Singh, Arvind Kumar and Ahmad, I. and Sahay, N. and Varma, N. K. (2004) Air leakage through underground ventilation stoppings and in situ assessment of air leakage characteristics of remote filled cement concrete plug by tracer gas technique. Journal of the South African Institute of Mining and Metallurgy , 104 (2). pp. 101-106. ISSN 0038-223X

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Abstract

Between the main fan and the coalface in a mine a lot of air is lost through leakage at stoppings, doors, air-crossing etc. so that a much larger quantity of air has to be circulated by the fan in order that the stipulated quantity of air reaches the face. Stoppings are of vital importance not only for effective ventilation of underground mines but also for isolation of areas affected by fire or susceptible to brick in cement mortar. If the area is far from the pit or unapproachable, it is very difficult and sometime impossible to build these stoppings. To overcome these difficulties, particularly near fire affected zones, an alternate successful attempts was made in Indian mines to make a plug underground, from surface through borehole, using cement concrete. In this paper the salient features of the methodology adopted for construction of the plug and the experimental procedure for the measurements of air leakage through rows of ventilation stoppings in two mines viz. moira (Jambad and Kajora seams) and kuardi 11/12 (Niga seam) collieries of Eastern Coalfields Ltd. (ECL) have been incorporated. Results of experiments conducted at the Central Mining Research Institute (C.M.R.I.) to determine leakage through 25 and 38 cm thick brick stoppings are also discussed. Results of all these studies are compared, which show that the efficacy and reliability of the remote filled cement concrete plug in respect of air permeability is satisfactory.

Item Type:	Article
Subjects:	Mine Ventilation
Divisions:	UNSPECIFIED
Depositing User:	Dr. Satyendra Kumar Singh
Date Deposited:	03 Dec 2011 09:11
Last Modified:	03 Dec 2011 09:11
URI:	http://cimfr.csircentral.net/id/eprint/245

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