考虑断层滑移应力波辐射特征的巷道支护参数优化研究

发布时间：2018-06-30 04:26

本文选题：断层滑移 + 应力波传播　；参考：《采矿与安全工程学报》2017年04期

【摘要】：随着地下矿山开采向深部逐渐延伸,断层滑移引起的岩爆事件日益增多且破坏性极大,已经成为威胁矿山安全的重要因素。通过建立三维离散元模型,基于平面应变问题,开展了三维模型平面应变等效计算与二维离散元模型对比分析,结果表明该研究模型在三维空间模拟地震波的传播是可行的。通过研究辐射特征对应力波传播的影响,揭示了P/S波传播过程的方向性并进行了验证,计算结果符合断层滑移的双力偶模型。在此基础上,通过与Kaiser等提出的设计尺度率公式进行对比,发现已有的设计尺度率公式并不能完全满足工程实际要求,利用三维离散元程序开展数值计算分析能够进一步优化支护参数,以此更好地服务矿山支护系统设计,确保地下矿山安全高效开采。
[Abstract]:With the underground mining gradually extending to the deep, the rock-burst events caused by fault slip are increasing and destructive, which has become an important factor threatening the safety of mines. By establishing a three-dimensional discrete element model, based on the plane strain problem, the plane strain equivalent calculation of the three-dimensional model and the two-dimensional discrete element model are compared and analyzed. The results show that the model is feasible to simulate the propagation of seismic waves in three-dimensional space. By studying the effect of radiation characteristics on the propagation of force wave, the directionality of P / S wave propagation process is revealed and verified. The calculated results are in accordance with the double couple model of fault slip. On this basis, by comparing with the design scale rate formula proposed by Kaiser et al, it is found that the existing design scale rate formula can not fully meet the practical requirements of the project. In order to better serve the design of mine support system and ensure the safe and efficient mining of underground mines, the numerical calculation and analysis by using three-dimensional discrete element program can further optimize the supporting parameters.
【作者单位】：中南大学资源与安全工程学院;吕勒奥理工大学采矿与岩土工程系;
【基金】：国家自然科学基金项目(41272304,51504288,41372278) 瑞典政府创新局基金项目(Vinnova) 国家留学基金委项目(201406370094) 中央高校基本科研业务费专项资金项目(2013zzts058)
【分类号】：TD353

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