抽采条件下采空区瓦斯浓度分布规律数值模拟研究  

Numerical Simulation Study on Distribution Law of Gas Concentration in Goaf under Extraction Conditions

作　　者：刘莉彬 林建东[1] Liu Libin;Lin Jiandong(Research Institute of Coal Geophysical Exploration of China National Administration of Coal Geology,Zhuozhou 072750,China)

机构地区：[1]中国煤炭地质总局地球物理勘探研究院,河北涿州072750

出　　处：《煤矿机械》2025年第4期108-111,共4页Coal Mine Machinery

摘　　要：以某矿32320工作面和40205工作面为研究对象,结合定制的瓦斯分布实验平台,通过数值模拟分析了抽采条件下采空区瓦斯分布规律。研究结果表明:在32320工作面,瓦斯浓度在煤层厚度为4.5 m时达到峰值,随后逐渐降低,但在6.0 m时又有所回升;在40205工作面,瓦斯浓度波动相对平缓,在煤层厚度为4.0 m时达到高峰,之后虽有波动但整体保持稳定。成功揭示了抽采条件下采空区瓦斯分布与煤层厚度间的关联规律。Taking the 32320 and 40205 working faces of a certain mine as the research objects,combined with a customized gas distribution experimental platform,the gas distribution law in goaf under extraction conditions was analyzed through numerical simulation.The research results show that in the 32320 working face,the gas concentration reaches its peak when the coal seam thickness is 4.5 m,then gradually decreases,but rises again at 6.0 m.The gas concentration fluctuation in the 40205 working face is relatively gentle,reaching its peak when the coal seam thickness is 4.0 m,and although there are fluctuations afterwards,it remains stable overall.Successfully revealed the correlation between gas distribution in goaf and coal seam thickness under extraction conditions.

关 键 词：抽采条件 采空区 多孔介质 瓦斯浓度 分布规律 

分 类 号：TD712[矿业工程—矿井通风与安全]