環境保全を基幹とした伊吹石灰石鉱山の総合開発
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概要
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IBUKI Limestone Quarry started operation from 1952. In order to obtain limestone ore resources, the exploitation plot plan for the upper lever was first considered in early 1970s. This area is adjacent to the natural park and natural monument area where high mountain plants are growing in groups. Prior to making the plot plan, the exploitation concept was discussed with experts and local communities and determined with regard to the natural environment. According to this concept, the excavating system including restoration on the planting and transporting system of limestone ore were developed. In order to verify restoration by planting and also to confirm the coexistence with mining work, the planting work had been performed since 1971 at the already excavated area below 1,000 meter level. On the other hand, the facilities for ore transportation were installed underground so that it cannot affect the existing landscape. Although rock had enough strength, strength of rock mass was not high due to considerable cracks observed. When the vertical ore shaft was constructed in the cracked rock, the diameter of the shaft was designed as a small scale and the walls were reinforced with concrete and steel ringing. To avoid choking in the shaft, the rock size supplied to the shaft is made under 300 mm using a mobile crushing plant. The operations in the upper limestone quarry was started in 1978, then the restoration planting at the upper limestone quarry was started in 1979. At the beginning of operation, there are many unexpected troubles in operations. This paper describes a design of exploitation which agreed with the concept, countermeasure for the troubles in operations, additional construction work to improve the environment against dust emission and the restored results in the excavated area.
- 社団法人 資源・素材学会の論文
- 1999-07-25