Peculiarities of manifestation of rock pressure in the chamber-lava system of mining at the mines of the Slantsy Combine

Abstract

The combined chamber-lava system combines elements of the pillar and chamber systems. The system has the following characteristic features: the main roof is supported for a long time by specially left supporting pillars; to increase the bearing capacity of the immediate roof and to control the condition of the roof in the excavated space, a light wooden support is installed, designed to support only the lower layer of the immediate roof with a thickness of no more than 4 m, the face of the chamber-lava with a total length of up to 215 m is moved in the same way as the longwall face excavation - by parallel drifts in one direction; the bottom-hole space is not fixed at all, and its width is 3.4-3.8 m.