Overview
ISO 19426-5:2018 - Structures for mine shafts - Part 5: Shaft system structures specifies the loads, load combinations and design procedures for shaft system structures in both vertical and decline shafts. The standard covers structural elements such as buntons, guides and rails, station structures, rock loading structures, brattice walls, conveyance and vehicle arresting structures and dropsets, services supports, rope guide anchor supports and box fronts. It adopts a limit states design philosophy. Rock support, operational safety and shaft layout are explicitly excluded.
Keywords: ISO 19426-5, shaft system structures, mine shaft design, limit states design, mine engineering.
Key topics and technical requirements
- Scope of structural elements: Defines the shaft system components to be designed (guides, rails, station structures, protective platforms, brattice walls, arresting devices, etc.).
- Loads and load combinations: Nominal loads are grouped as permanent, imposed (operational), emergency and seismic - including conveyance drop test loads and earthquake actions.
- Design procedures: Guidance on applying limit states design, selection of design loads, and referencing relevant structural codes for detailed structural analysis.
- Special requirements: Provisions for shaft steelwork in designated shaft zones (A–D), and rules for emergency arresting structures and stopping device supports.
- Additional limit states and effects: Lateral displacement of conveyances, fatigue, rebound velocity ratio, amplification of loads, and strain loading.
- Durability and construction: Provision for wear, corrosion, protective platforms, construction tolerances and fabrication/construction requirements.
- Annexes: Normative and informative annexes include shaft zone classification, shaft condition classification, load factors/load combinations and guidance on protective platforms.
Keywords: loads, load combinations, emergency arresting, protective platforms, fatigue, corrosion, construction tolerances.
Practical applications and users
ISO 19426-5 is intended for use by:
- Mining engineers and shaft designers developing structural layouts for vertical and decline shafts.
- Structural engineers responsible for designing shaft steelwork, guide systems and arresting devices.
- Contractors and fabricators building shaft system structures who need construction tolerances and durability guidance.
- Regulators and asset owners seeking a harmonized, international basis for shaft structural safety and reliability.
Typical applications include design and verification of guide rails and bunton systems, station footwall structures, dropsets and conveyance arresting supports, and specification of loads for protective platform design.
Keywords: mine shaft structures, shaft design standard, guide rails, buntons, arresting structures.
Related standards
Using ISO 19426-5 helps align mine shaft structural design with international best practice for loads, limit states and durability.
