Rock Bolt

Short Description:

Rock bolt, in tunneling and underground mining, steel rod inserted in a hole drilled into the roof or walls of a rock formation to provide support to the roof or sides of the cavity. Rock bolt reinforcement can be used in any excavation geometry, is simple and quick to apply, and is relatively inexpensive. The installation can be fully mechanized. The length of the bolts and their spacing can be varied, depending on the reinforcement requirements. There are three major ways of anchoring the r...


  • High Srength Rock Bolt/ Anchor Bolt: is an advanced rock bolt which can Ensure anchoring effect for complex ground conditions ranging from sand and gravel to inconsistent fill, boulders, rubble and weather rock.
  • Application: tunneling, mining, slope stabilization and foundation support
  • Standard: MT 145.2; YB/T 4363; GB/T 20065; Or as clients' request
  • Product Detail

    Product Tags

    Rock bolt, in tunneling and underground mining, steel rod inserted in a hole drilled into the roof or walls of a rock formation to provide support to the roof or sides of the cavity. Rock bolt reinforcement can be used in any excavation geometry, is simple and quick to apply, and is relatively inexpensive. The installation can be fully mechanized. The length of the bolts and their spacing can be varied, depending on the reinforcement requirements.

    There are three major ways of anchoring the rock bolts: mechanical, grouted, and friction. The most common grout-anchored rock bolt is the fully grouted rebar, a threaded bar made of steel. Cement or resin is used as the grouting agent. A cable bolt is a reinforcing element made of steel wires in the form of a strand or rope; it is installed in the borehole with cement grout.

    微信图片_20180511084212

    Super high duty, ultra high strength heat treatment rock bolt/ anchor bolt/ roof support system is an advanced steel products with prime quality and high performance, which can ensure the anchoring effect for complex ground conditions, such as sand and gravel to inconsistent fill, boulders, rubble and weathered rock. Raw materials are hot rolled steel rebars or deformed bars, using inductive heat treating technology (our patent). This product is widely used in tunneling, mining, slope stabilization and foundation support.

    Our high duty high strength rock anchor bolt product have higher strength grade than normal hot-rolled rebars( for example, grade MG500,600,700,785,830 Mpa). This advantage of our product can decrease deformation of rocks, control or limit the breakage area in surrounding rock. It’s good anti-impact property can resist sudden impact pressure, which can ensure the security of mining operation.

     

    MECHENICAL PROPERTIES                                                                                                                                                 

      Steel Grade Yield Strength Tensile Strength Elongation After Fracture Elongation under Max Force Impact Absorb Energy
    Rel/MPa Rm/MPa A/% Agt/% kv2/J
    NOT LESS THAN
    Industrial Standard MG335/MG400 335 500 15   40
    MG500 500 700 22   100
    Our company Standard 600 600 750 19 9 90
    700 700 850 17 7.5 80
    785 785 930 16 5.5 60
    830 830 1030 15 4.5 50

     

    GENERAL DIMENSION                                                                                                                                                          

     

    Suface Type Nominal DiameterDn/mm Nominal Cross SectionSn/m㎡ Weight per meterg/m Top strength levelMPa
    Levorotation,
    no longitudinal rib
    16 201.06 1578 800
    Levorotation,
    no longitudinal rib
    18 254.47 1998 800/1080
    Levorotation,
    no longitudinal rib
    20 314.16 2466 800
    Levorotation,
    no longitudinal rib
    22 380.13 2984 800
    Levorotation,
    no longitudinal rib
    25 490.88 3853 800/1080
    Levorotation,
    no longitudinal rib
    28 615.75 4834 800
    Levorotation,
    no longitudinal rib
    32 804.25 6313 800/1080

     

    PRODUCTION PROCESS                                                                                                                                                        

     1. 600MPa ~ 700MPa

    Raw material — Heat Treatment — Mechanical Property Test — Sawing/Cutting — Reduce diameter — Screw thread — Test — Packaging — Stock in

    2. 335MPa ~ 500MPa

    Raw Material — Reduce diameter — Screw thread — Test — Packaging — Stock in

     

    APPLICATION                                                                                                                                                                             

    • Coal mining
    • Hard rock mining
    • Civil construction
    • General construction
    • Geotechnical and Shoreline
    • Bridges
    • Dams
    • Infrastructure
    • Tunnels

    Application

     

     

     

    SAFETY CERTIFICATE OF APPROVAL FOR MINING PRODUCTS                                                                       

     safety certificate of approval for mining products  MSGLW-700 safety certificate of approval for mining products  MSGLW-600 safety certificate of approval for mining products  MSGLW-500 safety certificate of approval for mining products  MSGLW-400 safety certificate of approval for mining products  MSGLW-335

     

    MODEL/TYPE : MSGLW-335/16,18,20,22,25

                                   MSGLW-400/16,18,20,22,25

                                   MSGLW-500/16,18,20,22,25

                                   MSGLW-600/16,18,20,22,25

                                   MSGLW-700/16,18,20,22,25

    More information for our certificates, please refer to the ABOUT US page. Thank you!

     

     

     


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