Impact of seismic source processes on ground motion variability of induced earthquakes in geothermal reservoirs, mines and laboratory experiments

需要改进和进一步发展油藏工程技术，如刺激地热油藏、开采深部矿山和利用其他地质油藏，这就提出了需要解决的基本问题，如减轻地面上可以感觉到的诱发地震活动。在诱发地震活动的研究中特别关注的是规模更大的地震，它可能对工程结构构成极大的威胁，引发公众接受问题，甚至对矿井下的工作人员造成生命威胁。诱发地震与易损物(工程结构、当地社区)之间的距离通常很小，通常不超过几公里。因此，震源中发生的实际过程对记录的地面运动和潜在的损失和损害具有重要的贡献。该项目旨在调查震源中发生的物理过程对观测到的地面运动变异性的贡献，特别关注人为开采地球资源引起的地震活动。该项目还旨在了解技术作业(例如开采矿石、注入流体)、地质力学/地质条件之间的相互作用，并获得关于震源过程的高分辨率信息，以了解和减轻与地震和大震级事件发生有关的地震灾害。

The need to refine and further develop reservoir engineering techniques such as stimulation of geothermal reservoirs, exploitation of deep mines and utilizing other geo-reservoirs poses fundamental questions to be addressed such as mitigation of induced seismicity large enough to be felt on the surface. Of special concern in studies of induced seismicity are larger magnitude earthquakes, which might pose an extraordinary threat to engineering structures, raise public-acceptance issues or even cause a life-threat to underground workers in mines.Frequently, distances between induced earthquakes and vulnerable objects (engineering structures, local communities) are very small, often not exceeding a few kilometers. As a consequence, actual processes occurring in seismic source present an important contribution to recorded ground motions and to potential loses and damages. This project aims to investigate the contribution of physical processes occurring in the earthquake source to the observed ground motion variability with a special focus on the seismicity induced by man-made exploitation of georesources. The project also aims at understanding interactions between technological operations (e.g. ore exploitation, fluid injection), geomechanical/geological conditions and obtained high resolution information on processes in earthquake source in order to understand and mitigate the seismic hazard related to earthquakes and occurrence of large magnitude events.