Vivcharenko O. Substantiation of stopes stability parameters increase with use of yieldable frame-bolt system

Established laws weak layered rock's of a mine workings walls intensive load are defended from the side of two increased - reinforced by bolts of fibercrete load-bearing plate in roof and solid high-strength coal seam resulting in so-called "stamp effect", when loosened from strain concentrations weak rocks in walls are squeezed out into its cavity and thus deforming frame support's props; for this reason, stable formation of wide areas with plastic state in the frame's props material (in the area of props with length up to 0.5-0.6 m and in area of the canopy's lower part with length of 0.8-0.9 m) regardless near located rocks, cross-cut section of the working and applied special profile of support - SVP. Major reason is revealed - seperate work the bolts and frames of resistance to rock pressure manifistations. It is proved that due to spatial-yieldable connections of bolts and frames in single load-bearing system, a process of load self-control on the bearing elements is sustained, consequently load-bearing system, in general, approaches resource-saving state of the elements equal strength, adapting in space to rock pressure manifistations. Possibility of frame support metal consumption to 30% due to creation of spatial yieldable connections with the bolts is proved by analytical and experimental parameters and developed frame-bolt support calculation method. Calculation methodology lop that connects forecast of rock pressure manifestations with calculation of mechanical links and joints of their fixing on bolts and frames is developed.