Journal
ENGINEERING OPTIMIZATION
Volume 50, Issue 12, Pages 2177-2191Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/0305215X.2018.1439943
Keywords
Large-diameter longhole blasting; interval charging; charge structure optimization; cylindrical charge
Funding
- National Key Research and Development Program of China of China [2017YFC0602902]
- Shenghua Lieying Program of Central South University
- Fundamental Research Funds for the Central Universities of Central South University [2017zzts567]
- China Postdoctoral Science Foundation [2017M622610]
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The charge structure is an important factor in the adjustment of the energy distribution of explosives and the control of the blasting effect, especially in an underground large-diameter longhole, for interval charge millisecond blasting design. To achieve a reasonable charge structure, a multi-planar detection optimization (MDO) algorithm for charge structures is proposed based on the Harries mathematical model and the superposition method. The vector size of a fragment is transformed into a scalar ruler, and the definition of the spatial non-uniformity evaluation factor is used in the MDO algorithm. A detailed methodology is implemented using a Visual LISP program and validated for a case study of the Fankou lead-zinc mine in China. The results reveal that the MDO algorithm can improve the rock fragmentation and increase the energy utilization rate of explosives in large-diameter longhole blasting operations. This algorithm could be extremely helpful in the process of underground mine blast optimization.
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