Study on Surrouding Rock Thermal Couductivity Experiment and Distribution of Temperature Field in Deep Roadway
|School||Liaoning Technical University|
|Keywords||Country rock Fluid-structure interaction Thermal conductivity Deep Drift Temperature distribution|
For deep mining , the main problem facing the formation high temperature to mining has brought a great deal of difficulty , as well as the impact of high-temperature operating environment . Based on this situation , we carry out a theoretical study of fluid-structure interaction effect , Experimental study of the thermal conductivity of surrounding rock in deep and roadway temperature distribution law . This thesis is divided into thermal conductivity testing , romantic and rock heat transfer numerical simulation of two parts . Experimental study of the thermal conductivity of the surrounding rock , deep rock as a sample study of the thermal conductivity of the fluid-structure interaction under the conditions of surrounding rock , and consider the actual situation of the roadway within the paper also studied the thermal conductivity of the fluid-structure interaction under the conditions of cast-in-place concrete coefficient. The study shows that when the temperature of the fluid increases , the coefficient of thermal conductivity of the surrounding rock and situ concrete is increased as the temperature of the fluid increases , the thermal conductivity and the temperature of the fluid is approximately linear ; When the traffic increases, the Surrounding began to decrease after the final thermal conductivity is always greater than the initial thermal conductivity and coefficient of thermal conductivity of the concrete first increases, reaches a certain level . Use of fluid-structure coupling under the conditions of test of the thermal conductivity of the surrounding rock and cast-in-place concrete , the thermal conductivity of the surrounding rock , and cast-in-place concrete support , simulation romantic and surrounding rock heat exchanger under conditions of deep roadway temperature field distribution . The simulation shows that the combined supporting system Merry applied does not change the the roadway temperature field symmetrical distribution shape ; changing the temperature field and temperature vector the seepage field applied , the symmetry of the original distribution of the state . In inverse seepage direction of the roadway isotherms intensive distribution is relatively loose in cis seepage direction isotherms , which show that the seepage along with thermal migration phenomenon .