Is in situ stress important to groundwater flow in shallow fractured rock aquifers?

Mortimer, L.; Aydın, Adnan; Simmons, Craig T.; Love, Andrew J.

doi:10.1016/j.jhydrol.2010.12.034

Cited by 23 publications

(6 citation statements)

References 27 publications

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“…Also the observation of outcropping fractures does not help significantly, because the distance between the two sides of a fracture changes with depth. Tracer tests [ Małoszewski and Zuber , ; Maloszewski et al ., ; Vincenzi et al ., ] or the use of environmental tracers, such as radon [ Cook et al ., ; Le Druillennec et al ., ; Mortimer et al ., ] or water isotopes and hydrochemistry [ Uliana and Sharp , ; Uliana et al ., ], can also give information on groundwater flow velocity or flow path.…”

Section: Introductionmentioning

confidence: 99%

Correlation between groundwater flow and deformation in the fractured carbonate Gran Sasso aquifer (INFN underground laboratories, central Italy)

Amoruso

Crescentini

Martino

et al. 2014

Water Resources Research

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The Gran Sasso massif is a carbonate fractured aquifer with a spring discharge of more than 18 m 3 s 21 . The water table has been partially drained by two motorway tunnels and an underground laboratory (UL), located into the core aquifer. Karst features have limited role below the water table, where groundwater flow is mainly regulated by the fracture network. Two paired laser extensometers (BA and BC) recorded ground deformation in the UL. Changes in deformation correlate with the seasonal recharge/discharge cycle of groundwater flow and its long-term changes. Hydrostatic conditions prevail during the recharge phases because of the low permeability of local fractures, favoring compression, and hydraulic gradient increase above the UL. Fast groundwater flow through the high-permeability fault outcropping in the UL can enhance local dilatation for short periods. Spring discharge during exhaustion periods is fed by the low-permeability fracture network, fostering hydrodynamic conditions by hydraulic gradient decrease, diminishing compression and consequently favoring dilatation. Independent support to this conceptual model comes from local tests and a numerical model which highlights the hydromechanical strain effects induced by the hydrological cycle on the jointed rock mass along BA and the role of the hydraulic gradient on the rock mass deformation.

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Section: Introductionmentioning

confidence: 99%

Correlation between groundwater flow and deformation in the fractured carbonate Gran Sasso aquifer (INFN underground laboratories, central Italy)

Amoruso

Crescentini

Martino

et al. 2014

Water Resources Research

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“…Dessa forma, é fundamental que o histórico tectônico da região seja considerado na determinação dos grupos de fraturas com maior potencial hidráulico. A tectônica é o fenômeno gerador de descontinuidades, responsável pela abertura e reativação ou pelo fechamento de fraturas, sendo especialmente importantes os eventos neotectônicos mais recentes, que têm grande influência na atual configuração da rede de fraturas hidraulicamente ativas (FERNANDES, 2008;MORTIMER et al, 2011;MATTILA;TAMMISTO, 2012).…”

Section: Discussionunclassified

Caracterização estrutural em top-down de aquíferos fraturados: exemplo em Barra Mansa, Rio de Janeiro

Sartorio¹,

Bertolo²,

Pino³

et al. 2021

R. Águas Subter.

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No contexto brasileiro, aquíferos cristalinos fraturados têm importância significativa para o abastecimento público e privado nas regiões mais povoadas e de maior relevância econômica, o que justifica a necessidade de se avançar cada vez mais no seu conhecimento. Em geral, entretanto, várias das técnicas e ferramentas adequadas para a investigação desse meio geológico ainda são pouco exploradas na totalidade, tanto para as tarefas de locação de novos poços, como para a previsão do comportamento de contaminantes em situações de investigação de áreas contaminadas. Neste estudo, se pretende chamar a atenção para a aplicação conjunta de técnicas convencionais para o desenvolvimento de um modelo conceitual geológico numa área contaminada em aquífero fraturado, cujos resultados embasam as etapas de investigações subsequentes, mais avançadas. A metodologia integra três técnicas tradicionais e não invasivas, com escalas de investigação se desenvolvendo da regional para a local (top-down): (1) análise de lineamentos; (2) amostragem estrutural em afloramentos; e (3) imageamento geofísico pelo método de caminhamento elétrico. No caso estudado, as três técnicas geraram resultados progressivamente consistentes para a melhor caracterização do aquífero, possibilitando a identificação dos trends estruturais e dos principais grupos de fraturas da região. Assim, os lineamentos identificados guardaram ótima correlação com os trends estruturais identificados em campo; similarmente, zonas de baixa resistividade identificadas nos caminhamentos elétricos coincidiram com a localização dos lineamentos e das zonas de fraturas. A correlação entre os resultados das três etapas foi fundamental para a melhor compreensão da dinâmica de fluxo do aquífero, estabelecendo, em escala local, o modelo conceitual geológico-estrutural e as estruturas que apresentam maior potencial para fluxo de água e, potencialmente, para o transporte de contaminantes.

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“…Numerical simulations are effective to analyze the effect of multiple factors on mine stability. As numerical simulations can also be used to study the hydromechanical behaviors of a mine [79][80][81][82], and the underground mine cavities may be infused with water, numerical simulation may be a powerful tool to study the mechanisms of the long-term instability of partial extraction mines. When utilizing numerical simulation methods, it is necessary to select proper models and input parameters according to the research purpose.…”

Section: Numerical Simulation Methodsmentioning

confidence: 99%

Subsidence Mechanism and Stability Assessment Methods for Partial Extraction Mines for Sustainable Development of Mining Cities—A Review

Chen

Deng

et al. 2018

Sustainability

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Abstract:Partial extraction methods such as underground strip pillar mining or room-and-pillar mining are widely adopted techniques to control ground subsidence. However, pillar failure in partial extraction mines may introduce violent secondary ground collapses. The stability of partial extraction mines dictates the safety of ground surface structures and the environmental health state of the surrounding mining areas. To reuse mining subsidence lands, it is necessary to evaluate the stability of the land through mine subsidence assessments. This paper summarizes current pillar stability assessment methods and their limitations, and the rock mechanics associated with the stability of abandoned mines. The effects of multiple factors that affect mine stability are discussed in detail; special attention has been extended to discuss the weathering effects associated with infused water and spontaneous combustion, as these are some key reasons for pillar strength degradation in abandoned mines. The mechanism of mine collapse and the corresponding post-mining disasters are also summarized. Finally, suggestions and strategies to improve current mine stability assessment methods are proposed based on the perspective of subsidence control.

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Is in situ stress important to groundwater flow in shallow fractured rock aquifers?

Cited by 23 publications

References 27 publications

Correlation between groundwater flow and deformation in the fractured carbonate Gran Sasso aquifer (INFN underground laboratories, central Italy)

Correlation between groundwater flow and deformation in the fractured carbonate Gran Sasso aquifer (INFN underground laboratories, central Italy)

Caracterização estrutural em top-down de aquíferos fraturados: exemplo em Barra Mansa, Rio de Janeiro

Subsidence Mechanism and Stability Assessment Methods for Partial Extraction Mines for Sustainable Development of Mining Cities—A Review

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