A roof bolt is a critical component used in underground mining, tunneling, and civil engineering for ground support and stabilization. It is installed in the roof or walls of tunnels or mine shafts to prevent rockfalls, cave-ins, and other hazards. Roof bolts are typically used in conjunction with mesh or other support systems to create a secure, stabilized environment for workers and machinery in underground spaces.
- Design:Roof bolts are typically long, cylindrical fasteners that are anchored into the rock or soil using specialized drilling and installation equipment. The bolts create tension, pulling the surrounding rock toward the bolt, which stabilizes the roof or walls of tunnels and shafts.
- Applications:
- Underground Mining: Roof bolts are widely used in mining operations, including coal, gold, and diamond mining, to stabilize the roof and walls of tunnels, shafts, and chambers, reducing the risk of collapse or rockfalls.
- Tunneling Projects: Used extensively in tunneling for construction projects such as highways, railways, and utility tunnels, roof bolts help ensure the structural integrity of tunnel walls and ceilings.
- Civil Engineering & Infrastructure Projects: In addition to mining and tunneling, roof bolts are used in underground construction, such as utility vaults, sewage systems, and subway systems.
- Slope Stabilization: Roof bolts may also be used in open-pit mining operations to stabilize walls and prevent rockslides, as well as in slope reinforcement for road construction or excavation.
- Safety & Ground Support in Construction: Used in the construction of deep foundations, deep excavations, and deep shafts in challenging geotechnical conditions to prevent collapsing.
- Materials:Carbon steel is commonly used for roof bolts due to its strength, cost-effectiveness, and ease of manufacture. It is suitable for many applications but may need additional treatment for corrosion resistance in certain environments.
- Configurations: 7/8″ x 3-1/4″ Hex Shank, 10″ in length
| Resin Covereage Table | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hole Diameter | ||||||||||||||
| Inch | 1 | 1-18 | 1-14 | 1-38 | 1-12 | 1-58 | 1-12 | 1-58 | 1-34 | 1-78 | 2 | 2-14 | 2 | 2-14 |
| MM | 26 | 29 | 2 | 36 | 38 | 42 | 38 | 42 | 45 | 48 | 51 | 58 | 51 | 58 |
| Cartridge Diameter | ||||||||||||||
| Inch | 78 | 1 | 1-18 | 1-14 | 1-14 | 1-14 | 1-38 | 1-38 | 1-916 | 1-916 | 1-916 | 1-916 | 1-34 | 1-34 |
| MM | 23 | 26 | 28 | 32 | 32 | 36 | 36 | 36 | 40 | 40 | 40 | 40 | 45 | 45 |
| BoltSize | Coverage Multiplier | |||||||||||||
| 34“ | 1.75 | 1.43 | ||||||||||||
| 78“ | 2.01 | 1.59 | 1.39 | 1.27 | ||||||||||
| 1″ | 2.25 | 1.75 | 1.25 | 1.52 | 1.16 | 1.19 | ||||||||
| 1-18“ | 1.60 | 1.14 | 1.94 | 1.38 | 1.37 | |||||||||
| 1-14“ | 1.53 | .85 | 1.69 | 1.3 | 1.28 | |||||||||
| 1-38“ | 2.27 | .61 | 1.21 | 1.52 | 1 | |||||||||
