1、BRITISH STANDARD BS 227:1995 Specification for H-section steel arches for use in minesBS227:1995 This British Standard, having been prepared under the directionof the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 September1995 BSI 09-1
2、999 First published May1926 Second edition April1934 Third edition March1959 Fourth edition November1966 Fifth edition December1970 Sixth edition September1995 The following BSI references relate to the work on this standard: Committee reference MRE/2 Draft for comment92/83713 DC ISBN 0 580 23952 7
3、Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee MRE/2, Steel arches for use in mines, upon which the following bodies were represented: Association of British Mining Equipment Companies British Coal Corporation British St
4、eel Industry Health and Safety Executive Union of Democratic Mineworkers Amendments issued since publication Amd. No. Date CommentsBS227:1995 BSI 09-1999 i Contents Page Committees responsible Inside front cover Foreword iii 1 Scope 1 2 Normative references 1 3 Definitions 1 4 Information and requir
5、ements to be agreed and to be documented 2 5 Common requirements 2 6 Semi-circular and double radiused arches 3 7 Cambered and flat top arches 6 Annex A (normative) Material testing 29 Annex B (normative) Joint assembly testing 29 Figure 1 Tolerances on cross-section 7 Figure 2 Rolled steel in-web f
6、ishplated joint 8 Figure 3 Pressed steel in-web fishplated joint 10 Figure 4 Wrap-around fishplated joint 12 Figure 5 Fish bolt 13 Figure 6 Semi-circular arch 14 Figure 7 Strut hole positioning 15 Figure 8 Strut hole positioning 15 Figure 9 Strut hole positioning 15 Figure 10 Strut hole positioning
7、15 Figure 11 Strut hole positioning 16 Figure 12 Strut hole positioning 16 Figure 13 Strut hole positioning 16 Figure 14 Strut hole positioning 16 Figure 15 Strut hole positioning 16 Figure 16 Strut hole positioning 16 Figure 17 Strut hole positioning 17 Figure 18 Strut hole positioning 17 Figure 19
8、 Strut hole positioning 17 Figure 20 Strut hole positioning 17 Figure 21 Strut hole positioning 17 Figure 22 Strut hole positioning 17 Figure 23 Strut hole positioning 18 Figure 24 Strut hole positioning 18 Figure 25 Strut hole positioning 18 Figure 26 Strut hole positioning 18 Figure 27 Strut hole
9、positioning 18 Figure 28 Strut hole positioning 18 Figure 29 Strut hole positioning 19 Figure 30 Strut hole positioning 19 Figure 31 Strut hole positioning 19 Figure 32 Strut hole positioning 19 Figure 33 Strut hole positioning 19 Figure 34 Strut hole positioning 19 Figure 35 Strut hole positioning
10、20 Figure 36 Strut hole positioning 20 Figure 37 Strut hole positioning 20 Figure 38 Strut hole positioning 20BS227:1995 BSI 09-1999 ii Page Figure 39 Strut hole positioning 20 Figure 40 Strut hole positioning 20 Figure 41 Strut hole positioning 21 Figure 42 Strut hole positioning 21 Figure 43 Semi-
11、circular arch: refuge hole type 22 Figure 44 Double radiused arch 22 Figure 45 Joint holes in semi-circular and double radiused arch members 23 Figure 46 Cambered top arch with120 cranked fishplate 23 Figure 47 Cambered top arch with135 cranked fishplate 24 Figure 48 Flat top arch with120 cranked fi
12、shplate 24 Figure 49 Flat top arch with135 cranked fishplate 25 Figure 50 Flat top arch with straight vertical legs and beam overhang 25 Figure 51 Flat top arch with straight inclined legs and beam overhang 26 Figure 52 Hole details for cranked fishplates in arch members withmitredends 26 Figure 53
13、Hole details for cranked fishplates in arch members withsquarecutends 28 Figure B.1.1 Test arrangements for flange-mounted joint assemblies: closure 30 Figure B.1.2 Test arrangements for flange-mounted joint assemblies: opening 31 Figure B.1.3 Test arrangements for flange-mounted joint assemblies:la
14、teralbending 32 Figure B.2.1 Test arrangements for end-mounted joint assemblies: closure 33 Figure B.2.2 Test arrangements for end-mounted joint assemblies: opening 34 Figure B.2.3 Test arrangements for end-mounted joint assemblies:lateralbending 35 Figure B.3.1 Test arrangements for angled fishplat
15、e joint assemblies: closure 36 Figure B.3.2 Test arrangements for angled fishplate joint assemblies: opening 37 Figure B.3.3 Test arrangements for angled fishplate joint assemblies:lateralbending 38 Figure B.4.1 Test arrangements for fishplate joint assemblies: closure 39 Figure B.4.2 Test arrangeme
16、nts for fishplate joint assemblies: opening 40 Figure B.4.3 Test arrangements for fishplate joint assemblies: lateral bending 41 Table 1 Steel properties 2 Table 2 Preferred sections 2 Table 3 Semi-circular arch forms 4 Table 4 Preferred double radiused3-piece arch forms in127 114mm and 152 127mm H-
17、section 5 Table 5 Fish bolts 5 Table 6 Preferred beam lengths and arch heights 6 List of references Inside back coverBS227:1995 BSI 09-1999 iii Foreword This British Standard has been prepared under the direction of the Engineering Sector Board. It was first issued in1926 and later revised in1939,19
18、59,1966 and1970. This new edition takes into account further experience that has been gained in the use of steel arch supports in mines. All dimensions and masses are specified in metric units. Equivalent imperial units are not given and should no longer be used. Use was made of British Coal Specifi
19、cation114 and the British Coal draft specification for cambered and flat top roadway supports. Agreement could not be reached on whether the torque tightening requirements for bolts and fasteners should be included and these are not therefore included in the standard. The decline in the use of semi-
20、circular and double-radiused arches has been reflected in the reduction of specified profiles from the previous edition. The introduction of retreat mining methods since the last revision has led to the creation of a new section for cambered and flat top arches. Because of the many design variations
21、 in the joints for cambered and flat top arches, a specification for this type based on performance has been introduced. The114 114 section size referred to in the previous edition has been replaced by a127 114 section of the same mass per unit length and all sections are now given as preferred, rat
22、her than specified, sizes and mass per unit lengths. Additionally only a single grade of steel is specified instead of the previous three. Product certification. Users of this British Standard are advised to consider the desirability of third party certification of product conformity with this Briti
23、sh Standard based on testing and product surveillance, which may be coupled with assessment of a suppliers quality systems against the appropriate Part of BSENISO9000. Enquiries as to the availability of third party certification are forwarded by BSI to the Association of Certification bodies. If a
24、third party certification scheme does not already exist, users should consider approaching an appropriate body from the list of Association members. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct
25、 application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages ito iv, pages1 to42, an inside back cover and a back cover. This standard has been updated (see copyright d
26、ate) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.iv blankBS227:1995 BSI 09-1999 1 1 Scope This British Standard specifies requirements for H-section steel arches for use in underground roadways in mines. This standard applies to s
27、emi-circular and double radiused profile arches and cambered and flat-top arches. This standard excludes H-section steel arches used in roadway junction structures. In addition to the definitive requirements, this standard also requires the items detailed in6.1, 6.2, 7.1 and7.5 to be documented. For
28、 compliance with this standard, both the definitive requirements and the documented items have to be satisfied. NOTEDimensions on figures are in millimetres. 2 Normative references This standard incorporates, by dated or undated reference, provisions from other publications. These normative referenc
29、es are made at the appropriate places in the text and the cited publications are listed on the inside back cover. For dated references, only the edition cited applies; any subsequent amendments to or revisions of the cited publication apply to this standard only when incorporated in the reference by
30、 amendment or revision. For undated references, the latest edition of the cited publication applies, together with any amendments. 3 Definitions For the purposes of this British Standard the following definitions apply. 3.1 mine a facility established for extracting coal or other minerals from seams
31、 without removal of the overburden and accessed via a shaft or a drift tunnel 3.2 underground roadways tunnels in mines for access, ventilation and extraction purposes 3.3 H-section steel arch a structure made from lengths of hot rolled steel H-shaped section, manufactured specifically for the minin
32、g industry and used for supporting the sides and roof of underground roadways in mines. It comprises two or more side members or legs and one or more top members or beams or crowns to form a portal frame with an open base. The side members or legs may be splayed out at an angle 3.4 strut a nominally
33、 horizontal structural member used to join adjacent arches to form a continuous structure along the length of the roadway as it is formed 3.5 strut hole a hole placed centrally along the web of an arch member through which a bolt can be passed for the purpose of attaching struts 3.6 joint the point
34、at which mating members of an arch are joined during assembly 3.7 joint hole a hole placed centrally along the web of a member to enable two members to be joined end to end, to form a butt joint by means of fishplates 3.8 fishplate a plate used to join two members end to end to effect a butt joint.
35、Fishplates are usually fitted in pairs between the flanges on each side of the web and bolted through with, usually, two bolts to each side of the joint. Fishplates can also be curved having the same curvature as the members in order to effect a continuously curved arch 3.9 fishplate holes holes pla
36、ced, usually in pairs, centrally along the web of the members to either side of a butt joint, through which bolts can be passed in order to join the members end to end using fishplates 3.10 fish bolts and nuts bolts and nuts used to connect pairs of fishplates 3.11 cranked fishplate a fishplate form
37、ed at an angle, usually120 to135 3.12 corner brackets and clips brackets and clips used to join members where the flange of the roof member is positioned to rest on the upper end of a side or leg member. The joint is effected using one or more boltsBS227:1995 2 BSI 09-1999 3.13 single bolt joints a
38、type of joint used to join two members at an angle. They usually comprise mating lugs welded to the ends or sides of the members which can be bolted together to effect the joint using a single bolt 3.14 base width the distance between the inside flanges of the H-section arch measured across the base
39、 3.15 chord length the distance measured in a straight line between the ends of an H-section member taken from the inside edges 4 Information and requirements to be agreed and to be documented 4.1 The following information to be supplied by the purchaser shall be fully documented. Both the definitiv
40、e requirements specified throughout the standard and the following documented items shall be satisfied before a claim of compliance with the standard can be made and verified: a) for double radiused arches, the support base width (see6.2); b) for cambered and flat top arches, the beam lengths and su
41、pport heights (see7.1). 4.2 The following item to be agreed between the contracting parties which are specified in the clauses referred to shall be fully documented. Both the definitive requirements specified throughout the standard and the following documented item shall be satisfied before a claim
42、 of compliance with the standard can be made and verified. For all H-section members, the requirement, if any, for strut holes (see6.1, 6.2 and7.5). 5 Common requirements 5.1 General Clauses5.2 to5.6 shall apply to all arches and members covered in clause6 and clause7 unless otherwise stated. 5.2 Ma
43、terial The properties of the steel shall conform with Table 1 and shall be tested in accordance with Annex A. Table 1 Steel properties NOTEAn example of such a steel is grade Fe430B of BSEN10025. 5.3 Cross-section profile The arch as rolled cross-section profile shall be in accordance with the provi
44、sions for joists with tapered flanges as specified inBS4-1 and be subject to the following additional tolerances on dimensions as indicated in Figure 1: a) thickness of flanges T 2.5%; b) out of squareness of flanges (P P1)2mm maximum. NOTEThe preferred cross-section dimensions and masses per unit l
45、ength are given in Table 2. Table 2 Preferred sections 5.4 Strut holes The requirement for strut holes in the members shall be by agreement between the supplier and purchaser (see4.2). Where it is agreed that there shall be strut holes in the member they shall have a diameter of25mm 2mm and their ce
46、ntres shall be within2mm of the centre line of the member section. 5.5 Fishplates 5.5.1 Material Steel shall conform with5.2. Chemical composition Carbon Sulfur Phosphorus Nitrogen Manganese Silicon 0.25%max. 0.060%max. 0.060%max. 0.010%max. 1.60%max. 0.50%max. Mechanical properties Tensile strength
47、 Elongation 430580N/mm 222%min. Section size mm Mass per unit length kg/m 89 89 102 102 127 114 127 114 152 127 19.35 23.07 26.79 29.76 37.20BS227:1995 BSI 09-1999 3 5.5.2 Material testing Fishplates made from any material other than in5.2, or by any other method than that of5.2, the joints made sha
48、ll be type tested in accordance with Annex B. 5.5.3 Fishplate cross-section Hot rolled and pressed steel fishplate cross-sections shall be in accordance with Figure 2 to Figure 4 as appropriate. 5.5.4 Fishplate holes Fishplate holes shall be dimensioned and positioned in accordance with Figure 2 to
49、Figure 4 as appropriate. 5.5.5 Fish bolts and nuts Fish bolts shall have square heads and necks, and shall be of sufficient length to be used with a full hexagon nut which, when tightened down, shall leave2mm of bolt protruding. Bolts and nuts shall conform to Figure 5 and also strength grade designation4.6 and all other requirements shall be in accordance with BS4190. Threads shall be coarse pitch series in accord
