›› 2005, Vol. 26 ›› Issue (3): 479-483.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Experimental and theoretical study of parallel hole cut blasting with cavity

LIN Da-neng1, 2, CHEN Shou-ru2   

  1. 1.School of Resource and Safety Engineering, Center South University, Changsha 410083, China; 2. School of Energy and Safety Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
  • Received:2003-12-10 Online:2005-03-10 Published:2013-11-21

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Abstract: The physical behavior of cut holes in the course of forming empty space was analyzed; and the mechanic model of empty space’s formation was established based on the typical borehole distribution in parallel cut blasting with cavity. The movement behavior of fragment pieces of rock in space was studied. The principle of the sizes of empty space resulted from cut blasting with cavity was put forward; and the related calculation method was given, of which the results coincide with the results of 48 trials in a coal mine. The research results show that the ratio of fragment pieces thrown out of space is relevant to the characteristic of explosive, parameters of rock and types of charge structure.

Key words: blasting dynamics, parallel cut, empty space, experimental analysis

CLC Number: 

  • TD 236
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