Singh, K. B. and Singh, T.N. (1998) Ground Movements Over Longwall Workings in the Kamptee Coalfield, India. Engineering Geology, 50 (1-2). pp. 125-139. ISSN 0013-7952

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Abstract

Subsidence investigations were conducted over three superimposed longwall panels in the Kamptee coalfield of Central India. The extracted contiguous seams were lying below a water bearing unconfined aquifer. Filling of voids with sand hydraulically was practised to avoid a sudden inrush of water into the under-ground workings through ground-movement induced cracks. The non-effective width of extraction varied between 0.55 and 0.61 times the thickness of intact rockmass in the overburden. The maximum subsidence, slope, compressive and tensile strains were 9% of extraction thickness, 6.1, 6.6 and 5.3 mm m-1, respectively. The angle of draw was influenced by the presence of a fault and composition of superincumbent strata. The ground movements lowered water table by 6.5 m in the unconfined aquifer due to the mining.

Item Type:	Article
Uncontrolled Keywords:	Ground movements; Longwall mining; Overburden composition; Residual subsidence; Unconfined aquifer
Subjects:	Mine Subsidence
Divisions:	UNSPECIFIED
Depositing User:	Dr. Satyendra Kumar Singh
Date Deposited:	14 Jan 2012 06:09
Last Modified:	14 Jan 2012 06:09
URI:	http://cimfr.csircentral.net/id/eprint/661

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