FIELD: mining.
SUBSTANCE: striking rising and air slant shafts are sunk under dump at depth 30-40 m. There is formed an underground panel. Further, the procedure consists in driving an intake central entry connecting both shafts, and in driving boring-transport entries from the intake entry placing them at distance 6-8 m and connecting them with ventilation spouts at the borders of the panel. Then freshing-air ramps are driven to ventilation spouts from the side of the rising slant shaft; while the ventilation ramps are lowered to the ventilation spouts from the side of the air slant shaft. Screen sections with an L-shaped chute and a guide of a channel type are installed on supports of the boring-transport entries. Massif of dump is bored from the boring-transport entries with fans of vertical boreholes at 2-3 m distance one from the other. The boreholes are exploded and material of dump is mined from the borders of the panel to the intake entry. Broken muck is drawn by self flowing to conveyors located in entries.
EFFECT: reduced detrimental effect of mining operations to environment.
7 dwg
