ABSTRACT
When moving from the arch keystone of the drift towards the mined-out space, the stresses in the cap board decrease in absolute value and reach the minimum values ±10- 20 MPa near the yielding joist of the frame. In the peripheral area of the cap board from the side of virgin massif, there is a change in the sign of the bending moment with the action towards the roof, and the value σy remains at the level like for the arch keystone. In the resin-grouted roof bolts set in the immediate roof in the sides of mine working, an asymmetry of loading is manifested. The roof-bolts from the side of virgin massif are more loaded; in their reinforcement, the areas of considerable expansion of tensile stresses σx action are observed, which indicates the active resistance of the roof-bolts to the rocks displacement of the immediate roof into the cavity of mine working.
