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公开(公告)号：US20200340359A1
公开(公告)日：2020-10-29
申请号：US16857737
申请日：2020-04-24
IPC分类号： E21D21/00
摘要： A cable bolt assembly is disclosed comprising a cable bolt having a shaft, an end fitting disposed on the shaft and including an end fitting body. Mechanical interlocking is provided between the body and the shaft to form a connection therebetween. The mechanical interlocking may be formed directly between the body and the shaft and/or by engagement formations disposed intermediate the body and shaft. The body further including an exterior profiling arranged to engage a further component of the end fitting to install and/or tension the cable bolt assembly in use. A method of forming the cable bolt assembly is also disclosed.
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公开(公告)号：US10815780B2
公开(公告)日：2020-10-27
申请号：US16616829
申请日：2018-06-07
摘要： Disclosed is a resin bolt which includes an elongate shaft which extends between a leading end and a trailing end and a positioning head which is integral to the shaft at the leading end and which extends in the elongate axis of the shaft from a perimeter rim to a crown, with the head formed with a plurality of projections, with each projection extending laterally, beyond the radial dimension of the shaft and each projection having a leading surface which slopes, at least partially, from the crown to the perimeter rim, and a trailing surface from the perimeter rim to the shaft.
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公开(公告)号：US10768062B2
公开(公告)日：2020-09-08
申请号：US15967932
申请日：2018-05-01
申请人： REI, Inc.
发明人： Alex Schumacher , Daniel J. Brunner , Jeffrey J. Schwoebel , Randy Richardson , Robert Koontz , Randall Johnson
IPC分类号： G01L5/00 , B65G11/20 , G01L5/24 , F16B31/02 , E21D21/02 , B02C17/22 , E21D21/00 , B65G39/02 , B02C17/18
摘要： A monitoring system includes a fastener. A sensor is coupled to the fastener. A circuit board is electrically coupled to the sensor. An antenna electrically coupled to the circuit board.
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公开(公告)号：US20200217201A1
公开(公告)日：2020-07-09
申请号：US15751808
申请日：2017-06-07
发明人： Nong ZHANG , Peng MA , Changliang HAN , Zhengzheng XIE
摘要： Provided is a mounting method for an extensible reaming self-anchoring anchor rod, which is especially applicable to roadway construction in coal mines. A big helical structure is arranged on two rod sections of a sectional type anchor rod, a simple drill bit drills and reams a bore and cuts the coal mass in one operation, the outer diameter of the simple drill bit is smaller than the outer diameter of the big helical rod body, and the big helical structure accomplishes secondary reaming, self-drilling and self-anchoring in the drilling process; the big helical structure inhibits propagation and development of sheet cracks of the coal wall in the radial direction, and is embedded in the coal mass through a self-stabilization process of the rock mass.
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公开(公告)号：US10704389B2
公开(公告)日：2020-07-07
申请号：US16351626
申请日：2019-03-13
摘要： A system for re-tensioning mine roof channels includes a roof plate having a first side, a second side positioned opposite the first side, and a sidewall extending therebetween, where the first side is configured to engage a surface of a mine roof, and where the sidewall defines a radially extending slot configured to receive a mine roof bolt. The system also includes a spacer having a first side, a second side positioned opposite the first side, and a sidewall extending therebetween, with the first side of the spacer configured to engage with the second side of the roof plate, and the sidewall defining a slot configured to receive a mine roof bolt, and a nut having a first side, a second side positioned opposite the first side, a sidewall therebetween, and a threaded opening, with the sidewall defining a radially extending slot configured to receive a mine roof bolt.
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公开(公告)号：US10677055B2
公开(公告)日：2020-06-09
申请号：US15739173
申请日：2016-06-24
申请人： Manchao He
发明人： Manchao He , Zhibiao Guo
摘要： A fractured roof 110 mining method entry-side anti-collapsed structure, one working face of the 110 mining method corresponds to one roadway but without retaining any coal pillar, the roadway retains an entry after the previous working face implements mining top-cutting pressure release, and a roof of the roadway is arch-shape, directional cutting is conducted on one side of the roadway, and the cutting angle is between 15-20 degrees. One working face corresponds to one roadway but without retaining any coal pillar when underground mining is conducted, which can save resources and improve recovery rate of mining. And, the roof of the roadway of the retained entry is arch-shaped, which can improve safety and ensure safety of the coal mining working face. In addition, a cutting angle is 15-20 degrees, which can effectively determine a roof caving direction after top-cutting and reduce affect to the retained entry.
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公开(公告)号：US20200173281A1
公开(公告)日：2020-06-04
申请号：US16615176
申请日：2018-05-30
摘要： A bung has a body which extends between a leading end and a trailing end and which includes an inner part of a rigid material which has a cylindrical aperture for receiving a rock bolt and an outer sealing part of a resiliently deformable material circumscribing the inner part. The inner part and the outer part engage at an interface which has a co-efficient of friction which allows the outer part to disengage from the inner part at the interface when a shear force above a predetermined level is applied to the outer part or the inner part.
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公开(公告)号：US20200157939A1
公开(公告)日：2020-05-21
申请号：US16634238
申请日：2017-09-14
发明人： Brendan Robert CROMPTON , Cornelius Adriaan NIEUWENHUIS , James William SHEPPARD , Henri VISSER
IPC分类号： E21D21/00
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.
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公开(公告)号：US20200063558A1
公开(公告)日：2020-02-27
申请号：US16611761
申请日：2018-05-09
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.
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公开(公告)号：US10294788B2
公开(公告)日：2019-05-21
申请号：US15657676
申请日：2017-07-24
发明人： John C. Stankus , Dakota Faulkner , David Rager
摘要： A mine bolt includes an elongated body having a first end and a second end positioned opposite the first end, and an anchor comprising a tube defining a central opening and a slot extending at least a portion of the length of the tube. The anchor is secured to the elongated body. The anchor is configured to compress upon installation of the mine bolt to anchor the elongated body within a bore hole.
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