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Keywords: seismicity
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Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1572
... conditions, most shale gouges are frictionally strong and exhibit velocity-strengthening response, indicative of fault aseismic slip, except for ~5% of shale gouges showing velocity-weakening behavior and potentially promoting seismic slip. Considering the small proportion of unstable shale gouges...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1806
... ABSTRACT: Efforts to quantify induced-seismicity risk and to develop mitigation strategies are hampered by a dearth of numerical schemes that can accommodate realistic Earth models while capturing the full spectrum of applicable physics. Here we present a new approach to modelling induced...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-2078
... ABSTRACT: On 30 November 2018, a felt (ML 4.5) seismic event occurred near Fort St. John, British Columbia, that has been attributed to ongoing hydraulic fracturing operations in the area. Over a 2 week period (3 days before, and 10 days after the mainshock), almost 600 events (M L −0.3 to M...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1955
... ABSTRACT: Understanding the physical mechanisms controlling fluid-injection-induced seismicity in a gouge-filled fault is crucial in the assessment and mitigation of induced seismicity, especially in the context of subsurface technologies like wastewater disposal, hydraulic fracturing, oil...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1577
... for the implementation of Destress Blasting in the Personnel Access Tunnel P4600 (TAP P4600) of the El Teniente New Mine Level Project, as well as the preliminary results obtained from the capture of geological, geomechanical and operational data. Finally, the seismic response of the rock mass to mining is compared...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1220
... ABSTRACT: A geomechanical study was performed for a fault activation sequence in Western Canada to assess how various operational changes hydraulic fracture design impacts seismicity. A discrete-element code with coupled hydraulic-mechanical-seismic capability was calibrated to field...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-2120
... earthquake seismicity reservoir characterization infrastructure africa metals & mining information okavango delta region east african rift system epicenter tectonic plate magnitude proximity botswana south africa botswana geoscience institute southward extension richter scale ARMA 21...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0056
... mines. Sill pillars, or diminishing pillars, experience a significant increase in mining induced stress that has resulted in extensive seismicity, including some major seismic events. A large number of mitigation strategies, including both strategic and tactical control measures, have been developed...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0043
... scale instability, large seismic events or inrushes the analysis and decision-making process during design and operations is harder to prescribe. Often, only the measurement and observation tasks at a mine are properly documented, and the ensuing analysis and critical remedial actions are not prescribed...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0106
... density inversion MEQ machine learning hydraulic fracturing stimulation fluid pressure seismicity probability Artificial Intelligence Fluid Dynamics Earthquake genetic algorithm riffault Dempsey cloud 1 1. INTRODUCTION Hydraulic stimulation is applied to wells to improve formation...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0298
... ABSTRACT: Mining-induced seismic hazards continue to pose significant challenges for ground control at deep hard-rock underground mines. In the tradeoff between full production and absolute safety, the seismic hazards at deep mines can only be routinely assessed and then selectively mitigated...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0140
... in the estimation of how the crust responds to fluid injection and the associated induced seismic hazard. Here, we use data-driven hydromechanical modeling of fluid injection to show how the fault permeability enhancement, the stress perturbation and the fault structure have an important effect on the fluid...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0256
... ABSTRACT: This paper details back analysis conducted at two mines with the purpose of informing exposure management procedures to manage seismic risk. The analysis was intended to help each mine determine which blasts should have an exclusion, what the area of exclusion should be and when re...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1554
... ABSTRACT: Damaging seismic events in mines can have a significant impact on safety and production, therefore it is important to understand these events to help prevent or mitigate the effect in future. Seismicity is caused by changing stress conditions in the local volume of rock. Studying...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1578
... ABSTRACT: An integrated approach is proposed to identify possible triggering mechanisms of the induced seismicity by analyzing a seismicity sequence in the Duvernay Formation. Based on a case study, we establish linkages between regional faults, an induced seismicity sequence, and hydraulic...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1679
... ABSTRACT: Evaluating stope performance is important for improving stope stability, production efficiency, and profitability. Underground mines are Operating at greater depths where workers and excavations are exposed to hazards such as seismic events, which are not addressed by standard...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1991
...-) seismicity. Faults are reactivated when the shear stress exceeds the limiting acceptable strength. It has been observed in The Netherlands that this occurrence can happen “unexpectedly” during the life of a UGS reservoir, i.e. when the actual stress regime is not expected to reach the failure condition...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1903
... ABSTRACT: High-stress environments have become more common in recent years as mines are getting deeper every time. These environments imply an increase in the seismic hazard generated by the sudden release of energy from mining activities. Seismic events which cause visible damage...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-2183
... ABSTRACT: We present a new fault injection model for induced seismicity in the context of geothermal systems. The characteristic and novelty of our model is that it is both (1) fast and thus allows a probabilistic assessment and (2) purely physic-based in the sense that none unconstrained...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0480
... geomechanics Fluid Dynamics stability hydro-mechanical modeling multiphase flow pore pressure injection-induced seismicity flow in porous media fault permeability Flow System perturbation sandia national laboratory injection Reservoir Characterization Upstream Oil & Gas poroelasticity system...

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