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+86 022 2376 3704
Prestressed Material
Cable bolt could be indented seven-wire uncoated steel strand. The outer wires have indentations that inhibit longitudinal movement of the strand relative to the concrete surrounding the strand. We produce this cable bolts in accordance with ASTM A886/A886M, GB/T5224
Cable bolts are a type of reinforcement used in mining and tunneling operations to enhance the stability and safety of underground excavations. They consist of a steel cable inserted into a borehole drilled into the rock or soil, which is then grouted in place with cement or resin.
The primary purpose of cable bolts is to provide support by anchoring unstable rock formations and preventing collapses or falls of ground. They are especially useful in areas where traditional ground support methods like rock bolts or mesh may not provide sufficient reinforcement.
ADVANTAGES
---- High tensile strength
---- Good bonding performance
---- The Cable bolts has low relaxation losses of not more than 2.5 % when initially loaded to 70 % of specified minimum breaking strength or not more than 3.5 % when loaded to 80 % of specified minimum breaking strength of the strand after 1000 hours of testing.
Cable bolts come in various lengths and diameters to accommodate different geological conditions and load requirements. They are commonly used in conjunction with other ground support systems to create a comprehensive reinforcement network within underground mines and tunnels. Welcome to contact us to get the price of different specifications of mining cable bolts.
USE
Cable bolt is used in various industries and applications where reinforcement of rock or soil is necessary to ensure stability and safety.
Mining: Cable bolts are extensively used in underground mining operations to reinforce roofs and sidewalls in tunnels, shafts, and stopes. They help prevent roof collapses and stabilize the surrounding rock mass, ensuring the safety of miners and equipment.
Tunneling: In tunnel construction, cable bolts are employed to provide additional support to the tunnel walls and ceilings, especially in areas with poor rock quality or high stress conditions. They help control rock movement and minimize the risk of rock falls or collapses during excavation.
Civil Engineering: Cable bolts are used in civil engineering projects such as the construction of underground caverns, tunnels, and foundations for buildings and infrastructure. They provide stability and reinforcement in soil and rock masses, particularly in urban areas where excavation activities can impact nearby structures.
Slope Stabilization: Cable bolts are utilized to stabilize slopes in open-pit mines, quarries, and natural slopes prone to instability or erosion. They help prevent slope failures and landslides by reinforcing the rock or soil mass and redistributing stresses.
Roof Support in Underground Structures: Cable bolts are employed in underground structures such as subway stations, parking garages, and utility tunnels to reinforce the roof and walls, ensuring structural integrity and safety.
Rockfall Protection: In areas susceptible to rockfall hazards, cable bolts may be installed to secure loose rocks or boulders to the rock mass, reducing the risk of rockfall incidents and protecting infrastructure and personnel below.
SPECIFICATIONS
The size of a cable bolt can vary depending on factors such as the specific application, geological conditions, and load requirements. However, cable bolts typically range in diameter from around 15 millimeters (0.6 inches) to 32 millimeters (1.25 inches) or even larger.
The length of cable bolts can also vary widely, ranging from a few meters to over 30 meters (100 feet) in length, depending on the depth of the excavation and the stability requirements of the surrounding rock or soil.
| Grade | Nominal diameter | Tolerance on Diameter | Nominal Area of Section | Weight of strand | Tensile Strength | Minimum Breaking load | Minimum load at 1% Extension | Elongation Lo=610mm | The Relaxation at 1000h (initial load to 70% of nominal max load ) (r/%) Not more than | |||
| (mm) | (in.) | (mm) | (mm2) | (in.2) | (kg/ 1000m) | (lb/ 1000ft) | (N/mm2) | (KN) | (KN) | (%) | ||
| 270 (1860) | 15.24 | 3/5 | +0.65,-0.15 | 140.00 | 0.217 | 1102 | 740 | 1860 | 260.40 | 234.40 | 3.5 | 2.5 |
PACKAGE
As per clients’ requirement
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