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Authors
Affiliations
1 School of Civil and Environmental Engineering, University of Science and Technology, Beijing-100083, CN
2 Jiangxi Key Laboratory of Mining Engineering, School of Resources and Environment Engineering, Jiangxi University of Science and Technology, Ganzhou Jiangxi-341000, CN
3 Guizhou Xinlian Blasting Engineering Group Co Ltd, Guiyang Guizhou-550002, CN
Source
International Journal of Earth Sciences and Engineering, Vol 9, No 2 (2016), Pagination: 711-716
Abstract
The fractures in rock influence propagation behavior of blasting waves and then it may result in higher blasting boulder yield and affect blasting result. According to the character of rock with closed macro fractures, the features of stress wave propagation in the rock with one inclined fracture, two parallel fractures and two crossed fractures were studied. The numerical models were established in 3DEC combined with LS-DYNA. The explosion wave was simulated by LS-DYNA and transformed into data form readable for 3DEC. Then the propagation behavior of blasting wave was calculated by 3DEC. The computation results show that the stress wave distributed differently in rock with different fractures. Comparing with intact rock, fractures can divide the stress region into parts. The minimum principal stress reduced quickly with the number of fractures increasing. In rock with two crossed fractures, the value of tensile stress near the blasthole reduced about 30 percent.
Keywords
3DEC, LS-DYNA, Wave Propagation, Fractures, Stress Distribution.
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