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Effect of Tamping Materials on the External Charge Blasting of Structural Members  

Yang, Hyung-Sik (전남대학교)
Kim, Jung-Gyu (전남대학교)
Ko, Young-Hoon (전남대학교)
Rai, Piyush (전남대학교)
Publication Information
Explosives and Blasting / v.31, no.1, 2013 , pp. 49-54 More about this Journal
Abstract
External charges with four different kinds of tamping materials are tested to determine the effect of tamping on the blasting of steel components and concrete blocks. The tamping materials used are tamping cap, urethane foam, sand bag and mud. As a result, the tamping cap, urethane foam, and sand bag show no significant effect of tamping. But the mud tamping shows that the charge amount can be reduced by more than 20% in completely cutting the structural components. In addition, it is found from the test that the standard equation for calculating the proper charge is rather conservative, which means the equation overestimates the necessary charge for the blasting.
Keywords
Steel member; Concrete member; External charge blasting; Tamping effect; Mud;
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  • Reference
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