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Measurement and analysis of virgin-rock temperature in Huanren Metal Mine

With the increase of mining depth, the heat-harm in high temperature deep mine has become increasingly prominent and become a new obstacle of the development of mining in China. As a nearly one-thousand-meter-depth mine, two pitheads in Huanren Metal Mine were taken as study objects in this paper, the deep-hole temperature measuring method was adopted to determine the rock temperature, the original rock temperature was analyzed theoretically, the ventilation cooling depth, the geothermal gradient and the distribution model of the rock temperature were calculated and verified, the temperature of the deep rock was predicted, some pertinent suggestions to control the thermal hazard were put forward. The results shown that the ventilation cooling depth of this mine is 20m, the geothermal gradient of the two pitheads is 2.3 o C/100m and 3.6 o C/100m, the model of the airflow temperature agreed well with the measured values. The research in this paper can provide theoretical and technical support of heat-harm prevention and control to Huanren mental mine and other similar mines.