Post on 16-Feb-2022
TECCO® meshThe most economical dynamic surface support
High-tensile mesh with
chain-link structure for
underground applications
in rockburst conditions
– quick & easy to install.
2
2 kJ
TECCO® meshMade to withstand highest loads
TECCO® mesh as surface support in highly stressed rockburst
conditions or squeezing ground. Offers both an effi cient
installation and reliable protection with the most competitive
cost-performance ratio.
Dynamic energy capacity
Displacement [mm]
Loa
d [k
N]
2 kJ4 kJ
12 kJ
Results of quasi-static tests made by the Western
Australian School of Mines (WASM): TECCO® mesh with
a wire tensile strength of 1770 N/mm2 can carry much
higher static and dynamic loads than traditional
reinforcement nets (graph based on WASM results).
Fibrecrete 60 mm synt. fi bre, on 1.25 m x 1.25 m
Fibrecrete 110 mm steel fi bre and embedded weld mesh,on 1.25 m x 1.25 m
Fibrecrete 80 mm synt. fi bre, on 1.25 m x 1.25 m
Geobrugg
MINAX® M85/2.7
Geobrugg
TECCO® G80/4
Welded mesh 5.6 x 100 x 100
For high load capacity: Both static and
dynamic capacities (e.g. while blasting) are
higher compared to other surface support
Rhomboidal chain-link structure
For easy handling and storing: Manual and
mechanized installation by unrolling with any
mechanized technology.
Low weight
For fast installation: Very light relative to its
strength due to the high-tensile wire. This
makes manual or mechanical installation very
easy and improves the occupational health
and safety.
Knotted ends
For maximum stability at the edges: Profit
from minimized overlapping, optimized
number of rock bolts and no sharp edges.
Balanced stiffness
For perfect tunnel protection: Mesh flexibility
permits good surface contact and optimal mesh
tightening. Minimal deformations after rock-
burst events or blasting work.
3
Adapted from:
V. Louchnikov, S. Brown and R. Bucher, 2014.
Mechanized installation of high-tensile chain-link
mesh in underground operations.
Original article available on request.
Less overlap, increased bolt spacing, greater savings
Knotted ends at the edges of the mesh allow minimized overlapping on the rock surface. This leads to a
highly effective installation saving both mesh and time.
$(AUD)/kJ per m2 of surface support; per 3 m development cut
Total installation costs (AUD) for 1 kJ energy capacity
Corrosion protection
TECCO® mesh standard coating is SUPERCOATING®
(Zn/Al). For special conditions ULTRACOATING® is
provided to ensure longer working life.
Salt spray test
according DIN 50021-SS/ASTM B117/
EN ISO 9227
Expo
sure
in h
ours
unti
l th
e oc
curr
ence
of 5
% d
ark-
brow
n ru
st
GEOBRUGG ULTRACOATING®
GEOBRUGG SUPERCOATING®, alu-zinc
Hot-dip galvanized
• 20 % less mesh• Fewer bolts needed
3 m
11 m
1.5 m
1.5 m
TECCO® meshCross-section
example
• 4 sheets overlap• 7 more bolts used
Welded mesh
1.5 m
3 m
1.2 m
11 m
0
500
1000
600-1000 %longer
200-300 %longer
1500
2000
2500
3000
3500
3 m
3 m
[h]
Welded Mesh
Strap Mesh
Fibre Reinforced Shotcrete 80 mm
Fibre Reinforced Shotcrete +
Welded Mesh
MINAX® M85/2.7
High Energy Absorpti on Mesh
Mesh Reinforced Fibrecrete 110 mm
TECCO® G80/4
$ 0
$ 85
$ 74
$ 58
$ 57
$ 51
$ 51
$ 35
$ 19
$ 10 $ 20 $ 30 $ 40 $ 50 $ 60 $ 70 $ 80 $ 90
11 m
fi bre, on 1.25 m x 1.25 m
Fibrecrete 110 mm steel fi bre and embedded weld mesh,on 1.25 m x 1.25 m
fi bre, on 1.25 m x 1.25 m
A company of the BRUGG Group
ISO 9001 certifi ed
Geobrugg AG
Geohazard Solutions
Aachstrasse 11 • CH-8590 Romanshorn
Tel. +41 71 466 81 55 • Fax +41 71 466 81 50
www.geobrugg.com • info@geobrugg.com
5.1
05.0
3.E
N-C
H.1
503
At-a-glance Specifi cations and options of TECCO® mesh
Small deviations from mesh geometry and other modifications are subject to change without notice.
Technical Data
TECCO® G80/4
Mesh shape rhomboid
Mesh width 80 mm (+/- 3 %)
Diagonal 102 x 177 mm (+/- 3 %)
No. of meshes transversal 9.8 pcs/m
No. of meshes longitudinal 5.6 pcs/m
Steel wire
Wire diameter 4 mm
Total height of mesh three-dimensional 15 mm (+/- 1 mm)
Tensile strength of steel min. 1770 N/mm2
Material high-tensile steel wire
Tensile strength of a wire 22 kN
Load capacity
Punching load 300 x 300 mm plate 105 kN (according to WASM tests)
Tensile strength of mesh longitudinal 190 kN/m
Mesh rolls
Mesh edges mesh ends knotted
Roll width 1.5 m - 3.9 m
Roll length as per site requirement
Total surface per roll various
Weight per m2 2.6 kg/m2
Weight per mesh roll various
Corrosion protection
Composition GEOBRUGG SUPERCOATING® (95% Zn + 5% Al)
Coating weight 150 g/m2
MESHA® installation handler
For a fully mechanized installation of Geobrugg mesh
in one working process. The MESHA® can be retrofit-
ted to any development jumbo or bolting machine,
without losing a boom for drilling.
G-Plate
For optimal load transmission from the rock bolts to the
TECCO® mesh. The special spike plate grabs the mesh
in 6 positions and increases the load capacity, the load
transfer and the blasting resistance.
Optional connection T3 Clip
For a tool-less connection the T3 Clip connects the
mesh when necessary, ensuring 100 % load transfer.