摘要
为提高煤化程度高、低透气性难抽放的焦煤瓦斯抽放率,论文研究应用水压致裂和爆破致裂技术,可产生适当数目的孔边裂纹和贯通裂纹,实验发现钻孔周围的裂纹数目、几何形态、连通状况等与致裂压力、煤岩体力学性质、应力分布、钻孔直径和周围介质中膨胀波传播速度相关,借助钻孔水压致裂和爆破致裂技术可以提高煤层透气性。
To improve the gas drainage rate from coking coal seam with high gasification, lower permeability and difficult drainage, the paper had a study on hydraulic pressure cracking and blast cracking technologies, which could make certain cracking along the borehole. The research found that the cracking number, the geometric status and connecting along the boreholes had a relationship to the cracking pressure, coal and rock mechamic property, stress distribution, borehole diameter, swelling transmittion speed of the surrounding medium. The seam perraeability can be improved by the hydraulic pressure cracking and blasting cracking technology.
出处
《煤炭工程》
北大核心
2005年第9期61-63,共3页
Coal Engineering
关键词
煤层透气性
瓦斯抽放
低透气煤层
水压致裂
爆破致裂
seam permeability
gas drainage
lower permeability seam
hydraulic pressure cracking
blast cracking
