Determining the dimensions of inter-chamber pillars

Abstract

The issue of determining the size of inter-chamber pillars is a very important issue, since it is closely related to issues of mineral loss. Factors such as the width of the chambers, the length of the chambers, the height of the pillar, the cross-sectional shape of the pillar, the physical and mechanical characteristics of the pillar rock should be reflected directly in the calculation formulas, and such factors as the nature of the complex of roof and soil rocks, the characteristics of the immediate roof and soil, the presence of aquifers, the shape and area of the excavation site - should be reflected in determining the magnitude of the load on the pillar and the nature of the pillar's work and, finally, the duration of the pillar's operation, work with or without backfilling of chambers, excavation of chambers with or without the use of blasting operations should be taken into account when choosing a safety factor.