Handan Zhongfu Industrial And Mining Accessories Co., Ltd.
Handan ZhongFu company is a professional manufacturer for underground mining supporting products with over ten year experience. We can manufacture Split sets ,friction bolt, Combi split sets, Expandable friction bolt,Swellex, Threaded bar bolt, Cable bolt, Combi cable bolt, Welded mesh, Domed plate, Nuts, other mining Equipment.
**Types of Welded Wire Mesh Used in Underground Mining:**
* **Reinforcement Mesh/Support Mesh:** This is the most common type, typically made of high-tensile steel wire. It's designed to provide structural support to the rock mass, preventing rock bursts and roof falls. Mesh aperture sizes vary depending on the specific ground conditions and expected loads.
* **Screening Mesh/Safety Mesh:** This mesh is used to catch loose rock and debris, preventing them from falling and potentially injuring workers or damaging equipment. It often has smaller apertures than reinforcement mesh.
* **Shotcrete Reinforcement Mesh:** Used in conjunction with shotcrete (sprayed concrete) to provide additional reinforcement and prevent cracking. It is typically embedded within the shotcrete layer.
* **Rib and Mesh:** This is a system where steel ribs are installed with wire mesh in between, providing a more robust support system for areas with very poor ground conditions.
**Selection Methods for Welded Wire Mesh in Underground Mining:**
The selection of the appropriate type of welded wire mesh depends on several factors:
1. **Geotechnical Assessment:** A thorough geotechnical investigation is crucial to determine the rock type, strength, fracture density, and stress conditions of the mine.
2. **Expected Loads:** Determine the anticipated ground loads and stresses that the mesh will need to withstand. This will dictate the wire gauge, aperture size, and tensile strength requirements.
3. **Corrosion Potential:** If the mine environment is corrosive (e.g., high humidity, acidic water), consider using stainless steel or galvanized mesh to prevent degradation and ensure long-term performance.
4. **Mesh Aperture Size:** Smaller apertures are generally preferred for preventing the fall of small rocks and debris, while larger apertures may be acceptable for reinforcement in stable ground.
5. **Wire Gauge (Diameter):** Thicker wires provide greater strength and resistance to deformation. Select the appropriate gauge based on the expected loads.
6. **Regulations and Standards:** Adhere to relevant mining regulations and industry standards for ground support.
**Specific factors to consider:**
* **Tensile Strength and Yield Strength:** Higher values are preferred for areas with high stress.
* **Elongation:** Greater elongation allows the mesh to deform under load without fracturing.
* **Corrosion Resistance:** Select materials that are resistant to the specific conditions in the mine.
* **Mesh Size and Shape:** Choose the appropriate dimensions for the area to be supported, considering the geometry of the excavation.
* **Welding Quality:** Ensure that the welds are strong and consistent to maintain the integrity of the mesh.
**Construction Considerations (Installation Elements):**
Proper installation is crucial for the effectiveness of welded wire mesh in underground mining. The following are key considerations:
1. **Surface Preparation:** The rock surface should be cleaned and free of loose material before installing the mesh.
2. **Overlap:** Adjacent mesh panels should be overlapped sufficiently (typically 150-300 mm or 6-12 inches) to ensure continuity of support.
3. **Anchoring:** The mesh should be securely anchored to the rock mass using bolts, plates, or other appropriate anchoring systems. The anchoring pattern and type should be designed based on the geotechnical assessment.
4. **Tensioning:** In some cases, the mesh may need to be tensioned during installation to ensure that it is in close contact with the rock surface and provides immediate support.
5. **Support System Integration:** Welded wire mesh is often used in conjunction with other ground support systems, such as rock bolts, shotcrete, and steel sets. Ensure that the different support elements are properly integrated to provide a comprehensive solution.
6. **Quality Control:** Regular inspections should be conducted to ensure that the mesh is properly installed and maintained.
7. **Safety:** Installation should be performed by trained personnel following established safety protocols.
Our address
West Side Of Jianshe Street, Southwest Industrial Zone, Linmingguan Town, Handan, Hebei, China
Phone Number
+8615830050566
zfgongkuang@aliyun.com
