Yang X.,China University of Mining and Technology |
Han Q.,China University of Mining and Technology |
Tian Y.,China University of Mining and Technology |
Ma J.,China University of Mining and Technology |
And 3 more authors.
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | Year: 2013
Sanhejian Coal Mine in Xuzhou is one of the mines in China which are seriously threatened by the high-temperature, with rock temperature of 40°C and the roadway temperature of 33°C-34°C below the elevation of -700 m. The heat-hazard mechanism of the mine is the key to research in controlling the thermal damage;however the research of the heat-hazard mechanism is focused on the geologic structure and the magmation, and the research of the mechanism about the temperature field influenced by the Ordovician water is very little. First, the mechanism of the upwelling of the Ordovician water at 21102working face was analyzed. And then the effect of the upwelling of the Ordovician water on the geothermal field of Sanhejian Mine was discussed. At last, the geothermal field of the Sanhejian Mine effected by the hot Ordovician water was divided into three districts, following with the cooling measures. Some conclusions are drawn as follows. (1) The upwelling of the Ordovician water has a great effect on the geothermal field of the Sanhejian Mine;and it is a important heat-hazard mechanism of this mine. (2) The water passages is the Sunshidian fault, and the Ordovician water of Sanhejian Mine is supplied by the water from the axis department of Tengxian anticline, so the distance between the supplying area and the gushing area benefits the upwelling of the Ordovician water at the 21102working face. (3) The earth temperature of every level upper aquifer rises obviously after the swarming of Ordovician water and a negative correlation between the temperature rising index and the depth is found. (4) The research areas are classified into three types, that is IIa(37°C-45°C), IIb(45°C-50°C) and IIc(50°C-55°C). The results play a guiding role in managing the heat-hazard in Sanhejian Coal Mine. Source