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11 June 15 December 18 April ALLIED POWERS beds bishi Mining Company Byutan incline carbon caused the death Chief Engineer Chinese Classified coal dust coal field Coal Mining Company collieries operated COLLIERY DISASTER Colliery explosion Company in Kyushu conditions underground conveyor corporation Courrieres crews DISASTER 26 April disaster recorded Division driven electric employed underground fans formation haulage high tension history of coal Hogyo Collieries Home Islands Honkeiko Colliery Honongah ignition point Japanese companies Japanese mining Japanese occupation Japanese-operated killed Korean Liaison long wall face loss lost their lives Magnetic switch Manchuria Manchurian Coal Mining Manchurian Industrial Development meters metric miners Mining operations NATURAL RESOURCES SECTION occurred officials Operated by Japanese operating staff Plate plosion portal Prior production propagation removed REPORT NUMBER 29 Report Report Report RESOURCES SECTION REPORT rock tunnel seam serious mine disasters Situation in Japan slope suppressed SUPREME COMMANDER surface Tashan Ventilation