Journal
ENGINEERING GEOLOGY
Volume 220, Issue -, Pages 266-273Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.enggeo.2017.02.016
Keywords
Rock-like material; Spherical charge explosion; Explosion crater; Static stress
Funding
- State Key Research Development Program of China [2016YFC0600706, 2016YFC0801605]
- National Natural Science Foundation of China [51674061]
- Fundamental Research Funds for the Central Universities [150104004]
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Theoretical analysis and laboratory tests were performed to investigate the fragmentation of rock-like materials under coupled static stress and spherical charge explosion. The variations of the explosion crater shape and volume were studied. The experimental results indicate that uniaxial static stress changes the shape of the explosion crater at the free surface from circular to elliptical and increases the volume of the explosion crater. In addition, a higher material strength corresponds to a smaller explosion crater volume. Under biaxial equal stress condition, the failure zone on the free surface is always circular and the volume of the explosion crater decreases and subsequently increases. The influence mechanisms of static stress on the explosion crater are discussed in detail, and the experimental phenomena are well explained. (C) 2017 Elsevier B.V. All rights reserved.
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