Product Description
Hollow grouting anchor rod is a type of hollow anchor rod, mainly used for relatively stable and complete rock layers. Anchoring agents such as resin, engineering glue, and quick setting cement are injected from the center of the anchor rod, which has better anchoring quality than ordinary anchor rods.
Due to the emergence of self piercing hollow grouting anchor rods, hollow grouting anchor rods can also be used in loose soil conditions.
Product Type
1. Combination hollow anchor rod is a type of anchor rod that is combined with steel bars and equipped with an air outlet pipe. Its main feature is that it can be customized and extended.
2.The expansion shell type hollow grouting anchor rod is a device that generates anchoring force through the compression friction between the expansion shell and the inner wall of the anchor hole, and can apply pre-stress to fix the hollow anchor rod body in the center of the anchor hole.
3.Hollow self advancing anchor rods are mainly used for excavation and support construction in fault fracture zones. They play a role in supporting complex geological conditions, improving the bearing capacity of surrounding rock and ensuring its overall stability.
4.Hollow grouting anchor rod is pre drilled and directly inserted into the grouting for use.
Detailed Photos
Product Parameters
Material: Q355B
Diameter: Φ25, Φ30, Φ32, Φ35, Φ40
Length: On demand customization, length error <±1%
Thickness: 3mm, 4mm, 5mm
Features: Easy installation, no need for on-site thread processing; Upward exhaust anchor head; pressure casting
| Size |
O.D(MM) |
I.D(MM) |
Ultimate Load(KN) |
Yield Load(MM) |
Weight(KG/M) |
| R25-14 |
25 |
14 |
200 |
150 |
2.3 |
| R32L-22 |
32 |
22 |
210 |
160 |
2.8 |
| R32N-21 |
32 |
21 |
280 |
230 |
2.9 |
| R32N-18.5 |
32 |
18.5 |
280 |
230 |
3.4 |
| R32S-17.5 |
32 |
17.5 |
360 |
280 |
3.5 |
| R32S-15 |
32 |
15 |
360 |
280 |
4.1 |
| R38N-21 |
38 |
21 |
500 |
400 |
4.8 |
| R38N-19 |
38 |
19 |
500 |
400 |
5.5 |
| Thread Direction |
Left Hand |
Company Profile
Handan Zhongfu Industrial and Mining Accessories Co., Ltd. was established in 2011, located in Hebei-Yongnian, China's fastener industry base. It has built its own modern large-scale industrial and mining supporting material production workshop, anchoring automation workshop, mesh workshop and bolt workshop. It is a modern high-tech enterprise company integrating research and development, production and sales of industrial and mining supporting accessories.
There are 105 of us, including 16 high-tech researchers. The company is equipped with several large-scale testing equipments to ensure the product quality and safety in production. Through the team's perfect management system and strict production process, every production link will be treated with the meticulous care of craftsmen, and the defective products will never enter the market. The company mainly produces resin capsule, welding mesh, chain link mesh, rock bolt, domed plate, W copper belt, U-shaped steel frame and steel strand. Annual production of 30 million anchors, 3 million square meters of mesh, 21,000 anchors and more than 15,000 other accessories. It has been widely used in 28 provinces and cities in the whole park, and has made great contributions to the domestic coal mine support industry and the national railway and dam construction.
Now it has established long-term cooperation with more than a dozen domestic large coal mining enterprises such as China Coal Energy Group, Jinneng Group and shandong energy, and its products are exported to Southeast Asia, Africa and other developing countries.
Our Team
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