Analysis of Heat Transfer Characteristics of Fractured Surrounding Rock in Deep Underground Spaces

Table 2

Measured parameters.

Measured parameter	Type	Measurement range	Accuracy
Temperature	PT 100	-40°C~150°C	±0.5°C
Relative humidity	Capacitive	0%~100% RH	±2%
airflow velocity	Hot wire	0 m/s~15 m/s	±0.2 m/s