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针对某矿山在采用分段空场嗣后充填法二步骤回采铜金矿体过程中存在的矿体累积损伤情况，采用声波检测技术对采场爆破前以及爆破回采过程中的矿体进行声波数据采集，并利用矿体完整性系数结合FLAC3D软件对采场回采过程进行数值模拟分析。结果表明：采场爆破回采前，矿体完整性属于Ⅲ级，经过3～4次爆破回采后，距离爆源4排(8.8 m)范围内的采场矿体累积损伤程度较大，完整性由Ⅲ级变为Ⅴ级；采场前区和采场后区的应力安全系数均大于1.5,表明顶板和充填体整体稳定；采场后区回采后，空区顶底板及两端围岩和侧帮充填体塑性变形区域显著扩大，建议回采后及时充填，以降低围岩和充填体垮落的风险。
Abstract：In response to the cumulative damage of rock mass during the two-step mining of copper-gold ore body using the sub-level stoping with delayed backfill method in a mine, acoustic wave detection technology was used to collect acoustic wave data of the ore body before blasting and during the blasting and mining process, and the ore body integrity coefficient results were combined with FLAC3D software to conduct numerical simulation analysis of the mining process. The results show that the ore body integrity is at level Ⅲ before blasting and mining. After 3 to 4 rounds of blasting and mining operations, the cumulative damage degree of the ore body within a range of 4 rows(8.8 m) from the blast source is relatively large, and the integrity changes from level Ⅲ to level Ⅴ. The stress safety factors of the front and rear areas of the stope are both greater than 1.5, indicating that the roof and the filling body are overall stable. After the mining of the rear area of the stope, the plastic deformation areas of the roof and floor of the voids, as well as the surrounding rock and side wall filling body, significantly expand. It is recommended to backfill as soon as possible after mining to reduce the risk of collapse of the surrounding rock and the filling body.
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基本信息:
DOI：10.13426/j.cnki.yky.2025.02.01
中图分类号:TD853.34
引用信息:
[1]陈志强,张玉健,赵一博.某矿山铜金矿体二步采场待采矿体累积损伤研究[J].铀矿冶,2025,44(04):42-50.DOI:10.13426/j.cnki.yky.2025.02.01.
基金信息: