R38N SDA Hollow Grouted Self Drilling Anchors Rock Bolt For Slope
Protection
The Self Drilling Anchor (SDA) system is a bolting solution for difficult ground and rock
conditions. The system enables drilling and grouting in one
operation, making much saving in jobsite and project time. Which is
comprised of a hollow threaded anchor bar with a sacrificial drill
bit that performs drilling, anchoring and grouting in a single
operation. Self drilling anchor system is mainly used in slope
stabilization, tunneling pre-support, foundations with micro piles
etc jobs, which is widely used in mining, tunneling, railway, metro
construction etc projects.
Application:
Self drilling anchor system is mainly used in slope stabilization,
tunneling pre-support, foundations with micropiles, it is also
widely used in the railway system, metro project etc. It can be
installed in sites with weak rocks, loose soil, weathered layer,
sand with stone layer and so difficult to create a hole in complex
formations. The unconsolidated ground condition favor the
self-drilling anchor bolt technique for fast and simple method of
installation compared to the traditional method.
Features and Advantages
• Particularly suitable for difficult ground conditions.
• A high rate of installation since drilling, placing and grouting
can be performed in one single operation.
• Self drilling system eliminates the requirement for a cased
borehole.
• Installation with simultaneous drilling and grouting possible.
• Easy installation in all directions, also upwards.
• Suitable for working in limited space, height and in areas of
difficult access.
• Simple post grouting system.
• Hot-dipped galvanizing for corrosion protection
Specification
Anchor Bar
| Model | R38N/21 | R38N/19 | R38N/450 | R38/480 | R38/530 |
| Outside Diameter (mm) | 38 |
| Internal Diameter (mm) | 22.5 | 19.3 | 22.5 | 20.3 | 19.3 |
| Cross Sectional Area (mm2) | 611 | 764 | 611 | 700 | 764 |
| Ultimater Load (kN) | ≥500 | ≥500 | ≥550 | ≥600 | ≥660 |
| Yield Load (kN) | ≥400 | ≥400 | ≥450 | ≥480 | ≥530 |
| Weight (kg/m) | 4.8 | 6 | 4.8 | 5.5 | 6 |
| Thread Type | R3238 |
| Raw Material | 40Cr/Q345B/20Cr |
| Length (m) | 1-4m |
Anchor Nut
| Model | R38N/21 | R38N/19 | R38N/450 | R38/480 | R38/530 |
| Key Size (mm) | 50 |
| Length (mm) | 60 | 60 | 70 | 80 | 80 |
| Hardness (HRC) | 20-30 |
| Thread Type | R38 |
| Raw Material | C45/40Cr/Q345B/20Cr |
| Unit Weight (kg) | 0.5 | 0.5 | 0.58 | 0.66 | 0.66 |
| Thread | R38 |
Anchor Plate
| Model | R38N/21 | R38N/19 | R38N/450 | R38/480 | R38/530 |
| Size (mm) | 200x200 |
| Thickness (mm) | 12 | 16 |
| Hole Diameter (mm) | 41 |
| Unit Weight (kg) | 3.6 | 4.8 |
Anchor Coupling
| Model | R38N/21 | R38N/19 | R38N/450 | R38/480 | R38/530 |
| Outside Diameter (mm) | 52 |
| Length (mm) | 220 | 220 | 250 | 280 | 300 |
| Hardness (HRC) | 20-30 |
| Thread Type | R38 |
| Raw Material | 40Cr |
| Unit Weight (kg) | 1.8 | 1.8 | 2.05 | 2.28 | 2.45 |
| Thread | R38 |
Anchor bits
| Model | EX | EXX | ESF | ESD | ESSF | EW | EY | EYY |
| Hardened Cross Bit
for loose to medium dense ground conditions | TC cross bit
for soft to medium rock formations | Hardened button bit
for unconsolidated rock with boulders | TC button bit
For medium rock formations | Clay and loam, sandy-cohesive mixed soils without obstructions | Hardened drop centrebit for fills | TC drop centre bit for Competent Ground&Stong Rock |
| Outside Diameter (mm)/ Unit Weight (kg) | D76/0.8
D90/1.55
D100/1.70
D115/2.66 | D76/1.06
D90/1.80
D100/1.9
D110/2.78
D115/3.03 | D76/1.15
D90/1.75
D100/2 | D115/2.3 | D76/1.4
D90/1.95
D100/2.7
D110/3.5
D115/3.9 | D76/0.73
D90/0.83
D100/1.00
D110/1.15
D115/1.00
D130/1.83
D150/2.80 | D76/0.85
D90/1.06
D115/2.30
D130/2.75 | D76/1.05
D90/1.32
D115/2.15 |
| Hardness (HRC/HRA) | 50-55 | 87-89 | 50-55 | 50-55 | 87-89 | 43-48 | 50-55 | 87-89 |
| Thread Type | R38 |
| Raw Material | EN10083-3/2006 |
| Thread | R38 |
Company Information:
The MIROC® Rock Drilling Tools product line by KSQ Technologies (Beijing) Co.Ltd. is the result of years of advanced engineering, precision
manufacturing, and dedication to the use of high-quality materials.
MIROC® Rock Drilling Tools are used by many drilling professionals
related to mining, construction, tunneling, and quarrying projects
around the globe.
MIROC® Rock Drilling and Ground Support Tools include:
Integral Rods
Plug Hole Rods
Tapered Drilling Tools
Extension Drilling Tools
Drifting and Tunneling Tools
Reaming Tools
Shank Rods
Shank Adapters (Striking Bars)
Down-the-hole (DTH) Bits
Down-the-hole (DTH) Hammers
PDC Bits
Tricone Bits
