空知炭鉱における露天掘の開発について

Abstract

Sorachi colliery was established by open coal mining system in 1977 and its production was 65, 000 t/year. Presently, two methods, bench cut and inclined stoping, are operated and the production is increased about 500, 000 t/year for the progress of mechanization.This paper is described the development of open coal mine at the colliery, under the following items.1) Outline of the colliery2) Present situation on the development.3) Geological survey for outcrop area4) Establishment of working face and regulation by forestry conservation5) Mining method6) Calculation of mining cost7) Reclamation