Influence of some factors on strength and stability of supporting walls

Abstract

In the practice of ore deposit development, the need to maintain the rocks surrounding the ore body being mined in static equilibrium for a long period of time arises in connection with cleaning operations under structures, reservoirs or under active open pits. This can be accomplished by leaving ore pillars of sufficient size or by excavating all of the ore but constructing artificial supports to keep the surrounding rocks stable. In the first case, the ore is extracted from the chambers by highly efficient systems, while the ore pillars remain or, after they are no longer needed, are extracted, but usually by low-performance systems, under difficult conditions and with great loss. In the second case, when artificial supports are used, their erection is associated with additional work and costs.