Determination of in situ rock thermal properties and the improved simulation of the underground mine climate
No Thumbnail Available
Authors
Mousset-Jones, Pierre
Issue Date
1987
Type
Thesis
Language
en_US
Keywords
Mine Ventilation , Temperature , Rocks , Mines
Alternative Title
Abstract
The dissertation is directed at improving the accuracy of predicting the temperature of the workplace climate in underground mines. This has been approached in two ways. Firstly, since the accuracy of the input parameters to a mine climate simulation program is of paramount importance, new methods and equipment were developed to measure accurately three key in situ rock thermal properties, namely, thermal conductivity and diffusivity, and the surface heat transfer coefficient. The results of testing these methods in two underground mines showed that the methods worked and that the in situ values obtained were considerably different from those obtained in the laboratory, which are the ones typically used as input to a mine climate simulation. An improved procedure for calculating thermal diffusivity from measured field data was also developed and tested. Secondly, since a detailed review of the currently available mine climate simulation models indicated definite areas for improvement in all the models, changes in the algorithms were suggested. Verification of the validity of the accuracy of the input parameters was carried out using CLIMSIM to predict the air temperature for a number of mine scenarios of known conditions. Comparison between measured and predicted temperatures was excellent. In conclusion, the dissertation makes some significant advances in the measuring of in situ thermal rock properties and in the algorithms used in mine climate simulation. This should enable the mine ventilation engineer to design better, and in the most cost-effective manner, for hot working conditions in underground mines.
Description
Citation
Publisher
License
In Copyright(All Rights Reserved)