水力压裂综合增透技术研究与实践

Research and Practice of Comprehensive Anti-reflective Technology of Hydraulic Fracturing

采取先压裂、后冲孔增透措施,使钻孔周围煤体产生更多的裂隙,孔内保持畅通,增大钻孔的卸压范围,使煤层的地应力和瓦斯压力重新分布,增强煤层内瓦斯的流动性,增大低透气煤层的透气性能,提高瓦斯抽采效果,最终使煤体中的高应力变形区和高瓦斯压力区得以消除。

Taking measures that firstly make the fracture,then punch anti-reflection to make the coal body produce more cracks,and holes remain open,increasing the pressure relief range,as a result,the ground stress and gas pressure of the coal seam will be redistributed,methane mobility of coal seam will be increased,permeability of low permeability coal seam and the effect of gas extraction will be improved.At last,ultimately enable high stress deformation and high gas pressure zone to be eliminated.