Hundreds of preliminary coal faces have already been provided.

The Pukchang Area Youth Coal Mining Complex and the Tokchon Area Coal Mining Complex take the lead in high-speed tunneling.

The complexes have concentrated all efforts and means on developing new coalfields with rich deposits and favorable conditions for mining.

The tunneling units at the Sunchon Area Youth Coal Mining Complex have overfulfilled their daily tunneling plans, raising the operation rate of equipment.

Similar successes are witnessed at Tukjang, Anju, Kujang and other coal mining complexes across the country.