摘要
在新汶矿区地应力测试结果的基础上,分析了深部高应力岩巷快速钻爆施工的难点。基于现代爆破理论、断裂力学、岩体力学,通过实施技术创新,采用CMJ17A全液压凿岩钻车代替传统风钻,提出新型岩石定向断裂控制爆破技术、双空孔楔形-筒形复式掏槽技术,形成了一套深部高应力坚硬围岩巷道快速钻爆新技术。工程实践应用表明,该套快速钻爆新技术,可大大减少钻孔数量以及支护和爆破材料消耗,提高炮眼利用率,改善巷道成形效果和围岩稳定性,提高循环进尺和掘进效率,实现平均月进尺122 m,最高月进尺155 m,达到了深部高应力岩巷"长进尺、高效率、弱扰动、少欠挖、小超挖"的快速钻爆施工目的。
Based on test results of ground stress in Xinwen mining area,the difficulty of fast drilling and blasting for deep high stress rock roadway was analyzed.Using modern blasting theory,fracture mechanics and rock mechanics,according to implementing technology innovation,adopting CMJ17A full hydraulic drilling jumbo to replace traditional pneumatic drill,put forward new controlled blasting technology for rock directional fracture and wedge-cylinder compound cut technology in double empty holes,which formed a set of new fast blasting technology for deep high stress hard surrounding roadway.Application results show that the new fast drilling and blasting technology can greatly decrease drilling numbers and material consumption of supporting and blasting,enhance efficiency of borehole,improve formation quality of roadway and surrounding rock stability,enhance cyclical footage and drivage efficiency,realize average month drill footage at 122 meters and the maximum at 155 meters,which achieved that fast drilling and blasting construction aim of ＂long-footage,high-efficiency,weak-disturbance,less-undercut,small-overcut＂ in deep high stress rock roadway.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2011年第1期43-48,共6页
Journal of China Coal Society
基金
中国矿业大学青年科研基金项目(2009A001)
煤炭资源与安全开采国家重点实验室自主研究课题(SKLCRSM08X02)
关键词
高应力
岩巷
快速钻爆
定向断裂
复式掏槽
high stress
rock roadway
fast drilling and blasting
directional fracture
compound cut
