池島炭鉱の蟇島区域開発と合理化

抄録

Undersea coal mine, Ikeshima operated by Matsushima Coal Mining Co., Ltd. is located in the western part of Nagasaki Prefecture.
It was a necessary condition to develop a new low sulfurous coal field for the regulation of SOx.
Development started in 1971 on the basis of the geological survey and the removal of the faces to Hikishima was performed within 1974.
It is now producing 1.35 million tons clean coal a year successfully.
New field is the area of the isle of Hikishima, 0.22km²and its circumference.
This paper describes on the following points.
(1) Geological survey
a) geophysical prospecting
b) deep boring on the sea
(2) Progress of the development
a) tunneling and shaft sinking (inlet, outlet and service wind)
b) mining method (long wall system combined with shield support and drum shearer)
c) ventilation, cooling and drainage system
(3) Plans in the future
a) development of the southern part of Hikishima area
b) rationalization of the transport system