Modeling of in-situ horizontal stresses and orientation of maximum horizhontal stress in the gas hydrate-bearing sediments of the Mahanadi offshore basin, India

Shukla, Pradeep Kumar; Singha, Dip Kumar; Sain, Kalachand

doi:10.1007/s40948-022-00401-6

Cited by 9 publications

(2 citation statements)

References 44 publications

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“…River confluences are where rivers meet and are therefore fundamental components of natural channel drainage networks (Shukla et al, 2022a). The river confluence is an environment with continuous changes in the flow structure such as speed, direction and flow rate (Best & Rhoads, 2008;Yuan et al, 2022); in the composition of sediments and nutrients (Nazari-Giglou et al, 2016;Yu et al, 2020); and in the morphology of the receptor channel (Best & Roy, 1991;Sukhodolov et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

Dramatic changes in the confluence morphology drived by an extreme hydrologic pulse: impacts to River Doce restoration

Marciano,

Assireu,

Azevedo

et al. 2024

RBRH

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On January 2022, the Carmo River (a tributary of the Doce River) was affected by an extreme hydrological event, with 50-yr return interval. This event was 50% higher than that associated to one of the largest tailing dam failures ever reported that took place in the Gualaxo do Norte River. This delivered to Doce River, through the Carmo River, in a Y-shaped confluence, the contaminated tailing slurry. In order to understand the role of tributaries in the recovery of the Doce River, 2D hydrodynamic and 2D sediment transport models were applied at the confluence of the Carmo River with the Piranga River. Our results, based on hydraulic modeling, remote sensing, and in-situ measurements, indicated that significant amounts of sediments were trapped on the riverbanks and stone banks, making this confluence an important site for the retention of contaminated sediments, influencing sediment budgets and downstream water quality. Therefore, this confluence deserves special attention from water engineering in order to prevent the sediments retained in this area from being transported downstream during extreme events in the coming years. These results can contribute to decision-making, to identify reaches with greater susceptibility to erosion and sediment deposition and to plan the restoration of these rivers.

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Section: Introductionmentioning

confidence: 99%

Dramatic changes in the confluence morphology drived by an extreme hydrologic pulse: impacts to River Doce restoration

Marciano,

Assireu,

Azevedo

et al. 2024

RBRH

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“…When the distance between the tested fractures is greater than 50 m, a stress gradient value needs to be provided [10]. At present, due to limited measured data and geological information, studies typically use numerical simulation technology to invert the distribution characteristic of 3-D in situ stress fields for the entire research area [14][15][16]. However, the accuracy of the in situ stress field obtained using this method depends not only on the reliability and representativeness of the in situ stress testing data but also on numerous factors such as numerical models, boundary conditions, and geological parameters [17].…”

Section: Introductionmentioning

confidence: 99%

Estimation Method for an In Situ Stress Field along a Super-Long and Deep-Buried Tunnel and Its Application

Pei

Wang

et al. 2023

Buildings

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Aiming at some stress-induced failure phenomena in surrounding rock that occur during the construction of super-long and deep-buried tunnels, a method for estimating the in situ stress in the tunnels based on multivariate information integration is proposed, which uses a small amount of in situ stress measurement, stereographic projection technology, and a numerical simulation method. Firstly, by conducting a macroscopic analysis of the regional geological structure, topography, and pre-excavated small tunnels (such as exploration of adits and pilot tunnels), the strength of the tectonic stress field and the orientation of the principal stresses in the tunnel sections are preliminarily determined. Secondly, the reliability of the in situ stress measurement data were analyzed using full-space stereographic projection and the plane stress projection method. Then, some representative measurement points that reflected the distribution characteristics of in situ stress in the project area, on the whole, were determined. Thirdly, the finite difference (FDM) and multiple regression analysis (MRA) methods were used to inverse the in situ stress field in the project area. The proposed method was applied to a super-long and deep-buried tunnel project in Qinling, and the in situ stress distribution characteristics of the tunnel sections at different mileages were obtained. The results show that both the calculated principal stress values and the azimuth angle of the maximum horizontal principal stress are in good agreement with the measured ones, indicating that the method used in this study is reasonable. Finally, the typical surrounding rock failure phenomena encountered during the excavation of the project were investigated, and targeted treatment measures were proposed. The research results can provide references for support design and disaster management of surrounding rock in deep-buried long tunnels.

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A weight factor-based backward method for estimating ground stress distribution from the point measurements

Pei,

Wu,

Ding

et al. 2023

Bull Eng Geol Environ

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Modeling of in-situ horizontal stresses and orientation of maximum horizhontal stress in the gas hydrate-bearing sediments of the Mahanadi offshore basin, India

Cited by 9 publications

References 44 publications

Dramatic changes in the confluence morphology drived by an extreme hydrologic pulse: impacts to River Doce restoration

Dramatic changes in the confluence morphology drived by an extreme hydrologic pulse: impacts to River Doce restoration

Estimation Method for an In Situ Stress Field along a Super-Long and Deep-Buried Tunnel and Its Application

A weight factor-based backward method for estimating ground stress distribution from the point measurements

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