底板瓦斯抽放岩巷合理位置及穿层钻孔布置研究

Study on Reasonable Position of Bottom Gas Drainage Rock Roadway and Layout of Layer Penetration and Hole Drilling

底板瓦斯抽放岩巷穿层钻孔预抽是区域防突的重要措施,合理的底抽巷不仅可以消除回采巷道掘进和工作面回采引起的瓦斯灾害,而且可以避免巷道掘进及工作面回采对底抽巷造成的破坏,因此底抽巷的位置对于自身稳定性以及瓦斯防治具有重要的意义,文章以69104工作面为背景,采用理论分析、数值模拟的方法,研究了该工作面底板抽放巷的合理位置,得出运输巷底抽巷位于运输巷下方垂直10m,且水平距离5m处;并在此基础上设计了穿层钻孔布置方案,通过应用实践,表明对于防止掘进工作面瓦斯突出具有立竿见影的效果。

Layer penetration and hole drilling for pre-pumping in the bottom gas drainage rock roadway is an important measure of regional outburst, reasonable bottom pumping roadway can not only eliminate the gas disaster caused by re?covery of roadway excavation and mining face, but also can avoid damages on the bottom roadway, so the position of bot?tom pumping roadway has important significance for the stability and the gas prevention and control, with the back?ground of the 69104 working face, using theoretical analysis and numerical simulation methods, the reasonable position of the working face bottom drainage roadway is studied, the bottom drainage is found to be10m vertical and 5m horizon?tal to the transport roadway, and on the basis, the layout of layer penetration and hole drilling is designed, the applica?tion practice shows that for preventing the gas outburst of the evacuation face, it has immediate effect.