底抽巷穿层钻孔抽采参数优化研究
杜万军
（中阳县应急管理局，山西 中阳 033400）
摘要： 针对暖泉煤业底抽巷瓦斯抽采时层位不当、抽采效果差等问题，对合理层位、钻孔间距、有效半径等参数进
行了系统研究，并在现场进行了试验。结果表明，底抽巷层位布置在3#煤层下方7耀9 m处比较合适，工作面预抽90 d
的合理钻孔间距为3 m，有效抽采半径为1.5 m，预抽时间与钻孔间距和有效抽采半径同步变化，满足矿方市场需求。
关键词： 底抽巷；瓦斯抽采；有效半径
中图分类号： TD712⁺.6     文献标识码： A     文章编号： 2095-0802-(2021)09-0056-03
Study on Optimization of Drilling and Drainage Parameters in Bottom-drainage Roadway
Crossing Layers
DU Wanjun
(Zhongyang Emergency Management Bureau, Zhongyang 033400, Shanxi, China)
Abstract: Aiming at the problems of improper strata and poor drainage effect during gas drainage in the bottom-drainage roadway
of Nuanquan Coal Industry Co., Ltd., this paper carried out a systematic study on parameters such as reasonable strata, borehole
spacing and effective radius. And tests were carried on site. The results show that the layout of the bottom-drainage roadway
at 7-9 m below the 3# coal seam is more appropriate, the reasonable drilling spacing for 90 d of working face pre-drainage is 3 m,
and the effective drainage radius is 1.5 m. The pre-draining time changes synchronously with the borehole spacing and the effective
drainage radius to meet the needs of the mine market.

Key words: bottom-drainage roadway; gas drainage; effective radius