Incorporation of landform evolution modelling in mine rehabilitation planning

摘要

Computer simulations of the topographic evolution of the proposed post-mining rehabilitated landform for the ERA Ranger Mine, showed that for an unvegetated and unripped surface the landform after 1000 y would have numerous localised valleys (maximum depth chemical bounds 7.6 m) and fans (maximum depth chemical bounds 14.8 m). Simulated evolution of a vegetated and ripped landform showed maximum valley depth of 2.4 m and maximum deposition of 4.8 m. Modelling results, like these, can be used as a basis for decisions on the depth of tailings cover required to prevent tailings from being exposed to the environment within a certain time frame. Incorporation of landform evolution simulations in the design process may result in cost reduction while improving confidence in environmental protection mechanisms.