某深井矿山开采岩爆倾向性研究
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1.东北大学(1210000046300354XU 2.)

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国家重点研发计划课题(2023YFC2907204).


Study on the Tendency of Rock Burst during Mining in a Deep Mine
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Northeastern University

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    摘要:

    我国多座矿山进入深井开采行列,岩爆问题越发突出,通过岩爆问题的研究,预测岩爆发生的可能性和强度等。以某深井矿山为研究对象,在矿区地应力分布特征和岩石力学试验基础上,采用岩爆经验判据准则和数字模拟分析对岩爆进行分析研究。通过经验判据中的Barton判据和冲击能量指标进行初步定性分析,得出-1300m以上中段岩爆倾向性极低;如果发生,将会在局部产生轻微岩爆;-1300m以下中段,将会发生轻微~中等等级岩爆。通过局部能量释放率指标进行建模分析,得出在开采该矿山一期(-780~-1020m)开采过程中,岩爆风险性不高,以轻微岩爆为主;在二期(-1020~-1754m)开采过程中,矿体具有中等岩爆的风险,其中采场顶板、间柱与底板的边角处是发生岩爆的潜在区域。该研究对该矿山下一阶段的施工和开采具有指导意义。

    Abstract:

    Multiple mines in our country have entered the ranks of deep mining. The problem of rockburst has become increasingly prominent. Through the study of rockburst problems, the possibility and intensity of rockburst occurrence can be predicted. Taking a deep mine as the research object, based on the distribution characteristics of geostress in the mining area and rock mechanics experiments, the empirical criteria and digital simulation analysis of rockburst were used to analyze and study the rockburst. Preliminary qualitative analysis was conducted using the Barton criterion and impact energy index in empirical criteria. It was found that the rock burst tendency in the middle section above -1300m is extremely low. If it occurs, a slight rockburst will occur locally. In the middle section below 1300m, there will be slight to moderate level rockburst. By modeling and analyzing the local energy release rate index, it was found that during the mining process of the first phase (-780~-1020m) of the mine, the risk of rockburst was not high, with minor rockburst being the main type. During the second phase (-1020~-1754m) mining process, the ore body has a moderate risk of rockburst, with the potential areas for rockburst occurring at the corners of the roof, pillars, and floor of the mining area. This study has guiding significance for the next stage of construction and mining in the mine.

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  • 收稿日期:2024-05-07
  • 最后修改日期:2024-07-02
  • 录用日期:2024-07-03
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