PERSPECTIVE FOR IMPROVING THE METHODS OF FIXING MINE WORKINGS IN SALT ROCKS OF DIFFERENT STRENGTH

Ensuring the operability of the support of mine workings supported in various conditions of subsurface development is one of the most important and difficult to solve problems in the mining industry. The reason for the low stability of underground workings is the insufficient bearing capacity of anchors, especially with a long service life. A decrease in the bearing capacity of the anchor support over time occurs as a result of natural processes of deformation of rocks, a decrease in strength and corrosion of the support elements in aggressive environments. With the weakening of the bearing capacity of the anchors, the displacements of the rock contour of the workings increase, the number and width of cracks in the roof rocks increases, local rock falls and local blockages of mine workings appear. It is shown that the choice of the type, structure and parameters of the anchor support that ensures the stability of deep-lying underground mine workings in a complex-structured, multi-strength, multi-modular array of layered enclosing rocks with complex morphology and the presence of flexural disturbances of the silvinite formation of a potash deposit should be made differentially taking into account the geological structure of the array behind the contour of the workings, which determines the specifics of loading components along the length of the anchor.