急倾斜特厚煤层开采保护层保护范围及效果研究

Protection Range and Effect of Protective Layer Mining in Steep Extra-thick Coal Seam

针对窑街煤电集团三矿急倾斜特厚、煤(岩)与CO_(2)突出煤层,经过多年的开采治理摸索、实践、调整、总结,形成了三矿煤与CO_(2)特有的治理模式。急倾斜特厚煤层上分层工作面回采后对下分层工作面进行有效卸压保护,进回风巷施工卸压爆破孔,进一步增大了被保护层的有效保护范围,提升了保护效果。通过开采保护层技术研究及应用,有效降低工作面的突出危险,取得了较好的技术经济效益。

Aiming at the steep extra-thick coal seam with coal(rock)and CO_(2)outburst of No.3 Coal Mine,Yaojie Coal Electricity Group Co.,Ltd.,a unique treatment model of coal and CO_(2)for No.3 Coal Mine was formed after years of exploration,practice,adjustment and summary of mining treatment.Effective pressure relief protection was carried out on the lower layer working face after mining on the upper layer working face of steep extra-thick coal seam,and pressure relief blasting holes were constructed in the inlet and return air roadway,which further enlarged the effective protection range of the protected layer and improved the protection effect.Through the research and application of protective layer mining technology,the risk of outburst in working face was effectively reduced,and better technical and economic benefits were obtained.