摘要
为解决平煤二矿煤层顶板坚硬而导致回采巷道围岩较难控制的问题,采用D型聚能管定向断裂爆破技术,通过理论分析定向断裂爆破技术原理、现场试验、钻孔窥视等手段,研究了D型聚能管定向断裂爆破技术对控制沿空留巷围岩变形中的积极作用,确定了平煤二矿沿空留巷中合理的爆破、装药等工艺参数,并进行了现场工业性试验。结果表明:采用D型聚能管定向断裂爆破技术可以达到定向爆破的目的,切顶预裂成缝效果良好,能够有效切断沿空留巷中的基本顶,提高巷道自身的承载力,保障动压影响期间留巷围岩稳定,提高沿空留巷支护的可靠性和安全程度,有利于安全生产,对于同类条件下矿井聚能预裂爆破参数的选择有一定的工程参考价值。
As the hard coal seam roof in Pingmei No. 2 Coal Mine makes it difficult to control the mining roadway surrounding rock,the directional fracture blasting technology of D-shaped energy-gathering pipe is applied in gob-side retaining. Through theoretical analysis of the technical principle of directional fracture blasting,field test and borehole peeping,the positive effect of D-shaped energy-gathering pipe directional fracture blasting on surrounding rock deformation control in gob-side retaining is analyzed. The reasonable blasting and charging parameters are determined,and the field industrial test is carried out. The test results show that the directional blasting can be achieved using D-shaped energy-gathering pipe directional fracture blasting technology. The effect of roof pre-splitting is good,the basic roof is efficiently cut off in gob-side retaining,and the roadway bearing capacity is enhanced,ensuring the surrounding rock stability under dynamic pressure,and the support’s reliability and safety degree is significantly improved for gob-side retaining.
作者
杨战标
赵万里
丁坤朋
张广杰
YANG Zhan-biao;ZHAO Wan-li;DING Kun-peng;ZHANG Guang-jie(State Key Laboratory of Coking Coal Exploitation and Comprehensive Utilization,China Pingmei Shenma Group,Pingdingshan 467000,China;Institute of Energy and Chemical Engineering,China Pingmei Shenma Group,Pingdingshan 467000,China;Henan Institute of Technology,Henan Polytechnic University,Jiaozuo 454003,China)
出处
《煤炭工程》
北大核心
2020年第11期52-56,共5页
Coal Engineering
关键词
定向爆破
沿空留巷
巷道围岩
D型聚能管
动压
directional blasting
gob-side entry retaining
roadway surrounding rock
D-shaped energy-gathering pipe
dynamic pressure
