Известия Томского политехнического университета: Инжиниринг георесурсов (Jul 2022)
STUDY OF ROCK TEMPERATURE DISTRUBUTION IN THE BEREZOVSKY MINE FIELD OF BELARUSKALI COMPANY
Abstract
The relevance. An increase in the depth of mining leads to a natural growth in the temperature of rocks and air temperature in the working areas. The most effective measure to reduce air temperatures is the use of air conditioning systems. The availability of data on the thermal properties of rocks at the stage of pre-design study makes it possible to avoid unreasonable reserves of refrigeration equipment capacity, reducing capital and operating costs. The main aim of the research is to study rock temperature distribution in the Berezovsky mine field of Belaruskali company to determine a geothermal step. Object of the research is the Berezovsky mine field of Belaruskali company. Methods of the study include experimental measurements of the temperature of rocks in boreholes drilled in mine workings at different depths, statistical data processing, and approximation of the temperature field as a function of spatial coordinates. Results. The temperatures of the virgin rock mass are investigated, an approximating dependence of the expected temperature of rocks at a given depth is obtained. The value of the geothermal step obtained in the course of the study was 64,9 m/°С. This value exceeds the values that were calculated according to the instructions for calculating the required amount of air for the mine and the previous data on the well thermometry. At that, the obtained value corresponds to the data on the map of the geothermal stage in the upper part of the earth's crust in the USSR. The study of rock mass temperature for horizontal section of the mine field shows that temperature depends significantly on all three coordinates. This indicates the presence of lateral variability of the temperature field, which cannot be explained solely by seam gradient.
Keywords
