Metal rod body of equal-strength threaded steel resin anchor

 

Product introduction and main parameters

      The main material of the metal rod body of the equal-strength threaded steel type resin anchor is preferably the rebar with a yield strength greater than 335 MPa. The torque nut is used to integrate the stirring resin anchor and the installation anchor, which is beneficial to increase the installation speed and increase the bolt preload. force. The specifications and models can be designed and selected according to different uses, geological conditions and strength requirements.

The main technical parameters
1. Overall dimensions and allowable deviation (單位:mm)

specification

Rod inner diameter(d)

Rod outer diameter

Cross rib height

Cross rib spacing

 
 

Nominal size

Allow

deviation

Nominal size

Allow

deviation

Nominal size

Allow

deviation

Nominal size

Allow

deviation

Φ20

18.2

±0.4

22

+0.4

-0.3

1.6

+0.4

-0.3

12

-0.4

Φ22

20

±0.4

24

+0.4

-0.3

1.6

+0.4

-0.3

12

-0.4

                   

2. Mechanical properties

Brand

Yield Strength(MPa)

Tensile strength(MPa)

Elongation(%)

MG335

≥335

≥490

≥15

 

Scope of application

          MSGLD series and other strong threaded steel resin bolt metal rod body products are widely used in underground rock roadway, semi-coal rock roadway and coal roadway bolt support, especially suitable for underground roadway and tunnel support under complex conditions. This product is used in conjunction with resin anchoring agent. Its characteristics are: 1. Reasonable structure, full strength of the full length of the anchor bolt, which solves the shortcomings of the strength loss of the screw thread segment in the previous processing; 2. The strength has been greatly improved and installed Not only can it bear the load in time, but also increase the anchoring force; 3. Expand the scope of use of the anchor rod, which can achieve end anchors, extended anchors and full anchors; 4. Easy installation and operation, low labor intensity of workers, high support rate; 5 The cost of supporting coal per ton is greatly reduced.

 

User's manual

        The metal rod body of the equal-strength threaded steel resin anchor rod is composed of rod bodies of different strength materials and their accessories together with supporting resin anchoring agents. According to the design anchorage length, the rod body is inserted into the hole where the anchoring agent is placed. After stirring, the anchoring agent produces a chemical reaction. Within a certain time, the rod body and coal rock are bonded together and fixed in the rock wall, and the threaded end is installed. After the protective net and the load-bearing tray are tightened with nuts to achieve the supporting effect, the effective formation of high-strength prestressed support can control the stability of the roof, adapt to the movement of the surrounding rocks, and can effectively reduce or even eliminate the separation layer, and solve the collapse of the roof. A variety of supporting forms and structures constitute a prestressed supporting system, which realizes mechanical installation and greatly improves the safety and reliability of the supporting.

       (1) Select metal rod and anchoring agent according to design.

       (2) Drill holes on the calibrated anchoring base, the diameter and depth of the drill holes are matched with the specifications of the anchor rod.

       (3) After drilling, remove the floating dust in the hole with compressed air or water and install anchoring agent.

       (4) Use the stirring equipment to drive the metal rod body and advance to the bottom of the hole while stirring. The stirring time should be less than the gel time of the anchoring agent.

        (5) Do not move the rod during the waiting time.

        (6) After the specified waiting time, the tray can be screwed on the nut. After the load time is reached, the tensile strength can be tested.



















 

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