The Kaechon Area Coal-mining Complex works to tap every reserve and potential in order to increase production.
The Kaechon Coal-mining Machine Factory has an iron prop production base.
“At present most of coal mines use wooden props, which greatly affects the protection of forest resources and afforestation of the country. Moreover, they have short serviceable life to have a negative impact on coal production,” said the manager of the factory.
The factory turned its eye on iron prop production to reduce its dependence on wooden props in coal production.
Technicians developed a design for manufacturing iron props with the rolling mill at the factory, but the materials thus produced cracked in the process of rolling.
They found a possibility in one of ten pieces of the materials that did not break, so they went on with trial production by changing melting and rolling methods each time and finally succeeded in producing a strong iron prop for pit.
As the iron prop helps double the serviceable life of coal pit, the demand for it is on the rise not only in the complex but at other coal production units.
At present the factory is pressing on with the manufacture of a loader that is convenient to use in pit.
Meanwhile, the Joyang Coal Mine strives to secure sufficient quantities of various spare parts.
It recycles every used thing such as chain link, drill and rubber to make machine parts. Among them are the chain of conveyor belt and scraper that are important in carrying coal.
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