Dome Plate

What Is Rock Bolt plate?

Rock bolt plates, also known as bearing plates or washer plates, are critical components in rock bolting systems. These plates are typically circular or square-shaped metal plates with holes in the center to allow the rock bolt to pass through. They are placed between the rock bolt head and the rock surface to distribute the load and ensure proper load transfer. The primary function of rock bolt plates is to increase the bearing capacity and improve the connection between the rock bolt and the rock mass. By distributing the load over a larger area, rock bolt plates help reduce the stress concentration at the bolt head, preventing failure or deformation of the surrounding rock.

Rock bolt plates are made of durable materials, such as steel, to withstand the high loads and provide long-lasting support. They are available in various sizes and thicknesses to accommodate different rock bolt diameters and load requirements. During rock bolt installation, the plates are placed against the rock surface, and the rock bolt is inserted through the holes. The plate acts as a bearing surface, supporting the compressive forces applied to the rock bolt.

function of rock bolt plate

 

As an important part of the anchor rod support system, the performance of the anchor rod tray directly affects the support effect of the anchor rod. The function of the tray is to transfer the thrust generated by the locking torque of the nut to the top wall to generate initial anchoring force, and at the same time, to transfer the pressure of the tunnel top wall to the anchor rod, generating working resistance, jointly reinforcing the surrounding rock, and preventing the displacement of the tunnel top wall. So when choosing a tray, one thing is to meet the matching of the strength between the anchor rod tray and the anchor rod body, in order to avoid the phenomenon of anchor rod perforation caused by insufficient strength of the anchor rod tray. The second is to meet the matching between the anchor rod tray and the anchor rod body on the support structure, to avoid uneven stress on the anchor rod body and nut caused by the mismatch between the anchor rod body and the tray on the support structure, which affects the support effect of the tunnel.

rock bolt plate

 

 

Handan Zhongfu Industrial And Mining Accessories Co., Ltd.

Dome Plate

Dome plate was designed to offer a high load bearing capacity typically used
with Split Set Bolt, Solid Bolt, Strata Bolt and Cable Bolt etc. It's dome profile
could create an instant fixing force to the bolt and it's flange supporting on the
rock surface getting a stable and safety support in ground support application

Strata Plate

Strata Plate is a light weight support plate with large surface area, which usually
used as an intermediate plate to increase the surface coverage of the bolt. It is
also widely used in the ground support application.

Combi Plate

Combi Plate is a kind of combination plate for use with Split Set Bolt (Friction
Bolt Stabilizer) to have a larger area to support the rock, and make the split set
system has a better support performance. It is also used for fixing and bearing
mesh, and with a hanger loop on the top plate, it is also used for hanging the
ventilation or lighting system etc.

Tips For Rock Bolt Plates

1

 

Regular Inspection

Conduct inspections periodically, especially after seismic events, heavy rainfall, or significant changes in load conditions.

2

 

Cleaning

Remove accumulated debris, dirt, or loose rock around the plates, which can obstruct their effectiveness.

3

 

Corrosion Protection

Apply anti-corrosion coatings (e.g., epoxy, galvanized layers) to steel plates, especially in humid or saline environments.

4

 

Tightening and Re-tensioning

Check and retighten bolts regularly to ensure the plates remain properly secured.
If bolts are loosened due to vibration or rock movement, re-tension them to the specified torque.

5

 

Documenting and Reporting

Maintain detailed records of inspections, maintenance activities, and any observed issues.
Report critical issues immediately to structural engineers or site supervisors.

 

 

 

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