Abstract
AbstractInduced seismicity is strongly related to various engineering projects that cause anthropogenic in-situ stress change at a great depth. Hence, there is a need to estimate and mitigate the associated risks. In the past, various simulation methods have been developed and applied to induced seismicity analysis, but there is still a fundamental difference between simulation results and field observations in terms of the spatial distribution of seismic events and its frequency. The present study aims to develop a method to simulate spatially distributed on-fault seismicity whilst reproducing a complex stress state in the fault zone. Hence, an equivalent continuum model is constructed, based on a discrete fracture network within a fault damage zone, by employing the crack tensor theory. A fault core is simulated at the center of the model as a discontinuous plane. Using the model, a heterogeneous stress state with stress anomalies in the fault zone is first simulated by applying tractions on the model outer boundaries. Subsequently, the effective normal stress on the fault plane is decreased in a stepwise manner to induce slip. The simulation result is validated in terms of theb-value and other seismic source parameters, hence demonstrating that the model can reproduce spatially and temporally distributed on-fault seismicity. Further analysis on the parameters shows the variation of frequency-magnitude distribution before the occurrence of large seismic events. This variation is found to be consistent with field observations, thus suggesting the potential use of this simulation method in evaluating the risk for seismic hazards in various engineering projects.
Publisher
Springer Science and Business Media LLC
Subject
Energy Engineering and Power Technology,Geotechnical Engineering and Engineering Geology
Reference75 articles.
1. Agosta F, Alessandroni M, Antonellini M, Tondi E, Giorgioni M (2010) From fractures to flow: a field-based quantitative analysis of an outcropping carbonate reservoir. Tectonophysics 490:197–213
2. Bandis S, Lumsden AC, Barton NR (1983) Fundamentals of rock joint deformation. Int J Rock Mech Min Sci Geomech 20:249–268
3. Barth A, Wenzel F, Langenbruch C (2011) Probability of earthquake occurrence and magnitude estimation in the post shut-in phase of geothermal projects. J Seismolog 17:5–11
4. Barton N (1976) Rock mechanics review the shear strength of rock and rock joints. Int J Rock Mech Min Sci Geomech Abstr 13:255–279
5. Beer W, Jalbout A, Riyanto E, Ginting A, Sullivan M, Collins DS (2017) The design, optimisation, and use of the seismic system at the deep and high-stress block cave Deep Mill Level Zone mine. In: Hudyma M, Potvin Y (eds) Undergound mining technology
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