Rock conditions underground will change due to geologic structures, stress from excavation, blasting vibration, groundwater infiltration and changing operational conditions. Roof/floor/wall instability can be caused by joints/faults/fractured rock and/or loose blocks. These conditions present a safety hazard to personnel and equipment and can cause production delays.
Hard rock ground support typically includes some type of rock reinforcement integrated with surface retention. Rock bolts and cable bolts are used to reinforce rock mass while steel mesh, bearing plates and other surface support components are installed to help contain loose rock between the points of reinforcement.
Wanfeng offers ground support products that can be used to build temporary or permanent support systems for mine development as well as production areas, haulage roadways, shafts and underground chambers.
Hard rock mines may encounter multiple ground conditions during development. Typical conditions include:
1.Loose/Fractured Ground
Tensile fracturing from blasting and natural joints can leave blocks of loose rock around underground openings. Reinforcement products help bridge loose or incompetent rock to adjacent competent rock.
2. Rockfalls
Mine roofs and sidewalls may need regular reinforcement and surface support to limit loose rock and exposure to falling rock.
3. High or Variable Ground Stress
Deep level mining and excavation induced stress create deformation, spalling or damage to rock around underground openings. Support products installed in these areas should be chosen based on expected loading and displacement.
4. Large Openings
Workshops, loading rooms, intersections and chambers may have larger spans requiring longer or heavier reinforcement load capacities.
5. Wet Conditions
Groundwater, humidity, and aggressive mine environments can reduce the longevity of steel components. Coatings or corrosion-protection can be necessary.
For underground hard rock mining applications, Wanfeng can manufacture reinforcement and surface- support components to work with each others’ products based on customer provided specifications, drawings and/or application requirements.
Typical components that could make up an integrated ground support solution include:
Correct support configuration will vary based on geological conditions, excavation size and shape, stress conditions, desired service life and installation considerations.
Ground support design should be completed and products selected by a qualified mining or geotechnical engineer familiar with the specific project conditions.
1.Rock Bolts
Rock bolts are commonly used to support mine roofs, ribs and underground roadways. These devices limit rock movement and improve rock-bolt to rock-block interactions with the surrounding mass.
Available rock bolts can be manufactured in various diameters, lengths, thread profiles and steel grades to meet your specific needs. All products can be made to customer drawings and technical specifications.
Typical uses include:
2. Friction Bolts & Split Sets
Friction bolts provide immediate support upon installation by way of contact between the bolt and borehole wall. These are commonly used for mine development headings and roadways where installation speed is essential.
Typical uses include:
Profiles and surface treatments can be modified to your specifications. Dimensions can be manufactured to confirmed drawings.
3. Cable Bolts
Cable bolts are often used when longer anchorages lengths or deeper reinforcement is required. These are ideal for large underground excavations, intersections, production areas or other areas with significant geological features.
Typical uses include:
Specifications for cable bolts should be confirmed to determine the required length, strand structure, anchorage method and required load capacity.
4. Mine Support Mesh
Steel mesh adds surface retention between installed rock bolts. Mesh helps contain loose rocks fragments and can help distribute point loads across a larger support area.
Mesh is available in a variety of wire diameters, aperture sizes, panel dimensions and surface treatments.
Typical uses include:
5. Bearing Plates
Bearing plates spread loads across the rock surface and help secure mesh or other surface support materials.
Available plate shapes, thicknesses, hole sizes and profiles can be modified to suit your bolting system and installation specifications.
Typical options:
6. Nuts, Couplers & Accessories
Every ground support system requires compatible accessories for proper assembly and installation.
Items we can provide:
Thread sizes and component dimensions should be verified before production.
| Ground condition or application | Typical support requirement | Relevant product categories |
| Competent rock with isolated loose blocks | Local reinforcement | Rock bolts and bearing plates |
| Jointed or fractured mine roof | Reinforcement and surface retention | Rock bolts, mesh and plates |
| Mine development roadway | Rapid installation and immediate support | Friction bolts, mesh and plates |
| Wide intersection or underground chamber | Deeper reinforcement | Cable bolts and surface support |
| Wet underground environment | Improved corrosion resistance | Galvanized or coated components |
| Restricted installation space | Equipment-compatible dimensions | Customized bolts and mesh panels |
| High-stress or deforming ground | Verified load and deformation capacity | Site-specific yielding or dynamic products |
NOTE: This chart is intended to show general guidance only. Project specific support needs should be based on geotechnical conditions and engineering analysis.
Drills, capacities and mine ground support standards vary widely at hard rock mines. Often mines specify ground support products to fit existing capacities. Wanfeng can customize products to fit your drills, installation systems and mine ground support standards. Customization is done to confirmed drawings, samples or technical specifications.
Customization options include:
Customers can submit drawings, technical specifications, required quantities and application information for review.
Repeatable manufacturing is critical for underground ground support products. Wanfeng performs quality controls on production and inspections based on the confirmed product specification and purchase requirements.
Quality Assurance activities include:
Records of inspections and available test reports can be supplied based on agreed upon order requirements.
1.Over 10 Years Manufacturing Experience
years of experience in manufacturing mining support products have taught us the value of dimensional accuracy, component interchangeability and controlled batch-to-batch production.
2. One-stop Product Supply
Supply rock bolts, mesh, bearing plates, nuts, couplers and other related products from one manufacturer.
3. Customized to your requirements
Supply products manufactured to drawings, samples, application specification or agreed-upon technical standards.
4.Controlled Batch Production
Maintain repeat order and large quantity production consistency through our controlled production and inspection processes.
5. Export and Project Supply Capability
Experienced in helping our international customers with export crates, paperwork and full project coordination.
6. Long-term Supplier Relationships
Wanfeng has an established history of working with mines, contractors, importers and distributors who want a reliable source of ground support equipment.
Technical information allows us to determine product suitability and process your quotation faster and more accurately.
Please include::
Q1: What are some common products for hard rock mining ground support?
Ans: Rock bolts, friction bolts, cable bolts, bearing plates and steel mesh are typical products. Various combinations of these products are used together to support rock mass and contain fallen rock around openings in mine roofs, ribs and underground excavations.
Q2: How do rock bolts and steel mesh work together to support ground?
Ans: Rock bolts stabilize and strengthen surrounding rock and anchor the support system into stable ground. Steel mesh blankets the exposed rock surface and holds small rocks between bolt locations. Bearing plates fit onto the bolts and interface with mesh to help distribute point loads.
Q3:Can rock bolt dimensions be customized?
Ans:Yes. Rock bolt diameter, length, thread type, thread pitch, steel grade and surface treatment are capable of being produced to agreed upon drawings or specifications.
Q4: What details are required to provide a quote?
Ans: The product type, dimensions, material or strength requirements, thread specifications, surface treatment, quantity and delivery location are typically required to be provided by the customer. Drawings and samples can be extremely helpful when ordering customized products.
Q5: Does Wanfeng offer galvanized products for wet mine conditions?
Ans: Galvanized or alternative corrosion-resistant options may be available depending on the product and project requirements. The coating specification and service environment should be established prior to production.
Q6: Can Wanfeng provide bolts and mesh as a complete package?
Ans: Multiple compatible ground support components can be provided including rock bolts, bearing plates, mesh, nuts and rock bolt couplers. Dimensions and thread type should be cross checked during the technical review process.
Q7: Does Wanfeng offer design service for ground support systems?
Ans: Design consultation is available but Wanfeng typically manufactures and supplies ground support products based on customer provided specifications. Final determination or sign off of the support system design and installation methods should be completed by a qualified mining engineer or geotechnical engineer.
Q8:Can Wanfeng manufacture product to customer drawings?
Ans: Yes, OEM and drawing based production can be reviewed and confirmed after comparing dimensions, material specifications, tolerances, performance expectations and order quantity.
