›› 2011, Vol. 32 ›› Issue (12): 3773-3779.

• Numerical Analysis • Previous Articles     Next Articles

Attenuation effects of cavity shape on blast wave in underground defense layer

MU Chao-min1, 2, QI Juan3   

  1. 1. School of Energy Resources and Safety, Anhui University of Science and Technology, Huainan, Anhui 232001, China; 2. Key Laboratory of Mining Coal Safety and Efficiently Constructed by Anhui Province and Ministry of Education, Anhui University of Science and Technology, Huainan, Anhui 232001, China; 3. Center of Modern Educational Technology, Anhui University of Science and Technology, Huainan, Anhui 232001, China
  • Received:2010-07-01 Online:2011-12-10 Published:2011-12-13

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Abstract: Based on anti-explosion engineering of surrounding rock, with the method of little charge model test and numerical simulation, by changing the location, shape, and combination form of cavities, the attenuation and screening effects of defense layer with cavities on planar and spherical blast waves are studied. The results show that defense layer with cavities can weaken peak pressure of blast waves greatly and protect the underground structure. The attenuation effect of staggered cavities on peak value of blast pressure is better than ordered queue cavities obviously; and the attenuation effect of rectangular cavities on blast pressure is better than circular cavities. The results can provide references for new-type anti-explosion technique of surrounding rock.

Key words: mechanics of explosion, blast wave, cavity, anti-explosion design

CLC Number: 

  • O 383+1
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