Underground roadway or tunnel support

A method of supporting an underground roadway or tunnel comprising installing a series of spaced rigid support members along the roadway or tunnel, the rigid support member being erected in turn adjacent to newly exposed mine or rock surface as the roadway or tunnel is extended, locating deformable container means in at least portions of voids existing between the erected rigid support members and adjacent portions of the mine or rock surface, filling the deformable container means with flowable material such that the deformable container means is urged into contact with said adjacent portions of the mine or rock surface filling at least portions of the voids which previously existed between the rigid support members and the adjacent portions of the mine or rock surface and extending deformable limb means associated with the last installed deformable container means towards a newly erected rigid support member such that the limb means is inserted between the newly erected rigid support member and an adjacent portion of the mine or rock surface and is retained in the extended position when the next installed deformable container means associated with said newly erected rigid support member is filled with flowable material.