Abstract
The Hiraki mine is situated in the southeastern part of the Hyogo prefecture, about 50km to the northwest of Osaka. Hiraki deposit is a large hydrothermal kaolin deposit in Japan, output of which is 5, 000-6, 000 tons/month. And Hiraki-Kaolin is mainly used for chinaware and glass-fiber.In the recent ten years, trackless underground mining have been adopted in Hiraki mine. Among underground mining methods, sublevel stoping, room and pillar method with underhand stoping supported by the rock bolts are working, and then mechanized cut and fill supported by the cable bolt is working too.This paper is described the underground mining method at Hiraki mine, under the following items.1. Sublevel stoping method.2. Underhand stoping supported by the rock bolts.3. Mechanized cut and fill.4. Measurements on the effect of rock bolting.5. Adopting reasons of cable bolting.6. Past records and Effects of cable bolting.
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