摘要
采用Fluent数值模拟软件探究了华亭某工作面埋管瓦斯抽采在不同埋管长度(20 m、30 m、40 m)、不同埋管管径(0.2 m、0.3 m、0.4 m)以及不同抽采流量(60 m^(3)/min、80 m^(3)/min、100 m^(3)/min)条件下的采空区瓦斯分布规律。结果表明:在华亭矿区中随着埋管长度的增加,瓦斯向进风侧迁移,上隅角瓦斯体积分数在30 m时达到最低;随着埋管管径的增加,深部进风侧瓦斯体积分数与上隅角瓦斯体积分数均降低,0.3 m时采空区中部瓦斯体积分数达到最低;随着抽采流量的增大,整体采空区的体积分数呈下降趋势,流量为80 m^(3)/min时,上隅角体积分数最低,采空区中部进/回风侧体积分数均衡。经过优化分析,确定了埋管抽采的最佳布置参数组合:埋管长度为30 m,管径为0.3 m,同时抽采流量设定为80 m^(3)/min。在此参数配置下,上隅角的瓦斯体积分数可有效降低至0.41%,该数值符合国家安全生产标准的要求。
The determination of gas drainage parameters directly impacts the extraction efficiency.This study utilized Fluent numerical simulation software to investigate the distribution of goaf gas under various extraction parameters at a working face in Huating Mine:buried pipe lengths(20m,30m,and 40m),buried pipe diameters(0.2 m,0.3m,and 0.4 m),and ex traction flow rates(60 m^(3)/min,80 m^(3)/min,and 100 m^(3)/min).Results indicated that,as the buried pipe length increased,gas migrated toward the intake side,with the upper corner volume fraction reaching its minimum at 30 m.As the buried pipe diameter increased,both the deep intake side gas volume fraction and the upper corner gas volume fraction decreased,with the central goaf gas volume fraction reaching its minimum at 0.3 m diameter.As the extraction flow rate increased,the gas volume fraction in goaf showed a decreasing trend.At a flow rate of 80 m^(3)/min,the gas volume fraction at the upper corner was the lowest,with balanced levels between the in take and return air sides in the central goaf.Through systematic optimization,the optimal parameter combination was determined:a pipe length of 30 m,a diameter of 0.3 m,and an extraction flow rate of 80 m^(3)/min.Under this configuration,the gas volume fraction at the upper corner can be effectively reduced to 0.41%,which complies with national safety production standards.
作者
完颜晓亮
朱辉
吕仲波
陈金云
WANYAN Xiaoliang;ZHU Hui;LÜZhongbo;CHEN Jinyun(Huating Coal Industry Group Co..Ltd.,Pingliang 744100,China)
出处
《山西煤炭》
2025年第4期70-79,86,共11页
Shanxi Coal
关键词
埋管瓦斯抽采
采空区瓦斯
瓦斯防治
数值模拟
buried pipe gas drainage
goaf gas
gas prevention
numerical simulation
