The second-stage high-speed tunneling contest began throughout the Ministry of Coal Industry.

Hundreds of preliminary coal cutting faces were provided during the first-stage high-speed tunneling contest and the tunneling speed increased 1.2 times more than the same period of last year.

Several coal mines of the Sunchon Area Youth Coal Mining Complex and the Tokchon Area Coal Mining Complex have increased the proportion of mechanization in face work and strengthened the ties between processes.

The Pukchang Area Youth Coal Mining Complex is turning the technical innovation work for introducing advanced blasting methods into the one of the masses themselves.

The Tukjang, Anju and Kaechon area coal mining complexes are boosting tunneling through the socialist emulation among tunneling units.