The Unpha Mine has stepped up the technical innovation with main stress put on improving the grade of concentrated ore and the degree of concentrating recovery.

The Yongyu Mine remodeled major equipment into energy-saving one by arousing the creative enthusiasm and activeness of technicians and skilled workers and put the maintenance and repair of mine cars and crushers on a high level.

Phungnyon and Jungsan mines are increasing the productivity while solving technical problems arising in ensuring the full operation of winches, pumps and other machines.

The December 5 Youth Mine repaired the refrigerating compressor according to the technical regulations, thus registering 120 percent of its daily output.