METHOD OF DEVELOPMENT OF ORE DEPOSITS Russian patent published in 2008 - IPC E21C41/22 E21F15/00 

FIELD: mining.

SUBSTANCE: invention refers to underground development of ore edge seams, particularly of thick and medium deposits. The method includes underground development of deposits 8 with excavation of ore in stope blocks and complete dressing of excavated ores at a concentration plant located underground, transportation and lifting of ore to a receiving hopper of the plant. Rejects of underground dressing are placed in open areas as fill, while produced concentrate is surfaced. To provide construction and operational conditions of underground concentration plant there is performed driving of mine shafts 1 for ventilation, lifting (lowering) of service personnel, of dressing equipment, materials, rejects, concentrates, transport, ventilation and auxiliary mine excavations for relocation of mineral raw material along the process stages of concentrating, for fresh air supply to work places and for withdrawal of polluted air. Process chambers 2, 3 are erected wherein dressing equipment is installed; also there are constructed storage chambers 9 for intermediate storage of current rejects. Location of the underground concentration plant is chosen from the side of the bottom layer of the deposit beyond influence area of seismic loads caused by blasting at ore excavation, along the directions of strike of deposit, transversely the strike and on specified depth after detailed geo-mechanic prospecting and considering minimum of costs. Depending on the output, rejects of concentration are placed in open areas in form of fills, the rest part is lifted to the surface. In order to significantly reduce volumes of the storage chambers, treatment of stope blocks is performed in layers with stowing of each processed layer with concentration rejects. The rational sphere of this invention implementation is underground development of ore deposits, particularly in mountainous areas, in densely populated areas, in regions with adverse climate, and also for deposits occurring at a considerable depth.

EFFECT: upgraded efficiency of underground development of edge seam thick and medium ore deposits and safe operation of underground concentration plant within long period.

1 dwg