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 timber 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
non-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.