基于压降法测定瓦斯抽采影响半径的研究

Based on Gas Pressure Drop Method Extraction of Radius of Influence Research

为了确定玉溪煤矿3号煤层穿层钻孔合理的瓦斯抽采影响半径,采用压降法进行现场测试。测试结果表明:预抽6 d、9 d、14 d、26 d、33 d的瓦斯抽采影响半径分别1.8 m、2.3 m、2.6 m、3.2 m、3.6 m。对实测值进行回归分析,最终得出玉溪煤矿瓦斯抽采影响半径与抽采时间的关系曲线,为制定煤层瓦斯区域消突措施、合理布置抽采钻孔提供科学的参考依据。

In order to determination the reasonable crossing hole influence radius of gas drainage in No. 3 Coal Seam of Yuxi Coal Mine,the pressure falling method was used for field test. The field test results showed that： through gas pre- drainage 6 days,9 days,14 days,26 days,33 days and theinfluence radius of gas drainage are 1. 8 m,2. 3 m and 2. 6 m. It is finally included that the relation between influence radius of gas drainage and drainage time through analysis of the measured data,which could provide the scientific base to the regional outburst prevention mesures and reasonably assign the gas drainage borehole.