A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Experience with gas draining by means of horizontal long hole method has shown that frontal angle of fractured zone in hanging wall of working seam is about 60°; gas drainage is begun when borehole will penetrate front of fractured zone; relation between depression in borehole and quantity of drained gas at casing head of borehole is almost linear; depression gas quantity graph is function of advance of long wall faces. English summary.
Experience with gas draining by means of horizontal long hole method has shown that frontal angle of fractured zone in hanging wall of working seam is about 60°; gas drainage is begun when borehole will penetrate front of fractured zone; relation between depression in borehole and quantity of drained gas at casing head of borehole is almost linear; depression gas quantity graph is function of advance of long wall faces. English summary.
On coal seam gas and gas drainage in Taiheiyo coal mine, Kushiro, Hokkaido
Min Met Inst Japan -- J
Sato, S. (author)
1961
5 pages
Article (Journal)
English
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Site effects in Kushiro during the 1993 Kushiro-oki and the 1994 Hokkaido Toho-oki earthquakes
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