2006, Volume 8, Issue 6
Strategic Study of CAE >> 2006, Volume 8, Issue 6
Study on Cumulalive Energy Effect in Directional Fracture Controlled Blasting in Rock
Department of Modem Mechanics, University of Science and Technology of China, Hefei 230026, China
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Abstract
In order to solve the problems of stone exploitation, the mechanism of crack initiation and its expansion of directional fracture controlled blasting with linear cavity effect cutter in rock were roughly studied based on the theories of cumulative energy effect, mechanics of explosive and rock fracture mechanics, then the blasting parameters were designed and tested by model test in laboratory and field. The experimental results show that the energy from blasting can be directionally concentrated by the cumulative energy jet. The directional expansion of crack is satisfactory. Model test and field test suggest that the directional fracture controlled blasting with linear cavity effect cutter is a good means in excavating tunnels or cutting rock. It points out that the prospect of this method is promising. All these will give beneficial references to related theoretical study and field application.
Keywords
cumulative energy effect ; directional fracture controlled blasting ; model test ; liner ; fracture
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