School of Resources and Safety Engineering,China University of Mining and Technology (Beiing) No. 10
Mine, Pingdingshan TianDan Coal Corporation Ltd.

为有效提高低透气性煤层瓦斯抽采率,基于平煤十矿矿井瓦斯地质条件,以戊8.9-20230工作面为例,试验了煤层深孔聚能爆破增透技术,并进行增透效果考察。结果表明:深孔聚能爆破增透后,单孔抽采瓦斯体积分数为爆破前的1.55~2.72倍,爆破影响区抽采瓦斯体积分数增幅达37.64%;而且随着爆破作用次数和装药长度的增加,爆破影响区瓦斯抽采效果更加显著。

In order to improve gas drainage rate of low permeability coal seam,based on the gas geological conditions of Pingmei No.10Mine,permeability improve d technology with deep borehole energy accumulation blasting in coal seam was tested in No. Wu8. 9-20230working face. The coal seam permeability improvement effe ct was studied. The results showed that after carrying out the permeability improved technology with deep borehole energy accumulation blasting,gas drainage density of single borehole was 1. 55 ~ 2. 72 times of that before blasting,and gas drainage density in blasting influence area increased by 37.64%. Furthermore,with the increa se of blasting times and explosive charge length,gas drainage effect in blasting influence area was more obvious.

国家自然科学基金资助项目(41072118)；