六盘水师范学院学报2024，Vol.36Issue(6)：18-26,9.DOI:10.16595/j.1671-055X.2024.06.002
煤层群立体式长距离定向钻孔瓦斯抽采技术研究
Study on Gas Extraction Technology of Vertical Long Directional Drilling in Coal Seams Group
摘要
Abstract
Aiming at the problem that a large amount of pressure-relieved gas from adjacent coal seams pours into the first mining face in the mining of high-gas close-distance coal seam group,the distribution and evolution law of mining-induced frac-tures in close-distance coal seam group were revealed by means of numerical simulation and field measurement,and the technical scheme of three-dimensional long-distance directional drilling gas extraction in coal seam group was proposed.In this paper,ac-cording to the field conditions of a mine test face,the technical parameters of the layout of three-dimensional long distance direc-tional gas extraction borehole in the upper,middle and lower strata are determined.The field application results show that during the observation period,the average concentration and purity of gas extraction in the roof long distance directional drilling are 48.9%and 0.71 m3/min,respectively.The average concentration and purity of gas extraction in the coal seam gas extraction pipe-line are 20%and 6.73 m3/min respectively.The average gas extraction concentration and purity of long directional borehole in floor are 40%and 0.43 m3/min,respectively.关键词
高瓦斯/采动裂隙/数值模拟/长距离定向钻孔Key words
High-gas/Mining-induced fracture/Numerical simulation/Long directional drilling分类
矿业与冶金引用本文复制引用
张鹏,袁胜..煤层群立体式长距离定向钻孔瓦斯抽采技术研究[J].六盘水师范学院学报,2024,36(6):18-26,9.基金项目
贵州省大学生创新训练计划项目"黔西地区龙潭组泥页岩储层精细表征"(202310977136). （202310977136）
