On the Mine Water in the Joloan Iwaki Coal Mine

Abstract

The main working faces are located in the thermal waterzone and there are much spout in the underground. The spout is thermal water which highest temperature is 67 digree (C). Recent average amount of drainage and actual coal production in the underground warking faces:
1955 1956 1957 1958 1959 1960
84.3m³/min 82.2 88.1 98.5 97.8 94.5
1, 228, 503t 1, 466, 800t 1, 543, 600t 1, 355, 900t 1, 226, 400t 1, 446, 100t
The great spout over 1 cubic meter per minutes 64 times. The most important thing for coal production, in this mine is to take necessary measure to meet this situation. After those miserable experience, we reached the conclusion to undertake large scale drainage, to make water-level lower and to make water pressure lower by which we can work absolutely safely. In the study of geological stractures and chemical characters of the thermal water in the laban Iwaki coal mine, it become clear that source of the thermal water comes frome the seepage water, fossil water and magamatic water.