A mine roof support crib. The crib includes a plurality of chocks that are connected together through notches in the chocks to form at least three planes and able to support at least five tons of load. Each notch has at least one edge. A method of forming a mine roof support crib. A method of forming a chock for a mine roof crib to support a mine roof.
申请公布号
WO03031773(A2)
申请公布日期
2003.04.17
申请号
WO2002US31725
申请日期
2002.10.04
申请人
STRATA PRODUCTS (USA), INC.;PATON-ASH, GREGORY, ROY;REINMANN, JOHN, JOSEPH, JR.
发明人
PATON-ASH, GREGORY, ROY;REINMANN, JOHN, JOSEPH, JR.
