Temperature field distribution of surrounding rock in deep high-temperature roadway under seepage
To investigate the temperature distribution of the surrounding rock in a deep high-temperature roadway under seepage,the temperature of the raw rock in the middle transportation roadway of 0108(V)was monitored by using the deep-hole temperature measurement method.Simulations and analyses were performed using Fluent CFD software to investigate the effects of varying surrounding rock porosity,seepage velocity,and water temperature on the temperature field of the surrounding rock in a deep roadway.The findings indicate that the original rock temperature is 35.6 ℃,belonging to the first level of heat damage area;The distribution characteristics of the temperature field of the enclosing rock under seepage are different from those of the enclosing rock without seepage,distribution of isotherms of the temperature field of the enclosing rock under seepage along the seepage direction;Surrounding rock porosities have no significant effect on the distribution characteristics of the surrounding rock temperature field under seepage,because as the surrounding rock porosity increases,the range of the disturbed zone of the surrounding rock temperature field and the radius of the heat tuning circle continuously increase,and the radial temperature of the surrounding rock and the temperature of the tunnel wall decrease;Seepage velocity has a great influence on the distribution characteristics of the surrounding rock temperature field,when the seepage velocity ≥2 × 10-8 m/s,its isotherms are distributed along the seepage direction,and when the seepage velocity＜2 × 10-8 m/s,the isotherms are said to be symmetrically distributed.As the seepage velocity increases,the area of the disturbed zone of the surrounding rock temperature field,the radius of the heat tuning circle,and the temperature of the tunnel wall increase,and the radial temperature of the surrounding rock decreases;Water flow temperatures have no significant effect on the distribution mode of the surrounding rock temperature field,the radius of the heat-regulating circle,and the area of the disturbed zone of the temperature field under the influence of seepage.The radial temperature and the wall temperature of the surrounding rock increase as the seepage water temperature increases.
safety engineeringdeep roadwayseepage effecttemperature field of surrounding rocknumerical simulation
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