瓦斯流量法在测定卸压瓦斯穿层钻孔抽采半径中的应用

Application of Gas Flow Method in Determining Drainage Radius of Layer-through Borehole in Measuring Pressure-relief Gas

为了提高瓦斯抽采中钻孔布孔间距的合理性,将瓦斯流量作为考察指标,对金岭煤业二1煤层开展了穿层钻孔有效抽采半径的测试研究。结果表明:瓦斯流量法测量穿层钻孔的有效抽采半径是一种有效的方法,并确定了金岭煤业采用穿层钻孔进行煤层卸压瓦斯预抽时,其有效抽采半径为7 m。

To improve the rationality of drillhole spacing in gas drainage, relevant measuring study was carried out in Ⅱ1 coal seam of Jinling Coal Industry Company by taking gas flow as the index. The results show that：gas flow method is an effective method in measur- ing the effective drainage radius of layer-through boreholes. It was also determined that the effective drainage radius of 7 m when using layer-through boreholes for the pressure relief gas pre-drainage in Jinling Coal Industry Company.