Support Profiles and Rock Bolt Straps

2

Introduction .................................................................................................................. 3

Fields of Application ...................................................................................................... 4

Main Advantages ........................................................................................................... 4

System Description ...................................................................................................... 4

Specifications. .............................................................................................................. 5

Accessories .................................................................................................................. 6

TH Profiles, HEB Profiles, and UNP Profiles are successfully used as passive ground control elements in underground construction.

Although the importance of conventional steel support has recently decreased, it is still successfully used in deep-level underground coal mining as well as for special supporting constructions in Tunneling and cavern construction.

Rock bolt straps and mats are used in combination with rock bolts for securing the excavation surface. In hard rock Mining, rock bolt straps are preferably used, whereas soft rock and coal Mining prefer flexible rock bolt mats or mesh.

Contents

Introduction

3

■ Ground support in Underground Mining

■ Shaft construction support

■ Support of junctions and cross-sections

■ Rock bolt mats and straps for connecting individual rock bolts

■ Flexible adaptation of the beam geometry to the respective excavated cross-section

■ Well-proven passive mine support

■ Flexible extension by using yielding locks

■ Large-scale profile cross-sections ensure longer life times

■ Mine support steel 31Mn4 according to DIN 21544

■ Bent to the corresponding profile ■ Single overlapping segments are usually connected by two locks

■ Alternative TH locks are available on request

■ I Profile – HEB broad flange girder ■ Primary material S235JRG2 or S355J2G3 according to EN 10025-2

■ Bent to the corresponding profile ■ Connection of the segments via head plates that are available in different designs

■ Alternative connection of the abutting segments via laces

■ Different lace types and lace screws are available on request

■ U Profile with inclined inner surfaces of the flanges

■ Primary material S235JRG2 or S355J2G3 according to EN 10025-2

■ Bent to the corresponding profile ■ Connection of the segments via welded-on and screwed head plates or flange connections

■ Different lace types and lace screws are available on request

■ Connection of single bolts

Fields of Application

System Description

Main Advantages

TH Profile

HEB Profile

UNP Profile

Rock Bolt Straps

4

Support Profiles

TH Profile

HEB Profile

UNP Profile

Specifications

Type/characteristic value Symbol Unit TH 21 TH 25 TH 29 TH 36

Weight m [kg/m] 21 25 29 36Profile height H [mm] 108 118 124 138Profile width B [mm] 124 135 151 171Neutral axis e [mm] 52 58 58 69

Section modulus Wx [cm³] 61 80 94 136

Type/characteristic value Symbol Unit UNP 80 UNP 100 UNP 120 UNP 140 UNP 160

Weight m [kg/m] 8.9 10.9 13.7 16.4 19.3Profile height H [mm] 80 100 120 140 160Profile width B [mm] 45 50 55 60 65Neutral axis e [cm] 1.45 1.55 1.60 1.75 1.84

Section modulus Wy [cm³] 6.4 8.5 11.1 14.8 18.3

Type/characteristic value Symbol Unit HEB 100 HEB 120 HEB 140

Weight m [kg/m] 20.9 27.4 34.5Profile height H [mm] 100 120 140Profile width B [mm] 100 120 140

Section modulus Wx [cm³] 89.9 144 216

5

■ Alternative profile types and connection elements are available on request

■ Screws, nuts, and bolts are available in different designs

■ Rock bolt tension straps and underpinnings

■ GRP mesh and rock bolt straps

Accessories

Specifications

Rock Bolt Straps

OSRO straps 1)

W-straps 1)

Length

[mm]

Width

[mm]

Horizontal bar diameter

[mm]

Strapping bar diameter

[mm]1,000 - 6,000 250 - 1,000 6 - 10 5.5

Length[mm]

Width[mm]

Wall thickness[mm]

Hole spacing[mm]

1,000 - 3,.000 220 - 500 1.5 - 6.0 500

1) Alternative dimensions available on request

6

7

043

49-1

/02.

13-w

eb h

e

Please note: This brochure serves basic information purposes only. Technical data and information provided herein shall be considered non-binding and may be subject to change without notice. We do not assume any liabilityfor losses or damages attributed to the use of this technical data and any improper use of our products. Should you require further information on particular products, please do not hesitate to contact us.

"ALWAG" (AM 952/79), "AT" (AM 6138/2003), "AT-SYSTEM” (AM 6139/2003), "DYWI®" (4197869), "LSC" (AM 4326/2008), "OMEGA-BOLT®" (3258282), "POWER SET" (AM 6163/2002), and "TUBESPILE" (AM 4328/2008) are registered trademarks of DYWIDAG-Systems International GmbH."Combi Coat®" and "CT-Bolt" are trademarks of Vik Ørsta AS.DYWIDAG-Systems International GmbH is a partner of Vik Ørsta AS.

DSI AustriaDYWIDAG-Systems International GmbHAlfred-Wagner-Strasse 14061 Pasching/Linz, AustriaPhone +43-7229-610 49 0Fax +43-7229-610 49 80 E-mail alwag@dywidag-systems.atwww.alwag.com

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