Hollow Steel Anchor R51 Self Drilling Anchor Bolts Soil Nailing
Roof Support Rock Anchor Bolt
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.
Advantages:
1, easy and similar operation principle for different rock mass and
soil conditions.
2, drilling, anchoring and grouting can be performed in one single
operation.
3, no pre-drilling of a borehole by using a casing tube and
extension rods with subsequent anchor installationnecessary.
4, minor space requirement for the accomplishment of anchoring.
5, optimized machinery and manpower requirements.
6, basic dimensioning of the required anchoring forces by choosing
the appropriate anchor type.
7, optimum bonding of the profiled anchor rod and the grout.
8, adjustment of the drill bit design and diameter to different
rock mass and ground conditions.
9, simple anti-corrosion method available.
10, appropriate for temporary or permanent applications
Specification
Anchor Bar
| Model | R51L/36 | R51L/34 | R51N/33 | R51N/31 | R51/760 | R51/540 |
| Outside Diameter (mm) | 51 |
| Internal Diameter (mm) | 35.5 | 34 | 33 | 30.6 | 30.2 | 33 |
| Cross Sectional Area (mm2) | 802 | 890 | 968 | 1070 | 1146 | 968 |
| Ultimater Load (kN) | ≥550 | ≥550 | ≥800 | ≥800 | ≥950 | ≥660 |
| Yield Load (kN) | ≥450 | ≥450 | ≥630 | ≥630 | ≥760 | ≥540 |
| Weight (kg/m) | 4.8 | 6 | 4.8 | | 5.5 | 6 |
| Thread Type | R51 |
| Raw Material | 40Cr/Q345B/20Cr |
| Length (m) | 1-4m |
Anchor Nut
| Model | R51L/36 | R51L/34 | R51N/33 | R51N/31 | R51/760 | R51/540 |
| Key Size (mm) | 75 |
| Length (mm) | 70 | 90 | 70 |
| Hardness (HRC) | 20-30 |
| Thread Type | R51 |
| Raw Material | C45/40Cr |
| Unit Weight (kg) | 1.5 | 1.92 | 1.5 |
| Thread | R51 |
Anchor Plate
| Model | R51L/36 | R51L/34 | R51N/33 | R51N/31 | R51/760 | R51/540 |
| Size (mm) | 200x200 | 250x250 | 220x220 |
| Thickness (mm) | 30 | 40 | 30 |
| Hole Diameter (mm) | 60 |
| Unit Weight (kg) | 8.8 | 14 | 18.5 | 8.8 |
Anchor Coupling
| Model | R51L/36 | R51L/34 | R51N/33 | R51N/31 | R51/760 | R51/540 |
| Outside Diameter (mm) | 63 |
| Length (mm) | 140 | 200 | 260 | 180 |
| Hardness (HRC) | 20-30 |
| Thread Type | R51 |
| Raw Material | 40Cr |
| Unit Weight (kg) | 1.26 | 1.9 | 2.46 | 1.68 |
| Thread | R51 |
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) | D90/1.6
D100/1.82
D115/2.5 | D90/1.75
D100/2.46
D115/2.8
D130/4
D150/7.7 | D90/1.35
D100/.38 | D115/2.06 | D76/1.3
D90/1.90
D100/2.4
D115/3.25
D130/5.26
D150/10.25 | D100/1.2
D110/1.2
D130/1.8
D150/2.4
D175/2.6
D200/3.2 | D115/2.1 | D76/1.3
D90/1.9
D115/3.25
D130/5.26
D150/10.25 |
| Hardness (HRC/HRA) | 50-55 | 87-89 | 50-55 | 50-55 | 87-89 | 43-48 | 50-55 | 87-89 |
| Thread Type | R51 |
| Raw Material | EN10083-3/2006 |
| Thread | R51 |
Application
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
