| 高海拔矿区地应力测量与岩爆倾向性评价 |
| 投稿时间：2020-04-10 修订日期：2022-01-16 点此下载全文 |
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| 中文摘要:采用套孔应力解除法和空心包体三轴应变计,完成甲玛矿区井下4个水平的地应力测量,获得8组三维地应力状态数据,揭示了矿区地应力场的分布规律,建立了矿区地应力场模型。根据地应力实测数据,采用多角度、多重判据对围岩岩爆倾向性进行评价。结果表明：甲玛矿区地应力以水平构造应力为主导,属构造应力场型矿区,地应力量级属中等,井下围岩岩爆倾向性为弱~中等。研究成果对指导矿山井巷工程设计、采场布置、支护参数优化及地压灾害防控等具有重要参考价值。 |
| 中文关键词:地应力 应力解除 构造应力 岩爆 |
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| In-situ stress measurement and evaluation of rock burst orientation in high altitude mining |
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| Abstract:Useing stress release method and hollow postures triaxial strain gauge, complete Tibet JiaMa borehole four levels borehole stress measuring, 8 groups of three dimensional stress state data obtained, reveals the mining area of ground stress field distribution law, mining to stress field model is established, analyzed JiaMa mining ground stress distribution and the relationship between geological structure. Results show that the geostress JiaMa mining area is dominated by horizontal tectonic stress, mining area belongs to typical tectonic stress field type, in-situ stress level is medium. According to the in-situ stress measurement data, using the multiple perspectives, multiple criteria to evaluate rock burst orientation of surrounding rock, the results show that the JiaMa propensity to rock burst in mining area of surrounding rock is between weak to moderate. Related research results for JiaMa mining underground mining provides reliable basic data, to guide the mine engineering design, stope layout, supporting parameters optimization and the ground pressure disaster prevention and control, etc have important reference value. |
| keywords:in-situ stress stress release tectonic stress rock burst |
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