Mine roof plate beam for a roof truss assembly

Details Mine roof plate beam for a roof truss assembly Mine roof plate beam for a roof truss assembly

E - Fixed Constructions

21

D

61/66

E21D 11/36 (2006.01) E21D 11/00 (2006.01) E21D 17/01 (2006.01) E21D 17/03 (2006.01) E21D 17/10 (2006.01)

Patent

CA 1168459

TITLE MINE ROOF PLATE BEAM FOR A ROOF TRUSS ASSEMBLY ABSTRACT OF THE DISCLOSURE An elongated plate beam has a plurality of long- itudinally extending downwardly directed ribs. The ribs are positioned in parallel spaced relation to form a pair of lateral ribs and a center reinforcing rib. The plate beam has a preselected length adapted to span the width of a mine passage and includes a top surface arranged to abut a mine roof and a bottom surface. A plurality of openings are spaced the length of the plate beam and extend through the center reinforcing rib. A roof plate is positioned in abutting relation with the plate beam bottom surface in overlying relation with each opening. Roof bolts extend through the roof plates and openings into engagement with the walls of bore holes drilled in the mine roof. An enlarged end of each roof bolt bears against the respective roof plate to apply an upward force upon the plate beam to position the plate beam in roof supporting relation with the mine roof the entire width of the mine passage spanned by the plate beam. In one embodiment the roof plates each include a center rib positioned in complemen- tary interengagement with the plate beam center reinforcing rib to increase the surface to surface contact of the roof plates with the plate beam to increase the bearing force applied by the plate beam to the mine roof. - 2 -

375647

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