煤体损伤与采动瓦斯抽放

Coal body failure and mining gas drainage

钻孔抽放是煤矿瓦斯治理的主要措施之一 ,但对于透气性较差的煤层 ,采用常规钻孔抽取的方法效果较差。实践证明 ,当煤层进行开采时 ,受到采动影响 (即应力状态改变 )的煤层 ,其内部节理、裂隙的产状要素发生显著改变 ,瓦斯的赋存状态发生相应变化 ,抽排效果显著改变。本文主要研究采用长壁开采方法时 ,煤体损伤规律与瓦斯抽取效果的关系。

a borehole drainage is one of the main measures for mine gas control. The results of the conventional borehole drainage method is poor in seams with a poor penetration. The practices showed that when the seams were under mining operation, in the seams under the influences of the mining operation ( the stress status changed), there were obvious changes occurred in the joints, cracking and others. The storage condition of the methane would change relatively. The gas drainage results will be obviously improved. The paper mainly studied the relationship between the coal body failure and gas drainage result for a longwall coal mining face.