近距离突出煤层群开采预抽煤巷条带瓦斯研究

Study on Pre-drainage Coal Roadway Bands Gas Technology in Contiguous Outburst Seams Group

近距离突出煤层群采动影响下的邻近层瓦斯涌出治理困难,根据矿井实际情况以及相似矿区的瓦斯治理方式,确定煤巷条带瓦斯预抽方案以及上下煤组瓦斯抽采巷合理层位和位置,采用水力压裂强化抽采效果,确定合理的抽采时间为12个月,预抽钻孔间排距均为5 m。相似地质条件的矿区实践证明,该抽采方法合理有效,能够有效解决瓦斯涌出问题,为矿井瓦斯抽放提供必要的技术指导。

For the difficulty of adjacent gas control under the mining influence of the contiguous outburst seams group,according to the real situation of coal mine and the gas control way in similar coal mine,the scheme of pre-drainage coal roadway bands gas was put forward in the paper,reasonable layer and position of the gas drainage lane were also determined,hydraulic fracturing technique was used to improve gas extraction effect,too,and it was determined that reasonable extraction time is 12 month and the distances between bores is 5 m × 5 m. The practices of similar coal mine have proved that this extraction method is reasonable and effective,and can solve the problem of gas emission effectively,provide necessary technical guidance for the gas drainage.