Varma, N. K. and Gupta, M.L. (1999) In-situ measurement of thermal diffusivity in underground coal mines. Journal of Mines, Metals & Fuels, 47 (7&8). pp. 172-176. ISSN 0022-2755

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Abstract

Existing methods of in-situ determination of thermal diffusivity are critically reviewed. A new method based on cooling of rock, instead of heating, is presented. Formulae has been derived to determine thermal diffusivity of rock massif from only nine temperature measurements in a single drill hole. However, for accurancy more measurements are recommended. A simple computer programme written in Fortran77 is described which requires negligible amount of computer memory space. It generates all possible 3x3 matrices required to compute a diffusivity value, systematically scans them, calculates thermal diffusivity from viable ones and performs statistical calculations on them. Program output consists of number of diffusivity values calculated, their mean, standard deviation and range. An example from actual field measurement is also given.

Item Type:	Article
Subjects:	Mine Ventilation
Divisions:	UNSPECIFIED
Depositing User:	Dr. Satyendra Kumar Singh
Date Deposited:	28 Nov 2011 10:55
Last Modified:	28 Nov 2011 10:55
URI:	http://cimfr.csircentral.net/id/eprint/173

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