›› 2006, Vol. 27 ›› Issue (5): 735-739.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Distribution of explosive energy consumed by column charge in rock

WU Liang1, LU Wen-bo1, ZONG Qi2   

  1. 1. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China; 2.Department of Civil Engineering, Anhui University of Science and Technology, Huainan 232001, China
  • Received:2004-08-23 Online:2006-05-10 Published:2013-11-05

Abstract: The explosive energy of charge in rock is composed of shock wave energy and gaseous explosive energy. Analysis of the distribution of explosive energy can help to improve the blasting effect and blasting performance. During coupling column blasting, the features of deformation and destruction of rock by shock wave, the explosion of cavity by detonation gas, and moving of cracks by the detonation gas with considering advance damage are analyzed. The result calculated for several rocks shows that the shock wave energy consumed makes up about 40% of the total energy of the charge. The energy consumption in the course of the cavity and main cracks expansion accounts for about 23% of the total blasting energy. The spare energy among which most is consumed to increase the amount of cracks is lost.

Key words: rock blasting, column charge, explosion energy, shock wave

CLC Number: 

  • TU 457
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
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