摘要
针对平煤股份二矿庚20煤层工作面推进过程中顶板坚硬不易自然垮落,上隅角形成大面积悬顶,造成瓦斯大量积聚,严重影响安全生产的问题,研究应用了深孔爆破切顶技术,设计了切顶钻孔及炸药技术方案。应用结果表明:采用切顶钻孔深7 m,2+2的装药模式爆破切顶,上隅角悬顶面积减少80%,切顶后压力有效释放,巷道位移量明显减小,保障了工作面的安全生产。
Aiming at the problem that the roof is hard and not easy to fall naturally during the advance of the No.2 Geng20 coal seam face in Pingdingshan Coal Mine, a large area of suspended roof is formed in the upper corner,resulting in a large amount of gas accumulation and seriously affecting the safety of production, the roof cutting technology of deep-hole blasting is studied and applied, and the technical scheme of top-cutting drilling and explosive is designed. The application results show that when the roof is cut by blasting with a drilling depth of 7 m, blasting roof cutting in charge mode of 2+2, the suspended roof area of the upper corner is reduced by 80%, the pressure is effectively released after roof cutting, and the roadway displacement is obviously reduced, which ensures the safe production of the working face.
作者
杨东方
Yang Dongfang(No.2 Coal Mine of Pingdingshan Tianan Coal Industry Co.,Ltd.,Henan Pingdingshan 467000)
出处
《山东煤炭科技》
2021年第10期67-69,72,共4页
Shandong Coal Science and Technology
关键词
坚硬
爆破
切顶
hard
explode
top cutting