Location
Rolla, Missouri
Session Dates
11 Jun 1999 - 17 Jun 1999
Keywords and Phrases
Rock Temperature; Heat flow; Thermophysical Measurement
Abstract
A number of thermophysical measurements were carried out at the Meikle mine in Nevada in order to obtain new data concerning heat flows and wall temperatures in a hot mine. This was necessary to verify known methods of heat flow calculation and compare experimental with theoretical results. The Meikle mine was chosen because it is operated in an area of high rock temperature caused by the hydrothermal nature of the deposit and the presence of water at 60°C. The airflow rates in some of the inactive areas and the predicted background rock temperature at the mine are similar to those planned for the isolation of radioactive waste packages (RAW) in an underground repository. Therefore, the measurements in the mine made it possible to obtain real values of heatflows and temperatures in mine openings which will be similar to those expected in the drifts of a future RAW repository. Another objective of the measurement program was to conduct a comprehensive test of a new instrument, developed at the Institute of Engineering Thermophysics in Kiev, to measure the heat flow and temperature of rock. The advantage of the instrument consists in its ability to measure rock temperature and heat flow from strata directly on a rock surface without any need to drill holes or with minimum impact on the rock surface. This makes it possible to measure under conditions where the level of the energy transfer resulting from the rock temperature and moisture content are not affected by drilling or by any heat and mass exchange in a hole. The results obtained were used to calculate values of the overall heat transfer coefficient (the coefficient of unsteady heat exchange) for each measurement location. This coefficient is an important input parameter in most underground mine climate computer simulation programs.
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
Chernyak, Vilen P.; Malashenko, Eduard N.; and Mousset-Jones, Pierre, "Non-Destructive Field Measurements of Rock Temperature and Heat Flow in a Hot Mine" (1999). U.S. Mine Ventilation Symposium. 4.
https://scholarsmine.mst.edu/usmvs/8usmvs/8usmvs-theme9/4
Non-Destructive Field Measurements of Rock Temperature and Heat Flow in a Hot Mine
Rolla, Missouri
A number of thermophysical measurements were carried out at the Meikle mine in Nevada in order to obtain new data concerning heat flows and wall temperatures in a hot mine. This was necessary to verify known methods of heat flow calculation and compare experimental with theoretical results. The Meikle mine was chosen because it is operated in an area of high rock temperature caused by the hydrothermal nature of the deposit and the presence of water at 60°C. The airflow rates in some of the inactive areas and the predicted background rock temperature at the mine are similar to those planned for the isolation of radioactive waste packages (RAW) in an underground repository. Therefore, the measurements in the mine made it possible to obtain real values of heatflows and temperatures in mine openings which will be similar to those expected in the drifts of a future RAW repository. Another objective of the measurement program was to conduct a comprehensive test of a new instrument, developed at the Institute of Engineering Thermophysics in Kiev, to measure the heat flow and temperature of rock. The advantage of the instrument consists in its ability to measure rock temperature and heat flow from strata directly on a rock surface without any need to drill holes or with minimum impact on the rock surface. This makes it possible to measure under conditions where the level of the energy transfer resulting from the rock temperature and moisture content are not affected by drilling or by any heat and mass exchange in a hole. The results obtained were used to calculate values of the overall heat transfer coefficient (the coefficient of unsteady heat exchange) for each measurement location. This coefficient is an important input parameter in most underground mine climate computer simulation programs.
