Geomechanics of subsidence above single and multi-seam coal mining
Accurate prediction of surface subsidence due to the extraction of underground coal seams is a significant challenge in geotechnical engineering. This task is further compounded by the growing trend for coal to be extracted from seams either above or below previously extracted coal seams, a practice...
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doaj-005e8fa76fc34776941b6668dad274022020-11-24T23:47:37ZengElsevierJournal of Rock Mechanics and Geotechnical Engineering1674-77552016-06-018330431310.1016/j.jrmge.2015.11.007Geomechanics of subsidence above single and multi-seam coal miningA.M. Suchowerska Iwanec0J.P. Carter1J.P. Hambleton2Golder Associates, Sydney, AustraliaARC Centre of Excellence for Geotechnical Science and Engineering, The University of Newcastle, Newcastle, AustraliaARC Centre of Excellence for Geotechnical Science and Engineering, The University of Newcastle, Newcastle, AustraliaAccurate prediction of surface subsidence due to the extraction of underground coal seams is a significant challenge in geotechnical engineering. This task is further compounded by the growing trend for coal to be extracted from seams either above or below previously extracted coal seams, a practice known as multi-seam mining. In order to accurately predict the subsidence above single and multi-seam longwall panels using numerical methods, constitutive laws need to appropriately represent the mechanical behaviour of coal measure strata. The choice of the most appropriate model is not always straightforward. This paper compares predictions of surface subsidence obtained using the finite element method, considering a range of well-known constitutive models. The results show that more sophisticated and numerically taxing constitutive laws do not necessarily lead to more accurate predictions of subsidence when compared to field measurements. The advantages and limitations of using each particular constitutive law are discussed. A comparison of the numerical predictions and field measurements of surface subsidence is also provided.http://www.sciencedirect.com/science/article/pii/S1674775516000159MiningCoalLongwall miningSubsidenceMulti-seam miningConstitutive modelling |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
A.M. Suchowerska Iwanec J.P. Carter J.P. Hambleton |
spellingShingle |
A.M. Suchowerska Iwanec J.P. Carter J.P. Hambleton Geomechanics of subsidence above single and multi-seam coal mining Journal of Rock Mechanics and Geotechnical Engineering Mining Coal Longwall mining Subsidence Multi-seam mining Constitutive modelling |
author_facet |
A.M. Suchowerska Iwanec J.P. Carter J.P. Hambleton |
author_sort |
A.M. Suchowerska Iwanec |
title |
Geomechanics of subsidence above single and multi-seam coal mining |
title_short |
Geomechanics of subsidence above single and multi-seam coal mining |
title_full |
Geomechanics of subsidence above single and multi-seam coal mining |
title_fullStr |
Geomechanics of subsidence above single and multi-seam coal mining |
title_full_unstemmed |
Geomechanics of subsidence above single and multi-seam coal mining |
title_sort |
geomechanics of subsidence above single and multi-seam coal mining |
publisher |
Elsevier |
series |
Journal of Rock Mechanics and Geotechnical Engineering |
issn |
1674-7755 |
publishDate |
2016-06-01 |
description |
Accurate prediction of surface subsidence due to the extraction of underground coal seams is a significant challenge in geotechnical engineering. This task is further compounded by the growing trend for coal to be extracted from seams either above or below previously extracted coal seams, a practice known as multi-seam mining. In order to accurately predict the subsidence above single and multi-seam longwall panels using numerical methods, constitutive laws need to appropriately represent the mechanical behaviour of coal measure strata. The choice of the most appropriate model is not always straightforward. This paper compares predictions of surface subsidence obtained using the finite element method, considering a range of well-known constitutive models. The results show that more sophisticated and numerically taxing constitutive laws do not necessarily lead to more accurate predictions of subsidence when compared to field measurements. The advantages and limitations of using each particular constitutive law are discussed. A comparison of the numerical predictions and field measurements of surface subsidence is also provided. |
topic |
Mining Coal Longwall mining Subsidence Multi-seam mining Constitutive modelling |
url |
http://www.sciencedirect.com/science/article/pii/S1674775516000159 |
work_keys_str_mv |
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