Incremental explosive energy distribution in blasting design |
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| Authors: | Geoffrey D Just |
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| Institution: | (1) Department of Mining and Metallurgical Engineering, University of Queensland, 4069, Queensland, Australia |
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| Abstract: | Summary The increasing range of explosive types and methods of initiation available to the blasting design engineer, and the possibilities of obtaining more detailed rock property data, require improvements in the precision of blasting design methods. Average design values, such as powder factor and specific charge, have little significance where rock properties vary in any lithological section of the blast. Application of the concept of incremental explosive energy distribution will increase the design sensitivity and control over blastability variations. In this paper the use of this concept is described for different levels of complexity. These range from the simple allocation of explosive energy for large rock sections, to the use of more complex energy attentuation functions to allocate incremental specific energy levels. Procedures to develop rock fragmentation predictions from such data are also outlined. |
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| Keywords: | Blasting design mining design rock excavation rock fragmentation |
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