鸡公岭磷矿岩爆倾向性评价研究

祝雨杭; 陈世万; 阮亮; 田云雷

doi:10.13928/j.cnki.wrahe.2025.06.019

水利水电技术（中英文） ›› 2025, Vol. 56 ›› Issue (6) : 227 -240. DOI: 10.13928/j.cnki.wrahe.2025.06.019

工程地质

鸡公岭磷矿岩爆倾向性评价研究

祝雨杭 ¹^,² ,
陈世万 ¹^,² ,
阮亮 ³ ,
田云雷 ¹^,²

作者信息 +

The rockburst tendency evaluation in Jigongling phosphate mine

Yuhang ZHU ¹^,² ,
Shiwan CHEN ¹^,² ,
Liang RUAN ³ ,
Yunlei TIAN ¹^,²

Author information +

文章历史 +

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摘要

【目的】随着深部矿山开采活动的增多，岩爆已成为威胁地下工程安全的主要隐患之一。为快速评价深部矿山岩爆倾向性，提出了一种新的评价方法。【方法】通过量化深部岩心的卸荷损伤特征来确定地应力方向，并结合变形率分析法(DRA)测定地应力大小，综合其他岩石力学参数对贵州省鸡公岭磷矿岩爆倾向性进行评价。【结果】研究结果表明：(1)深部岩心的波速和孔隙度因卸荷损伤呈现一致的正交各向异性，从而确定了水平主应力方向。(2)DRA试验结果表明，在728~1 076.2 m范围内，最小水平主应力为15.5~19.5 MPa,最大水平主应力为21.1~25.6 MPa。(3)基于DRA试验的弹性应变能指数W_et、脆性指数F、应力强度比R和岩体质量指标RQD,对深部矿岩开展了岩爆倾向性评价，该矿山岩爆倾向性主要为中等。【结论】该方法在矿山建设前期设计阶段可快速准确地测定地应力和岩爆评价关键参数，为评价矿山深部岩爆倾向性提供重要支撑。

Abstract

[Objective] With the increasing depth of mining activities, rockburst has become a major hazard threatening the safety of underground engineering. To quickly assess the rockburst tendency in deep mines, a new evaluation method is proposed. [Methods] The method determines the in-situ stress direction by quantifying the unloading-induced damage characteristics of deep rock cores and measures the stress magnitude using deformation rate analysis(DRA). It further integrates other rock mechanical parameters to evaluate the rockburst tendency in the Jigongling Phosphate Mine in Guizhou Province. [Results] The research results indicate that:(1) the wave velocity and porosity of deep rock cores exhibit consistent orthogonal anisotropy due to unloading damage, thus determining the direction of horizontal principal stress;(2) DRA test result show that within the depth range of 728 m to 1 076.2 m, the minimum horizontal principal stress is 15.5~19.5 MPa, and the maximum horizontal principal stress is 21.1~25.6 MPa;(3) based on the elastic strain energy index(W_et), brittleness index(F), stress intensity ratio(R), and rock mass quality index(RQD) obtained from DRA tests, the rockburst tendency of deep rock masses was evaluated, showing a predominantly moderate tendency. [Conclusion] The proposed method can quickly and accurately measure in-situ stress and key parameters for rockburst evaluation during the early design stages of mine construction, providing important support for assessing rockburst tendency in deep mines.