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Damage Evaluation for Rock Burst Proneness of Deep Hard Rock under Triaxial Cyclic Loading

机译:三轴循环荷载作用下深部硬岩爆裂倾向性破坏评估

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High stress and strong excavation disturbance are the main causes of dynamic disasters, rock burst in deep hard rocks, and are more frequent and violent than those in shallow, which seriously restricts the deep mining. Given rock burst encountered in deep mining of Lingnan metal mines, the optimized triaxial cyclic loading and unloading tests are designed to characterize the performance of rock failure and to evaluate the rock burst proneness. The correlation between elastic energy index and damage evolution is built, and rock burst proneness in each status is analyzed; furthermore, the dissipation energy in the failure process of deep rocks is explicated. In this paper, the law that the elastic energy index via damage increases is drawn. In terms of the dynamic disaster conditions in the deep rock, the identification approach for the damage zone of the rock burst is established.
机译:高应力和强烈的开挖扰动是造成动态灾害的主要原因,深部硬岩石中的岩石破裂,比浅部岩石更频繁,更剧烈,严重限制了深部采矿。考虑到岭南金属矿山深部开采过程中发生的岩爆,设计了优化的三轴循环加载和卸载试验,以表征岩石破坏的性能并评估岩爆的倾向性。建立了弹性能指数与损伤演化的相关性,分析了每种状态下的岩爆倾向。此外,还阐述了深部岩石破坏过程中的耗散能量。本文提出了通过损伤增加弹性能指数的规律。针对深部岩层的动态灾害情况,建立了岩爆损伤区域的识别方法。

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