Drill rods made of hexagonal hot-rolled steel of 55C2, 3OHGSFA, 12XHZA, 30XMA, 28XGNZM, 40X2AUF and others break during perforator drilling. The rods break in the areas of shoulder, shank, cone part, as well as along the length of the main part of the hexagon. The most frequent breakages occur in the bump zone, which is obtained by hot-drilling on boring machines.

Increasing the durability of wear parts of equipment is an urgent task of all sectors of the economy. The problem is especially important for mining machines due to the operating conditions causing intensive destruction (wear, fractures, deformations) of parts replaced or restored during the repair of equipment.

In the branch laboratory of mechanization of labor-intensive work at the Department of Design of Mining Machines and Technology of Mechanical Engineering LMI developed a draft regulation on preventive maintenance of equipment of mica mines MPSM USSR ...

The analysis of the organization of repair work at mica mines shows that preventive maintenance of technological, lifting and transport, electrical, heat and power and other equipment is carried out both by two- and three-species structure, using in the cycle of average repair ...