池島炭鉱蟇島区域の開発について

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 conditionto develop a new low sulfurous coal field for the regulation of SOx.
The geological survey and development started in 1971 and the removal of the faces to Hikishima was performed within 1974.
It is now producing 1.2 million tons bituminous coal a year successfully.
New field is the area of the isle of Hikishima, 0.22km² and its circumference.
This paper describes on the following points.
(1) Geological survey
a) geophysical prospecting
b) deep boring on the sea
c) coal reserves
(2) Progress of the development
a) mining and transport system
b) mine ventilation, cooling and drainage system
c) shaftsinking by the short step and grouting method
(3) Questions in the future
a) confirmation of the proved coal reserves
b) rationalization of the transport system