摘要
针对低透气煤层聚能爆破增透技术参数问题,在装药直径一定的条件下,设计了不同装药系数和爆破间距的爆破孔并进行现场试验,对比分析爆破前后爆破影响区瓦斯纯量变化,考察了爆破参数对煤层增透效果的影响.结果表明,通过控制爆破孔径向装药不耦合系数、轴向装药长度、封孔可靠性和爆破作用次数等因素可提高煤层增透效果.
In view of the technical parameters of cumulative blasting to improve the permeability of coal seams with low permeability, under the condition of constant charge diameter, blast holes were designed with different charge coefficients and blast spacings, and then field test was carried out. The variation of gas drainage pure quantity before and after blasting was comparatively analyzed in blasting influence area, and the influence of blasting parameters on the permeability-increasing effect of coal seams was investigated on the basis of experimental data. It is shown that the permeability-increasing effect of coal seams can be improved by controlling blast-hole radial charge decoupling coefficient, axial charge length, sealing reliability, and blasting times.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
2013年第12期1533-1537,共5页
Journal of University of Science and Technology Beijing
基金
国家自然科学基金资助项目(41072118)
关键词
煤矿
瓦斯抽放
聚能爆破
煤层
透气性
技术参数
coal mines
gas drainage
cumulative blasting
coal seams
permeability
technical parameters
