Yielding & Rigid Mine Arches
TH steel profiles are used in tunnels and roadways and provide a yielding, high resistance support as well as:
Steel Mine Arches Tunneling
- High carrying capacity
- Higher resistance against all kinds of stresses
- Easy and fast assembly
- Custom design to fit the excavated tunnel thereby maximising available space
- Reusability
- Long working life.
As underground mines get ever deeper in search of supplementary orebodies, bearing forces become a significant issue in tunnel stabilization. Existing tunnel support methods become less effective at greater depth, and the need for additional reinforcement increases.
With some of the deepest mines reaching four kilometres underground, global trends suggest.
Incidents of rock bursts and tunnel failure are on the rise. The deeper the mine, the higher the stress level exerted on the surrounding rock. Heavier section profiles and optimising excavation shapes to endure higher stresses are developed for extremely difficult underground conditions.
Our qualified technical team are available for any information or advice concerning your unique project requirements.
Standard Mine Arches
ABE-RS-D – TYPE: RING SET OR SHAFT RINGS
ABE-MP-3WH – TYPE: MIDDLE POINT
ABE-SQ-3WH – TYPE: SQUARE SHORT RADIUS
Mining Support Accessories
BOLTED JOINTS
BOLTED JOINTS
BOLTED JOINTS
BOLTED JOINTS
YOKE JOINTS
YOKE JOINTS
G405 CLAMPS – C/W HT Bolts Grade 8.8 & Nuts Grade 8 M24
FASTENERS – S2475JR U Bolts and Class 5.6 Nuts available in M20
CHANNEL SPACER SPECIAL DESIGN
CHANNEL SPACE – UPN
BASE PLATES
BASE PLATES – THN-29
BASE PLATES – THN-21
BASE PLATES – THN-16,5
Bernold Sheets & Lagging
Bernold Sheets are grooved, undulated and bent to a certain radius, manufactured in sizes up to 2/3mm and 1080x1200mm long.
They act as a concrete framework when totally cured.
Sheets are assembled over the steel arches, overlapped and hooked up with pins. Each sheet will cover approximately 1m2.
Ribs provided within the sheets every 120mm are considered equivalent to a concrete framework structure.
The Bernold System provides more security, efficiency and is economical.
| Specifications | Value |
|---|---|
| Wide | 1190mm |
| Length Before Rolled | 1225mm |
| Length After Rolled | 1080mm |
| Number of Waves | 9 |
| Thickness | 2mm +/- 2 |
| Weight | 21 kg/ud2 |
Lagging
Techniques learned about shaping steel for strength, performance, and value in the world’s tunnels and shafts can be applied to the benefit for each project.
