Self drilling rock bolt is a bolt that integrates the functions of drilling, grouting and anchoring, which can ensure the anchoring effect in complex strata (i.e. broken rock stratum, loose soil stratum and stratum requiring casing wall protection drilling). Self drilling rock bolt is reliable and efficient.

 

 

1, Drilling, grouting, anchoring integration, quick and easy installation.

2, There is no need to install bolt separately, and there is no need for casing wall protection.

3, The bottom regrouting structure, optimize the grouting effect, can improve the surrounding rock.

4, For all strata, the installation method is basically the same.

5, A variety of forms of drill suitable for different strata.

6, The central control rod body is used both for drilling and washing and for anchoring grouting.

7, Self drilling rock bolt body can be arbitrarily cut and connected.

8, Full-length waveform threaded rod body with plate nut, easy to apply prestress.

9, Self drilling rock bolt suitable for narrow work site.

 

1, The alloy drill bit is connected with one end of the anchor rod, and the other end of the anchor rod is connected with the drill sleeve and the drill tail, and then with the truck or handheld Rig hooked up. The Self drilling rock bolt should be drilled at the designed depth, and cooling water should be added when drilling. (If the bolt needs to be lengthened,Self drilling rock bolt can be connected by connecting sleeve and then drilled)

2. Remove the drill, insert the stop plug into the rod body, and insert it into the hole to prepare for grouting. In special cases, the grouting pressure is too large or the surrounding rock is too broken, the anchor agent can be used to seal the hole.

3. Connect the quick grouting joint with the end of the anchor rod, and connect the other end of the grouting joint with the grouting machine.

4. Start the grouting machine for grouting, shut down when the grouting is full and the pressure reaches the design value. Grouting pressure according to design parameters and grouting .

Machine performance is determined, The reference value of the ratio of ash to sand is 1:0 ~ 1:1, and the reference value of the ratio of water to cement is 0.45~ 0.5:1.

5. Install the pad and nut, and tighten the nut

• Outside diameter (mm) Ñ„25 Ñ„32 Ñ„38 Ñ„51


• Tensile strength (MPa) ≥650


• Tooth height (mm) 1.5±0.1


• Pitch (mm) 12.7±0.1


• Thread direction left turn


• Length error ±1%


• The maximum drilling depth is more than 12 meters

Note: Tensile strength and length can be made according to customer design requirements.

 

 

 

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