Research into mine working fastening technology in the zones of increased rock pressure behind the longwall face to ensure safe mining operations

Purpose. The research aims to substantiate the technological solutions to ensure the rock mass stability through a rational approach to strengthening the zones of increased rock pressure behind the longwall face. Methods. To achieve the purpose set, a complex research method is used, which includes an analysis of practical experience in mining medium-thickness flat-lying coal seams, a study of the stress-strain state of rocks above the coal mass marginal area, and mine research into the influence of mining-technical factors on the state of zonal preparatory workings. Findings. The patterns of stress influence on the mine working stability have been determined depending on the mining-technological parameters of mining operations. Empirical dependences of the stress influence on the mine working stability have been revealed. The parameters of stress influence on the mine working stability have been found depending on the mining-technological parameters of mining operations. Originality. The conducted research made it possible to determine the degree of influence of mining-technical conditions of mining operations on deformations in border rocks with various types of support in extraction workings, which helps to understand the dynamics of deformation processes occurring in the coal-rock mass surrounding mine workings maintained behind the longwall face. Practical implications. The revealed deformation patterns can be used in calculating the rock pressure manifestations when conducting mine workings on deep levels under various mining-technical conditions of mining operations, which has practical significance for ensuring the stability and safety of maintaining mine workings at the stage of mining operations. The use of roof-bolt support is proposed as an effective means not only to ensure stability, but also to maintain safe operating conditions in mine workings.