Aggregates Manager

November 2013

Aggregates Manager Digital Magazine

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Page 11 of 86

A three-phased approach to screening, with the proper media used during each phase, can improve operational efficiency. Mining on the 'Pacific Rim' Keeping safety first and productivity high is the ultimate goal of any maintenance program. A three-stage blending process can yield maximum efficiency by Debbie McClung and prolong wear life. Japanese aggregate quarries differ from those in the United States in very subtle ways. by Kerry Clines, Contributing Editor 10 A ggregate mining in Japan is pretty much the same as it is in the United States — blasting, loading, hauling, etc. — but there are subtle differences that make it unique. Those differences became quite apparent during a recent visit to the Ryoukami-Kougyou Co. quarry, located in a nature park in the mountains near Ogano in the Chichibu District, approximately two hours from Tokyo. Ogano Quarry has been in operation since 1966 and employs 36 workers. It currently mines hard sandstone on 53 hectares of a 106-hectare (400+ acres) area available for mining. Differences and challenges One of the first things I noticed about this quarry was that it was upside down, so to speak. Most quarries found in the United States are holes in the AGGREGATES MANAGER November 2013 PlantProfile_AGRM1113.indd 10 10/17/13 2:05 PM

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