公开(公告)号：US11220906B2

公开(公告)日：2022-01-11

申请号：US16765471

申请日：2018-11-13

申请人： Peter Bryce Catoi

发明人： Peter Bryce Catoi

IPC分类号： E21D21/00

摘要： A rock bolt (10) to be received in a drilled hole comprising a threaded shaft (12) and a sleeve (14) into which the shaft (12) is received. A plurality of openings (38) are provided along the length of the sleeve (14) and clamping assemblies (16) each having clamp members (36) are provided adjacent each opening (38). Wedge members (26) are located adjacent each of the clamp members (36) and the wedge members (26) each include a threaded bore for receiving the shaft (12) such that rotation of the shaft (12) moves the wedge members (26) into engagement with the clamp members (36) to move the clamp members (36) outwardly through the openings (38) to engage with an inner surface of the hole.

公开(公告)号：US20210324739A1

公开(公告)日：2021-10-21

申请号：US17362958

申请日：2021-06-29

申请人： JUSAND NOMINEES PTY LTD

发明人： Sam Thomas ,  Gerry Noonan

IPC分类号： E21D21/00 ,  E21D20/00

摘要： The present invention provides a retainer device 1 for retaining or holding an anchor rod 11 of a rock anchor, especially a self-drilling anchor, in a hole H drilled above horizontal. The retainer device 1 comprises: a body portion 2 configured to be mounted on the anchor rod 11, e.g., on an outer or external periphery of the anchor rod, and at least one locking arm or tab 6, 7 that projects from the body portion 2 in a direction transverse to a longitudinal extent of the anchor rod 11. The body portion 2 is configured to engage an abutment or shoulder on the outer or external periphery of the anchor rod to prevent its movement relative to the anchor rod 11 in use, and the at least one arm or tab 6, 7 is configured to deform so as to engage and bear against an inner wall W of the hole H when the retainer device 1 mounted on the anchor rod 11 is driven into the hole H. The invention also relates to a rock anchor system 10, comprising: at least one elongate anchor rod 11; a drill bit 12 configured for attachment to one end region 13 of the elongate anchor rod 11 for drilling the anchor rod 11 into rock strata R; and at least one retainer device 1 according to the invention described above for retaining or holding the anchor rod 11 in a hole H drilled in the rock strata R above horizontal. The invention also provides a method for installing a rock anchor.

公开(公告)号：US11131190B2

公开(公告)日：2021-09-28

申请号：US16611761

申请日：2018-05-09

申请人： SANDVIK INTELLECTUAL PROPERTY AB

发明人： Bradley Darlington ,  Peter Young ,  Mietek Rataj

IPC分类号： E21D21/00

摘要： A friction rock bolt assembly is arranged to frictionally engage an internal surface of the bore formed in rock strata. The rock bolt includes a loading mechanism provided at a rearward end of the rock bolt having a load absorber to absorb an initial predetermined loading force followed by transfer of the force to a main load element.

公开(公告)号：US11105199B2

公开(公告)日：2021-08-31

申请号：US17016445

申请日：2020-09-10

申请人： Square Cut Systems, LLC

发明人： Frank M. Locotos ,  David J. Nardo

IPC分类号： E21D21/00

摘要： A cuttable, sinkable mining bolt system for use in supporting the sidewall or rib in a coal mine. A bearing plate has a plurality of hollow cores defined transaxially therein and a central hole defined axially therethrough, the bearing plate made of modified recycled, rigid PVC compound. A fiberglass bolt is adapted to be inserted through the central hole of bearing plate. Bolt is one-piece consisting of glass fiber reinforced plastic. Head component includes a square head and integral, beveled washer for self-centering in the bearing plate as rod component is driven into rib. Bearing plates are adapted to sink into a refuse stream. Hollow cores of bearing plate reduce the material and thus the weight and expense of the bearing plate while still allowing the bearing plates to sink. Optionally, rod components can be inserted transaxially through the hollow cores to increase the strength and coverage of the system.

公开(公告)号：US20210087932A1

公开(公告)日：2021-03-25

申请号：US16955322

申请日：2019-05-17

申请人： Robert Cousineau

发明人： Robert Cousineau

IPC分类号： E21D21/00 ,  F16B13/00 ,  F16B13/06

摘要： The present disclosure provides a system to optimally set an anchor and a bullet within a bore hole. The anchor is comprised of at least two cutters connected to and positioned below spreading lamellae of the anchor. The cutters are comprised of a wide edge and a narrow edge, the wide edge having a width that is wider than the circumference of the spreading lamellae to facilitate the setting of the anchor. A space is also initially provided between each of the cutters and the bullet to reduce friction of anchor on the bullet during expansion. During setting, the spreading lamellae of the anchor spread radially over the bullet to set the undercut anchor within the pre-drilled bore hole. In another embodiment, the anchor is comprised of at least two angular cutters having a taper of several degrees to facilitate cutting through the cementitious material of the bore hole.

公开(公告)号：US10941657B2

公开(公告)日：2021-03-09

申请号：US15645312

申请日：2017-07-10

申请人： FCI Holdings Delaware, Inc.

发明人： Lumin Ma ,  Dakota Faulkner ,  John C. Stankus

IPC分类号： E21D21/00 ,  E21D20/02 ,  E21D20/00 ,  C21D1/26 ,  C21D9/00

摘要： A mine bolt includes an elongated body having a first end and a second end positioned opposite the first end, with the elongated body having a first threaded section, a second threaded section, and a non-threaded section positioned between the first threaded section and the second threaded section. The non-threaded section is configured to yield under loading when the mine bolt is installed with grout in a bore hole.

公开(公告)号：US10907474B2

公开(公告)日：2021-02-02

申请号：US15768219

申请日：2017-06-07

申请人： China University of Mining and Technology

发明人： Nong Zhang ,  Zhengzheng Xie ,  Changliang Han

IPC分类号： E21D20/00 ,  E21D21/00 ,  E21F17/18 ,  E21D20/02 ,  E21F17/00 ,  E21F17/02 ,  G01B11/30

摘要： A reaming and self-rotating anchor rod includes a rod body, a drill bit, a connecting member, a tray, and a nut. One end the connecting member is snap-fixed to the tail part of the rod body, the other end of the connecting member is connected to an anchor rod bolter. The rod body has an annular protrusion at its middle part to block powder so that the powder fills up the clearance between the rod body and the coal mass. The drill bit has female threads and can be screwed into the front part of the rod body, and the drill bit has baffle pawls and spiral grooves on its side surface.

公开(公告)号：US20210018315A1

公开(公告)日：2021-01-21

申请号：US17043778

申请日：2019-05-14

申请人： SHANDONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

发明人： Yunliang TAN ,  Kai ZHOU ,  Fenghai YU ,  Tongbin ZHAO

IPC分类号： G01B21/02 ,  E21D21/00 ,  E21F17/00

摘要： An anchor bolt length determination method based on monitoring of a roof rock stratum horizontal extrusion force includes drilling a borehole in the middle of a roadway roof to determine a surrounding rock fracturing scope by a borehole television. The method includes selecting the number and locations of horizontal extrusion force measuring points according to the surrounding rock fracturing scope. The method includes monitoring and recording a change of the horizontal extrusion force over time in the borehole by a device for monitoring a roof rock stratum horizontal extrusion force. The method includes selecting a location with the largest horizontal extrusion force as a center of a anchoring segment of an anchor bolt to determine a distance between the anchoring center and the roof. The method includes calculating a total length of the anchor bolt.

公开(公告)号：US10858937B2

公开(公告)日：2020-12-08

申请号：US16634238

申请日：2017-09-14

申请人： EPIROC DRILLING TOOLS AB

发明人： Brendan Robert Crompton ,  Cornelius Adriaan Nieuwenhuis ,  James William Sheppard ,  Henri Visser

IPC分类号： E21D21/00 ,  E21D20/02

摘要： Disclosed is a grout anchored rock bolt which includes an elongate cylindrical body of a suitable material which has at least one integral anchor portion which includes of a plurality projection, each of which extends laterally from the body in at least one radial direction, wherein the projections are consecutively serially arranged along the length of the anchor portion and wherein each projection is radially offset relatively to the preceding formation at an angle that is not orthogonal.

公开(公告)号：US20200377424A1

公开(公告)日：2020-12-03

申请号：US16498231

申请日：2018-03-29

申请人： Hilti Aktiengesellschaft

发明人： Anna Sharmak ,  Armin Pfeil ,  Friedlinde Götz-Neunhöffer ,  Daniel Jansen

IPC分类号： C04B40/06 ,  C04B28/06 ,  C04B22/10 ,  E21D20/02 ,  E21D21/00

摘要： Amorphous calcium carbonate is included in a fire-resistant inorganic mortar system for a fire-resistant chemical fastening of anchors and post-installed reinforcing bars in mineral substrates. The system includes a curable aluminous cement component A and an initiator component B for initiating the curing process. The component A includes at least one blocking agent selected from the group of phosphoric acid, metaphosphoric acid, phosphorous acid and phosphoric acids, at least one plasticizer and water. The component B includes an initiator, at least one retarder, at least one mineral filler and water. Moreover, amorphous calcium carbonate in a fire-resistant inorganic mortar increases load values. Also, a method is used for a fire-resistant chemical fastening of anchors and post-installed reinforcing bars in mineral substrates, such as structures made of brickwork, concrete, pervious concrete or natural stone.