We present several mini-seismic methods developed and applied in recent years in the Mont Terri rock laboratory. All these applications aimed at correlating and interpreting seismically derived parameters with relevant rock-mechanical parameters and findings. The complexity of the local site setting always required very high spatial and parameter resolution. Both, seismic P- and S-wave velocities and dynamic elastic parameters, such as the dynamic Poisson’s ratio υdyn and the Young’s modulus Edyn, are used to characterise the Opalinus Clay under real in situ conditions. We were able to establish a correlation between static and dynamic elastic Young’s moduli. We describe the extremely large, small-scale variability of seismic parameters normal and parallel to the bedding plane orientation and address the question of fracture detection. We also present examples of the characterization of excavation-damaged zones with seismic parameters, including extent as well as degree of damage, and compare these to geological and structural mapping. The evolution of borehole-disturbed zones (BdZ) was deduced from repeating high-resolution borehole measurements. Finally, we quantify seismic anisotropy at dimensions between several cm and tens of m.

中文翻译：

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蒙特特里岩石实验室（瑞士）采用的高分辨率微地震方法

我们介绍了近年来在Mont Terri岩石实验室开发和应用的几种微型地震方法。所有这些应用旨在将地震导出的参数与相关的岩石力学参数和发现进行关联和解释。本地站点设置的复杂性始终要求很高的空间和参数分辨率。地震P波和S波速度以及动态弹性参数（例如动态泊松比υdyn和杨氏模量Edyn）均用于表征真实现场条件下的蛋白石粘土。我们能够在静态和动态弹性杨氏模量之间建立关联。我们描述了正常且平行于层理面方向的地震参数的极大，小规模变化，并讨论了裂缝检测的问题。我们还提供了具有地震参数（包括范围和破坏程度）的开挖损坏区域特征的示例，并将其与地质和结构图进行了比较。重复进行高分辨率的井眼测量可以推导井眼受扰区域（BdZ）的演变。最后，我们量化了几厘米至几十米之间尺寸的地震各向异性。