METHOD FOR DEVELOPMENT OF STRATA DEPOSITS OF MINERALS Russian patent published in 1998 - IPC

FIELD: mining industry. SUBSTANCE: this can be used in mining sloping, steep, and steep-sloping coal seams with reducing ecological burden on natural medium. Initially worked is first seam in formation in direction from work face of bore-hole to its head, interval after interval, in maar-like stopes, thus forming along line of seam strike periodic succession of stoping chambers and temporary pillars of coal through preset interval. Created chambers are filled with organic waste of production which is burnt together with coal pillar. Then, worked-out space is preserved. Position of stope in every subsequent recovering bore-hole is combined relative to stope of preceding recovery bore-hole to value equal to half of maar width. EFFECT: high efficiency. 1 cl, 6 dwg