; electromagnetic emission (EME); critical point; deviation values; monitoring danger;
【Key words】 rock burst; electromagnetic emission (EME); critical point; deviation values; monitoring danger;
【基金】 国家自然科学基金资助项目(50074030);国家自然科学基金重点资助项目(50134040);教育部博士点基金资助项目(20030290017)
- 【文献出处】 煤炭学报 ,Journal of China Coal Society , 编辑部邮箱 ,2004年04期
- 【分类号】TD324
- 【被引频次】112
- 【下载频次】702