Damage distribution characteristics and space optimizations of the large-diameter deep multi-holes blasting in thick ore bodies

IF 6.7 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Tunnelling and Underground Space Technology Pub Date : 2024-11-30 DOI:10.1016/j.tust.2024.106264

Huang Linqi , Wang Zhaowei , Liu Kai , Liu Huilin , Li MingJie , Shen Huiming , Li Xibing

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Abstract

As a crucial method for mining thick ore bodies, deep-hole blasting provides high production efficiency and low explosive consumption. Its effectiveness is heavily dependent on the optimization of blasting parameters. To refine these parameters, single hole and variable hole spacing multi hole blasting crater tests were conducted in mine tunnels with rock masses exhibiting varying degrees of joint fissure development. The parameters derived from these tests were validated using LS-DYNA numerical simulation software, incorporating field conditions into the analysis. By examining the blasting process, fragment size, damage distribution, and crater test results, the optimal blasting parameters were identified: a blasthole spacing of 1.8 m and a row spacing of 1.7 m. The functional relationship between the specific charge control area and the percentage of various damage distributions has been established, providing the optimal percentage for different damage ranges. These optimized parameters were subsequently applied in field deep-hole blasting tests, which successfully reduced the boulder ratio and enhanced blasting efficiency. This study provides valuable parameters for large-diameter deep-hole blasting in mining and significantly improves the construction efficiency of underground space projects.

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来源期刊

Tunnelling and Underground Space Technology 工程技术-工程：土木

CiteScore

11.90

自引率

18.80%

发文量

454

审稿时长

10.8 months

期刊介绍： Tunnelling and Underground Space Technology is an international journal which publishes authoritative articles encompassing the development of innovative uses of underground space and the results of high quality research into improved, more cost-effective techniques for the planning, geo-investigation, design, construction, operation and maintenance of underground and earth-sheltered structures. The journal provides an effective vehicle for the improved worldwide exchange of information on developments in underground technology - and the experience gained from its use - and is strongly committed to publishing papers on the interdisciplinary aspects of creating, planning, and regulating underground space.