TY - JOUR
TI - An experimental investigation of transient heat transfer in surrounding rock mass of high geothermal roadway
AU - Zhang Yuan
AU - Wan Zhijun
AU - Gu Bin
AU - Zhou Changbing
JN - Thermal Science
PY - 2016
VL - 20
IS - 6
SP - 2149
EP - 2158
PT - Article
AB - A self-designed experimental installation for transient heat transfer in the  modelling surrounding rock mass of high geothermal roadways was elaborated in  this paper. By utilizing the new installation, the temperature variation  rules in surrounding rock mass of the high geothermal roadway during  mechanical ventilation were studied. The results show that the roadway wall  temperature decreases dramatically at the early stage of ventilation, and the  temperature at every position of the surrounding rock mass is decreasing  constantly with time passing by. From roadway wall to deep area, the  temperature gradually increases until reaching original rock temperature. The  relationship between dimensionless temperature and dimensionless radius  demonstrates approximately exponential function. Meanwhile, the temperature  disturbance range in the simulated surrounding rock mass extends gradually  from the roadway wall to deep area in the surrounding rock mass. Besides, as  the air velocity increases, heat loss in the surrounding rock mass rises and  the ratio of temperature reduction becomes larger, the speed of disturbance  range expansion also gets faster.