INVESTIGATION OF THE STRESSED STATE OF THE MASSIF AROUND THE PREPARATORY MINE WORKINGS

Determination of deformation of working support in mining passages depends on mining and geological operating conditions. The studies have allowed establishing the degree of influence of mining and technological factors on the effectiveness of the bolting of excavation.  The conducted studies allowed us to determine the degree of influence of mining and technical conditions of development on displacements in contiguous rocks with various types of support in excavation workings. The revealed patterns of deformations can be used to calculate the manifestations of rock pressure during workings under various mining operating conditions. Studies of geomechanical conditions for maintaining mine workings with an assessment of the technological principles of using means of fastening mine workings have been carried out. The conducted studies make it possible to predict with sufficient reliability the displacement of the contours of preparatory workings during geomechanical processes. The revealed patterns of changes in the stress-strain state of coal rock massifs (displacements, stresses, fracture zones), depending on the main mining and geological and mining engineering factors, will allow in specific operating conditions to establish optimal fastening parameters to increase the stability of preparatory mine workings. The work done will allow us to improve existing technologies for effective and safe consolidation of contour rocks during mining in shallow and inclined coal seams, adapting to changing geological and mining operating conditions.