Fracture Controlled Blasting of Different Coupling Mediums in Bore Hole
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摘要: 利用空气和水不同的物理和传能特性,在同一炮孔内采用不同介质(水和空气)进行偶合爆破,以控制爆炸能量的释放过程及作用方向,从而控制裂缝的产生和发展.分析了水和空气偶合装药爆破对周围介质的影响,并对不同介质的爆破效果进行了模拟试验.结果表明,水偶合装药爆破比空气偶合装药爆破产生的应变和损伤度大,从而起到崩落一侧围岩而保护另一侧围岩的作用.Abstract: Based on the different physical and energy transfer characteristics of water and air,coupling blasting of different mediums (water and air) in the same bore hole was presented to control the release process and action direction of energy to control the generation and development of cracks.The effect of water and air coupling blasting on surrounding medium was analyzed,and strain and damage induced by coupling blasting of water and air were investigated experimentally.The research results show that water coupling blasting can generate great strain and damage than air coupling blasting,as a result,it is possible to destroy one side of surrounding rock and protect the other side.
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Key words:
- hydraulic blasting /
- cracking mechanism /
- energy release /
- strain gauge /
- crack expansion
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张志呈.定向断裂控制爆破[M].重庆:重庆大学出版社,2000:257-274.[2] 张奇.工程爆破动力学分析及其应用[M].北京:煤炭工业出版社,1998:65-98.[3] 孙家亮.水介质不偶合装药孔壁压力初探[J].煤矿爆破,1996,27(4):72-77.SUN Jjialiang.Study in the hole pressure about hydraulic decoupling blasting[J].Mining Blasting,1996,27(4):72-77.[4] 李翼祺,马素贞.爆炸力学[M].北京:科学出版社,1992:199-204.[5] SEAMEN L,CURRAN D R.Computational models for ductile and brittle fracture[J].Apple.Phys.,1976,47(11):4 814-4 826.[6] 曹孝君,张继春.浅埋隧道掘进爆破地表振动效应数值模拟[J].西南交通大学学报,2006,41(6):680-684.CAO Xiaojun,ZHANG Jichun.Numerical simulation of ground vibration effects in shallow tunneling blasting[J].Journal of Southwest Jiaotong University,2006,41(6):680-684.[7] GRADE D E,KIPP M E.Continum modeling of explosive fracture in oil shale[J].Int.J.Rock.Mech.Sci.,1980,17(6):147-157.[8] 余天庆,钱济成.损伤理论及其应用[M].北京:国防工业出版社,1998:146-250. -
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