OREANDA-NEWS. Yenakiieve Iron & Steel Works’ Makiivka Branch mastered the production of thread bar, the use of which simplifies and accelerates the process of rock-bolting - an advanced method for affixing mine tunnel roofs.

Rock bolt works immediately after installation, improving mine tunnel stability as rock stratification is prevented and the size of inelastic deformation areas is reduced.

Sales have already started of thread bar with a strength class of 500 MPa and diameters of 20 mm and 22 mm. Rock bolts with Metinvest’s thread bar are done at Krasnodon Coal and DTEK’s mines.

Yenakiieve Iron & Steel Works’ Makiivka Branch also rolled a test batch of thread bar with a strength class of 600 MPa and a diameter of 20 mm. This product will allow to reducе the metal used in mine rock bolts by another 17%. Development of the regulatory documents and industrial trials for this product are planned in the nearest future.

“Thread bar is in demand on the domestic market,” said Metinvest Sales Director Dmitriy Nikolaenko. “In the near future, we are planning to make this product available for Russian customers too. We maintain an active dialogue with our buyers and systematically complement our product lines with in demand items. For example, around 30 new products will be launched this year.”