Abstract: An apparatus adapted for movement through a passage formed in the ground includes an elongate element and means for positioning a shroud around at least part of the elongate element for engagement against the periphery of the passage to provide a space through which the elongate element can move. The shroud is of flexible construction and is arranged to be progressively installed in position as the elongate element moves along the passage. The apparatus is adapted for introducing an inflation fluid into the region between the shroud and the elongate element in order to inflate the shroud and maintain it in engagement against the periphery of the passage.

Abstract: A screening device including a screen includes a first side for presentation to a body of material to be screened and a second side. A plurality of elongate screen openings are formed in the screen extending between the first and second sides thereof. A plurality of tines mounted on support means disposed on the second side of the screen. Each tine is movable along a cyclical path at least part of which includes one of the elongate screen openings whereby the tine is receivable in and movable along the elongate screen opening. The tine extends beyond the first side of the screen for at least part of the movement thereof along the screen opening. The screening device may be incorporated in various machines including a recovery head for an underground mining apparatus.

Abstract: Apparatus adapted for movement through a passage (16) formed in the ground, comprising an elongate element (13) and means for positioning a shroud (20) around at least part of the longitudinal periphery of the elongate element for engagement against the periphery of the passage (16) to provide a space through which the elongate element can move, the shroud (20) being of flexible construction and being arranged to be progressively installed in position as the elongate element (13) moves along the passage, and means for introducing an inflation fluid into the region (90) between the shroud (20) and the elongate element (13) for inflating the shroud (20) and maintaining it in engagement against the periphery of the passage (16).