The Sunchon Area Youth Coal-mining Complex has increased tunnelling 1.2 times to secure dozens of reserve coal pits and produce more coal.
The secret of success is that it has consistently adhered to the principle of giving precedence to tunnelling.
The complex has set up new pits or enlarged existing ones specializing in tunnelling in the coal mines and generalized their advanced techniques and experiences.
A typical example is the introduction into all coal mines of the new drilling method created by the Kim Hyok Youth Shock Brigade of the Chonsong Youth Coal Mine.
The method is profitable as it reduces the number of blast holes and effective as it can accelerate the progress per cycle.
It is now applied to all tunnelling workteams, thus improving their tunnelling performance and increasing coal fields and the number of reserve pits of the complex as well.
The complex puts effort into consolidating the production foundations of relevant units without hindrance to the current production.
The Ryongdae Youth Coal Mine rebuilt the several kilometre-long transport line to enhance its coal transport capacity over 1.2 times in a short time.
By generalizing the experience of the Chonsong Youth Coal Mine which leads others in the mechanization of work in coal faces, the complex widely encourages all the coal mines and pits to conduct a vigorous mechanization drive, with the result that the lifespan of pits has been extended and the mining rate improved.
It also pays close attention to building up the capacity of units which are responsible for the production and supply of equipment, spare parts and cement needed for coal production.
The complex has adopted it as an important undertaking to positively cope with the unfavourable conditions in coal mines, produce more coal and improve the production and working conditions of coal miners.
For its good quality, cement produced by the building materials factory of the Unsan Coal Mine with an annual production capacity of tens of thousands of tons is widely used for making blocks needed for tunnel concretizing and concrete sleepers for the coal transport line. And coal mines built many dwelling houses with this cement and provide them to coal miners every year.
This year, the Sunchon Coal-mining Machine Factory has manufactured hundreds of coal wagons and sent them to coal mines, and the Unsan coal-mining equipment parts factory has produced different kinds of conveyor parts needed for the mechanization of coal pits.
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