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Safe work practices of mine workings are provided by fixation of working surface. The ability and technical requirements to frictional fixation rock bolts are determined by ‘Change N°1’ for GOST 31559-2012 along with traditional rock bolts. Analysis of its construction has shown that the main indicator which determines reliable operation is load-bearing capacity and it is determined as minimum value of three values of load capability: a rod of the rock bolt, a limit stop on a rock bolt and a support plate. It is stated that load-bearing capacity of frictional fixation rock bolt must match load capability of the limit stop on a rock bolt. Maintenance of the initial indexes of load capability for the whole period of service is being provided by application of protective coatings on all rock bolt surfaces. Practicability of the coating based on high-density polyethylene compositions 600-800 μm thick has been proved as a result of the performed research. Comparative analysis of resistibility to concentrated alkaline and saline environment has shown retention of tensile strength.

Formation of Requirements of Reliable Operation of Frictional Fixation Rock Bolts