摘要
分析了浅埋深煤层坚硬顶板条件下尾巷冲击地压的成因,提出采用顶板弱化爆破技术进行冲击地压解危的防治思路,设计了断顶爆破方案,并用电磁辐射手段对解危效果进行了检验。通过优化断顶爆破中的炮孔深度、间距和装药量能够达到较好的解危效果;爆破试验段的监测对比显示,煤体电磁辐射强度明显减弱,减幅约为68.2%,爆破后卸压效果明显。
It made an analytical reasoning for rock tailings pressure dump under condition of shallow buried depth coal seam hard roof, it put forward the prevention ideas for solving rock burst danger by using roof weaken blasting technology, it design fault roof blasting program, and it detected danger solution effect by electromagnetic radiation means. It achieved good effect by optimizing the fault roof blasting in the hole depth, spacing and loading mass;the media electromagnetic radiation intensity decreased significantly the damping is about 68.2%, the pressure relief effect is obvious after blasting according to the contrast display of blasting test section monitoring con- trast.
出处
《煤》
2014年第4期16-18,共3页
Coal
基金
煤炭资源与安全开采国家重点实验室开放基金项目(SKLCRSM11KFB08)
关键词
冲击地压
坚硬顶板
断顶爆破
电磁辐射
impact pressure
hard roof
broken roof blasting
electromagnetic radiation
