Olugbenga, AG, Antony, SJ orcid.org/0000-0003-1761-6306, Nasir, A et al. (2 more authors) (2022) Experimental DEM Hybrid Approach for Prediction of Landslide in Ughelli Sandstone. In: Lecture Notes in Electrical Engineering. World Congress on Engineering 2021, 07-09 Jul 2021, London, U.K. Springer Singapore , pp. 87-100. ISBN 9789811935787
Abstract
Landslide is a rare occurrence in Nigeria; however, in recent time, it has been reported to have occurred. Therefore, it is important to simulate tensile failure and the associated crack number by subjecting the sandstone to compressional stress. The aim is to relate crack number to micro-structural disaggregation which is the degree of isotropic and deviatoric stress in the material. Therefore, the framework for tracking the damage mechanism of Ughelli formation has been provided using strain data. Strain gauges were employed to track the grain slippage during confined compression test, while micro-elastic properties were evaluated as bond stiffness measured from ultrasonic wave velocity. Next the granular assembly of the sandstone was simulated by clumping particles. The granular model was subjected to confined test to reproduce the elastic properties of the natural sandstone. The existing micro-cracks in the rock progress by grain slip and bond breakage of the cementing clay content between the grains. The damage was reached at an observed grain slippage stress of 90 MPa in the natural formation. The systematic crack growth peaks at a stress level of 160 MPa with a straining rate of 10–5(s−1). By shifting away from representing a grain of sandstone with single spherical particles, the significant discrepancies between the elastic properties of observed core sample and the simulated model are improved. The identification of the first grain slippage at possible fracture localized points during a drilling program will suggest injection of plugging pills to maintain wellbore stability. This is because it is often easier and effective to prevent undue landslides than to remedy the occurrence.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2023 The Author(s). This is an author produced version of a conference paper Lecture Notes in Electrical Engineering. Uploaded in accordance with the publisher's self-archiving policy. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 16 Nov 2022 15:33 |
Last Modified: | 28 Sep 2023 00:13 |
Status: | Published |
Publisher: | Springer Singapore |
Identification Number: | 10.1007/978-981-19-3579-4_7 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:193382 |