›› 2009, Vol. 30 ›› Issue (S1): 1-4.

• Fundamental Theroy and Experimental Research •     Next Articles

Features and physical mechanism of fragmentation distribution of rock under explosion

QI Cheng-zhi 1, 2, WANG Ming-yang2, QIAN Qi-hu2, LUO Jian1   

  1. 1. School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China; 2. Engineering Institute of Cops of Engineers, PLA University of Science and Technology, Nanjing, 210007, China
  • Received:2008-04-18 Online:2009-08-10 Published:2011-03-16

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Abstract:

Physical mechanism of fragmentation distribution of rock mass under explosion is investigated. It is demonstrated that lognormal distribution is closely related to the multi-fold fracture of the material. In the case of contained explosion, lognormal distribution describes the fragmentation distribution of rock in the vicinity of explosion center where the material is under hydrostatic compression, the strain rate is high, and the fracture is multi-fold. While Rosin-Rammler distribution mainly describes the fragmentation distribution of rock mass beyond the vicinity of explosion center where the fracture is induced mainly by the tangential tensile stress, and the fracture is one-fold.

Key words: fragmentation distribution, onefold fracture, multi-fold fracture

CLC Number: 

  • O 212.2
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