大規模土取事業場の開発

抄録

Kansai International Airport is to be constructed on an island in Osaka Bay created by landfill and a large volume of earth 150 million m³of earth, which must be prepared for this project in three years. To supply for the above, it was decided to carry out large-scale development of a 150 million-ton shale deposit at Nihon Cement Co., Ltd's Uchida quarry on Awaji Island, Hyogo Prefecture, in a short period of time.
For this purpose, Nihon Cement founded Kansai Asano Mining Co., Ltd., a wholly-owned subsidiary, in January, 1986, and development work was begun. Construction proceeded in accordance with a detailed plan. The monthly production goal of 1 million m3 (1.7 million ton) was reached after 18 months later.
The basic policy for development was as follows.
1. The latest technology was employed to the greatest extent possible to create a highly productive quarryon the largest scale in the shortest time.
2. Under planned investment, activities to protect safety and prevent environmental polution were carried out.
3. Large-scale facilities were installed, Central Control System and the Production Administration System (PAS) introduced, which is the computor monitoring andautmation system from the working face to the shipping port and production payability improved and production cost lowered.
4. Reclamation in which mining had been completed would be fully considered in cooperation with local authorities.
This paper was prepared based on investigation carried out to create the development and determine conditions related to the realization ofthe above project.