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 |
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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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