扇形高位钻孔与倾向高位巷瓦斯抽采效果对比分析研究

Contrast analysis of gas drainage effect for sectorial high-level borehole and inclined high-level roadway

为了解决工作面瓦斯超限问题,沙曲矿在24207工作面进行了大孔径钻孔替代倾向高位巷抽采裂隙带瓦斯的试验。结果表明,使用大孔径钻孔抽采效果较为显著,现场工程中一个钻场5个钻孔的平均抽采纯量12.20m3/min,高于倾向高位巷10.05m3/min的抽采纯量,且有效控制范围是倾向高位巷的1.4～2倍。

In order to solve the problem of gas overrun, the trial of gas drainage in fissure zone was carried out through large-diameter boreholes instead of inclined high-level roadway at 24207 mining face in Shaqu Coal Mine. The drainage result showed that the large-diameter boreholes are good for the gas drainage. The average gas drainage amount for 5 boreholes in one drilling site is up to 12.20 m3/min, higher than the value of 10.05 m3/min via high-level roadway, and the effective control range is 1.4-2 times than that of high-level roadway.