Numerical study on fracture control blasting using air–water coupling

Abstract Fracture control blasting produces rock fractures in the desired direction, which is significant for stability of excavation structures engineering. The present study proposes a new method fracture using air–water coupling. This utilizes difference explosion stress transfer between air and water, guides energy consumption fracturing on water-coupling side, i.e. zone, thus zone properly fragmented, reserved well protected from damage. Based plane strain assumption, transmission propagation with this are first theoretically analyzed. Then, coupling numerically studied utilizing LS-DYNA program. numerical model developed calibrated simulation laboratory-scale air-coupling tests. successive processes pressure attenuation, evolution under investigated. Thereafter, effects ratio decoupling performance theoretical results show that good can be obtained blasting.