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GB 25974.1-2010 English PDF

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GB 25974.1-2010: Powered support for coal mine -- Part 1: General specification
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Basic data

Standard ID GB 25974.1-2010 (GB25974.1-2010)
Description (Translated English) Powered support for coal mine -- Part 1: General specification
Sector / Industry National Standard
Classification of Chinese Standard D97
Classification of International Standard 73.100
Word Count Estimation 32,327
Date of Issue 2011-01-10
Date of Implementation 2011-06-01
Quoted Standard GB/T 228; GB/T 229; GB 3836.1-2000; GB 9969.1; GB/T 11352; GB/T 12361; GB/T 12467.1; GB/T 12467.2; GB/T 12467.3; GB/T 12467.4; GB/T 12467.5; GB/T 13264-2008; GB/T 13306; GB 25974.2; GB 35974.3; MT 76; MT/T 98; MT/T 587; MT/T 986
Regulation (derived from) Announcement of Newly Approved National Standards No. 1 of 2011 (No. 166 overall)
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary This Chinese standard specifies the coal mine hydraulic support (hereinafter referred to as stents) terms and definitions, requirements, test methods, inspection rules, marking, packaging, transport and storage. This standard applies (0 ~ 60)��C ambient temperature between the use of the stent.

GB 25974.1-2010: Powered support for coal mine -- Part 1: General specification

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Powered support for coal mine.Part 1. General specification ICS 73.100 D97 National Standards of People's Republic of China Coal mine hydraulic support Part 1. General requirements Part 1. Generalspecification Published 2011-01-10 2011-06-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China issued

Table of Contents

Introduction Ⅲ Introduction Ⅳ 1 Scope 1 2 Normative References 1 Terms and definitions 1 3 Requirement 3 4 4.1 General Requirements 3 4.2 appearance quality 4 4.3 Operating Performance 4 Sealing performance 4 4.4 4.5 Safety Performance 5 4.6 adaptability 5 4.7 Let shrinkage performance 5 Structural strength 5 4.8 4.9 Durability 5 4.10 hydraulic component part 6 4.11 Material 6 Welding 6 4.12 4.13 allowable stress and static force calculation 6 Test Method 5 6 5.1 Test conditions 6 5.2 Lifting point 7 5.3 appearance quality 7 5.4 Operating Performance 7 Sealing performance 5.5 7 5.6 Safety Performance 8 5.7 adaptability 8 Let shrink performance 8 5.8 9 5.9 Strength Durability 16 5.10 5.11 hydraulic systems and integrated bracket 19 Materials 19 5.12 6 Inspection Rules 19 6.1 Inspection Classification 19 6.2 Test item 20 6.3 factory inspection 20 20 6.4 Type inspection 7 signs, packaging, transportation and storage 21 7.1 marks 21 7.2 Packaging, transportation and storage 21 Appendix A (informative) Table 23 hazardous situation Annex B (normative) allowable stress and static force calculation 24 Annex C (informative) Product Manual 25

Foreword

This section 4.3.1,4.4 ~ 4.9 4.6.2,4.8 mandatory and the rest are recommended. GB 25974 "coal mine hydraulic support" is divided into the following four parts. --- Part 1. General requirements; --- Part 2. Jack post and technical conditions; --- Part 3. valve and hydraulic control system; --- Part 4. Technical requirements electro-hydraulic control system. This is Part 1 GB 25974, which corresponds to European standards EN1804-1.2001 "portion of the first hydraulic support security requirements Point. General Requirements "hydraulic support. This portion EN1804-1.2001 non-equivalent degree of coherence, the main differences are as follows. --- increasing the hydraulic support classification (see 3.1); --- increased performance requirements of the entire frame (see 4.3,4.5,4.6); --- increasing the entire frame body structure tested and non-load test content (see 5.4,5.6,5.7,5.10.3); --- increased inspection rules (see Chapter 6). Appendix A of this section, Appendix B, Appendix C is an information appendix. This section is proposed and managed by the China Coal Industry Association. This section is drafted. CCRI mining Design Research Branch. Participated in the drafting of this section. Detection Research Branch Coal Research Institute. The main drafters of this section. Kingdom law, Zhao Zhili, Wang Xiaodong, Song Ji Ying, Fu Jingyu, ginger golden goal, Zhu Jun, Meng two deposit, Du Zhongxiao, Liu Xinke.

Introduction

Hydraulic support is important to ensure mine safety and production equipment, our country since 1984 began MT86-1984 "type hydraulic support Test specification ", in 1992 developed a MT312-1992" hydraulic support General technical conditions ", as amended in 2000 MT312-2000" solution Pressure bracket General technical conditions ", and on May 1, 2001 implementation. The standard amended twice, technical requirements successive increase, thereby promoting Into the development of high-yield and efficient mechanized mining technology of hydraulic support technology advances and coal. After joining the WTO, in order to promote Into international trade and technological exchanges, the development of national standards for coal mine hydraulic support, this standard structure as the foreword. In my present standards State hydraulic support design, testing and use of research-based, and extensive reference to the world's major coal-producing countries and relevant international organizations standard. This section specifies the situation and consider the following. --- a dangerous situation due to the hydraulic support operation that may occur; --- hazardous working conditions and dangerous part of what happens; --- cases cause injuries and damage to health may occur. This is not a predetermined part of the following specific requirements. --- particularly corrosive environments; --- during manufacture, transport and stop using; ---earthquake. Prerequisite time of executing this section. --- Only trained qualified personnel in order to obtain post operation and use of hydraulic support; --- For some component parts have not put forward special requirements, shall meet the following requirements. ● After good machinability; ● defect-free; --- component parts are in good working condition; --- between the manufacturer and user to use hydraulic support full consultation; --- by using proven engineering practices and generally accepted method of calculating design. Coal mine hydraulic support Part 1. General requirements

1 Scope

GB 25974 This section specifies the terms and definitions Mine hydraulic support (hereinafter referred to as stent), requirements, testing methods, testing gage Then, signs, packaging, transportation and storage. This section applies to (0-60) used in the stent between deg.] C ambient temperature.

2 Normative references

Terms of the following documents constitute provisions of this section by reference in this part of GB 25974. For dated reference documents Pieces, all subsequent amendments (excluding corrections) or revisions do not apply to this section, however, encouraged to reach under this section Whether the parties to the agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this section. GB/T 228 materials at ambient temperature tensile test method (GB/T 228-2002, eqvISO 6892.1998) GB/T 229 metal material Charpy pendulum impact test method (GB/T 229-2007, ISO 148-1.2006, MOD) GB 3836.1-2000 explosive gas atmospheres Electrical Equipment Part 1. General Requirements (eqvIEC 60079-0.1998) GB 9969.1 General instructions for use of industrial products GB/T 11352 Carbon steel castings for general engineering (GB/T 11352-2009, ISO 3755.1991; ISO 4990.2003, MOD) GB/T 12361 General technical steel die forgings GB/T 12467 (all parts) of a metal material welding quality requirements (GB/T 12467.1 ~ 12467.5-2009, ISO 3834-1 ~ 3834-4.2005, IDT) GB/T 13264-2008 percent defective in small Sampling procedures and sample forms GB/T 13306 signs GB 25974.2 hydraulic support for coal mine Part 2. Jack post and technical conditions GB 25974.3 coal hydraulic support Part 3. hydraulic control system and the valve MT76 hydraulic support (pillar) emulsified oil, and high concentrate aqueous hydraulic fluid MT/T 98 hydraulic support hose and hose assembly inspection standard MT/T 587 Hydraulic Support structure manufacturing technology conditions MT/T 986 with a U-shaped pin ore quick connect and accessories

3 Terms and Definitions

The following terms and definitions apply to this part of GB 25974. 3.1 bracket 3.1.1. Stand poweredsupport Hydraulically powered raising and lowering, forward motion and the like, for supporting the top plate of the device. 3.1.2. Two shield support post 2-legsshieldpoweredsupport The support beam and having a shield bracket by two uprights between the top beam and the base. 3.1.3 Poster support shield bracket 4-legsshieldpoweredsupport And a support bracket having a shield beam by four columns between the top beam and the base. 3.1.4 A support bracket chocksupport Between the top and base beams without support shield support beam through the pillar. 3.1.5 A stent-poweredsupportinAclass Annual output of 500 million tons for the face or a stent according to user requirements in the design of high reliability. 3.1.6 Class B bracket poweredsupportinBclass Other stents and stent caving coal face other than A class. 3.2 the main structure 3.2.1. The main structure supportcomponents Roof and withstand pressure delivery stent main components, including a top beam, gob shield, or pendulum rod and the base. 3.2.2. Canopy roof beams A single or a combination of parts of the holder, which in direct contact with the top plate, transfer the supporting force. 3.2.3 Pedestal base A single or a combination of parts of the holder, which in direct contact with the base plate, the supporting force is transmitted in the end plate of the bracket. 3.2.4 Gob shield goafshield A holder member, which wholly or partially absorbing and force transmitting support bracket, horizontal and torsional forces, either directly or via a link with Top beam and the base connector, with the cover face isolated old pond, waste rock caving withstand load. 3.2.5 Rod linkage Gob shield is connected with the base member is formed of the four-bar linkage, wherein the lower hinge point on the link to the base link, the hinge point of the link as high Front linkage. 3.3 Non-body structural member 3.3.1. Non-body structural member supportaccessories Supporting force is not subjected to the stent, but to ensure proper function of the stent member. 3.3.2 Over institutions advancingmechanism Goes face conveyor and holder device for-pull. 3.3.3 To help protect board sprag Hinged at the front end of support beam for supporting the coal face to help prevent the front portion of the bracket means caving coal and waste rock face into the space. 3.3.4 Advance support means forepolingdevice Means for newly exposed roof (not yet holder forward in time) after the formation of a sheet or a wall to help the coal shearer cutting support. 3.3.5 Anchoring device anchoringdevice Means for preventing movement of the work face, conveyors and shearer uncontrolled. 3.4 force 3.4.1. Rated working resistance yieldforce Support column generated when setting its safety valve opening pressure of the work force and (ignoring friction). 3.4.2 Design force ratedforce Maximum force of the stent or stent component design, by the geometry calculation value and the nominal operating resistance of the stent determined (ignoring friction Rub force). 3.4.3 Support force supportbearingforce Perpendicular force acting on the top plate, it is related to the height of the support stent reach its nominal operating resistance. 3.4.4 Additional force additionalforce Force generated by the mechanism holder under nominal operating resistance acts, it is related to the support height. 3.5 Other 3.5.1 Extravasation exosmicleakge External leaks of hydraulic components, the average every 5min bleed working fluid leakage than one drop. 3.5.2 Relative residual deformation valueofrelativeremainingdistortion When the top beam and the base is bent, the maximum amount of residual strain ratio of the distance between the two pads; and the base when the top torsion beam, the maximum residual Deformation measurement point to its distance is longer than the pad.

4 Requirements

4.1 General requirements 4.1.1 walkway The width of the walkway inside the stent 4.1.1.1 not less than 0.6m, a height not less than 0.4m, allowing the corner in FIG. 1 Tilt shown. In millimeters FIG 1 Minimum pedestrian 4.1.1.2 stent used should have sufficient space pedestrian, and should not interfere with a protruding member in the walking range of pedestrians. 4.1.1.3 should take anti-slip tread surface, for example tread plate, a plastic anti-skid pad wear. 4.1.1.4 should be inclined coal seam work suitable means to ensure the safety of pedestrians. 4.1.2 off the dust and refuse leak-proof device 4.1.2.1 stent structure should be able to eliminate dust mounting means, the mounting position and the type of dust suppression means should be negotiated. 4.1.2.2 stent structure should be safe pedestrian protection, to prevent waste rock face into the space from the top plate and the goaf. 4.1.3 Hydraulic guard member Structure of the stent so as not to be damaged during operation of hydraulic components required. 4.1.4 Anti-spalling means The maximum height of the stent is greater than or equal to 3.5m, should help install guard plate means, to help protect the plate to help protect and recover when to latch, to help protect jin Top safety valve should be installed. 4.1.5 Lifting point Entire rack bracket and the main components shall be provided with lifting points, lifting points shall be constructed to withstand 4 times the lifting force of the weight. Lifting points should be permanent (cases Such as by welding) clearly identified, indicating the design loading and the product description. 4.1.6 advance support means For cutting height to 3m, broken Roof advance support means should be provided. 4.1.7 single strut stopper base Support beam should be provided with a single pillar stopper base support. 4.1.8 assembly performance Holder assembly should have good performance, all parts of the holder interchangeability should meet the requirements, not through the matching of the assembly. 4.1.9 structure size Minimum height and a maximum height deviation height 4.1.9.1 stent is ± 50mm. 4.1.9.2 minimum width and the maximum width of the scaffold deviation ± 20mm. 4.1.10 hazard assessment Risk assessment should stand, should take measures to eliminate or reduce the risk of a variety of risks. Run stand, installation and maintenance prone Hazardous and dangerous conditions in Appendix A. 4.2 appearance quality 4.2.1 scaffold components and piping systems shall mounting positions predetermined pattern, reliable connection, neat and beautiful. The bracket should be fitted Clearly showing signs indicating various operations stent operations. 4.2.2 an outer surface of the stent to be painted, the paint should be uniform, seamless coating, blistering, peeling defects, such as cracks. 4.2.3 exposed welds should be consistent with MT/T 587's. 4.2.4 Casting appearance should be consistent with GB/T 11352 of. 4.2.5 Forging appearance should be consistent with GB/T 12361 of. 4.2.6 exposed chrome layer should meet the requirements of GB 25974.2. 4.3 Operating Performance 4.3.1 stent should easy to operate, accurate operation of the moving parts, flexible, without Zhise, other cards, interference phenomena, all moving parts reaches a limit State no damage. 4.3.2 rated stent liquid supply pressure, the inlet flow conditions of the liquid return line and system design, the stent is completed column down - frame shift - L Column operation The maximum cycle time should not exceed 1.1 times the design value. 4.4 sealability 4.4.1 the front beam column and the jack piston chamber at 90% of rated pressure regulator 5min, the pressure should drop. 4.4.2 pillar outer living column extending to 2/3 of a full stroke, is placed under natural conditions for 16 h, live retraction column should be less than 2mm (negative temperature Impact). 4.4.3 front beam jack rod extending to the outer 2/3 of the full stroke, 16h is placed in a natural state, the piston rod retraction should be less than 2mm (Exclude the effect of temperature). 4.4.4 at rated pressure liquid supply, the bracket according to a predetermined operation of the operation, each of the outer leakage of hydraulic elements should not occur. 4.5 Safety Performance Setting load is rated at rated 4.5.1 liquid supply pressure, supports in the test should not be less than 95% of the height (or the chamber pressure measured at the column Force, should not be less than 95% of the rated pressure of the liquid supply). 4.5.2 stand working pressure not greater than 110% of the rated opening pressure of not less than 90% of the nominal opening pressure. 4.5.3 front beam Ping Heng jack and jack working chamber pressure should not more than 110% of rated working pressure, closing pressure not less than the amount of 90% of a given operating pressure. 4.6 adaptability 4.6.1 - moving means in the retracted position, the connector connecting hole and supporting the conveyor lift up the amount of not less than 200mm (thin seam branched Holder or belt holder lifting the base means be not less than 100mm), the amount of drop of not less than 60mm. 4.6.2 When the maximum height of the bracket, the top beam depression angle of not less than the swing 15 °. When the stent increases the minimum height 300mm, Yang swing headpiece Angle should not be less than 10 °. 4.6.3 the base plate than the pressure of the stent with special requirements, than the pressure should be measured, which should be less than the compressive strength requirements permit floor. 4.7 Let shrink performance Scaffold should allow the top plate to withstand subsidence shrinkable, when condensing the roof sinking holder, the supporting force should not exceed the maximum rated working resistance 110%. The stent structure should not operate when the stent by condensing the waste rock caving hindered. 4.8 Strength 4.8.1 the main structural strength member After the stent body structure according to 5.9.1 and 5.9.2 tests, various loading test, the main structural member and the base material should not have open seam crack. Headpieces relative residual deformation and the base should be less than 0.4%; the center line of the top beam relative to the base center line offset angle variation should not At 3 °, other components not affect use damage and deformation. 4.8.2 Non-body strength structural member 4.8.2.1 headpiece sideguard 5.9.1 5.9.3.1 test and by the main force receiving member should not damage the weld cracking and residue modification should not affect the free side guards Out. 4.8.2.2 Ping Heng jack connected structural member 5.9.1 and 5.9.3.2 by the test, and the Ping Heng the jack connecting structure member should not have an impact and deformation damage use. 4.8.2.3 help guard plate 5.9.1 and 5.9.3.3 by the test, it should not have structural member used in an impact and deformation damage. 4.8.2.4 front beam 5.9.1 and 5.9.3.4 by the test, and each connected to the front beam structural member should not have an impact and deformation damage use. 4.8.2.5 telescopic beam 5.9.1 5.9.3.5 test and by the telescopic beams should not have impact damage and residual deformation telescopic. 4.8.2.6 Over institutions 5.9.1 5.9.3.6 and press test, the passage means and there should be no impact deformation damage use. 4.8.2.7 post connection member 5.9.1 5.9.3.7 press and after the test to 1.2 times the rated pressure of the liquid supply contraction single column, each of the connection pins should be changed residual shape. Rated liquid supply pressure of 1.5 times the shrinkage pillar, column column bottom allows fracture pin, but should not affect the remaining removable connection Deformation. 4.8.2.8 base bottom adjusting mechanism 5.9.1 5.9.3.8 and press test, the bottom adjusting mechanism should not affect the use of damage and deformation. 4.9 Durability Durability Test by 5.10, there should not be base metal cracking after the test, the same weld cracking should be limited to the member 2, the weld does not Should be greater than 50mm long crack; residual deformation should be less than 0.5% from the corresponding fulcrum; Alice twisting deformation not greater than the maximum side member Roof beam center line offset relative to the centerline of the chassis angle variation should be less than 3 °;; 0.5% of the length of each member shall not be damaged and so influential By deformation. 4.10 hydraulic component part 4.10.1 leg and jack Leg and jack should meet the requirements of GB 25974.2. 4.10.2 valve and hydraulic control system And a hydraulic control system valve stent should meet the requirements of GB 25974.3. 4.10.3 hose assemblies and fittings accessories Hose assemblies shall comply with the provisions of MT/T 98's. U-shaped pin quick connect and accessories shall comply with MT/T 986 a. 4.11 Material 4.11.1 Steel 4.11.1.1 General requirements The support component material to meet the performance requirements of the design drawings. When the stress reaches 90% is calculated allowable stress, the steel species Tensile strength should be more than 1.08 times greater than the yield limit. A material elongation of not less than 10%; elongation pin is not less than 9%. 4.11.1.2 welded steel member Impurities should be used uniformly distributed, stable crystal, killed steel for welding, and should be met. a) the ferrite grain size are greater than or equal to 6; b) the temperature should be -20 ℃ notch impact energy of at least the following (to be independent of the rolling direction of the sample). 1) less than or equal to the yield limit steel 620N/mm2, in order to 20J; 2) yield strength of greater than 620N/mm2 steel for 25J. 4.11.1.3 Non-welded steel member Steel should be deoxidized notch impact energy at temperature 20 ℃ be not less than 25J. 4.11.2 light metal The support component and the outer surface of the accessory (including, brushing or plating) should not be used a light metal or a light metal alloy material, should meet GB 3836.1-2000 provisions of Chapter 8. 4.11.3 Other materials Other materials used should meet the design requirements. Non-metallic materials shall comply with the provisions of Chapter 7 GB 3836.1-2000. 4.12 Welding Welding operations shall be required (all parts) of the GB/T 12467. 4.13 allowable stress and static analysis Allowable stress bracket member and static calculation see Appendix B.

5 Test methods

5.1 Test conditions 5.1.1 Test requirements 5.1.1.1 test should be performed on a complete frame, also allows tests on the bracket member or members of the group joint action. After loading the test substrate material 5.1.1.2 holder member should not deformed or damaged and affect weld cracking use. 5.1.1.3 All test results and test values should be fully documented. 5.1.1.4 In addition to loading are within 5.8 external load. 5.1.2 Test apparatus and conditions 5.1.2.1 Test loading means has an outer and inner loading test rig test bed, which should meet the load capacity and the height of the test stand is required. 5.1.2.2 flow and pressure fluid source should be greater than or equal to the test pressure and the stent design flow. 5.1.2.3 pressurized liquid supply system should be functional, the test stand may be pressurized to 1.5 times the rated working pressure. 5.1.2.4 ligated into the sample holder, the return pipe diameter should be designed into liquid return tube diameter coincide or not less than the design diameter. 5.1.2.5 auxiliary liquid supply system can function with an automatic loading cycle. 5.1.2.6 test equipment and measurement instruments shall comply with the relevant regulations, and to be traceable to national measurement standard. 5.1.2.7 using emulsified oil or working fluid concentrate with soft water under neutral MT76 5.95 by mass ratio of the aqueous solution preparation of high Pressure liquid. 5.1.2.8 during the test fluid temperature control (10 ~ 50) ℃, the working fluid using 40μm filter accuracy, and should be provided with a magnetic filter. 5.1.2.9 measurement accuracy using class C measuring system tolerance to comply with Table 1. Table 1 allows the systematic errors of the measurement system Measurements Level A Class B C Flow error /% ± 0.5 ± 1.5 ± 2.5 Pressure error (gauge pressure ≥0.2MPa) /% ± 0.5 ± 1.5 ± 2.5 Temperature error/℃ ± 0.5 ± 1.0 ± 2.0 5.1.3 loading pad Pad for transmitting symmetric bending load is such that the average specific pressure is not greater than 25MPa, the width should be 150mm, the length of the portion should reach Member of the full width. If the test than when the pressure exceeds 25MPa, the pad should be increased accordingly. Transmitting torsional load than the pressure pad should be no greater than 25MPa, width should be 200mm, the width of the member should reach a length of 1/4; If separable chassis, the spacer length should be at such a load of To a single sub-base full width. Pad should be placed at the center of the transmission force and the end bracket member under test, if necessary, these can be Different positions, in order to stabilize the load. Pad structure should not impede the free movement of flexible member, and to prevent edge squeezed. Height should ensure that the test does not interfere branched Deformation of the frame member. When the top beam and the base end portion of the arcuate or beveled, loading pad shown in Figure 2. A --- pads; --- pad distance D and the edge of the s...

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