摘要
针对坚硬难垮落顶板控制问题,以通化矿业(集团)有限责任公司松树镇煤矿为例,根据聚能流侵彻、应力波拉伸和爆生气体气楔作用定向切割使顶板弱化的原理,在分析聚能爆破裂隙起裂扩展条件基础上,设计了深孔聚能爆破顶板弱化方案,并结合现场条件对爆破孔参数进行优化。试验结果表明,聚能爆破弱化了坚硬顶板,缩小了回采工作面初次来压步距,使顶板冒落面积减少近30%,为解决采空区顶板大面积悬顶提供了技术途径。
In view of the hard and stable roof control problems, take Songshuzhen Coat Mine oI tongnua ：,, （Group） Co. , Ltd. for example. According to the directional cut roof weakening principle under the effect of cumula tive jet penetration, stress wave tension and explosive gas wedge, based on the analysis of cumulative blasting frac tures＇ initiation and extension conditions, roof weakening scheme of deephole cumulative blasting was designed and blast hole parameters were optimized combined with field conditions. The experiment results show that cumulative blas ting weakens the hard roof, reduces stope face first weighting interval and roof caving area which decreased by about 30%, and provides a technological approach to solve large area hanging roof in golf.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2013年第7期1149-1153,共5页
Journal of China Coal Society
基金
国家自然科学基金资助项目(41072118)
关键词
聚能爆破
顶板弱化
致裂机理
爆破参数
cumulative blasting
roof weakening
splitting mechanism
blasting parameter
