Ways of reducing commercial deposits loss in interstep and intermediate pillars during alluvial dredging

International Conference on Innovations and Prospects of Development of Mining Machinery and Electrical Engineering 2018

矿业工程;电工学

Talgamer, B.L.^1 ; Snetkov, V.I.^1 ; Dudinskiy, F.V.^1

Irkutsk National Research Technical University, Russia^1

关键词: Alluvial deposits;    Design change;    High-efficiency;    Low grade;    Mining conditions;    Parametric control;    Qualitative characteristics;    Valuable component;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/194/10/102003/pdf
DOI  :  10.1088/1755-1315/194/10/102003

来源: IOP

【 摘 要 】

The drawbacks of the alluvial dredging are mining loses of commercial deposits, which increase due to complication of mining conditions and depth increase of the deposits occurrence. The greatest losses appear in interstep and intermediate pillars during alluvial dredging; where up to 10 - 15 % mineral deposits are left. These losses can be reduced by dredge design changes, additional extraction units; more complicated maneuvering does not provide high efficiency of dredging at more complex alluvial deposits. It is suggested to reduce a significant part of mining losses by preliminary preparation of the polygon to dredging, with parametric control and qualitative characteristics of the productive stratum, as well as by forming interstep and intermediate pillars from stripping soils or low-grade productive sediments. Preliminary mechanical sand loosening allows using dredge as a cleaning unit and reduces processing loss of valuable components.