* High Strength Mining Self Drilling Hollow Rock Anchor Drill Bolt is widely used in road / rail construction and maintenance zmwm02 * Rock Bolt can be used for Tunneling & Mining * Rural environments * Private residences * Special foundations * Avalanche protection structures Alloy Drill: made of high-quality alloy by precision technology, with strong hardness and toughness, penetrating force can drill into a variety of rock Bolt Body: The most important component of the assembly, plays a major role in drilling and anchoring. Connection Sleeve: Play the role of connection when the bolt needs to be lengthened. Pad: can withstand greater surrounding rock stress. Screw Nut: The stress of surrounding rock can be concentrated on the pad.
Anchor bolt
Anchor bolt means a rod that transfers the structures or geotechnical load to a stable rock
formations, it consists of rod, drill bit, coupling, plate, grouting stopper and nut. It has been
widely used in tunnling, mining, slope stabilization, tunneldiseases treatment and roof supporting
of undergroundworks. It is for loose ground(clay, sand friable etc.) Hollow anchor rod is made of
seamless tube with high strength.
Features of hollow grounting anchor bolt
• 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
Applications in Tunneling & Ground Engineering
• Radial bolting
• Slope stabilization
• Forepoling
• Micro injection pile
• Face stabilization
• Temporary support anchor
• Portal preparation
• Soil nailing
Parameter of Best Price Full Threaded Steel Self Drilling Rock Bolt FHJ-20 Anchor Rod Mining Industry Drilling Hollow Anchor Rod
| Description | unit | R25 | R32N | R32N | R32S | R32SS | R38N | R51N | T30N |
| T40N | T52 | T76N | Outer Diameter | mm | 25 | 32 | 32 | 32 | 32 |
| 38 | 51 | 30 | 40 | 52 | 76 | Inner Diameter | mm | 14.5 | 21.5 |
| 20 | 20 | 18.5 | 23 | 36 | 15 | 21 | 26 | 52 | Area |
| mm2 | 255 | 331 | 369 | 369 | 407 | 548 | 892 | 331 | 803 |
| 1274 | 1991 | Ultimate Tensile Load | KN | 200 | 280 | 280 | 360 | 400 | 500 |
| 800 | 260 | 660 | 929 | 1660 | Yield Load | KN | 150 | 230 | 230 |
| 280 | 330 | 400 | 630 | 220 | 525 | 730 | 1200 | Ultimate Tensile Strength | Mpa |
| 784 | 846 | 758 | 976 | 983 | 912 | 897 | 785 | 822 | 729 |
Self-Drilling Anchor Bolt Description
| | R25N | R32N | R32S | R38N | R51L | R51N | T76N |
| Outside Diameter (mm) | 25 | 32 | 32 | 38 | 51 | 51 | 76 |
| Internal Diameter (mm) | 14 | 19 | 16 | 19 | 36 | 33 | 52 |
| Ultimate Load Capacity (kN) | 200 | 280 | 360 | 500 | 550 | 800 | 1600 |
| Yield Load Capacity (kN) | 150 | 230 | 280 | 400 | 450 | 630 | 1200 |
| Tensile Strength, Rm (N/mm2) | 800 | 800 | 800 | 800 | 800 | 800 | 800 |
| Yield Strength, Rp0.2 (N/mm2) | 650 | 650 | 650 | 650 | 650 | 650 | 650 |
| Weight (Kg/m) | 2.3 | 3.2 | 3.6 | 5.5 | 6.5 | 8.0 | 16.0 |
| Steel Grade | EN10083-1 (Alloy Structure Steel) |
| Compared to carbon steel, alloy structure steel has high anti-corrosion capacity and high mechanical. |
