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公开(公告)号：EP4438852A1
公开(公告)日：2024-10-02
申请号：EP23164639.9
申请日：2023-03-28
发明人： WEAVER, Steven , RATAJ, Mietek
IPC分类号： E21D21/00
CPC分类号： E21D21/0033 , E21D21/008
摘要： A rock bolt 10 comprising: an elongate, generally circular tube 12, the tube 12 having a leading end 14 and a trailing end 16, an expander mechanism 18 disposed within the tube 12 in the region of the leading end 14, an elongate tendon 28 disposed longitudinally within the tube 12 and in connection at or towards a first end 26 of the tendon 28 with the expander mechanism 18 and in connection at or towards a second 38 and opposite end of the tendon 28 with an anchor arrangement 30 positioned at the trailing end 16 of the tube 12, the tendon 28 being actuatable to actuate the expander mechanism 18 and to remain connected between the expander mechanism 18 and the anchor arrangement 30 while the expander mechanism 18 is actuated, wherein the anchor arrangement 30 includes a couple 44, 54, 66 which, under tensile loading of the tendon 28, has a first mode of operation that allows movement of the anchor arrangement 30 axially away from the trailing end 16 of the tube 12 and enabling further expansion of the expander mechanism 18, and a second mode of operation that couples the anchor arrangement 30 to the tube 12 preventing further movement of the anchor arrangement 30 axially away from the trailing end 16 of the tube 12.
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公开(公告)号：EP4257795A1
公开(公告)日：2023-10-11
申请号：EP22167432.8
申请日：2022-04-08
发明人： WEAVER, Steven , RATAJ, Mietek
IPC分类号： E21D21/00
摘要： A rock bolt for use in rock strata, particularly strata that is weak or unstable. The rock bolt (10) comprises a tube (12) that has a leading end (14) and a trailing end (16) and an expander mechanism (18) disposed within the tube (12) in the region of the leading end (14). An elongate bar (24) is disposed within the tube (12) and is connected at or towards a first end of the bar with the expander mechanism and is connected at or towards a second and opposite end of the bar (28) with an anchor arrangement (26) positioned at the trailing end (16) of the tube (12). The elongate bar (24) can actuate the expander mechanism (18) and remains connected between the expander mechanism (18) and the anchor arrangement (26) while the expander mechanism (18) is actuated. The tube (12) has a displaceable wall section (42) in the region of the leading end (14) which has a hinge end (52) proximal the leading end (14) connecting the displaceable wall section (42) to the tube (12), and side walls (46) extending from the hinge end (52) to an anchor end (48) distal to the leading end (14). The expander mechanism (18) can be actuated to displace the displaceable wall section (42) to rotate about the hinge end (52) to shift the anchor end (48) outwardly from the tube (12).
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公开(公告)号：EP4174284A1
公开(公告)日：2023-05-03
申请号：EP21205283.1
申请日：2021-10-28
发明人： RATAJ, Mietek , DARLINGTON, Bradley
IPC分类号： E21D21/00
摘要： A rock bolt (1) comprising a central rod (2), a tubular outer body (5) provided around the central rod (2), and an expansion mechanism (8, 9) for radially expanding the leading portion (6) of the outer body (5), wherein the rock bolt (1) is designed such that the outer body (5) at installation is pulled into a bore of a formation from the leading portion (6) of the outer body (5) using driving force applied via the central rod (2).
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公开(公告)号：EP4438853A1
公开(公告)日：2024-10-02
申请号：EP23164641.5
申请日：2023-03-28
IPC分类号： E21D21/00
CPC分类号： E21D21/008 , E21D21/0033
摘要： A rock bolt 10 comprising: an elongate, generally circular tube 12, the tube 12 having a leading end 14 and a trailing end 16, an expander mechanism 17 disposed within the tube 12 in the region of the leading end 14, an elongate tendon 22 disposed longitudinally within the tube 12 and in connection at or towards a first end of the tendon 22 with the expander mechanism 17 and in connection at or towards a second and opposite end of the tendon 22 with an anchor arrangement 43 positioned at the trailing end 16 of the tube 12, the tendon 22 being actuatable to actuate the expander mechanism 17 and to remain connected between the expander mechanism 17 and the anchor arrangement 43 while the expander mechanism 17 is actuated, wherein the tube 12 has an opening 26 in the region of the leading end 14 and the expander mechanism 17 includes first and second cooperating expander elements 18, 20, in which the first expander element 18 is attached to an end of the tendon 22 for movement axially within the tube 12 towards the anchor arrangement 43 upon actuation of the expander mechanism 17 and the second expander element 20 is restrained relative to the tube opening 26, the second expander element 20 being shifted radially through the tube opening 26 as the first expander element 18 is shifted axially within the tube 12 towards the anchor arrangement 43.
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