提高煤层气抽采钻孔封孔效果研究与应用

Study on Improving the Sealing Effect of CMM Drainage Boreholes and Its Application

为提高矿井煤层气抽采钻孔封孔效果,提出了应针对煤层地质条件,优先选择新型封孔材料及联合封孔,提高钻孔密封性,且使用钻孔漏气部位检测装置确定合理的封孔深度。应用效果表明了煤层气抽采钻孔封孔技术优化,能达到提高煤层气抽采浓度和抽采量的目的。

In order to improve the sealing effect of CMM drainage boreholes, the paper proposes to select new type of sealing materials according to the geological conditions of the coal seams and to carry out combined sealing of boreholes in order to improve the sealing property. Detection device is applied to check the position of gas leakage for determination of rational sealing depth. The results of optimization of sealing technology for CMM boreholes have indicated that aim of improving the concentration and quantity of drained gas can be achieved.