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Cross counter sunk self drilling bolt / screws
Finish: zinc coated
Head style: cross recessed countersunk
Length: 13 mm, 16mm, 19 mm, 25 mm, 32 mm, 38 mm, 50 mm, etc..
Materail: stainless steel, steel

Flange Bolts DIN6921

Hex hex bolts, din931, din933, din7990,din960,961.
ANSI/ASME B18.2.1

Wheel & Hub Bolt Assy

U Bolt

Advantages Of Rock Bolting

Why Is Rock Bolting Essential in Underground Construction?
Rock bolting is a widely used technique in underground construction to provide essential support and stabilize rock formations. By inserting steel bolts into rock masses, rock bolting creates a secure bond between the rock and the structure, preventing dangerous rockfalls and improving safety. This technique is crucial in mining, tunneling, and civil engineering projects where the integrity of the surrounding rock is vital. In this article, we will explore the key advantages of rock bolting, how it contributes to safety and stability, and why it is indispensable in modern construction.



Enhanced Safety: Rock bolting improves safety by stabilizing rock masses, reducing the risk of rockfalls, collapses, and other hazards in mining operations, tunnels, slopes, and underground excavations. This helps protect workers, equipment, and infrastructure from potential accidents and injuries.

Stabilization of Rock Masses: Rock bolting reinforces and stabilizes rock masses by providing additional support and anchorage. By installing rock bolts, it's possible to strengthen fractured, weathered, or unstable rock formations, making them safer and more suitable for excavation, construction, or mining activities.

Flexibility and Adaptability: Rock bolting is a versatile technique that can be tailored to suit different geological conditions, rock types, and engineering requirements. Various types of rock bolts, including mechanical, grouted, and cable bolts, can be used in combination with other support measures such as shotcrete, mesh, and rock dowels to achieve optimal stabilization.

Cost-Effective Solution: Rock bolting is often a cost-effective solution for stabilizing rock masses compared to alternative methods such as rock reinforcement with steel mesh, shotcrete lining, or ground improvement techniques. It can be implemented relatively quickly and requires minimal excavation or disturbance of the surrounding environment.

Split Set Mining Systems

Friction Bolt Mining Systems
Friction Bolt mining systems are a type of rock reinforcement method used in underground mining operations to support excavations and prevent rockfalls or collapses.

Friction Bolt mining systems are commonly used in underground mining operations where ground conditions are poor or unstable. They are particularly effective in areas where traditional support methods, such as timber or steel sets, may be impractical or insufficient. Friction bolts can be installed quickly and easily, making them a popular choice for temporary or permanent rock reinforcement.

â?? Friction Bolts
Friction Bolts are typically steel tubes that are longitudinally split along their length. They are installed by inserting them into predrilled holes in the rock. As they are inserted, the split portion of the tube expands, exerting pressure against the rock walls. This pressure helps to support the surrounding rock mass and prevent it from collapsing.



â?? Friction Bolts
Friction bolts, also known as friction rock bolts or expansion shell bolts, are another component of Friction Bolt mining systems. These bolts consist of a steel rod with an expandable shell at one end. Similar to Friction Bolts, friction bolts are installed by inserting them into predrilled holes in the rock. Once in place, the shell is expanded, creating friction between the bolt and the surrounding rock, which helps to provide additional support.

Mesh Bolt

Mesh bolt is a specialized type of fastener used in construction and industrial applications, particularly in securing wire mesh or fencing to various surfaces. It typically consists of a threaded rod with a flat head and a square or hexagonal nut. The flat head is designed to sit flush against the surface, while the threaded rod extends through the mesh and is secured in place using the nut.

Mesh bolts are essential components for securing wire mesh and fencing in various applications, offering strength, reliability, and ease of installation.

Applications of Friction Bolt Mesh Bolts
Mesh bolts are commonly used in a variety of applications, including fencing, landscaping, construction, and industrial settings. They are often used to secure wire mesh panels for security fencing, animal enclosures, garden trellises, and construction site barriers, among other uses.

â?? Mining Support: It is extensively used in mining operations to prevent rockfalls and stabilize tunnel walls. They provide essential support in creating a safe working environment for miners.

â?? Tunneling Projects: Widely applied in tunnel construction, Mesh Bolt offers robust reinforcement to tunnel walls, ensuring structural stability and minimizing the risk of collapses.

â?? Civil Engineering Projects: Mesh Bolts find utility in various civil engineering projects, providing geological support in scenarios such as underground foundations, tunnels, and excavations.

We are a top stainless steel fastener manufacturer, specializing in the production of various industrial standard stainless steel fasteners. Products are widely used in key industries and major engineering projects at home and abroad, such as petroleum and natural gas, construction, railway transportation, new energy, shipping and ports, communication power supplies, petrochemicals and so on. We are the world's largest supply center for stainless steel fasteners and can meet all customer needs. Products include: bolts, studs, nuts, screws, washers, retaining rings, components, rivets, pins, teeth, etc. We have obtained ISO9001:2015, ISO 14001:2015, ISO 45001:2018, IATF16949, ISO 22163, PED, TUV and other certification reports.
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Toyota Standard Product Series

Wheel Bolt

Series of Mitsubishi Standard Products

Model U Product Series

Nuts

All kinds of screw and nuts per the requirement of customer.

Specifications: 45/90, 45/100,50/105, 51/105, 55/110, 58/124, 60/125, 65/120, 65/132, 68/143, 70/140, 75/150, 80/143, 92/188

The compression ratio of the screw can be designed according to different products and mixtures.

Nitrided Hardness: HV 900-1000
Nitrided Case Depth: 0.45mm-0.7mm
Alloy hardness: HRC50-65
Alloy depth: 0.8mm-2.0mm
Materials: Quality 38CrMoAlA
Advanced nitriding process
Corrosion&Abrasion resistance bimetal spraying process

Rubber pined screw and barrel specification: 75mm~+200mm
Rubber cold or hot-feed screw and barrel specification: 30mm~+250 mm
Nitrided Hardness: HV900-1000
Nitrided case depth: 0.45mm-0.7mm
Alloy hardness: HRC50-65
Alloy Depth: 0.8mm-2.0mm
Materials: Quality 38CrMoAlA
Advanced nitriding process
Corrosion&Abrasion resistance bimetal spraying process

Barrel & screw for extruder
Specifications: 15mm -0mm
Length/Diameter Ratio: L/D=15-45

Screws can be selected from ordinary, gradual, mutational, pinned, shielding, separating and exhausting types. The compression ratio of screw can be designed according to different raw materials and requirements of clients.