摘要
针对采煤工作面开采路径中存在坚硬岩石断层、采煤机直接破碎岩石效率较低的问题,采用自制远距离传爆水胶药柱,通过数值模拟分析,设计合理的爆破参数,进行深孔预裂爆破。结果表明,该药柱远距离传爆性能可靠,当爆破孔孔径为75mm,装药直径为63mm时,破碎半径为0.4～0.5m,裂隙半径为0.5～1.0m。当相邻两炮孔之间的距离为1.6～2.2m时,深孔爆破后岩石中的损伤裂纹扩展,达到了采煤机破碎岩石的要求,为综采工作面顺利通过硬岩断层提供了保证。
Aimed to the hard rock fault in rock path of the coal working faces and the low efficiency of rock breaking directly by coal cutter,the long-hole presplitting blast is done by self-made water-gel explosive grain of long-range booster,numerical simulation and design of reasonable blasting parameters.The results show that the long-range booster water-gel explosive has high reliability and when the blasting hole diameter is 75 mm,the diameter of charge is 63 mm,the radius of crushing zone is 0.4-0.5m and the radius of cracks is 0.5-1.0 m.When the distance between neighboring blasting hole is about 1.6-2.2 m,the damage cracks are future extended after long-hole blasting,it satisfies the requirement of rock breaking used by coal cutter,which ensures that the fully mechanized coal face passes through the hard fault of rock successfully.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第7期102-107,共6页
Journal of Chongqing University
基金
国家自然科学基金资助项目(51204007
51274009)
安徽省高等学校省级自然科学重点项目(KJ2013A102)
安徽省自然科学基金项目(1208085QE85)
关键词
深孔预裂爆破
断层
硬岩
水胶药柱
爆破参数设计
long-hole presplitting blast
fault
hard rock
water-gel explosive grain
design of blasting parameters
