Singh, Rajendra and Mandal, Prabhat Kumar and Singh, Arun Kumar and Kumar, Rakesh and Sinha, A. (2007) Optimal Underground Extraction of Coal at Shallow Cover Beneath Surface/Subsurface Objects: Indian Practices. Rock Mechanics and Rock Engineering , 41 (3). pp. 421-444. ISSN 0723-2632

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Abstract

Considering ground instability problems of underground coal mines at shallow covers, this paper reviews and describes problems of optimal extraction of coal stuck below surface/subsurface constraints at Indian coal fields. Importance of thickness and quality of inter-burden between the working horizon and surface/subsurface constraints is discussed from a ground movement point of view during optimisation of coal recovery by underground mining beneath the constraints. A CIMFR, formerly CMRI idea, known as Wide Stall Method, was found suitable to overcome the limitations of non-effective-width based optimisation of recovery of coal, trapped in pillars below surface/subsurface objects, at shallow cover. The involved rock mechanics concept and three successful field trials of the Wide Stall Method under three different geo-mining conditions of the country are also briefly given in this paper.

Item Type:	Article
Uncontrolled Keywords:	Underground, recovery, wide-stall, coal-mining, surface/subsurface constraints.
Subjects:	Thick Seam Mining
Divisions:	UNSPECIFIED
Depositing User:	Dr. Satyendra Kumar Singh
Date Deposited:	15 Feb 2012 06:20
Last Modified:	15 Feb 2012 06:20
URI:	http://cimfr.csircentral.net/id/eprint/942

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