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Application of Pre-splitting Blasting Preshearing Technology for Rapid Excavation of Coal Roadway
Author(s): LI Zhong-qun, ZHANG Tian-jun, XU Gang, WANG Qiang, WANG Ning
Pages: 17-
20
Year: 2013
Issue:
2
Journal: Coal
Keyword: 迎头深孔预裂爆破; 低透气性煤层; 迎头瓦斯抽采;
Abstract: 针对五阳煤矿煤层透气性低、瓦斯浓度时常超限、煤巷掘进速度慢和工作面接替紧张等问题,在分析深孔预裂爆破工艺和确定爆破参数的基础上,提出了迎头深孔预裂爆破和巷帮预抽瓦斯的快速掘进技术,并结合现场进行了工业试验.结果表明:深孔预裂爆破技术提高了煤层的透气性,巷帮钻场的瓦斯抽采量为爆破前的1.3倍;降低了掘进工作面的瓦斯涌出量,实施深孔预裂爆破技术后,再没有发生瓦斯浓度超限事故;煤巷掘进月进尺达到180 m,实现了煤巷安全快速掘进.
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