1、July 2007DEUTSCHE NORM English price group 17No part of this standard may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 13.230; 73.100.99!,z(M“98
2、70542www.din.deDDIN EN 14591-2Explosion prevention and protection in underground mines Protective systems Part 2: Passive water trough barriersEnglish version of DIN EN 14591-2:2007-07Explosionsschutz in untertgigen Bergwerken Schutzsysteme Teil 2: Passive WassertrogsperrenEnglische Fassung DIN EN 1
3、4591-2:2007-07SupersedesDIN 21576:1988-04www.beuth.deDocument comprises 52 pages09.07DIN EN 14591-2:2007-07 2 Start of validity This standard is valid from 1 July 2007. National foreword This standard includes safety requirements. This standard has been prepared by CEN/TC 305 “Potentially explosive
4、atmospheres Explosion prevention and protection” (Secretariat: DIN, Germany), Working Group WG 5 “Equipment and protection systems for mining”. The responsible German body involved in its preparation was the Normenausschuss Bergbau (Mining Standards Committee), Technical Committee Explosionsschutz.
5、DIN EN 14591 Explosion prevention and protection in underground mines Protective systems consists of the following parts: Part 1: 2-bar-explosion-proof ventilation structure Part 2: Passive water trough barriers Part 4: Automatic extinguishing systems for road headers The content of E DIN EN 14591-3
6、:2004-04 has been incorporated into this standard. Based on Article 95 of the EC Treaty, Directive 94/9/EC of the European Parliament and the Council of 23 March 1994 on the approximation of the laws of the Member States concerning equipment and protective systems intended for use in potentially exp
7、losive atmospheres regulates explosion protection in underground and above ground mining. Amendments This standard differs from DIN 21576:1988-04 as follows: a) The standard has been completely revised and brought into line with the state of the art. b) Terms and definitions have been included. c) C
8、ontainer dimensions have been revised and extended. d) Requirements for testing water troughs and test methods have been specified. e) Specifications for marking water troughs and water trough barriers have been included. f) Requirements for the construction of water trough barriers have been specif
9、ied and examples of the arrangement of troughs have been added. DIN EN 14591-2:2007-07 3 g) Requirements for the construction of quick-deploy water trough barriers have been specified (see Annex A). h) Specifications regarding instructions for water trough barriers have been included (see Annex F).
10、Previous editions DIN 21576: 1969-12, 1988-04 National Annex NA (informative) Bibliography DIN EN 1127-2, Explosive atmospheres Explosion prevention and protection Part 2: Basic concepts and methodology for mining DIN EN 14591-2:2007-07 4 This page is intentionally blank EUROPEAN STANDARDNORME EUROP
11、ENNEEUROPISCHE NORMEN 14591-2March 2007ICS 13.230; 73.100.99English VersionExplosion prevention and protection in underground mines -Protective systems - Part 2: Passive water trough barriersProtection contre lexplosion dans les mines souterraines -Systmes de protection - Partie 2: Arrts-barrages pa
12、ssifs bacs leauExplosionsschutz in untertgigen Bergwerken -Schutzsysteme - Teil 2: Passive WassertrogsperrenThis 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 EuropeanS
13、tandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references 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, Fren
14、ch, German). A version in any other language made by translationunder the responsibility of a CEN member 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, Cz
15、ech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPE
16、N DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2007 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
17、1 Scope 7 2 Normative references 7 3 Terms and definitions .7 4 Construction requirements of water troughs .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 .1
18、1 5.2.3 Water level indicator11 5.3 Testing of electrostatic properties.12 5.3.1 Test method12 5.3.2 Assessment12 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
19、.3 Arrangement of troughs in the roadway cross-section.13 8.4 Configuration of water trough barriers in mine 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 frames1
20、7 A.3 Ropes and chains 17 A.4 Attachment supports.17 A.5 Arrangement of the quick-deploy water trough barriers 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
21、heat reaction properties19 B.1.1 Test procedure.19 B.1.2 Test arrangement.19 B.1.3 Procedure .20 B.1.4 Assessment20 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、 .22 Annex C (informative) Example of marking of water troughs 23 EN 14591-2:2007 (E) 3 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 (in
23、formative) Relationship between this European Standard and the Essential Requirements of 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 wat
24、er trough barriers in mine workings .15 Figure A.1 Quick-deploy water trough barrier (example) 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
25、 D.2 Arrangement of troughs in roadway cross-section coverage.25 Figure D.3 Arrangement 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 vert
26、ical distances27 Figure D.6 Arrangement of troughs in the roadway cross-section transverse 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 s
27、upports or fixtures30 Figure D.9 Arrangement of troughs in the roadway cross-section Obscurement 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 de
28、signed to give a flush fit with the outer rim of the containers. 5 Testing of water troughs 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 respectiv
29、e testing station. When issuing contracts for testing, each testing station shall be provided 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 t
30、est procedures, see Annex B. NOTE Other test procedures are under consideration. 5.2 Construction 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
31、When a uniform static load is applied to a stack of water troughs, composed of five containers 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
32、, the containers shall not be wedged together and shall not be damaged. 5.2.3 Water level indicator The minimum water level indicator shall be checked for correct operation and accuracy. The maximum margin of indicator error shall be 5 %. EN 14591-2:2007 (E) 12 5.3 Testing of electrostatic propertie
33、s 5.3.1 Test method The surface resistance shall be tested in accordance 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 As
34、sessment Containers and matching covers, together with all attachments, 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 RoA is less than 109 . 6 Additional fi
35、ttings for water troughs Water troughs may be provided with additional 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
36、covers) shall be marked. An example is given in Annex C. 8 Construction 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
37、 barriers comprise troughs which are filled with water (and, if applicable, 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 barrier
38、s are designated as fixed passive water trough barriers. Water trough barriers 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
39、 comprises two beams or one shelf arranged at right angles to the roadway 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
40、 suspension rods can also be used for this purpose. The framework structures 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 w
41、here necessary using battens. EN 14591-2:2007 (E) 13 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 ro
42、adway diameter) at the point of installation. The achieved 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 b
43、etween the edges of the outer troughs of the trough group 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
44、shall not exceed 1,8 m. The vertical distance between 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
45、 additional trough shall be installed. In this case, 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, indivi
46、dual troughs can be arranged longitudinally (longitudinal 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
47、the troughs in the longitudinal direction if the extinguishing 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 anot
48、her. Troughs which are arranged at a distance of 0,5 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 s
49、hall be kept as small as possible and shall not exceed 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 barriers designed to cordon off the intersection and junction areas. The distance requirements do not apply either between closely-s
