The complex organized the workshop for generalizing the successes and experience of advanced units in a premeditated manner and constantly increased the blasting efficiency in tunneling.

Amid the vigorous high-speed tunneling movement, the members of the Kim Kwang Chol Youth Shock Brigade registered a high record every day through continuous drilling and blasting.

The Ryongdung Coal Mine carried out the overhaul of a 1 000-odd meter-long hauling track properly and pushed ahead with the work for changing the transport process with belt at a final stage.

Colliers of the Ryongmun Coal Mine introduced new coal mining methods by pooling efforts with technicians, thus producing more coal than the planned every day.

The Ryongsu Coal Mine also renovated the production process capable of supplying raw materials necessary for manufacture and maintenance of coal trucks with their own efforts and is increasing the productivity by constantly raising the proportion of mechanization in the pit work.