Mengxi Coal Chemical Co. , Ltd. , CHN Energy Group

以棋盘井煤矿(东区)11101运输巷为工程背景,对中厚煤层无煤柱切顶聚能爆破装药参数的优化进行研究。研究了切顶爆破的机理和装药参数,并采用数值模拟进行了单孔和多孔爆破验证,设计出针对于11101工作面的工程情况下的切顶聚能爆破参数。结果表明:顶板主要以砂质泥岩为主的破碎顶板的切缝率相较于砂岩顶板和完整顶板试验组较低。同时发现封泥段内的顶板是砂质泥岩时,孔口会产生一定程度的破坏。采场顶板的预裂切缝效果直接影响着采空区矸石的充填效果,进而影响采场上覆岩层的应力传递。通过现场爆破试验验证相关结论,并确定出适合于棋盘井煤矿(东区)11101工作面的爆破技术参数,作为指导切顶卸压的一项关键技术。

The optimization of the charging parameters of roof-cutting cumulative energy blasting in non-pillar medium-thick coal seam is investigated based on the engineering background of No. 11101 transport roadway at Qipanjing Coal Mine (East Area). Through the mechanism and charging parameters of roof - cutting blasting, numerical simulation is used to verify single-hole and multi -hole blasting. Roof -cutting energy blasting parameters are designed for the engineering situation of No. 11101 working face. The results indicate that the cutting rate of mainly sandy mudstone broken roof is lower than the sandstone roof and intact roof test groups. It is also found that when the roof in mud sealing section is sandy mudstone, the opening shows a certain degree of damage. The effect of the pre-cracking slit of the roof in quarry directly affects gangue filling effect in the mining area, which in turn affects the stress transfer in overlying rock layer of the quarry. The relevant conclusions are verified through on - site blasting tests, and the blasting technical parameters suitable for No. 11101 working face of Qipanjing Coal Mine (East area) are determined as a key technology to guide roof cutting and pressure relief.

娄杰,张燕斌,温慧,等.中厚煤层无煤柱切顶聚能爆破装药参数优化研究[J].煤炭工程,2024,56(12):76-82.