Abstract
The Heiwa Coal Mine now being worked, consists of 3 mines, Heiwa No.1, Heiwa No.2, and Mayachi. Heiwa No.2 Mine began its operation in August 1954, and this new mine is equipped with modern installations on its surface and underground. At this mine, the slicing-longwallsystem is applied to work on the thick coal seam, 4.10m in width at a dip of 100. By this slicing method, the thick seam is separated into the upper and lower parts, and simultaneously worked on at regular intervals. For haulage, the 500113 tandem-type winding skip is installed in the incline-shaft.At the Mayachi Mine, the full-packing longwall system is used to work on the Coal seam, 3.0-5.0m thickness at 60°-70°dip. After the lower part of the seam is worked on and 2 or 3 months later, the upper part is worked on to complete. The Hemscheidt Curved-Band Conveyor is used for haulage of stowing material.The kind of coal produced at the 3 mines is coking coal and especially, the special-fine coal of Heiwa No.1 and No.2 Mine having only 6.5%ash, is noted on the most superior cokemaking coal in Japan. coal in Japan.
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