Mine support assemblies

Patent

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Details

E21D 1544

Patent

active

039712257

ABSTRACT:
A shield support assembly for underground mining operations having a caving shield supported from a ground-engaging structure by a support beam pivotally attached at opposite ends to the shield and the ground-engaging structure, the shield being also pivotally attached to such ground-engaging structure by a pivot which is displaceable longitudinally of such structure by pressure-fluid-operated ram means arranged to act between such structure and the shield, the pivot or an extension of the shield beyond the pivot.

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