Effect of Oil Sand Mining Operations on Haul Truck Dump Body Design

CIM Montreal 2003
Khaled Obaia,
Abstract Mobile equipment in oil sand mining operations experience more maintenance problems than similar equipment in other surface mines, due to soft underfoot conditions. Oil sand properties are known to vary with temperature, bitumen content and previous loading cycles. One of the challenges is the widely variable underfoot pressure which supports shovels and trucks.

In case of a heavy hauler driving on in-pit roads, each tire is supported by a different ground stiffness resulting in an apparent uneven surface. Driving over uneven ground causes twist in the truck frame, which is transmitted to the dump body. Through a finite element analysis of a haul truck dump body, it was shown that slight frame twists produce localized stresses in the intersections of the floor stiffeners. These stresses are at times greater than those resulting from the maximum ore weight and are primarily responsible for cracking in these intersections.

Syncrude maintains high quality haul roads, which are constructed of gravel, and goes through every effort to keep the shovel pit as smooth as possible. This problem cannot be avoided through operational practices only and must also be accounted for in the design of haul truck bodies.
Keywords: Crack, oilsand, finite element, Syncrude, Truck, Maintenance, body, underfoot, FEA, hauler
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