| 摘要 |
<p>In the mining of subsurface friable mineral ore deposits, the invention provides a mine configuration and mining system wherein the mine has preferably three levels. The first operating level, is positioned substantially at the base of the deposit and has an interconnecting system of tunnels within which, mining apparatus operates. This level further in cludes conveyors adapted to receive loose ore and transport same to vertical shafts or ore passes which interconnect adjacent operating levels. The second operating level is primarily a collecting level, and is pos-itioned below the first, or mining level, to be parallel therewith. This second level has a tunnel system operatively associated with the vertical ore passes of the first level, and has conveyors which collect the loose ore and carry same to shafts for transport to a final, lower lever, from which the ore is removed from the mine. According to the invention, active mining is carried out by the known "Fixed Arch Shield" technique on only one level, the only other levels being ore collecting and haulage levels. There are no levels, or mine workings, above the first, mining level, only access and ventilation shafts. By utilizing this mining method and the preferred mine configuration, a complete ore deposit can be removed with minimal surface disturbance, and subsidence can be compensated for by distributing waste in a manner that is esthetically acceptable.</p> |
