为了保证矿井顺利安全的揭开淮南矿业集团新庄孜矿B4煤层,根据矿井B4煤层赋存及突出危险性情况,进行了水力扩孔试验。通过对水力扩孔后的钻孔瓦斯流量、排出煤屑率、瓦斯抽排率钻孔等指标的考察以及揭煤过程中防突效果的验证,综合分析认为：水力扩孔技术在石门揭煤过程中可以提高钻孔瓦斯抽排效果,减少防突工程,加快石门揭煤速度。

This paper applied catastrophe theory from nonlinear theory to explaining hole spraying cause in drilling through strata on the basis of behavior style and mechanics condition of hole spraying in drilling through strata.For meeting the need of drilling safety,it also introduced prevention measures for hole spraying.Actual application showed that these measures could control effectively coal and methane spraying in drilling through strata and eliminate safety accident occurrence in hole drilling.

祁东煤矿为高瓦斯突出矿井,通过介绍该矿在地质构造复杂区域高瓦斯煤层3246突出威胁工作面采掘过程中采取的防突技术、瓦斯治理措施、管理制度、管理体系.总结了其中的技术创新和操作标准化,为地质构造复杂区域高瓦斯突出煤层掘进防治煤与瓦斯突出的开展提供了一定的参考.

叙述了钳式夹持器的基本工作原理,并结合ZKY-1200防突远距离控制钻机详细地介绍了双夹持器的设计计算过程.