An experimental study to characterize the initiation of the seismic-induced Tsaoling rock avalanche

Wu, Jian Hong; Liao, Cheng Jie; Lin, Hsiu‐Mei; Fang, Tzu Ting

doi:10.1016/j.enggeo.2016.12.015

Cited by 22 publications

(6 citation statements)

References 27 publications

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“…Basal sliding can also occur along the soil-rock interface in debris flows, rock slides, and rock avalanches (Chigira et al, 2010;Fan, Xu, Scaringi, Dai, et al, 2017;Hungr et al, 2014;Hu et al, 2015;Xu et al, 2012), although shear localization in this latter typology might not be exclusive (Zhang & McSaveney, 2017). Nevertheless, observations and analyses support a velocity-weakening mechanism-of various possible origins-to explain the catastrophic failure and hypermobility of these types of landslides (e.g., Aaron et al, 2017;Alonso et al, 2016;De Blasio & Crosta, 2015;Handwerger et al, 2016;Hu et al, 2017;Johnson et al, 2016;Lucas et al, 2014;Song et al, 2016;Wu et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Shear‐Rate‐Dependent Behavior of Clayey Bimaterial Interfaces at Landslide Stress Levels

Scaringi

et al. 2018

Geophysical Research Letters

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The behavior of reactivated and first‐failure landslides after large displacements is controlled by the available shear resistance in a shear zone and/or along slip surfaces, such as a soil‐bedrock interface. Among the factors influencing the resistance parameter, the dependence on the shear rate can trigger catastrophic evolution (rate‐weakening) or exert a slow‐down feedback (rate‐strengthening) upon stress perturbation. We present ring‐shear test results, performed under various normal stresses and shear rates, on clayey soils from a landslide shear zone, on its parent lithology and other lithologies, and on clay‐rock interface samples. We find that depending on the materials in contact, the normal stress, and the stress history, the shear‐rate‐dependent behaviors differ. We discuss possible models and underlying mechanisms for the time‐dependent behavior of landslides in clay soils.

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Section: Introductionmentioning

confidence: 99%

Shear‐Rate‐Dependent Behavior of Clayey Bimaterial Interfaces at Landslide Stress Levels

Scaringi

et al. 2018

Geophysical Research Letters

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“…Unconventional oil and gas production, including HF operations, does not always induce felt seismic events of major public concern; however, under specific geological factors, major seismicity can occur even after the cessation of operations (Rashedi & Mahani, 2016). Key parameters, such as the mechanical properties of the fault and the reservoir and the in‐situ conditions, can play a significant role in increasing the probability of earthquake occurrence (Van Eijs et al., 2006; Wu et al., 2017).…”

Section: Introductionmentioning

confidence: 99%

“…. Key parameters, such as the mechanical properties of the fault and the reservoir and the in-situ conditions, can play a significant role in increasing the probability of earthquake occurrence (Van Eijs et al, 2006;Wu et al, 2017).…”

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confidence: 99%

Analysis of the Hydrogeological Conditions Affecting Fault Response to Nearby Hydraulic Fracturing

2022

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The response of critically stressed dormant faults to fluid perturbation, by oil and gas production, has been a major public concern because of its link to induced seismicity. In this paper, we study the hydrogeological factors that affect a nearby fault response, during and after hydraulic fracturing (HF) operations, evaluated by the change in Coulomb Failure Stress (CFS) and the rate of seismicity (R) through coupling solid deformation and fluid flow. Our results show that the pore pressure increases rapidly in a fault that is close (hydraulically connected) to HF operations, which might lead to its activation when the injection rate is high. When the fault is adjacent to HF but distant from it, its shallow region is subjected to a stabilizing deformation‐induced normal compressive stress and its deeper region is destabilized under extension. In this case, the fault orientation and damage zone size have a significant effect on the fault's stability and response. On the other hand, decreasing the rate of injection can either increase or decrease the CFS values depending on the fault location and the dominant stresses. Therefore, serious attention should be given to the fault position, its architecture, and the injection rate to help reduce the potential for induced seismicity from HF. Our findings are verified and confirmed using the case of the Duvernay formation in Alberta, Canada, where the reported seismic data correlate with high CFS and R values.

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“…Unconventional oil and gas production, including hydraulic fracturing operations, does not always induce seismic events; however, under specific geological factors, seismicity can occur even after the cessation of operations (Rashedi and Mahani, 2016). Key parameters, such as the mechanical properties of the fault and the reservoir and the in-situ conditions, can play a significant role in increasing the probability of earthquake occurrence (Van Eijs et al, 2006;Wu et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Hydrogeological Conditions Affecting Fault Response to Nearby Hydraulic Fracturing

Yehya

Basbous

Maalouf

2022

Preprint

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The response of critically stressed dormant faults to fluid perturbation, by oil and gas production, has been a major public concern because of its link to induced seismicity. In this paper, we study the hydrogeological factors that affect a nearby fault response, during and after hydraulic fracturing (HF) operations, evaluated by the change in Coulomb Failure Stress (CFS) through coupling solid deformation and fluid flow. We take the Duvernay formation in Alberta, Canada as a base study case for our analysis. Our results show that the injection rate and the fault's distance to HF operations play an important role in increasing the CFS and hence the probability of fault reactivation. When the fault is far from the operations, its damage zones allow lateral diffusion and prevent pore pressure build up in its upper part, which stabilizes it. The lower part, however, will be under a lower normal stress and its failure may be triggered by an increase in shear stress. This is not the case for close faults where the damage zones act as conduits for pressure diffusion and the possible triggering failure mechanism will be the increase in pore pressure. Moreover, we show that the width of the HF zone does not affect the activation mechanisms or the stability of the fault unless it is hydraulically connected to its damage zone. Therefore, serious attention should be given to the fault position, its architecture, and the volume of fluid injected to help reduce the potential for induced seismicity from HF.

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An experimental study to characterize the initiation of the seismic-induced Tsaoling rock avalanche

Cited by 22 publications

References 27 publications

Shear‐Rate‐Dependent Behavior of Clayey Bimaterial Interfaces at Landslide Stress Levels

Shear‐Rate‐Dependent Behavior of Clayey Bimaterial Interfaces at Landslide Stress Levels

Analysis of the Hydrogeological Conditions Affecting Fault Response to Nearby Hydraulic Fracturing

Analysis of the Hydrogeological Conditions Affecting Fault Response to Nearby Hydraulic Fracturing

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