陕西煤炭2024，Vol.43Issue(6)：44-49,76,7.DOI:10.20120/j.cnki.issn.1671-749x.2024.0609
黄陵二号煤矿煤层瓦斯高效预抽技术
High-efficient pre-extraction technology of coal seam gas in Huangling No.2 Coal Mine
仵胜利 1闫赞1
作者信息
- 1. 陕西陕煤黄陵矿业有限公司,陕西延安 727307
- 折叠
摘要
Abstract
In order to improve the accuracy and science of drilling arrangement in bedding,a fluid-structure coupling mathe-matical model of gas-containing coal was established based on Fick's diffusion law,Darcy's Law,ideal gas equation of state and generalized Langmuir equation.COMSOL Multiphysics simulation software was used to analyze the influential law of borehole diameter and spacing on coal seam gas pre-extraction of borehole.The results show that the attenuation range and effective influential radius of coal seam gas pressure are larger when the diameter of borehole is larger in a certain range.Under different spacing of borehole,the gas pressure near the borehole is the smallest,while the gas pressure away from the borehole is gradually increased.When the expected extraction target is required to be achieved within the pre-extraction time,the optimal borehole layout is 90 mm in diameter and 6 m in spacing.关键词
瓦斯预抽/顺层钻孔/数值模拟/布孔间距/钻孔直径Key words
gas pre-extraction/bedding drilling/numerical simulation/arrange drilling spacing/borehole diameter分类
矿业与冶金引用本文复制引用
仵胜利,闫赞..黄陵二号煤矿煤层瓦斯高效预抽技术[J].陕西煤炭,2024,43(6):44-49,76,7.
