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AssigneesHDRK Mining Research Limited, Wirth Maschinen-und Bohrgerate-Fabrik GmbH
InventorsWilfried Piefenbrink, Walter Weber, Hermann Hamburger
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To excavate drifts, tunnels, stopes, caverns or the like, tools operating in an undercutting manner are mounted on radially pivotable tool arms, which are located on a rotary working head. With at least one tool (54) on a tool arm (51), a central region (Z) of the rock face is cut radially from the outside inwards by pivoting of the tool arm (32), an outer region (A) surrounding the central region (Z) of the rock face is cut radially from the inside outwards by pivoting of the tool arm (32). Pivot drives (30) for at least some tool arms (31, 32, 33) can be controlled in such a manner that cross-sections with contours deviating from a full circular shape can be cut. Muck removing devices (27, 28) are used for collecting and transporting away the muck produced by the cutting operation.
Method for excavating drifts, tunnels, stopes, caverns or the like, with tools capable of operating in an undercutting manner on a rock face, mounted on tool arms, said tool arms being mounted on a head rotating about a reference axis, in the direction of excavation, so as to pivot radially relative to said reference axis, comprising cutting in an undercutting manner, with at least one tool on a tool arm, a central region of the rock face by pivoting said tool arm radially from the outside inwards, and cutting, also in an undercutting manner, with at least one other tool on another tool arm, an outer region surrounding the central region of the rock face by pivoting said other tool arm radially from the inside outwards.
Machine for excavating drifts, tunnels, stopes, caverns or the like having a head which is rotatable and movable in the direction of excavation, on which head tool arms are mounted which are radially pivotable by drives relative to a reference axis forming the axis of rotation of the head, the tool arms having tool supports for tools, operating in an undercutting manner, wherein for cutting an outer region of the rock face surrounding a central region, at least one tool arm is pivotable from a starting position in which the tool is located on an engagement point lying between the reference axis and the outer circumference of the rock face, outwards to a position in which its tool is located at the outer circumference of the rock face, characterised in that:
Dependencies are inferred from the claim text.