Assessing the Truckless Conveying Option in Mines

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DÜPERTHAL Sicherheitstechnik GmbH & Co. KG

Bench width and the excavator movement directly influence system capacity. In an attempt to avoid slew bearing exposure to impact loads from sizing, a current market trend is to remove superstructure slew, resulting in a less flexible machine. This in turn requires reduced bench widths and more frequent bench conveyor relocations.

How to Save Capital and Operation Costs with Truckless Mining

A capital and operating cost saving on the slew bearing is off-set by increased operating costs. Retaining the slew bearing can offer increased flexibility in operating with different bench widths as the mine plan varies over time. This requires a study for the site in question.

Considerations that are common to any system will still apply. The excavator must be suited to the desired bench height and be capable of mining interseam or pockets of inhomogeneous material while maintaining the overall required capacity.

How to Select the Fitting Sizing System

The focus of the sizing system is to reduce the ROM to the largest practical size for conveying. The sizer or crusher must be selected so as to ensure a new bottleneck isn’t created so soon after the excavator. Factors that must be considered include: Applying an IPCC system to both ore and waste removal may require a wide range of material properties to be handled.

A particular sizer may not be capable of handling both soft/sticky materials through to the hardest or most abrasive materials. A separate unit may need to be considered for either end of the material property range, depending on relative material quantities and ease of swapping the units.

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