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Strategic Study of CAE >> 2014, Volume 16, Issue 11

Numerical simulation of blasting effect with divided charge structure

1. Faculty of Land Resource Engineering,Kunming University of Science and Technology,Kunming 650093,China ;

2. Yunnan Minbao-Kungong Blasting Engineering Co. Ltd.,Kunming 650093,China;

3. Faculty of Metallurgy and Mining Engineering,Kunming Metallurgy College,Kunming 650033,China

Funding project:国家自然科学基金项目(51304087);云南省基金项目(KKSY201404056,KKSA201121083) Received: 2014-09-01 Available online: 2014-11-21 10:48:00.000

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Abstract

This paper numerically simulates the stress development and generates a three-dimensional model of the medium-deep hole blasting in infinite rock mass for continuous charge and divided charge in blasting by using the large-scale nonlinear dynamic analysis software LS-DYNA and the elastic-plastic model *MAT_PLASTIC_KINEMATIC and JWO-EOS. The difference of the decreasing rate in Von Mises effective stress of blasting, element effective stress peak in free face, the bore wall stress and acceleration are investigated. It is shown that divided charge could greatly improve the blasting effect by engineering blasting practice.

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