Extraction of locked-up coal by strengthening of rib pillars with FRP – A comparative study through numerical modelling
In some of the coalfields in India, coal seams are only developed but no extraction of pillars is possible due to the presence of surface or sub-surface structures and also non-availability of stowing materials which leads to huge amounts of coal being locked-up underground. Spontaneous heating and...
Main Authors: | , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Elsevier
2017-03-01
|
Series: | International Journal of Mining Science and Technology |
Online Access: | http://www.sciencedirect.com/science/article/pii/S2095268617300708 |
id |
doaj-0099eab86ec443009f1dff1309f601ff |
---|---|
record_format |
Article |
spelling |
doaj-0099eab86ec443009f1dff1309f601ff2020-11-25T00:49:00ZengElsevierInternational Journal of Mining Science and Technology2095-26862017-03-01272261267Extraction of locked-up coal by strengthening of rib pillars with FRP – A comparative study through numerical modellingArka Jyoti Das0Prabhat Kumar Mandal1Chandra Nath Ghosh2Amalendu Sinha3Corresponding author.; CSIR-Central Institute of Mining and Fuel Research, Dhanbad 826001, IndiaCSIR-Central Institute of Mining and Fuel Research, Dhanbad 826001, IndiaCSIR-Central Institute of Mining and Fuel Research, Dhanbad 826001, IndiaCSIR-Central Institute of Mining and Fuel Research, Dhanbad 826001, IndiaIn some of the coalfields in India, coal seams are only developed but no extraction of pillars is possible due to the presence of surface or sub-surface structures and also non-availability of stowing materials which leads to huge amounts of coal being locked-up underground. Spontaneous heating and fire, accumulation of poisonous gases, severe stability issues leading to unsafe workings and environmental hazards are the major problems associated with the developed coal pillars. So, there is a pressing need for a technology for the mining industry to extract the huge amount of coal locked-up under different constraints. In this study, the locked-up coal is proposed to be extracted by artificially strengthening the rib pillars. The detailed comparative study is carried out to know the increase of extraction percentage of locked-up coal by strengthening the rib pillars with FRP. Extraction methodology is designed and studied through numerical modelling for its stability analysis to evaluate its suitability of application in underground. Keywords: Locked-up coal, Confined core, Yield criterion, Strengthened rib pillar, Strain softeninghttp://www.sciencedirect.com/science/article/pii/S2095268617300708 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Arka Jyoti Das Prabhat Kumar Mandal Chandra Nath Ghosh Amalendu Sinha |
spellingShingle |
Arka Jyoti Das Prabhat Kumar Mandal Chandra Nath Ghosh Amalendu Sinha Extraction of locked-up coal by strengthening of rib pillars with FRP – A comparative study through numerical modelling International Journal of Mining Science and Technology |
author_facet |
Arka Jyoti Das Prabhat Kumar Mandal Chandra Nath Ghosh Amalendu Sinha |
author_sort |
Arka Jyoti Das |
title |
Extraction of locked-up coal by strengthening of rib pillars with FRP – A comparative study through numerical modelling |
title_short |
Extraction of locked-up coal by strengthening of rib pillars with FRP – A comparative study through numerical modelling |
title_full |
Extraction of locked-up coal by strengthening of rib pillars with FRP – A comparative study through numerical modelling |
title_fullStr |
Extraction of locked-up coal by strengthening of rib pillars with FRP – A comparative study through numerical modelling |
title_full_unstemmed |
Extraction of locked-up coal by strengthening of rib pillars with FRP – A comparative study through numerical modelling |
title_sort |
extraction of locked-up coal by strengthening of rib pillars with frp – a comparative study through numerical modelling |
publisher |
Elsevier |
series |
International Journal of Mining Science and Technology |
issn |
2095-2686 |
publishDate |
2017-03-01 |
description |
In some of the coalfields in India, coal seams are only developed but no extraction of pillars is possible due to the presence of surface or sub-surface structures and also non-availability of stowing materials which leads to huge amounts of coal being locked-up underground. Spontaneous heating and fire, accumulation of poisonous gases, severe stability issues leading to unsafe workings and environmental hazards are the major problems associated with the developed coal pillars. So, there is a pressing need for a technology for the mining industry to extract the huge amount of coal locked-up under different constraints. In this study, the locked-up coal is proposed to be extracted by artificially strengthening the rib pillars. The detailed comparative study is carried out to know the increase of extraction percentage of locked-up coal by strengthening the rib pillars with FRP. Extraction methodology is designed and studied through numerical modelling for its stability analysis to evaluate its suitability of application in underground. Keywords: Locked-up coal, Confined core, Yield criterion, Strengthened rib pillar, Strain softening |
url |
http://www.sciencedirect.com/science/article/pii/S2095268617300708 |
work_keys_str_mv |
AT arkajyotidas extractionoflockedupcoalbystrengtheningofribpillarswithfrpacomparativestudythroughnumericalmodelling AT prabhatkumarmandal extractionoflockedupcoalbystrengtheningofribpillarswithfrpacomparativestudythroughnumericalmodelling AT chandranathghosh extractionoflockedupcoalbystrengtheningofribpillarswithfrpacomparativestudythroughnumericalmodelling AT amalendusinha extractionoflockedupcoalbystrengtheningofribpillarswithfrpacomparativestudythroughnumericalmodelling |
_version_ |
1725253708114034688 |