Das, Arka Jyoti and Mandal , Prabhat Kumar and Ghosh , C.N. and Sinha, A. (2017) 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, 27 (2). pp. 261-267. ISSN 2095-2686

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Abstract

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.

Item Type:	Article
Uncontrolled Keywords:	Locked-up coal Confined core Yield criterion Strengthened rib pillar Strain softening
Subjects:	Mine Stowing and Filling
Divisions:	UNSPECIFIED
Depositing User:	Mr. B. R. Panduranga
Date Deposited:	04 Aug 2017 06:51
Last Modified:	04 Aug 2017 06:51
URI:	http://cimfr.csircentral.net/id/eprint/1762

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