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 goaf, 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, advances similarly to longwall extraction — in parallel cuts in one direction; the face area with a width of 3.4–3.8 m is not supported at all.

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