蒸発量計測によるトンネル壁面からの湧水量の測定(その2) : 現場計測

概要

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The distribution of evaporation rate on some rock walls of drifts in two mines, i.e. , the Stripa Mine, Sweden and the Tono Mine, Japan. Although the relative humidity in the drifts of the Stripa Mine was lower than 85%, the humidity in the drifts of the Tono Mine was higher than 95%. The obtained results were as follows; ( 1 ) The evaporation rate could be well measured even under the high humidity condition. ( 2 ) Considerable amount of water could evaporate from a dried fracture. ( 3 ) Evaporation rate spatially changed along a fracture. ( 4 ) The evaporation rate might be identical to the groundwater discharge comming through a rock mass if the permeability of rock mass was low, It was clearly found that the technique of the evaporation measurement was quite useful for mapping the groundwater discharge on a tunnel wall of the low permeable rock mass.
1990-03-25