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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