Hollow Solid Hollow Grouted Anchor Rod Rock Bolts for Mine Tunnel Roof Supporting
The main feature of the Normet Self-Drilling Anchor(SDA) system is the application of a single-use drill bit in combinnation with the rock bolt being used as a drill steel. Thus, the rock bolt is connected to the hydraulic rock drill by an adapter device and installed in the way a conventional borehole is drilled. The Normet SDA program consists of the following:
1. Single-use drill bits, which are available either hardened or with carbide inserts
2. Hollow, steel bars, with a continuous outside thread
3. Steel couplings, with a continuous inside thread
4. Steel nuts
5. Steel face plates
The bolts in this TDS are classified according to thread type and material:
R-type has a rope thread, and is available in sizes from R25-R51.
T-typle is according to international standard, and is available in sizes from T30 to T103.
FRP bolts are made out of fiberglass and available from S15 to SXX in both solid and hollow versions.
Applicaitions:
The Normet SDA system is suitable for simultaneous drilling and grouting in different applications:
Tunnelling and mining: Radial bolting, Spiling, Face stabilisation, Portal preparation
Ground Engineering: Ground consolidation and injection, Soil nailing, Slope stabilisation, Microinjection pile, Temporary support anchoring
PRODUCT SPECIFICATIONS
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Describe
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R32L
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R32N/21
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R32N/18.5
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R32S/17
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R32SS/14
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Outside diameter (mm)
|
32
|
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Internal diamneter (mm)
|
22
|
21
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18.5
|
17
|
14
|
|
Cross section Area (mm2)
|
356
|
363
|
443
|
440
|
522
|
|
Utlimate load (Kn)
|
260
|
280
|
280
|
360
|
405
|
|
Yield Load (Kn)
|
200
|
230
|
230
|
280
|
300
|
|
Weight (kg/m)
|
2.8
|
2.85
|
3.4
|
3.45
|
4.1
|
|
Rod material
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40Cr
|
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Length (m)
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3m 4m 6m 9m 10m
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Post time: Jul-02-2026