著者

朝比奈 敬三

出版者

一般社団法人 資源・素材学会

雑誌

日本鉱業会誌 (ISSN:03694194)

巻号頁・発行日

vol.76, no.865, pp.444-452, 1960-07-25 (Released:2011-07-13)

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Chikubetu coal mine situated in Hokkaido, their area are about 3, 000 hectares, estimated available reserves about 43, 000, 000t, in which about 2, 900, 000t mined out.The largest difficulty we met on the rationalization process was how to deal with the mudstone, which we found under side of coal seam. This mudstone containes a lot of bentonite and very brittle.At the same time, it absorbs water very easily and increases itself.Therefore, it was very difficult to maintain the gallery, which was excarvated in this rock seam. As the first adequate measure for that, we excarvated the transportation gallery in the other harder floor rock, and we adopted the so called“Pocket mining system”.As above mentioned, our suitable measure for the brittle and absorbable mudstone rock seam led us to The mechanization in face and rationalization of the transportation system, and we could get the large output of coal in face.Well, we will describe this rationalization process in more detail as follows ; after we succeeded the“Kappe mining system”, we excarvated the great transportation cross cut as the first step to rationalization of Transportation system.(“Kappe mining system”is a mining system, in which we use the Kappe-iron beam, iron prop and armed conveyer)Then, as the second step, we tried to concentrate the coal face, rationalize the incline belt shaft and armed conveyer gate road. After that, we adopted the so called“slicing mining system”as we see it today.The great effects of rationalization were increase of output per man shift, and decrease of mining cost.The output per man shift became 7 times larger than before, total coal output 10 times, mining cost became 13 times.Without adaptation of any new machine and special mining method, we got these good effects by only effective using of our machines and installations.Now we think, our rationalization process till now was the only first step. And we must try to develop the new mining technic as the second step of our rationalization.We believe that, on the base of our above mentioned rationalization, we can develop the new mining Technic in our coal mine, for instance, adaptation of hydraulic prop, hyaraulic transportation of coal, new Technic of shaft sinking etc.Well, we got also good results of safety in coal mine, and this owed to the improvement of our technic and rationalization, we think.We mentioned above only the rationalization of technic, but we must stress here finally the adequateness of our labour management was the important element to the good reconstraction of our coal mine, which was ever facining a terrible crisis.