摘要
由于煤岩体中积聚大量弹性能诱发冲击矿压,可以采用卸压爆破技术来逐步释放弹性能,使得冲击矿压发生的敏感指标降至临界值以下,从而避免冲击矿压的发生。通过对冲击矿压发生的敏感指标值理论分析和实践都证明,电磁辐射幅值(强度)能够反映煤岩体的应力状态和积聚的弹性能,是一个能够反映冲击矿压发生概率的敏感指标。
When a great elastic energy accumulated in coal and rock mass, the pressure release blasting technology can be applied to steadily release the elastic energy in order to eliminate an occurrence of pressure bump caused by different factors. The technology can reduce the sensitive index to occur pressure bump to below the critical value to avoid an occurrence of the pressure bump. But how to measur the sensitive index value of pressure bump after the pressure release blasting is a key technical issue. The theoretical analysis and practices showed that the electric magnetic emission value (strength) could reflect the stress status and accumulated elastic energy of the coal and rock mass and could be a sensitive index to reflect the occurrence rate of the pressure bump. Therefore, the electric magnetic emission is a rational and efficient technical meanings to measure the pressure release blasting results.
出处
《煤炭科学技术》
CAS
北大核心
2004年第1期15-18,共4页
Coal Science and Technology
基金
国家自然科学基金资助项目(50074030)
关键词
电磁辐射(EME)
卸压爆破
弹性能
敏感指标
electric magnetic emission (EME)
pressure release blasting
elastic energy
sensitive index
