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Case study of microseismic tomography and multi-parameter characteristics under mining disturbances

采矿扰动下层析成像及微震多参数特征实例研究

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Abstract

Rockburst caused by mining disturbance may cause rock damage. Combining the microseismic (MS) multiparameter, high-magnitude MS event distribution, and MS tomography may be an effective method for hazard precursor identification in underground mining. Firstly, a self-developed MS monitoring system was built in an underground mine in Shaanxi, China. Then, based on the tomography results, a correlation model was established between velocity anomalies and mining activity regions, and rockburst risk areas were delineated. Furthermore, multi-parameters were analyzed, including b value (rock fracture parameter), S value (MS activity), tomography results, high-magnitude MS event distribution and the in-site survey in 795 and 860 levels of Shaanxi Zhen-ao Mine. Ultimately, based on the rockburst case on June 7 and the multi-parameters analysis of 795 level to 860 level of Zhen-ao Mine, the risk areas were identified. MS information can be used as an early warning identification of hazards, and has a wide application in the future.

摘要

采矿活动诱发的岩爆可引起矿区内强烈的振动和严重的岩石破坏。结合微震多参数、大震级事 件分布与层析成像特征综合井下分析, 综合为一种较好的预警方法。首先, 在中国陕西某地下矿山建 立了自主研发的微震监测系统。然后, 根据层析成像计算结果得出了波速场异常与采矿活动区的关联 模型, 初步确定了可能存在风险的区域与采矿活动的特征。此外, 对b 值、S 值、成像结果、大震级微 震事件分布及陕西矿区795 和860 水平现场调查情况等多个因素进行了分析。根据该矿山6 月7 日岩爆 案例, 将795 至860 水平现场的多个区域进行对比分析, 从工程角度发现了潜在的不安全区域, 对安 全施工管理提供了参考。微震监测系统可作为一个危险预警的手段, 具有广泛的应用前景。

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Authors and Affiliations

  1. School of Resources and Safety Engineering, Central South University, Changsha, 410083, China

    Long-jun Dong  (董陇军), Xian-hang Yan  (闫先航), Jian Wang  (王剑) & Zheng Tang  (唐正)

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  1. Long-jun Dong  (董陇军)
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  2. Xian-hang Yan  (闫先航)
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Contributions

DONG Long-jun provided the concept and edited the draft of manuscript. YAN Xian-hang conducted the literature review and wrote the first draft of the manuscript. WANG Jian and TANG Zheng edited the draft of manuscript.

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Correspondence to Long-jun Dong  (董陇军).

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DONG Long-jun, YAN Xian-hang, WANG Jian, and TANG Zheng declare that they have no conflict of interest.

Additional information

Foundation item: Project(2021YFC2900500) supported by the National Research and Development Program of China; Project (52161135301) supported by the International Cooperation and Exchange of the National Natural Science Foundation of China

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Dong, Lj., Yan, Xh., Wang, J. et al. Case study of microseismic tomography and multi-parameter characteristics under mining disturbances. J. Cent. South Univ. 30, 2252–2265 (2023). https://doi.org/10.1007/s11771-023-5358-9

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