GB 25974.1-2026 Powered support for coal mine—Part 1: General technical specification English, Anglais, Englisch, Inglés, えいご
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ICS
CCS
National Standard of the People's Republic of China
GB/T 25974.1-2026
Powered support for coal mine - Part 1: General technical specification
煤矿用液压支架 第1部分：通用技术条件
Issue date: 2026-02-27 Implementation date: 2027-03-01
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Foreword
1 Scope
2 Normative References
3 Terms and Definitions
4 Requirements
4.1 General Requirements
4.2 Appearance Quality
4.3 Operational Performance
4.4 Sealing Performance
4.5 Support Performance
4.6 Adaptability Performance
4.7 Yield Performance
4.8 Structural Strength
4.9 Durability Performance
4.10 Hydraulic Components
4.11 Materials
4.12 Welding
5 Test Methods
5.1 Test Conditions
5.2 Lifting Points
5.3 Appearance Quality
5.4 Operational Performance
5.5 Sealing Performance
5.6 Support Performance
5.7 Adaptability Performance
5.8 Yield Performance
5.9 Structural Strength
5.10 Durability Performance
5.11 Hydraulic System and Support Integration
5.12 Materials
6 Inspection Rules
6.1 Classification of Inspections
Powered Support for Coal Mine Part 1: General Technical Conditions
1 Scope
This document defines the terms for powered support for coal mines, specifies its requirements, marking, packaging, transport, storage, and use and maintenance. It establishes inspection rules and describes corresponding test methods.
This document applies to the research and development, design, production, and testing of powered support for coal mines (hereinafter referred to as support).
2 Normative References
The following documents contain provisions which, through normative reference in this text, constitute essential provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 228.1—2021 Metallic materials — Tensile testing — Part 1: Method of test at room temperature
GB/T 229—2020 Metallic materials — Charpy pendulum impact test method
GB/T 3836.1—2021 Explosive atmospheres — Part 1: Equipment — General requirements
GB/T 9969 General principles for preparation of instructions for use of industrial products
GB/T 11352 Carbon steel castings for general engineering use
GB/T 12361 General technical requirements for steel die forgings
GB/T 12467 (all parts) Quality requirements for fusion welding of metallic materials
GB/T 13264—2008 Sampling procedures and tables for small-lot inspection by attributes for percent nonconforming items
GB/T 25974.2—2010 Powered support for coal mine — Part 2: Specification for prop and jack
GB/T 25974.3—2010 Powered support for coal mine — Part 3: Hydraulic control system and valves
MT/T 76 Emulsifying oil, concentrate and high water content hydraulic fluid for powered support
MT/T 98 Inspection specification for hose and hose assembly for hydraulic powered support
MT/T 1273—2025 Technical requirements for manufacturing of structural components of powered support
MT/T 986 U-shaped pin quick coupling and accessory for mining
3 Terms and Definitions
For the purposes of this document, the following terms and definitions apply.
3.1 powered support
Equipment that uses hydraulic power to achieve movement such as lifting and advancing, for roof support.
3.2 2-leg shield powered support
A powered support that is supported by two legs between the canopy and the base and has a caving shield.
3.3
4-leg shield powered support
A powered support that is supported by four legs between the canopy and the base and has a caving shield.
3.4
check support
A powered support that is supported by legs between the canopy and the base without a caving shield.
3.5
powered support in A class
Powered supports designed for working faces with an annual output of over 5 million tons or those required by users for high reliability design.
3.6
powered support in B class
Powered supports other than Class A.
3.7
basic shield support
General hydraulic supports used in the middle part of the coal mining face.
3.8
support components
The main components of the support that bear and transmit roof pressure.
NOTE: Includes the canopy, caving shield, linkages or legs, and base.
3.9
canopy
The component of the support that is in direct contact with the roof and transmits the supporting force.
NOTE: A single or combined component.
3.10
base
The component of the support that is in direct contact with the floor and transmits the supporting force of the support to the floor.
NOTE: A single or combined component.
3.11
goaf shield
The component of the support that directly connects the canopy and the base (or through linkages) to transmit the support load and the pressure from the caved roof rock, and shields the working face from the goaf.
3.12
linkage
A component that connects the goaf shield and the base to form a four-bar linkage.
3.13
support accessories
Components that do not bear the supporting force of the support but are necessary to ensure the support's functionality.
3.14
advancing mechanism
The device that is hinged at the front end of the support canopy and is used to support the coal wall, preventing debris and coal from falling into the working face area at the front of the support.
