基于COMSOL数值模拟钻孔瓦斯抽采影响因素研究
Research on the Influencing Factors of Gas Extraction in Boreholes Based on COMSOL Numerical Simulation
孙刘咏 1田佳阔 2张耕显 2王照雨2
作者信息
- 1. 陕西建新煤化有限责任公司 陕西 727300
- 2. 中国矿业大学安全工程学院 江苏 221116
- 折叠
摘要
钻孔瓦斯抽采是对煤矿瓦斯灾害防治的重要手段,瓦斯抽采效果受到多种因素影响.构建瓦斯抽采流固多场耦合模型,利用COMSOL软件数值模拟顺层钻孔瓦斯抽采参数,研究不同钻孔孔径、煤层渗透率条件下有效抽采半径、抽采达标区域面积、瓦斯抽采速率的变化规律.结果表明:有效抽采半径、抽采达标区域面积、瓦斯抽采速率均与煤层渗透率呈正相关性,且随着钻孔孔径的增大而增加.
Abstract
Gas extraction is an important means for the prevention of coal mine gas disasters,and the effectiveness of gas extraction is influ-enced by various factors.A multi-field coupling model for gas extraction was constructed,and COMSOL software was used to numerically simulate the parameters of gas extraction along coal seam.Under different borehole aperture and coal seam permeability,the variation of effective extraction radius,extraction standard area and gas extraction rate were researched.The results show that the effective extraction radius,extraction standard area and gas extraction rate are all positively correlated with the coal seam permeability,and increase with the increasing borehole diameter.
关键词
瓦斯抽采/数值模拟/影响因素/多场耦合Key words
gas extraction/numerical simulation/influencing factors/multi-field coupling引用本文复制引用
出版年
2025
NETL
NSTL
万方数据