Development status and application prospects of open-pit mine cast blasting technology

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Journal of Vibration and Shock ›› 2025, Vol. 44 ›› Issue (13) : 64-78.

SHOCK AND EXPLOSION

Development status and application prospects of open-pit mine cast blasting technology

ZHANG Zhao, ZHANG Ruixin*, FU Shigen, FU Botao, WANG Youpai

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Abstract

Because of the large scale of the project, high efficiency, and to a certain extent can save the production cost of mining and stripping, cast blasting has been favored by the open pit mining industry in the United States, Australia and other developed countries. By combing and analyzing the development history of cast blasting technology in open-pit mines at home and abroad, the production characteristics of cast blasting technology are defined. The factors influencing the blasting quality in open-pit coal mine are analyzed from the aspects of strong controllable, weak controllable and uncontrollable, and the applicability conditions of the cast blasting technology in open-pit mining are also analyzed. Based on the theory of plane charge method and blasting seismic effect, the rock blasting mechanism of blasting technology is deeply analyzed, the four stages of rock throwing after explosive initiation and the evolution characteristics of rock strata are defined, and the seismic response characteristics of blasting technology are analyzed and summarized. Taking Heidaigou open-pit mine as an example, the application status of cast blasting technology is described in detail, the operation flow of cast blasting technology application is systematically analyzed, the internal structure and operation mechanism of cast blasting and dragline stripping technology is analyzed, and the bottleneck problems existing in the application of cast blasting technology are analyzed and summarized. Aiming at the intelligent transformation and upgrading of projectile blasting technology, the whole system process of cast blasting engineering, such as transparent geological information, intelligent blasting design, fine blasting construction, informatization of safety management, and precision blasting effect, is analyzed and refined respectively, from the aspects of disciplinary support, technical support and problems to be solved. The knowledge system and intelligent system architecture of cast blasting technology are constructed, the research trend of cast blasting technology in the future is proposed, and the applicability of cast blasting technology in other open-pit coal mines in china is analyzed. The research results can provide reference and basis for the upgrading and transformation of blasting engineering technology in other industries.

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open-pit mine / cast blasting / dragline stripping technology / intelligent blasting / application prospect

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ZHANG Zhao, ZHANG Ruixin, FU Shigen, FU Botao, WANG Youpai. Development status and application prospects of open-pit mine cast blasting technology[J]. Journal of Vibration and Shock, 2025, 44(13): 64-78

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