摘要
为获得青洼煤矿2号煤层顺层钻孔瓦斯抽采合理布置参数,结合现场实际,采用钻孔瓦斯流量法测试有效抽采半径,沿煤层施工抽采钻孔和考察钻孔,测试了工作面抽采钻孔瓦斯流量。根据测试结果,回归分析了抽采有效范围随抽采时间变化的一般规律,建立了二者之间的变化关系数学表达式,获得了不同抽采时间的瓦斯抽采有效半径。在保证无抽采空白带的条件下,优化计算了顺层瓦斯抽采钻孔主要参数,设计了抽采孔合理布置方案,为瓦斯抽采提供理论依据。
In order to obtain the reasonable layout parameters of gas extraction in the borehole along the No.2 coal seam in Qingwa Coal Mine,combined with the actual situation,the effective extraction radius was tested by using the borehole gas flow method,and the gas flow in the borehole was tested along the coal seam.According to the test results,the general law of the variation of effective range of extraction with extraction time is analyzed by regression,and the mathematical expression of the variation relationship between the two is established,and the effective radius of gas extraction with different extraction time is obtained.Under the condition that there is no pumping blank zone,the main parameters of gas extraction borehole are optimized,and the reasonable layout scheme of extraction borehole is designed,which provides a theoretical basis for gas extraction.
作者
孔宏伟
Kong Hongwei(Jinneng Holding Equipment Manufacturing Group Shengtai Energy Investment Co.,LTD.,Jincheng 048000,Shanxi,China)
出处
《江西煤炭科技》
2024年第2期151-153,156,共4页
Jiangxi Coal Science & Technology
关键词
煤层
瓦斯抽采
有效半径
流量法
钻孔参数设计
coal seam
gas extraction
effective radius
flow method
drilling parameter design
