Mine roof support crib having only two or three planes, and method

Abstract

A mine roof support crib. The crib includes a plurality of chocks that are connected together through notches in the chocks to form only three planes with at least two of the planes in perpendicular relation with each other and able to support at least five tons of load. Alternatively, the plurality of chocks that are connected together through notches in the chocks form only two planes which are in perpendicular relation with each other and are able to support at least five tons of load. A mine roof support crib. The crib includes a plurality of chocks that are connected together through notches in the chocks to be able to support at least five tons of load. The plurality of chocks comprises a first type of chock having only one notch on a first side and a second type of chock having at least one notch on a second side. The plurality of chocks is connected together. A method of forming a mine roof support crib.

Dependencies are inferred from the claim text.