摘要
为加强胡底煤业1301(上)采煤工作面瓦斯治理,设计并实施了一口L型井对井下采空区瓦斯进行抽采,分析和评价了L型井抽采过程及抽采效果。结果表明:L型井距离3#煤层9~12倍采高为最佳层位;L型井布置角度应与煤层倾角保持一致并尽量布置在同一岩层中时,避免穿层发生塌孔;L型井应与回风巷保持一定距离,最佳距离在40~70m;L型井能有效降低上隅角及工作面回风流中的瓦斯浓度,瓦斯抽采效果明显。研究成果为将来L型井的设计及施工提供了良好基础和借鉴。
In order to strengthen the gas control of the 1301（ upper） coal mining face of Hudi Coal Mine,an L-shaped well was designed and implemented to extract the gas that gathers in goaf. The L-shaped well extraction process and drainage effect were analyzed and evaluated. The results show that： the best location of L-shaped well is 9 ~ 12 times higher than the 3#coal seam; the L-shaped well arrangement angle should be consistent with the coal seam inclination and be placed in the same layer as much as possible to avoid hole collapsing; the L-shaped well should maintain a certain distance from the return air lane,and the optimal distance is 40 ~ 70 m; the L-shaped well can effectively reduce gas concentration in the upper corner and the return flow of the working face,and the gas drainage effect is significant. The research results provide a good foundation and reference for the future design and construction of L-shaped wells.
作者
刘毅
张晓铭
LIU Yi;ZHANG Xiao-ming(Hudi Coal Mining Co.,Ltd.,Shanxi Jincheng Anthracite Mining Group Co.,Ltd.,Jincheng 048214,China)
出处
《煤炭工程》
北大核心
2018年第9期59-62,共4页
Coal Engineering
关键词
L型井
采空区
瓦斯抽采
瓦斯浓度
L-shaped well
goaf gas control
drainage effect
gas concentration
