深部金矿岩爆倾向性对比分析研究

    Comparative analysis of rockburst propensity of deep gold ore

    • 摘要: 为探究深井矿山的岩爆倾向性特征,以姜家窑金矿为研究背景,采用空心包体应力解除法在现场开展地应力测量,获得矿区3个测点的三维应力状态。通过岩石试验,得到矿区各测点岩石的基本力学参数。利用弹性变形能指数法、岩石强度应力比法、Barton判据、应力集中系数法、Russenes判据和二郎山判据对矿区岩爆倾向性进行多重判据分析。将分析结果与现场实际情况对应,结果表明:Barton判据和岩石强度应力比法评价体系较为准确。利用这两种岩爆倾向性判据预测姜家窑矿区可能在埋深1 400~1 600 m开始出现比较明显的岩爆风险,为矿区后期深部开采提供科学依据和指导。

       

      Abstract: In order to investigate the characteristics of rockburst propensity in deep shaft mines, this paper takes Jiangjiayao Gold Mine as the research background and uses the hollow envelope stress relief method to carry out ground stress measurements at the site and obtain the three-dimensional stress state at three measurement points in the mine area.The basic mechanical parameters of the rocks at each measurement point in the mine area are obtained through rock tests.Multiple criterion analysis of the propensity of rock explosion in the mine area is carried out using the elastic deformation energy index method, rock strength-stress ratio method, Barton criterion, stress concentration coefficient method, Russenes criterion and Erlang Mountain criterion.The analysis results correspond to the actual site conditions, the results show that Barton criterion and rock strength stress ratio evaluation system is more accurate.Using these two types of rockburst prediction criteria, it is predicted that the risk of rockburst may start to appear in Jiangjiayao Mine around 1 400-1 600 m, which provides scientific basis and guidance for the later deep mining.

       

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