ISO 19426-3:2018

Structures for mine shafts - Part 3: Sinking stages

This document specifies the design loads and the design procedures for the structural design of stages and components of stages. The loads specified in this document are not applicable for the design of stage ropes or sheaves. Rope sizes are determined in accordance with other standards. This document does not cover matters of operational safety, or layout of the sinking stage. This document adopts a limit states design philosophy.

Structures de puits de mine — Partie 3: Plates-formes de fonçage

General Information

• Status: Published
• Publication Date: 03-May-2018
• ICS: 73.020 - Mining and quarrying
• Technical Committee: ISO/TC 82 - Mining
• Drafting Committee: ISO/TC 82/WG 4 - Structures for mine shafts
• Current Stage: 9092 - International Standard to be revised
• Start Date: 15-Sep-2023
• Completion Date: 13-Dec-2025

Overview

ISO 19426-3:2018 - Structures for mine shafts - Part 3: Sinking stages defines the design loads and design procedures for the structural design of sinking stages and their components. The standard adopts a limit states design philosophy and is focused on structural reliability rather than operational safety or stage layout. It explicitly excludes the design of stage ropes and sheaves (rope sizing is covered by other standards).

Key topics and requirements

• Scope and exclusions
  • Applies to structural design of sinking stages and stage components.
  • Does not cover stage ropes/sheaves, operational safety, or stage layout.
• Design philosophy
  • Limit states approach with partial factors and load combinations.
• Materials
  • Requirements and references for structural steel, high‑strength steel, and aluminium alloys (preferred alloy notes included).
• Load types covered
  • Permanent loads (stage self‑weight and fixed equipment).
  • Imposed loads including stage deck loads (uniform and concentrated), jumbo and lashing unit loads, stage jack and skid loads, canopy, kibble guide, temporary supports, blast loads, guard railing loads and special loads.
  • Examples given: uniformly distributed deck load of 3 000 N/m² (or 1 500 N/m² where no concrete build‑up) and concentrated deck load of 5 000 N.
  • Emergency loads (e.g., emergency rope and impact loads).
• Design procedures
  • Definition of design loads, load combinations and load reversal.
  • Guidance on replaceable members, impact energy design of top decks, and deflection limitations.
• Informative annexes
  • Load factors and combinations (Annex A), examples for jumbo and lashing unit loads (Annexes B & C), and stage jack load examples (Annex D).

Applications and users

ISO 19426-3 is intended for professionals involved in mine shaft sinking and structural design:

• Mining and shaft design engineers
• Structural engineers designing sinking stages, decks and support members
• Equipment manufacturers (stage components, decks, jacks)
• Contractors and fabricators responsible for stage construction
• Regulators and certifiers reviewing structural safety and compliance

Typical applications include structural verification of sinking stage decking and framing, selection of member sizes and materials, impact and deflection checks for top decks, and design documentation for tendering and construction.

Related standards

Relevant references and complementary standards cited by ISO 19426-3:2018:

• ISO 19426-1 (Vocabulary)
• ISO 22111 (Bases for design of structures)
• ISO 2394 (General principles on reliability for structures)
• EN standards for steel and aluminium material and design (e.g., EN 10025 series, Eurocode 9 references)

Keywords: ISO 19426-3:2018, sinking stages, mine shafts, design loads, limit states design, stage deck load, structural steel, aluminium alloys, mining shaft design.

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 19426-3
First edition
2018-05
Structures for mine shafts —
Part 3:
Sinking stages
Structures de puits de mine —
Partie 3: Plates-formes de fonçage
Reference number
©
ISO 2018
© ISO 2018
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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Published in Switzerland
ii © ISO 2018 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols . 2
5 Materials . 4
5.1 Steel . 4
5.1.1 Structural steel grades . 4
5.1.2 High strength steel grades . 4
5.2 Aluminium alloys . 4
6 Nominal loads . 4
6.1 Permanent load . 4
6.2 Imposed loads . 5
6.2.1 Stage deck load . 5
6.2.2 Shaft formwork winch load . 5
6.2.3 Kibble cross-head support load . 5
6.2.4 Jumbo unit load . 6
6.2.5 Lashing unit load . 6
6.2.6 Stage jack load . . 6
6.2.7 Stage skid load . 6
6.2.8 Canopy load . 7
6.2.9 Kibble guide load . 7
6.2.10 Temporary stage support load . 7
6.2.11 Blast load . 7
6.2.12 Guard railing load . . 7
6.2.13 Special load . 8
6.3 Emergency load . 8
6.3.1 Emergency rope load . 8
6.3.2 Emergency impact load . . . 8
7 Design procedures . 8
7.1 Design loads . 8
7.2 Design codes . 8
7.3 Load reversal . 8
7.4 Design of replaceable members . 9
7.5 Impact energy design of top deck . 9
7.6 Deflection limitations . 9
Annex A (informative) Load factors and load combinations .10
Annex B (informative) Examples of jumbo unit loads .12
Annex C (informative) Examples of lashing unit loads .15
Annex D (informative) Examples of stage jack loads with lashing .20
Bibliography .24
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
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committee has been established has the right to be represented on that committee. International
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ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/patents).
Any trade name used in this document is information given for the convenience of users and does not
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World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: www .iso .org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 82, Mining.
A list of all parts in the ISO 19426 series can be found on the ISO website.
iv © ISO 2018 – All rights reserved

Introduction
Many mining companies, and many of the engineering companies which provide designs for mines,
operate globally so ISO 19426 was developed in response to a desire for a unified global approach to
the safe and robust design of structures for mine shafts. The characteristics of ore bodies, such as
their depth and shape, vary in different areas so different design approaches have been developed and
proven with use over time in different countries. Bringing these approaches together in ISO 19426 will
facilitate improved safety and operational reliability.
The majority of the material in ISO 19426 deals with the loads to be applied in the design of structures
for mine shafts. Some principles for structural design are given, but for the most part it is assumed
that local standards will be used for the structural design. It is also recognized that typical equipment
varies from country to country, so the clauses in ISO 19426 do not specify application of the principles
to specific equipment. However, in some cases examples demonstrating the application of the principles
to specific equipment are provided in informative Annexes.
INTERNATIONAL STANDARD ISO 19426-3:2018(E)
Structures for mine shafts —
Part 3:
Sinking stages
1 Scope
This document specifies the design loads and the design procedures for the structural design of stages
and components of stages.
The loads specified in this document are not applicable for the design of stage ropes or sheaves. Rope
sizes are determined in accordance with other standards.
This document does not cover matters of operational safety, or layout of the sinking stage.
This document adopts a limit states design philosophy.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 10721-1, Steel structures — Part 1: Materials and design
ISO 10721-2, Steel structures — Part 2: Fabrication and erection
ISO 19426-1, Structures for mine shafts — Part 1: Vocabulary
ISO 22111, Bases for design of structures — General requirements
ISO 2394, General principles on reliability for structures
EN 1999-1-1, Eurocode 9 — Part 1: Design of aluminium structures — Part 1: General structural rules
EN 1999-1-3, Eurocode 9 — Part 1: Design of aluminium structures — Part 3: Structures susceptible to fatigue
EN 1999-1-4, Eurocode 9 — Par 1: Design of aluminium structures — Part 4: Cold-formed structural
sheeting
CEN/TS 13001-3-1, Cranes — General design — Part 3-1: Limit states and proof competence of steel
structures
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 19426-1 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at http: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org
4 Symbols
C lashing unit grab capacity (m )
E emergency load, or load effect (N, Nm)
e stage load eccentricity factor
G
E emergency impact load (N)
a
E emergency impact load on a protective platform (N)
p
E emergency rope load (N)
R
F design load, or load effect (N, Nm)
G permanent load, or load effect (N, Nm)
G jumbo unit self-weight (N)
D
G lashing unit self-weight (N)
L
K weight of the kibble and full load (N)
L span of an element or floor beam (m)
L lashing unit lever arm or the VSM lashing unit grab lever arm (m)
L stage jack lever arm horizontal (m)
L stage jack lever arm vertical (m)
jumbo unit centre of gravity lever arm or the VSM lashing unit centre of gravity
L
lever arm (m)
L hydraulic cylinder horizontal lever arm to the boom pivot point (m)
5i
L hydraulic cylinder vertical lever arm to the boom pivot point (m)
6i
M jumbo unit moment about the boom pivot point (Nm)
D
M lashing unit moment about the boom pivot point (Nm)
L
N total number of lashing unit cycles
L
P payload used during doubling-down (N)
p uniformly distributed load on stage decks (N/m )
D
P canopy load (N)
A
P blast load (N)
B
P concentrated load on stage decks (N)
C
P total uniformly distributed imposed load on stage decks (N)
D
P stage skid load (N)
G
P kibble cross-head support load (N)
H
2 © ISO 2018 – All rights reserved

P stage jack load (N)
J
P stage jack axial load (N)
JA
P stage jack transverse load (N)
JT
P kibble guide load (N)
K
P jumbo unit horizontal load (N)
DH
P jumbo unit vertical load (N)
DV
P horizontal lashing unit load (N)
LH
P vertical lashing unit load (N)
LV
P special load (N)
P
P hand railing load (N/m)
R
P temporary stage support load (N)
T
P winch load (N)
W
Q predominant imposed load, or load effect (N, Nm)
Q to Q additional independent imposed loads, or load effects (N, Nm)
3 n
V predominant imposed load, or load effect (N, Nm)
E
W weight of the kibble cross-head (N)
C
W horizontal hydraulic cylinder loads at maximum capacity (N)
CHi
W vertical hydraulic cylinder load (N)
CVi
W weight of the cactus grab including the grab crosshead (N)
G
W weight of rock in the lashing unit grab (N)
PL
W jumbo drilling load (N)
DL
W weight of kibble and full load (N)
K
W rated shutter winch load (N)
R
W weight of the shutter (N)
S
W grab winch safe working load (N)
W
α bellmouth impact factor
B
α impact factor for kibble cross-head support
C
α jumbo unit impact factor
D
α impact factor for emergency rope load
E
α hydraulic cylinder impact factor
H
α kibble guide impact factor
K
α lashing unit impact factor
L
α impact factor for stage jack load
J
α winch rated load impact factor
R
α formwork weight impact factor
S
α stage support impact factor
T
η efficiency factor
γ partial load factor for emergency load
e
γ partial load factor for permanent load
fo
γ partial load factor for the predominant imposed load
f1
γ to γ partial load factors for imposed load
f2 fn
Ψ to Ψ load combination factors
2 n
5 Materials
5.1 Steel
5.1.1 Structural steel grades
The materials used for structural steel members should comply with the requirements of EN 10025-1
and EN 10025-2.
5.1.2 High strength steel grades
The materials for high strength steel members should conform to the requirements of EN 10025-6,
EN 10149-1, EN 10149-2, or EN 10149-3.
5.2 Aluminium alloys
The materials used for aluminium alloy members should conform to the requirements of EN 573-3, EN
485-1 to EN 485-4 and EN 755-1 to EN 755-9.
NOTE The preferred alloys include 5083 H32 for 4 mm, 6 mm and 8 mm thick plates or 6082 T651 or 6061
T651 for 10 mm, 12 mm and 15 mm thick plates and 6061 T6 or 6082 T6 for extrusions.
6 Nominal loads
6.1 Permanent load
The permanent load, G, shall be as given in ISO 22111 and shall include the stage and all permanent
fixtures and equipment necessary for the sinking and lining of the shaft.
4 © ISO 2018 – All rights reserved

6.2 Imposed loads
6.2.1 Stage deck load
The imposed load, P or P , on stage decks shall be the most adverse of the following:
D C
a) a uniformly distributed load, P , of 3 000 N/m , which shall be taken to include concrete build-up
D
loads, unless it can be demonstrated that there will be no build-up of concrete in which case take
a uniformly distributed load, P , of 1 500 N/m . P is the total uniformly distributed load on stage
D D
decks which shall be calculated from the uniformly distributed load multiplied by the entire stage
deck area; or
b) a concentrated load, P , of 5 000 N, placed in the position that produces the most severe effects in
C
the member under consideration.
No area reduction factors shall be included when deck loads from one or more decks are being combined.
Due allowance shall be made for possible eccentric application of stage deck loads. Unless it can be
shown that procedures are in place to ensure concentric placement of all deck loads, it shall be assumed
that one half of each stage deck carries a load of 0,75 P , whilst the other half of the deck carries a load
D
of 0,25 P .
D
6.2.2 Shaft formwork winch load
The shaft formwork winch load, P (N), shall be the greater of:
W
P = α W , and (1)
W S S
P = α W (2)
W R R
where
W is the weight of the shaft formwork (N);
S
W is the rated shaft formwork winch load (N);
R
α is the formwork weight impact factor, which may be taken as 2,0;
S
α is the winch rated load impact factor, which may be taken as 1,5.
R
The shaft formwork winch load shall be appropriately distributed between the winches assuming that
any one winch can fail.
6.2.3 Kibble cross-head support load
The kibble cross-head support load, P (N), shall be obtained from the following:
H
P = α W (3)
H C C
where
α is the impact factor for the kibble cross-head support, which if no better information is availa-
C
ble may be taken as 2,0;
W is the weight of the kibble cross-head (N).
C
6.2.4 Jumbo unit load
The jumbo unit loads, P , P and M , shall be the greater of:
DH DV D
a) operating loads determined from the geometry and operation of the jumbo unit. The most critical
position of the boom shall be considered, and an impact factor of not less than 3,0 shall be applied;
b) maximum equipment loads determined from the geometry and maximum capacity of the jumbo
unit equipment. An impact factor of not less than 1,5 shall be applied.
Examples are provided in Annex B.
6.2.5 Lashing unit load
The lashing unit loads, P , P and M , shall be the greater of:
LH
...