Location
Rolla, Missouri
Session Dates
11 Jun 1999 - 17 Jun 1999
Keywords and Phrases
Conductivity; Diffusivity; VRT; Heat Flow; Lucky Friday Mine
Abstract
In many hot mines a large portion of the total heat load is associated with the surrounding strata. In order to maintain acceptable underground environmental conditions, the mine heat load must be controlled by the ventilating airstream, and in certain cases by mechanical refrigeration. To compute existing, or future heat additions from the surrounding rock, certain parameters must be -determined. These parameters include the rock thermal conductivity, thermal diffusivity, and the geothermal gradient (with relation to a virgin rock datum). These rock thermal parameters are typically estimated from published literature, or evaluated by laboratory or in-situ measurements. Presented in the paper are the results from a series of tests conducted at Hecla Mining Company's Lucky Friday Mine. These tests include in-situ measurements of rock thermal conductivity and geothermal gradient, which were performed in highly active sections of this deep silver mine. The results from the in-situ tests are compared with data obtained from laboratory testing of mine core samples. The methodology, measurement equipment, test data, and main results are described.
Department(s)
Mining Engineering
Meeting Name
8th U.S. Mine Ventilation Symposium
Publisher
University of Missouri--Rolla
Document Version
Final Version
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Duckworth, Ian J., "Rapid Evaluation of Rock Thermal Parameters at the Lucky Friday Mine" (1999). U.S. Mine Ventilation Symposium. 5.
https://scholarsmine.mst.edu/usmvs/8usmvs/8usmvs-theme9/5
Rapid Evaluation of Rock Thermal Parameters at the Lucky Friday Mine
Rolla, Missouri
In many hot mines a large portion of the total heat load is associated with the surrounding strata. In order to maintain acceptable underground environmental conditions, the mine heat load must be controlled by the ventilating airstream, and in certain cases by mechanical refrigeration. To compute existing, or future heat additions from the surrounding rock, certain parameters must be -determined. These parameters include the rock thermal conductivity, thermal diffusivity, and the geothermal gradient (with relation to a virgin rock datum). These rock thermal parameters are typically estimated from published literature, or evaluated by laboratory or in-situ measurements. Presented in the paper are the results from a series of tests conducted at Hecla Mining Company's Lucky Friday Mine. These tests include in-situ measurements of rock thermal conductivity and geothermal gradient, which were performed in highly active sections of this deep silver mine. The results from the in-situ tests are compared with data obtained from laboratory testing of mine core samples. The methodology, measurement equipment, test data, and main results are described.
