| 摘要 |
A method for working series of gentle ore deposits, which includes the preparation and advanced mining of the overlying series ore body by panels with panel reserves extracting by chambers, interchamber pillars forming and their further roof fall to cause the roof fall of top rocks and filling of chamber goaf with broken-down rocks, the mining of underlying series ore body by panels with panel reserves extracting by chambers, interchamber pillars forming and their further roof fall to cause the roof fall of top rocks and filling of chamber goaf with broken-down rocks with the difference that interchmber pillars under the working of the overlying ore body are to be formed in the actual mining zone where the pressure on them does not exceed by 30-35%the full pressure on the interchamber pillars calculated on condition of their saving during panel chamber reserves working and make the interchamber pillars extracting when the pressure on interchamber pillars ready to be extracted should reach 35-45% of the full pressure on the interchamber pillars calculated on condition of their saving during panel chamber reserves working, for all this the mining of each of underlying series ore body is made with lag what ensures the chamber reserves extracting and formed pillars extracting in the discharge zone, and the width of goaf is kept up within the width of the dome of natural equilibrium, formed in the broken-down rocks during the overlying ore body mining. |
