Abstract:

In order to study the mechanism of temperature response to groundwater in the fracture zone of mine floor, the authors established temperature field models of rock mass under the action of vertically flowing groundwater and air and the excess temperature distribution models by using heat transfer theory and combining with the mathematics and physics method. The effects of a variety of heat source were given, and the analytical solution of temperature and temperature gradient and excess temperature of the corresponding models were calculated. Results show that along the groundwater flowing direction, rock temperature gradient value of the initial segment is generally small, and the temperature gradient value of the termination section is generally larger.When the temperature gradient is the opposite with the groundwater flowing direction, amplitude variation of rock temperature gradient is relatively small. When the working faces is close to the structure containing groundwater, with the distance more close to the structure of conducting groundwater, the excess temperature of rock mass increases more rapidly at the same time, which reflects that curvature of temperature curve increases. Within a certain range, groundwater can affect the temperature gradient and the excess temperature of mine rock.

Key words: water-inrush sources, temperature field, discriminant model, fracture zone, simulation, ground water