陕西煤炭2025，Vol.44Issue(5)：7-11,5.DOI:10.20120/j.cnki.issn.1671-749x.2025.0502
滑脱效应对煤层定向钻孔瓦斯产量影响规律研究
Influential law of slippage effect on coal seam directional drilling gas production
胡彬强 1杜朋1
作者信息
- 1. 陕西华彬煤业股份有限公司,陕西咸阳 713500
- 折叠
摘要
Abstract
In order to investigate the impact of slippage on gas drainage in directional boreholes within coal seams,this study utilizes multi-physical field coupling software to establish a two-dimensional simulation of gas drainage and explores the vari-ations in gas pressure,coal seam permeability,and gas production under conditions of gas-solid coupling with consideration for slippage effects,without consideration for slippage effects,and only considering gas migration.Subsequently,a field test is conducted at the No.1 coal seam of ZF219 working face.The results indicate that after 100 days of simulated drainage,the coal seam gas pressure decreases to below 0.5 × 106 Pa,representing a reduction by approximately 72.22％from its initial level.When considering slippage effects in the context of gas-solid coupling,the coal seam experiences relatively low gas pressure levels alongside significant dynamic changes in permeability and higher levels of gas production;when not consider-ing slippage effects in the context of gas-solid coupling or only focusing on gas migration,changes are not obvious compared to those observed with slippage considerations.The total amount of drained gases from drilling site No.1 ranges between 3 796 m3 and 12 456 m3 with an average drainage volume reaching 8 330 m3 marking an increase of 4.36 times and demon-strating remarkable improvements in drainage efficiency.关键词
滑脱效应/气固耦合/煤层定向钻孔/瓦斯抽采/瓦斯压力Key words
slip effect/gas-solid coupling/coal seam directional drilling/gas extraction/gas pressure分类
矿山工程引用本文复制引用
胡彬强,杜朋..滑脱效应对煤层定向钻孔瓦斯产量影响规律研究[J].陕西煤炭,2025,44(5):7-11,5.
