timber mat

timber mat

[′tim·bər ′mat]
(mining engineering)
Broken timber forming the roof of an ore deposit that is being extracted by a caving method, such as top slicing.
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A comparable hardwood timber mat weighs approximately 7,500 pounds.
This placed the drill site in an environmentally sensitive area, which required special federal and state permits and the installation of a timber mat drill pad before the project could proceed.
Other major uses of hardwood roundwood in the Southern region include cross ties, pallet stock, container and structural veneer, timber mats, and board roads.
On the job site in Vietnam, the 31000 was set up with steel as opposed to traditional timber mats, which further lowered the ground-bearing pressure from 70 tonnes per square metre to 30 tonnes per square metre.
Vince Hagan plants feature rigid truss design that holds up to the rigors of harsh travel and jobsite conditions and ensures fast set-up; engineering to bear on steel plates or timber mats versus temporary concrete foundations; and, large "in-truss" cement and aggregate storage.
The terrain is marshy and cannot support the weight of the drilling rigs but access is being formed using floating timber mats on the very soft areas.

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