Abstract In this work we investigated seismic and aseismic rock mass behaviors in response to deep underground mining. For this purpose, an area under production of the metal mine of Garpenberg (Sweden) was instrumented with a geophysical and geotechnical monitoring network. In situ monitoring data were analyzed and interpreted considering mining operations and the local geological setting. In addition, a 3D elasto-plastic numerical model was built to better understand the interactions between quasi-static stress changes due to mining and the generation of the induced seismicity. Results of this multiparameter approach show a complex rock mass response. We observed two main types of seismic behaviors: one local and temporally short, directly induced by production, the other long-lasting over time and remote from excavations being mainly controlled by geological heterogeneities. In addition to seismicity, we also observed creep-like phenomena induced by mining. In turn, these time-dependent strains appear to be a third mechanism driving seismicity. All these findings underline the importance of considering both seismic and aseismic deformations when one wants to characterize the rock mass response to mining. This significantly enhances our understanding of the phenomena involved, as well as their interactions, for an improved hazard assessment in deep mining operations.

中文翻译：

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现场监测和 3D 地质力学数值模拟，以评估响应深部开采的地震和抗震岩石变形

摘要 在这项工作中，我们研究了响应深部地下开采的地震和抗震岩体行为。为此，在 Garpenberg（瑞典）金属矿生产区安装了地球物理和岩土工程监测网络。考虑到采矿作业和当地地质环境，对现场监测数据进行了分析和解释。此外，还建立了 3D 弹塑性数值模型，以更好地了解采矿引起的准静态应力变化与诱发地震活动之间的相互作用。这种多参数方法的结果显示了复杂的岩体响应。我们观察到两种主要类型的地震行为：一种是由生产直接诱发的局部和时间短的地震行为，另一个长期持续且远离挖掘的主要受地质异质性控制。除了地震活动之外，我们还观察到了由采矿引起的蠕变现象。反过来，这些与时间相关的应变似乎是驱动地震活动的第三种机制。所有这些发现都强调了在想要表征岩体对采矿的响应时同时考虑地震和抗震变形的重要性。这显着增强了我们对所涉及现象及其相互作用的理解，以改进深部采矿作业中的危险评估。所有这些发现都强调了在想要表征岩体对采矿的响应时同时考虑地震和抗震变形的重要性。这显着增强了我们对所涉及现象及其相互作用的理解，以改进深部采矿作业中的危险评估。所有这些发现都强调了在想要表征岩体对采矿的响应时同时考虑地震和抗震变形的重要性。这显着增强了我们对所涉及现象及其相互作用的理解，以改进深部采矿作业中的危险评估。