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AS 19426.7:2024
[Current]Structures for mine shafts, Part 7: Rope guides (ISO 19426-7:2021, MOD)
AS 19426.7:2024 identically adopts and modifies ISO 19426 7:2021, which specifies the design loads and design procedures for the design of rope guides and rubbing ropes used for guiding conveyances and preventing collisions in vertical mine shafts for permanent operations
Published: 28/03/2024
Pages: 55
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
Preface
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Materials
6 Disturbing actions
6.1 Coriolis force
6.2 Aerodynamic loads
6.2.1 Steady state
6.2.2 Buffeting
6.2.2.1 Buffeting force when two conveyances pass each other
6.2.2.2 Buffeting in the wake of a leading conveyance
6.2.2.3 Buffeting force when conveyance passes inflow or outflow of air
6.2.3 Air density
6.3 Rope torque
6.3.1 Head rope torque
6.3.2 Tail rope torque
6.3.3 Torque applied by multiple ropes
6.4 Eccentric conveyance loading
6.5 Winder emergency braking
6.6 Thermal actions on headframe
6.7 Wind load on conveyances
7 Restoring forces
7.1 Rope guide tension
7.2 Rope guide stiffness
7.2.1 Stiffness of rope guides
7.2.2 Stiffness of head and tail ropes
8 Conveyance trajectory
8.1 Simulation of conveyance behaviour
8.2 Combination of actions
9 Design procedure
9.1 Function of rope guides
9.2 Risk assessment
9.3 General design procedure
9.4 Simple design procedure
9.4.1 Limits on parameters
9.4.2 Design requirements
9.5 Comprehensive design procedure
10 Minimum clearances
10.1 Design clearances
10.2 Dynamic displacement envelope
10.3 Reduced dynamic clearances
10.4 Use of rubbing ropes
11 Construction and installation tolerances
11.1 Shaft vertical cylinder diameter
11.2 Tolerance of associated structures
11.3 Tolerance on rope guide tension
11.4 Commissioning
11.4.1 Commissioning procedure
11.4.2 Components of the commissioning procedure
12 Other design considerations
12.1 General
12.2 Loading and unloading of conveyances
12.3 Accessing intermediate levels
12.4 Number of rope guides
12.5 Rope guide positions
12.6 Rope guide construction
12.7 Rope guide tension and factor of safety
12.8 Rope guide attachments
12.9 Shafts with more than one winder
12.10 Design life
12.11 Rope guide tensioning
12.11.1 Gravity tensioning devices
12.11.2 Hydraulic tensioning devices
13 Assessment of existing installations
13.1 General
13.2 Application of measurements
13.3 Upgrades or modifications
14 Inspection and maintenance
14.1 Deterioration mechanisms
14.1.1 General
14.1.2 Wear
14.1.3 Corrosion
14.1.4 Mechanical damage
14.1.5 Broken wires
14.2 Inspections
14.2.1 General
14.2.2 Inspection intervals
14.2.3 Visual inspection
14.2.4 Non-destructive inspection
14.3 Maintenance actions
14.3.1 Maintenance intervals
14.3.2 Lubrication
14.3.3 Rope turning and rope lifting
14.3.4 Equalisation of hoist rope tensions
14.4 Rope guide discard criteria
14.5 Rope guide attachments
Annex A
A.1 General
A.2 Operating combinations
A.3 Displacement multipliers
Annex B
B.1 Calibration
B.2 Scope and use of Annexes B to F
B.3 Basic shaft parameters
B.3.1 Nominal shaft geometry
B.3.2 Airflow characteristics
B.3.3 Shaft wall misalignments
B.4 Basic rope parameters
B.4.1 Head and tail rope parameters
B.4.2 Rope guide and rubbing rope parameters
B.4.3 Rope guide and fixed guide installation accuracy
B.5 Basic winder and conveyance parameters
B.5.1 General parameters
B.5.2 Cage and counterweight parameters
B.5.3 Skip parameters
Annex C
C.1 General
C.2 Steady state lateral coefficient CLX and CLZ
C.3 Buffeting
C.3.1 General
C.3.2 Buffeting force when two conveyances pass each other
C.3.3 Conveyance passing inflow or outflow of air
Annex D
D.1 Rope torque
Annex E
E.1 Determination of rope guide stiffness
E.2 System natural frequencies
E.3 Preliminary determination of rope guide tension
E.4 Influence of temperature
Annex F
F.1 Approximate maximum conveyance displacements
F.1.1 Displacement due to Coriolis force DC
F.1.2 Displacement due to steady state aerodynamic force DA
F.1.3 Yaw rotation and displacement from head and tail rope torsion
F.1.4 Displacements due to buffeting forces DB
F.2 Other disturbing actions
F.2.1 Initial rope guide motion or external displacement
F.2.2 Conveyance tilt due to eccentric loading
Bibliography
Appendix ZZ
ZZ.1 Scope
ZZ.2 Modifications
Cited references in this standard
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