ROCK PRESSURE CONTROL METHOD Russian patent published in 2012 - IPC E21C41/16 

FIELD: mining.

SUBSTANCE: method includes driving of development-temporary workings, working off of primordial chambers of tapered section, their filling with curing mixture forming artificial pillars, formation of massive ore pillar between artificial pillars. Rock pressure is reallocated on artificial pillars. Touchdown working is driven along ore pillar symmetry axis by contact with ore deposits in overlying roof rocks. Blasting wells are drilled from it radially within outlines of natural arches so that ends of these wells most accurately form sizes and surface of line of natural arches in compliance with estimated ultimate strength of overlying rock massif. Complete discharge of massive ore pillar is performed by induced caving of roof rock between artificial pillars on chambers expanding upwards, support of artificial pillars by caved rock is provided. Massive ore pillar stocks are developed with support of overlying roof rock by natural arches resting upon artificial pillars and retaining slopes formed near side surfaces of artificial pillars during loading of broken ore.

EFFECT: increasing reliability of rock pressure control and labour safety.

2 cl, 4 dwg