底板抽采巷前探钻孔防止误揭突出煤层的应用

Application of Preventing Uncovering Outburst Coal Seam by mistake in Floor Drainage and Boring in front of Roadway

尚庄煤矿为煤与瓦斯突出矿井,矿井地质条件较复杂,断层、褶曲发育,开采的B4煤层属高瓦斯低透气性松软煤层,且不具备开采保护层的条件。煤巷掘进工作面采用底板穿层钻孔预抽煤巷条带煤层瓦斯区域防突措施,在煤层底板抽采巷道掘进过程中,通过超前施工探煤钻孔,掌握掘进巷道前方煤层及地质构造情况,分析勘测验证地质资料,编制巷道剖面图,及时掌握施工动态和围岩变化情况,防止误穿突出煤层。7131风巷底抽巷断层发育,实际施工证明,只要做到先探后掘,就能杜绝煤层底抽巷误揭突出煤层事故发生。

Aiming at the complicated geological conditions,developed faults and folds and soft B4 coal seam with high-gas and low permeability in Shangzhuang Colliery,the authors propose the outburst measures of pre-drainage in strip seam gas area by floor-penetrating drilling at heading face,which can obtain the surveying geological data in anterior roadway and prevent uncovering outburst coal seam by mistake.