Mashurka S. Geomechanical justification of combined support parameters and the method for protection of workings being reused in complex mining-geological conditions

The objective of the work is to justify the rational parameters of the system "rock mass-working-protective construction" that allows efficient reuse of mine workings in complex conditions. For the first time, the patterns of deformation of the rock mass around the workings for the mine "Yuzhnodonbasskaya No 1" have been established, that allowed justify parameters of mine support and protective structures for reuse purposes. The index of repair ability is proposed, which determines the degree of complexity for maintaining of mine working and represents a new comprehensive criterion of geomechanical feasibility for the systems of ensuring stability of workings. The regularities of the change of volumetric loosening of the rock mass around the working in the conditions of large displacements of rock contour are established. A numerical studies, which allowed determine parameters of the combined support and protective construction to ensure stability of mine workings at all stages of its operation, was carried out.