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Basic data
| Standard ID | GB 25974.4-2026 (GB25974.4-2026) |
| Description (Translated English) | Powered support for coal mine - Part 4: Specification for electro-hydraulic control system |
| Sector / Industry | National Standard |
| Classification of Chinese Standard | D97 |
| Classification of International Standard | 73.100 |
| Word Count Estimation | 30,380 |
| Date of Issue | 2026-02-27 |
| Date of Implementation | 2027-03-01 |
| Issuing agency(ies) | State Administration for Market Regulation, Standardization Administration of China |
GB 25974.4-2026: Powered support for coal mine - Part 4: Specification for electro-hydraulic control system
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 73.100
CCSD97
National Standards of the People's Republic of China
Hydraulic supports for coal mines
Part 4.Technical Specifications of Electro-hydraulic Control System
Published on 2026-02-27
Implemented on 2027-03-01
State Administration for Market Regulation
The State Administration for Standardization issued a statement.
Table of contents
Preface III
Introduction IV
1.Scope 1
2 Normative References 1
3.Terms and Definitions 1
4 Requirements 3
4.1 General Requirements 3
4.2 Environmental Conditions
4.3 Power Supply 4
4.4 System Functional Requirements
4.5 Main Technical Specifications 5
4.6 Power fluctuation adaptability 6
4.7 Operational stability 6
4.8 Immunity Requirements 6
4.9 Explosion-proof performance 6
5.Test Methods 6.
5.1 Test Conditions 6
5.2 Test System 7
5.3 System Functional Test 8
5.4 Key Technical Indicators Test 11
5.5 Power fluctuation adaptability test 17
5.6 Operational stability test 17
5.7 Immunity Test 17
5.8 Explosion-proof performance test 18
6.Inspection Rule 18
6.1 Inspection Classification 18
6.2 Inspection Item 18
6.3 Factory Inspection 19
6.4 Type Testing 19
7.Marking, Packaging, Transport and Storage 19
7.1 Mark 19
7.2 Packaging 20
7.3 Transportation 20
7.4 Store for 20 days
8.Use and Maintenance 20
Appendix A (Informative) System Components 21
Appendix B (Normative) Use and Maintenance 22
B.1 General Requirements 22
B.2 Using Operation 22
B.3 Maintenance and Repair 22
Foreword
This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents".
Drafting.
This document is Part 4 of GB (GB/T) 25974 "Hydraulic Supports for Coal Mines". GB (GB/T) 25974 has the following publications.
part.
---Part 1.General Technical Requirements;
---Part 2.Technical requirements for the support column and jacks;
---Part 3.Hydraulic Control System and Valves;
---Part 4.Technical conditions for electro-hydraulic control systems.
Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.
This document was proposed and is under the jurisdiction of the National Mine Safety Administration.
Introduction
Hydraulic supports are crucial equipment for ensuring safe production in coal mines, and electro-hydraulic control systems are used to control the movement of these supports. This document is widely used...
Based on the consultation and compilation of guidance from domestic experts, and combined with my country's coal mine hydraulic support electro-hydraulic control system and coal mine automation technology,
This document, which summarizes the current development status, testing methods, coal mine safety management, safety certification, and product applications, outlines suitable electro-hydraulic control systems for underground hydraulic supports in coal mines.
The basic requirements, performance indicators, and test methods of the control system.
With the rapid development of domestic hydraulic support control technology, and the increasing demands for automation, intelligence, and safety in electro-hydraulic control systems...
With the continuous improvement of technology, there is an urgent need to formulate relevant standards for electro-hydraulic control systems of hydraulic supports in my country, so as to promote domestic and international industry exchanges and progress. This article
The components meet the basic requirements of the electro-hydraulic control system for hydraulic supports in coal mines, including the mandatory requirements that the system and equipment should meet, and also meet the practical requirements.
Sexual demands.
GB (GB/T)25974 "Hydraulic Supports for Coal Mines" is proposed to consist of 4 parts.
---Part 1.General Technical Requirements. The purpose is to establish the basic framework for the entire standards system, covering appearance quality, operational performance,
General requirements such as sealing performance and structural strength.
---Part 2.Technical Requirements for Columns and Jacks. The purpose is to specify the load-bearing reliability and operational stability of the hydraulic support actuator.
Qualitatively define the requirements, test methods, and inspection rules for hydraulic support columns and jacks.
---Part 3.Hydraulic Control Systems and Valves. The purpose is to specify the requirements, test methods, and inspection procedures for hydraulic control systems and valve components.
Verification rules, etc.
---Part 4.Technical Specifications for Electro-hydraulic Control Systems. The purpose is to specify the requirements and testing procedures for electro-hydraulic control systems used in coal mine hydraulic supports.
Methods and testing rules, etc.
Hydraulic supports for coal mines
Part 4.Technical Specifications of Electro-hydraulic Control System
1 Scope
This document defines the terminology for the electro-hydraulic control system of hydraulic supports in coal mines (hereinafter referred to as "the system"), and specifies the technical requirements and inspection procedures.
Requirements for marking, packaging, transportation and storage, use and maintenance are specified, and corresponding test methods are described.
This document applies to the design, manufacture, transportation, use, and maintenance of electro-hydraulic control systems for hydraulic supports in coal mines.
2 Normative references
The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.
For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.
This document.
GB/T 191 Packaging and Storage Graphic Symbols
GB/T 2828.1-2012 Sampling Procedures for Inspection by Attributes – Part 1.Lot-by-lot Inspection Sampling Indexed by Acceptable Quality Limit (AQL)
plan
GB/T 2887 General Specifications for Computer Venues
GB/T 9813.1-2016 General Specifications for Computers Part 1.Desktop Microcomputers
GB/T 9969 General Rules for Instructions for Use of Industrial Products
GB/T 17626.2 Electromagnetic compatibility testing and measurement techniques - Electrostatic discharge immunity test
GB/T 17626.3 Electromagnetic compatibility testing and measurement techniques – Part 3.Radio frequency electromagnetic field radiated immunity testing
GB/T 17626.4 Electromagnetic compatibility testing and measurement techniques - Electrical fast transient/burst immunity test
GB/T 17626.5 Electromagnetic compatibility testing and measurement techniques - Surge (impulse) immunity test
GB/T 17626.6 Electromagnetic compatibility testing and measurement techniques - Conducted disturbance immunity induced by radio frequency fields
GB/T 17626.8 Electromagnetic compatibility testing and measurement techniques - Power frequency magnetic field immunity test
GB/T 17626.11 Electromagnetic compatibility testing and measurement techniques – Part 11.Testing for input currents less than or equal to 16A per phase
Voltage sag, short interruption and voltage change immunity tests
GB/T 17626.13 Electromagnetic compatibility testing and measurement techniques - Low-frequency impedance of AC power supply ports to harmonics, interharmonics and mains signals
Detour test
GB/T 25974.3 Hydraulic supports for coal mines – Part 3.Hydraulic control systems and valves
AQ1043 Safety Mark for Mining Products
KA25-2025 Requirements for the Integrity of Underground Mechanical and Electrical Equipment in Coal Mines
MT209 General Technical Requirements for Electrical and Electronic Products Used in Coal Mine Communication, Detection, and Control
MT/T 210-1990 Basic Test Methods for Electrical and Electronic Products Used in Coal Mine Communication, Detection and Control
3 Terms and Definitions
The following terms and definitions apply to this document.
...
