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| | Abstract | | In-situ heater test has been conducted to evaluate the influence of high temperature in an underground facility at a depth of 50m. Resistivity monitoring is thought to be effective to map the extent of the high temperature zone. We have conducted resistivity tomography during the heater test. The results demonstrated that low resistivity zone gradually expanded from near the heated area with the heating started. Resistivity of rock is proportional to that of pore water which is known to decrease with increasing temperature. This suggests that high temperature zone is detected and spatial distribution of temperature can be mapped by resistivity tomography. |
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