1、BRITISH STANDARDBS EN 14591-2:2007IncorporatingcorrigendumSeptember 2008Explosion prevention and protection in underground mines Protective systems Part 2: Passive water trough barriersICS 13.230; 73.100.99g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g4
2、9g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58National forewordThis British Standard is the UK implementation of EN 14591-2:2007, incorporating corrigendum September 2008.The UK participation in its preparation was entrusted to Technical Co
3、mmittee FSH/23, Explosion and fire precautions in industrial and chemical plant.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its cor
4、rect application.Compliance with a British Standard cannot confer immunity from legal obligations.BS EN 14591-2:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 29 June 2007 BSI 2010Amendments/corrigenda issued since publicationDate Commen
5、ts 28 February 2010 Implementation of CEN corrigendum September 2008; row inserted in Table ZA.1 for 1.2.1ISBN 978 0 580 64526 6EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 14591-2March 2007ICS 13.230; 73.100.99English VersionIncorporating corrigendumSeptember 2008Explosion prevention and prote
6、ction in underground mines -Protective systems - Part 2: Passive water trough barriersProtection contre lexplosion dans les mines souterraines -Systmes de protection - Partie 2: Arrts-barrages passifs bacs leauExplosionsschutz in untertgigen Bergwerken -Schutzsysteme - Teil 2: Passive Wassertrogsper
7、renThis European Standard was approved by CEN on 4 February 2007.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical re
8、ferences concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member
9、into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia
10、, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 20
11、07 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14591-2:2007: EEN 14591-2:2007 (E) 2 Contents Page Foreword5 Introduction .6 1 Scope 7 2 Normative references 7 3 Terms and definitions .7 4 Construction requirements of water trough
12、s .10 4.1 General10 4.2 Dimensions, specifications 10 5 Testing of water troughs.11 5.1 General11 5.2 Construction tests .11 5.2.1 Shape, capacity, dimensions11 5.2.2 Strength, shape retention .11 5.2.3 Water level indicator11 5.3 Testing of electrostatic properties.12 5.3.1 Test method12 5.3.2 Asse
13、ssment12 6 Additional fittings for water troughs12 7 Marking of water troughs12 8 Construction of concentrated and distributed water trough barriers12 8.1 General12 8.2 Framework structures .12 8.3 Arrangement of troughs in the roadway cross-section.13 8.4 Configuration of water trough barriers in m
14、ine workings.13 9 Marking of water trough barriers .15 10 Information for use 16 Annex A (normative) Construction of quick-deploy passive water trough barriers 17 A.1 General17 A.2 Trough frames17 A.3 Ropes and chains 17 A.4 Attachment supports.17 A.5 Arrangement of the quick-deploy water trough bar
15、riers in the roadway.17 A.6 Volume of water to be contained by quick-deploy water trough barriers .18 Annex B (normative) Example of acceptable test procedure for water troughs 19 B.1 Testing of heat reaction properties19 B.1.1 Test procedure.19 B.1.2 Test arrangement.19 B.1.3 Procedure .20 B.1.4 As
16、sessment20 B.2 Testing of explosion properties .20 B.2.1 Testing of water dispersion20 B.2.2 Testing the extinguishing efficiency in full-scale tests .22 B.3 Testing of fire-resistance properties .22 Annex C (informative) Example of marking of water troughs 23 BS EN 14591-2:2007EN 14591-2:2007 (E) 3
17、 Annex D (informative) Examples for configuration of water troughs24 Annex E (informative) Example for marking of water trough barriers 44 Annex F (normative) Instructions for water trough barriers 45 Annex ZA (informative) Relationship between this European Standard and the Essential Requirements o
18、f EU Directive 94/9/EC46 Bibliography48 Figures Figure 1 Trough group, plan view 9 Figure 2 Water trough type A (side elevations) 10 Figure 3 Water trough type B (side elevations) 10 Figure 4 General rules for water trough barriers in mine workings .15 Figure A.1 Quick-deploy water trough barrier (e
19、xample) 18 Figure B.1 Test arrangement for determining heat reaction properties 19 Figure B.2 Test arrangement for investigating water dispersion .21 Figure D.1 Location of water troughs, sectional view .24 Figure D.2 Arrangement of troughs in roadway cross-section coverage.25 Figure D.3 Arrangement
20、 of troughs in roadway cross-section horizontal distances .26 Figure D.4 Arrangement of troughs in the roadway cross-section vertical distances27 Figure D.5 Arrangement of troughs in the roadway cross-section vertical distances27 Figure D.6 Arrangement of troughs in the roadway cross-section transve
21、rse and longitudinal position.28 Figure D.7 Arrangement of troughs in the roadway cross-section Obscurement by supports or fixtures29 Figure D.8 Arrangement of troughs in the roadway cross-section Obscurement by supports or fixtures30 Figure D.9 Arrangement of troughs in the roadway cross-section Ob
22、scurement by troughs .30 Figure D.10 Arrangement of vertically-offset troughs in the roadway cross-section, distance 415 275 5 760 5 675 90 4,5 Type B 20 2 500 2,5 415 320 5 760 5 675 90 4,5 The covers shall be designed to give a flush fit with the outer rim of the containers. 5 Testing of water tro
23、ughs 5.1 General The test pieces for the tests described below comprise one or several water troughs which shall come from the same production run. The number of test pieces required is determined by the respective testing station. When issuing contracts for testing, each testing station shall be pr
24、ovided not only with descriptions and drawings of the equipment (e.g. containers, covers, floats and lid holders), but also with precise data on the composition of the material used. For an example of acceptable test procedures, see Annex B. NOTE Other test procedures are under consideration. 5.2 Co
25、nstruction tests 5.2.1 Shape, capacity, dimensions The specifications laid down in 4.2 shall be used as a basis for testing the shape, dimensions and capacity of the water troughs. 5.2.2 Strength, shape retention When a uniform static load is applied to a stack of water troughs, composed of five con
26、tainers fitted one inside the other, by a force of 500 N (direction of force at right angles to the container bottoms), the containers shall not suffer damage or permanent deformation. During subsequent unstacking, the containers shall not be wedged together and shall not be damaged. 5.2.3 Water lev
27、el indicator The minimum water level indicator shall be checked for correct operation and accuracy. The maximum margin of indicator error shall be 5 %. BS EN 14591-2:2007EN 14591-2:2007 (E) 12 5.3 Testing of electrostatic properties 5.3.1 Test method The surface resistance shall be tested in accorda
28、nce with EN 13463-1. The test voltage shall be 100 V. The measured value shall be read 60 s after the test voltage has been applied. The measurement shall be carried out in standard atmosphere 23/50-2 according to ISO 554. 5.3.2 Assessment Containers and matching covers, together with all attachment
29、s, shall be fitted together in a conductive manner. Conduction shall take place both externally and internally. The water trough being tested meets the requirements when the surface resistance RoAis less than 109. 6 Additional fittings for water troughs Water troughs may be provided with additional
30、fittings, such as level indicators and filling and draining devices. These additional fittings shall not conflict with the construction requirements laid down in clause 4. 7 Marking of water troughs Water troughs (containers and covers) shall be marked. An example is given in Annex C. 8 Construction
31、 of concentrated and distributed water trough barriers 8.1 General The task of a passive water trough barrier is to fill all the roadway cross-section with water if it is exposed to the explosion blast pressure wave. Water trough barriers comprise troughs which are filled with water (and, if applica
32、ble, a permissible additive) and arranged in trough groups. Trough groups are usually formed by special framework structures, shelves or by arranging the troughs on the floor or on appropriate fixtures. These water trough barriers are designated as fixed passive water trough barriers. Water trough b
33、arriers will only be effective for extinguishing a fire subject to being arranged as specified in 8.3 and 8.4. 8.2 Framework structures Framework structures shall be capable of supporting the applied load. Each structure normally comprises two beams or one shelf arranged at right angles to the roadw
34、ay axis and a number of cross-pieces set at right angles to the beams. The framework structures, beams or shelves shall be attached to the supports or to the roadway fixtures by means of suitable mountings. Chains, steel ropes or suspension rods can also be used for this purpose. The framework struc
35、tures shall be designed in such a way that suspended troughs can be supported on all sides by the full width of their edges, or failing that at least by the full width of their long sides, or that the troughs can be constructed where necessary using battens. BS EN 14591-2:2007EN 14591-2:2007 (E) 13
36、8.3 Arrangement of troughs in the roadway cross-section The number of water troughs in a trough group shall be sufficient to comply with 3.9 and 3.10. The trough groups shall cover the greatest width of the roadway cross-section (floor width or roadway diameter) at the point of installation. The ach
37、ieved coverage is as follows: at least 35 % for roadway cross-sections of up to 10 m2 at least 50 % for roadway cross-sections of up to 15 m2 at least 60 % for roadway cross-sections of over 15 m2. This calculation is based on measurements taken between the edges of the outer troughs of the trough g
38、roup at the sides of the roadway. The horizontal distance measured at right angles to the roadway direction between the roadway wall and the nearest trough shall not exceed 1,2 m and between two troughs shall not exceed 1,5 m. The total distances shall not exceed 1,8 m. The vertical distance between
39、 the bottom of any trough and the boundary of the roadway cross-section shall not exceed 2,6 m in a downward direction nor 2,0 m in an upward direction. If the distance measured in an upward direction from a trough has to be greater than 2,0 m, an additional trough shall be installed. In this case,
40、the vertical distance between the bottoms of the troughs in each row shall be less than 2,0 m. Troughs are normally installed with their long sides at right angles to the roadway direction (transverse arrangement). As a deviation from this, individual troughs can be arranged longitudinally (longitud
41、inal arrangement), though the number shall not exceed half of all the troughs in the group where this is necessary in order to provide cover for the roadway width and to reduce the intermediate spaces. It is permitted to arrange more than 50 % of the troughs in the longitudinal direction if the exti
42、nguishing effectiveness is proved by experiments. Troughs shall be arranged so that they are not obscured by supports or by roadway fixtures. Troughs which are spaced less than 1,2 m apart in the direction of the roadway shall not obscure one another. Troughs which are arranged at a distance of 0,5
43、m above other troughs shall not obscure more than half the lid area of any trough located beneath them. 8.4 Configuration of water trough barriers in mine workings The distance between the water trough barriers and the intersections or junctions shall be kept as small as possible and shall not excee
44、d 75 m in the case of concentrated water trough barriers and 30 m in the case of distributed water trough barriers. The maximum distances of 75 m and 30 m between intersections and junctions do not apply when there are no distances greater than 200 m between adjacent concentrated water trough barrie
45、rs designed to cordon off the intersection and junction areas. The distance requirements do not apply either between closely-spaced intersections and junctions provided that in any circumstance which may arise the distance between a distributed water trough barrier and an adjacent distributed or con
46、centrated water trough barrier designed to cordon off the intersection and junction areas does not exceed 120 m. In this zone, the erection of water trough barriers can be dispensed with. This means that points where roadways intersect with surface shafts, shaft insets or staple shafts are treated a
47、s BS EN 14591-2:2007EN 14591-2:2007 (E) 14 intersections or junctions. The trough groups of these distributed water trough barriers shall contain a quantity of at least 200 l of water per square metre of roadway cross-section. Concentrated water trough barriers constructed in roadways shall be arran
48、ged in such a way that the distance between one water trough barrier and another does not exceed 400 m. Distributed water trough barriers constructed in roadways shall be arranged in such a way that the distance between the trough groups does not exceed 30 m. Within a roadway, the distance between a
49、 concentrated water trough barrier and the first trough group of a distributed water trough barrier shall not exceed 30 m. By contrast, the distance between a concentrated water trough barrier and the first trough group of a distributed water trough barrier, when measured through an individual roadway intersection or junction, can be as much as 105 m (30 m + 75 m). NOTE 1 Usually, in gate-roads and in mechanized in-seam drivages, water trough barriers are erected as distributed barriers. Where no
