Metal rod body without longitudinal rib threaded steel resin anchor rod


Product introduction and main parameters

         The main material of MSGLW series non-longitudinal threaded steel resin anchor metal rod body is preferred to use rebar with yield strength greater than 335MPa, 400MPa, 500MPa, 600MPa, and the use of torque nuts to integrate the mixing resin anchor agent and the installation anchor rod is beneficial to improve Install speed and increase anchor pretension. 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 ( mm)

Specification

Rod inner diameter

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

Φ18

18

+0.5

+0.1

21

+1.3

-0.7

1.5

±0.4

13.3

±0.5

Φ20

20

+0.5

+0.1

23

+1.3

-0.7

1.5

±0.4

13.3

±0.5

Φ22

22

+0.3

-0.2

23.6

+0.9

-0.6

0.8

+0.3

-0.2

12

 ±0.8

2. Mechanical properties

Brand

Yield Strength(MPa)

tensile strength(MPa)

Elongation(%)

MG335

≥335

≥490

≥15

MG400

≥400

≥570

MG500

≥500

≥660

MG600

≥600

≥800

 

Scope of application

        MSGLW series non-longitudinal rib threaded steel resin bolt metal rod body products are widely used in underground rock tunnel, semi-coal rock tunnel and coal tunnel bolt support, especially suitable for underground tunnel and tunnel support under complex conditions. This product is used in conjunction with resin anchoring agent. Its characteristics are as follows: 1. The strength grows fast and the strength is high. After installation, it can not only bear the load in time, but also has a large anchoring force. 2. Easy installation and operation, low labor intensity and high support efficiency. 3. The cost of supporting coal per ton is greatly reduced.

 

User's manual

        The metal rod body of the longitudinal ribless 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 machine to drive the metal rod body and push it 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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