Handan Zhongfu Industrial And Mining Accessories Co., Ltd.
Superior Material Performance for Underground Safety. At ZF Mining, we prioritize the integrity of ourfriction bolts by using premium-grade Q235 and Q345 steel. These materials are specifically selected for their high yield strength and ductility, ensuring that our split set stabilizers provide reliable support even under high-pressure rock shifts.
TECHNICAL PERFORMANCE
|
Initial anchoring force |
3T~7T |
| Pipe ring pull-out load | 8T~10T |
| Anchor rod pipe tensile strength | 12T~13T |
| Corrosion Resistance | 20~30% higher than A3 steel, |
| Outside diameter (mm) | Ф30, Ф33, Ф40, Ф43(+0.5) etc. |
| Length (mm) | 1200,1500,1800,2000,2500 etc. |
| material | Q235, Q335, 16Mn, 20 Mnsi |
friction bolt Working principle
friction bolt Working principle
A friction anchor will exert three forces on the surrounding rock, a radial pressure on the hole wall over the full length of the slotted anchor, a frictional force to stop the surrounding rock from sliding down, and a supporting force from the friction anchor pallet, which makes the surrounding rock more stable.
Technical characteristics
full-length anchorage
Pipe seam anchor rod is a new type of anchor rod that actively strengthens the surrounding rock by anchoring the entire length. Its three-dimensional part is a high-strength steel pipe with a longitudinal seam.
Three directional force state
When installed in a borehole slightly smaller than the pipe diameter, radial pressure and frictional force can be immediately applied to the borehole wall throughout the entire length to prevent the surrounding rock from sliding down, combined with the support force of the anchor rod tray, thereby placing the surrounding rock in a three-dimensional stress state and achieving rock stability.
The anchoring force has significantly increased
The pipe seam anchor rod has a significant increase in anchoring force in the later stage under conditions such as blasting vibration and rock displacement. When the rock undergoes significant displacement, the anchor rod does not lose its supporting resistance, and it has better characteristics than the expansion shell anchor rod.
Quality assurance, easy installation
The raw material for the pipe seam anchor rod is high-strength alloy strip steel, and the anchor rod hole position is determined according to the design requirements. The drilling machine is used to drill holes, and the anchor plate is installed on the rod body. The anchor rod is driven into the hole with an impact drill.
The frictional force between the anchor rod and the rock mass is high
Three types of forces will be applied to the surrounding rock, one is radial pressure on the hole wall within the full length range of the pipe seam anchor rod, one is frictional force to prevent the surrounding rock from sliding down, and the other is the support force of the pipe seam anchor rod tray plate, which makes the surrounding rock more stable.
In rock formations: drilling diameter=(0.9-0.95) × anchor rod diameter
Drilling depth of anchor rod: anchor rod length+100mm drilling slope<1%
In coal seams: drilling diameter=(0.9-1.00) × anchor rod diameter
Drilling depth of anchor rod: anchor rod length+200mm, drilling slope<1.5%
01
Determine the anchor bolt hole position according to the design requirements and use drilling tools to drill holes.
02
Blow away the rock powder inside the hole with compressed air.
03
Install the anchor plate on the rod body and use an impact drill to drive the anchor rod into the hole.
Our address
West Side Of Jianshe Street, Southwest Industrial Zone, Linmingguan Town, Handan, Hebei, China
Phone Number
easonoflangben@langben.net
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