Development of the limestone mine which is sympathetic to the people and harmonises with the environment: Todaka mine: development of Kono and Yato mining area.

Tsukumi is the largest limestone supply region in Japan, with five companies quarrying 30 000 000 t/y in the area. The Todaka mine is located in the west of the region and currently produces 12 000 000 t/y, with the total amount of limestone produced so far being 370 000 000 t. The amount of limestone that can be excavated has decreased and development of a new mine is planned at Usuki. The new quarry will be designed and developed to a corporate philosophy which values the well- being of local residents and their environment by locating as much infrastructure as possible underground. The project is designed to have a production capacity of 12 000 000 t/y and will secure limestone supply for future generations. Details and illustrations are presented of the shaft and tunnel excavation processes and the underground installation of haulage, belt conveyors, crushing equipment, control room and electric room.
Tsukumi is the largest limestone supply region in Japan, with five companies quarrying 30 000 000 t/y in the area. The Todaka mine is located in the west of the region and currently produces 12 000 000 t/y, with the total amount of limestone produced so far being 370 000 000 t. The amount of limestone that can be excavated has decreased and development of a new mine is planned at Usuki. The new quarry will be designed and developed to a corporate philosophy which values the well- being of local residents and their environment by locating as much infrastructure as possible underground. The project is designed to have a production capacity of 12 000 000 t/y and will secure limestone supply for future generations. Details and illustrations are presented of the shaft and tunnel excavation processes and the underground installation of haulage, belt conveyors, crushing equipment, control room and electric room.