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When using 2 bolt connectors from this range, each bolt must be tightened a 1/4 to 1/2 turn alternately, until the shear head operates. For tightening the shear head bolts, use only a 13mm AF, six sided hexagon socket (17mm AF for models TTD431XFA, TTD451XFA & TTD551FJA models). For double insulated cables, the outer sheath Cable Bolts 17.8mm - DSI Underground Australia1.50kg. Nominal Strand Diameter. 17.8mm. Key Features. Manufactured from stress relieved, low relaxation, high strength 17.8mm diameter 7 wire steel strand the cable bolt is formed by bulbing the strand into small cages, typically 29 31 mm diameter, and at 1 bulb per metre.

Cable insertion tool - GILLESPIE; HARVEY D.

An insertion tool for inserting a multi-strand twisted cable into a blind mine tunnel roof bore hole includes a drive mechanism on one end thereof for fitting into a conventional bolting machine, and a socket on the opposite end thereof for receiving therein the bare end of a multi-strand twisted cable. China Post Tension Anchorage, Post Tension Anchorage China Post Tension Anchorage manufacturers - Select 2021 high quality Post Tension Anchorage products in best price from certified Chinese Anchor Plate, Prestressed Concrete suppliers, wholesalers and factory on Made-in-China Ground support - QueensMineDesignWikiThe bolts can be used as pre or post reinforcement with pre or post tensioning. Cablebolts are manufactured as 7-wire cables with various strand diameters:0.5", 0.6", 0.7" and, as they are purchased in rolls, can be cut to any specified lengths, typically 5' (1.52m) - 50' (15.2m). The wires are layed using one of the defined types:plain

Mining Equipment, Breaking, Drilling & Crushing Products

The Sandvik range of rock support drill rigs is designed for a wide array of hard-rock mining operations, tunneling and civil engineering applications. Thanks to on-board cement mixers, cement bag platforms, and optional cement silos and steel strand reels, the rigs Patents Assigned to Jennmar Corporation - Justia Patents Jan 11, 1996 · After an upper portion of the cable mine roof bolt is secured, the shearable stop mechanism is subsequently sheared by the rod member to allow for tensioning of the cable mine roof bolt. A flexible multi-strand cable is coupled to the coupling device and forms the attachment point for the cable mine roof bolt. Principles of rockbolting design - ScienceDirectJun 01, 2017 · Layer 3 Cable bolting:Single- or multi-strand cables are installed into the competent rock behind the failure zone. (4) Layer 4 External support:Structure elements, including steel sets, concrete arches, invert, cast concrete lining and thick shotcrete liners, are set up in tunnels.

Products Instrumentation Mine Design Technologies

Lightweight and flexible, our SMART MPBX (Multi-Point Borehole eXtensometer) has six anchor points and an integrated electronic readout head. SMART Cable Bolt By combining the support capabilities of a standard 7-strand cable bolt with a miniature 6-wire extensometer, the SMART (Stretch Measurement to Assess Reinforcement Tension) Cable was born. Results of pull tests of rock bolts and cable bolts in Apr 01, 2018 · The tested bolts include:end-anchored corrosion-protected steel bolts, resin-grouted fibre reinforced plastic bolts, cement-grouted multi-strand cable bolts and friction bolts. Recorded and corrected bolt stiffness characteristics are presented by bolt type, grouting agent, lithology, bolt bar material and borehole diameter. Tensionable cable bolt - Jennmar CorporationFeb 06, 1998 · an elongated member having an upper portion adapted to be resin grouted within a bore hole in rock and an intermediate portion having a mechanical anchor for engaging with the rock surrounding the bore hole, and an end portion having a bolt head drivable by mine roof bolt installation equipment, said upper portion comprising a length of multi-strand cable, whereby when said bolt is

Thorne & Derrick - Power and Cables

Thorne & Derrick LV MV HV Joints Gland Cleats Terminations 11kV 33kV. 0191 410 4292. +44 (0) 117 935 9421. Newsletter Signup. US7625155B1 - Mine roof cable bolt assembly - Google Cable bolt assemblies including tension cylinders and tension nuts, alone or in combination with cables and roof bearing plates, for use in underground mines to support mine roofs, are disclosed herein, as well as methods of securing roof cables to and within a mine roof for superior and immediate support. The cables have a first end securable within a borehole in a roof, a second end for US8277148B2 - Re-tensionable cable bolt apparatus and A re-tensionable cable bolt and related methods are provided. In one aspect of the invention, the bolt includes a sleeve for connecting or securing to a cable. The sleeve includes a lower end having a bore adapted for receiving a threaded shank for associating with a tension nut. A plurality of facets along a peripheral portion of the sleeve create corners that prevent the cable from rotating

Cable bolt head - Jenmar Corporation

A plurality of designs for mine roof bolts is disclosed. Each mine roof bolt includes a flexible multi-strand cable having a first and second end with a drivehead formed on the first end, the drivehead having a plurality of driving faces on an exterior surface thereof. The drivehead is a separate member.