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US 2018/0291737 A1Published application
Grout delivery system
AssigneeNcm Innovations (Pty) Ltd.
InventorsPaolo Ettore PASTORINO, Adrian BERGHORST
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AssigneeNcm Innovations (Pty) Ltd.
InventorsPaolo Ettore PASTORINO, Adrian BERGHORST
Estimating the term…
A rock bolt assembly includes a rock bolt with an elongate body between distal and proximal ends, a tubular sleeve with first and second ends, proximal and distal ends of the bolt projecting from first and second ends of the sleeve, a load bearing barrel centrally bored to engage the rock bolt between the sleeve's first end and the bolt's proximal end, which barrel is adapted at a forward end to engage with the sleeve's second end in sealing contact, and which barrel has at least one grout conduit between the barrel's exterior surface and the bore, which at least one conduit defines a part of a grout passage which communicates the exterior surface of the barrel with an interior of the sleeve, when the barrel is engaged with the sleeve, and a seal which seals the grout passage to grout outflow but accommodates inflow of grout from a source.
A rock bolt assembly which includes a rock bolt with an elongate body which extends between a distal end and a proximal end, a tubular sleeve longitudinally extending between a first end and a second end, on the rock bolt such that proximal and distal ends of the bolt project from the first and second ends respectively of the sleeve, a load bearing barrel which is centrally bored to engage the rock bolt between the first end of the sleeve and the proximal end of the bolt, which barrel is adapted at a forward end to engage with the first end of the sleeve in sealing contact, and which barrel has at least one grout conduit between an exterior surface of the barrel and the bore, which at least one conduit defines a part of a grout passage which communicates the exterior surface of the barrel with an interior of the sleeve when the barrel is engaged with the sleeve, and a seal which seals the grout passage to grout outflow but accommodates inflow of grout from a source.
A grouting kit for grouting a rock bolt in a rock hole which includes a load bearing barrel which is centrally bored to engage with the rock bolt, and which has at least one grout conduit between an exterior surface of the barrel and the bore and a seal which seals the grout conduit, and a grout delivery coupling member which includes a body with a first end and a second end and a passage between the ends, a circular distributing channel in a wall of the cylindrical passage and a grout inlet port in a side of the member which communicates an exterior of the member with the channel, wherein the passage is adapted to receive the barrel from the first end and to engage with the barrel in a position in which the at least one grout conduit sealingly docks with the channel.
A method of anchoring a rock bolt within a rock hole, the rock bolt including an outer sleeve which extends between a first end and a second end opening into a funnel, an elongate bolt body which extends between a distal end and a proximal end, which locates within the sleeve and distal end section and a proximal end section extending beyond the first end and the second end of the sleeve as a distal end section and proximal end respectively, the distal end section of the bolt body partly carrying a mechanical anchor which is at least partially held within the sleeve in a closed position and the proximal end section of the bolt body being, at least partly, threaded, a faceplate located over the sleeve, a barrel on the threads of the proximal end section and a nut on the threads between the barrel and the proximal end, the method including the steps of pre-spacing the barrel from the funnel or the nut from the barrel, inserting the rock bolt into a predrilled rock hole, distal end leading, until the faceplate is sandwiched between a rock wall and an outer surface of the funnel and pushing the bolt body further into the rock hole to close the pre-spacing allowing the rock bolt to move relatively to the sleeve to drive the mechanical anchor from the first end of the sleeve and into an radially expansive open position in which the mechanical anchor resistively engages the walls of the rock hole.
Dependencies are inferred from the claim text.