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These dome bolts are specialized mining accessories made of carbon steel, designed primarily for underground mining support. Carbon steel provides high strength and wear resistance, enabling the bolts to withstand the pressure and harsh conditions of mining environments. Their dome-shaped head design ensures stable contact with mine rock surfaces or support structures, enhancing overall support reliability. As essential mining accessories, they are widely used to reinforce roadways, tunnels, or working faces, helping maintain the safety and stability of mining sites.
Product Specifications
Parameter Category
Specification Details
Product Type
Dome bolts (specialized carbon steel accessories for underground mining support)
Material
Carbon steel (Q235/Q345/Q460) - offers high tensile strength and wear resistance for mining harsh conditions
Application
Reinforcing mining roadways, tunnels, underground working faces; supporting mine rock walls/roofs
Standard Sizes
- Diameter: 16mm-24mm (common mining bolt sizes)
- Length: 1000mm-2400mm (adjustable per support depth needs)
Dome Head Dimensions
Diameter: 30mm-50mm; Thickness: 8mm-15mm - ensures large contact area with rock/support structures
Tensile Strength
345MPa-460MPa (varies by carbon steel grade; meets mining load-bearing requirements)
Surface Treatment
Hot-dip galvanizing / Zinc plating - anti-rust and corrosion resistance for humid underground environments
Thread Type
Metric coarse thread (ISO standard) - easy to install with matching nuts/washers
Applications
Reinforcing underground mining roadways to prevent rock collapse using carbon steel dome bolts
Supporting the roofs of mining tunnels with high-strength carbon steel dome bolts
Securing rock walls in underground mining working faces to maintain stability
Strengthening temporary mining passages during ore extraction operations
Reinforcing the surrounding rock of mining shafts to ensure structural safety
Frequently Asked Questions
Q: Why are these dome bolts made of carbon steel, and what advantage does this material bring for mining use?
A: Carbon steel (e.g., Q235/Q345) provides high tensile strength and wear resistance. These properties let the bolts withstand underground mining's harsh conditions—like rock pressure and humidity—without easily deforming or breaking.
Q: What makes the "dome head" design suitable for mining support?
A: The dome-shaped head has a larger contact area with rock surfaces or support structures. This design distributes pressure more evenly, preventing the bolt from sinking into soft rock and improving overall support stability.
Q: Are these dome bolts only used for specific parts of a mining site?
A: No, they're versatile mining accessories. They're commonly used to reinforce underground roadways, tunnel roofs, working faces, and even mining shafts—any area that needs rock wall or roof support.
Q: What sizes do these carbon steel dome bolts come in, and how to choose the right one?
A: Standard diameters range from 16mm-24mm, and lengths from 1000mm-2400mm. Choose based on the support depth needed (e.g., longer bolts for deeper rock layers) and the expected pressure at the mining site.
Q: Do these bolts have any protection against underground humidity?
A: Yes, they use surface treatments like hot-dip galvanizing or zinc plating. These treatments provide anti-rust and corrosion resistance, extending the bolts' service life in humid underground environments.
About Our Supplier
Jiaxing Xinchuang Hardware Co., Ltd.
Your Trusted Global Partner for Premier OEM Fasteners and Custom Industrial Solutions
Established in 2025, Xinchuang has evolved into a leading global manufacturer dedicated to providing high-quality fasteners and industrial components at competitive prices. With over a decade of industry experience and a state-of-the-art production facility, we specialize in delivering both standard and non-standard solutions tailored to the rigorous demands of clients worldwide.
Our Expertise and Capabilities
We are a vertically integrated manufacturer covering production, plating/finishing, and global export. Our extensive product capabilities meet both imperial and metric standards across a wide range of sizes (M1 to M100) and grades (4.8, 6.8, 8.8, 10.9, 12.9).
Core Manufacturing Competencies
Standard Fasteners: Screws, Nuts, Washers, Anchors, Pins, Keys, Threaded Rods, and Socket Screws
Materials & Finishes: High-grade Stainless Steel, Carbon Steel, with durable Zinc, Plain, and Galvanized finishing options
Customization and R&D Strengths
What differentiates Xinchuang is our robust OEM/ODM capability. We operate primarily on a made-to-order basis, ensuring every batch is freshly manufactured to your exact specifications. Backed by a dedicated in-house R&D department and design team, we excel at engineering specially designed fasteners for unique project needs.
Reliable Production and Service
We understand that project success relies on component caliber and timely delivery. Through efficient production management, we ensure reliable delivery times for production orders (typically 30-40 days). We are committed to providing extensive cost savings and supply chain security for our customers through consistent quality and dependable lead times.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Exporter
Year Established:
1996
Total Annual:
50000000-80000000
Employee Number:
50~100
Ecer Certification:
Verified Supplier
Founded in Jiaxing, Zhejiang Province—one of China’s central manufacturing hubs for mechanical hardware—Jiaxing Xinchuang Hardware Co., Ltd. is a professional manufacturer and exporter specializing in high-strength standard and non-standard fasteners, automotive hardware, and custo... Founded in Jiaxing, Zhejiang Province—one of China’s central manufacturing hubs for mechanical hardware—Jiaxing Xinchuang Hardware Co., Ltd. is a professional manufacturer and exporter specializing in high-strength standard and non-standard fasteners, automotive hardware, and custo...