常磐茨城炭礦の操業合理化と深部開発について

抄録

Coals produced from Ibaragi Coal Field are low grade and these are using as general fuels. The coal nature is fragile and is high frequancy of the spontcineous combustion.
As the geological feature is compartively worse, the underground support which being suffered by the heavy pressure is uneasy to keeping. When reached around S·L 300m, many coal mines had invited the managing infermities, compelled the to the abolition of their mines. Rivising this dificulty, we planed and have being practice the following six items since we located mine office here.
1) to promote the cooperation of management and labor, and to enforce the technical education for foremen. 2) to intensify the face and mechanical mining. 3) to simplify the traffic system, and to study the support. 4) to make the face working conditions more better. 5) to control the quality of coal. 6) to utilize low grade coals.
Then the output per man increased up 2.5 times than the time when started, and at the present the monthly output is 75, 000-80, 000ton. On the other hand, the up-to-date preparation was established. Our untiring efforts on these rationalization both within and without mine and settling a basic stability on business conditions.