余吾煤业本煤层顺层钻孔抽采半径判定

About Drainage Radius Determination of Borehole Drilled along Seam in the Seam in Yuwu Coal Industry

余吾煤业工作面抽采方式以本煤层顺层钻孔预抽为主,目前顺层钻孔布置间距为2.5 m,在生产过程中发现距切眼600 m以外区域钻孔均有9个月预抽时间,认为可在此区域布置间距5 m钻孔代替间距2.5 m钻孔。基于余吾煤业实际情况,提出采用可解吸瓦斯含量降低法和瓦斯流量法进行抽采半径测定,叙述了施工概况,并进行了数据分析。

The pre-pumping of working face in Yuwu coal mine is to drill holes along seam, at present the borehole spacing is2.5 m. In the production process, the engineering and technical personnels find that there are 9 months of pre-pumping time from the cut outside 600 m drilling where can be drill hole spacing of 5 m instead of 2.5 m. This paper pointed out desorption gas content reduced and gas flow methods can be used to measure drainage radius based on the actual situation of Yuwu coal mine,described the general situation of construction, and analyzed the data.