Underground mines specify MineCribTM concrete cribbing block, manufactured at Rock Springs Block Co., for a number of reasons:
* Concrete MinecribTM block provides immediate support of the
mine roof and does not shrink like wood timber.
* Wood timer deteriorates in the damp, underground mine
environment, but concrete MinecribTM block actually gain strength
as they continue to cure!
* MineCribTM cribbing block can support more than 900 tons and
will not yield. Plywood compression panels on the bottom of each
not yield crib enable supervisors to monitor total roof loading,
* MineCribTM blocks are handled and set in place with a forklift,
reducing labor costs and installation time for roof supports.