综采工作面初采强制放顶预裂爆破孔深度优化

Optimization of pre-splitting blasting of forced caving in fully mechanized working face

结合神东哈拉沟煤矿22529-1综采工作面初采强制放顶实践,应用关键层理论,对预裂爆破孔深度进行优化。结果表明,该工作面采用常规垮落带高度确定初采预裂爆破孔深度为17 m,而基于关键层理论分析,只需施工12.31 m爆破孔即能满足初采安全。采用关键层理论确定爆破孔深度,对神东矿区增收节支具有重要的意义。

Based on the forced caving practice of №22529-1 fully mechanized working face in Halagou coal mine,using key strata theory,the depth of pre-splitting blasting borehole was optimized. By the optimization,the depth of pre-splitting blasting borehole was shortened from 17 m to 12. 31 m. The research has important significance for forced caving in Shendong mining area.