1、September 2014 Translation by DIN-Sprachendienst.English price group 16No part of this translation 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).
2、ICS 73.100.01; 13.230!%:Q“2235846www.din.deDDIN EN 1127-2Explosive atmospheres Explosion prevention and protection Part 2: Basic concepts and methodology for mining;English version EN 1127-2:2014,English translation of DIN EN 1127-2:2014-09Explosionsfhige Atmosphren Explosionsschutz Teil 2: Grundlag
3、en und Methodik in Bergwerken;Englische Fassung EN 1127-2:2014,Englische bersetzung von DIN EN 1127-2:2014-09Atmosphres explosives Prvention de lexplosion et protection contre lexplosion Partie 2: Notions fondamentales et mthodologie dans lexploitation des mines;Version anglaise EN 1127-2:2014,Tradu
4、ction anglaise de DIN EN 1127-2:2014-09SupersedesDIN EN 1127-2:2010-07www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 38 pages 07.14 DIN EN 1127-2:2014-09 2 A comma is used as the decimal marker. Start of application The start of applic
5、ation of this standard is 2014-09-01. National foreword This standard includes safety requirements. This document (EN 1127-2:2014) has been prepared by Technical Committee CEN/TC 305 “Potentially explosive atmospheres Explosion prevention and protection” (Secretariat: DIN, Germany), Working Group WG
6、 5 “Equipment and protection systems for mining”. The responsible German body involved in its preparation was the Normenausschuss Bergbau (DIN Standards Committee Mining), Working Committee NA 008-07-03 Explosionsschutz. Representatives of manufacturers and users of mining equipment, and of the mini
7、ng authorities contributed to this standard. Amendments This standard differs from DIN EN 1127-2:2010-07 as follows: a) Clause 3 “Terms and definitions” has been revised to be in line with EN 13237; b) Clause 4 “Risk assessment” has been modified; c) the terms “hazardous condition 1” and “hazardous
8、condition 2” have been deleted; d) the standard has been harmonized with EN 1127-1:2011. Previous editions DIN EN 1127-2: 2002-07, 2008-08, 2010-07 DIN EN 1127-2:2014-09 3 National Annex NA (informative) Bibliography DIN 22100-7, Articles and materials from synthetics for use in underground mines Pa
9、rt 7: Safety requirements, testing, marking DIN EN 1710, Equipment and components intended for use in potentially explosive atmospheres in underground mines DIN EN 14591-1, Explosion prevention and protection in underground mines Protective systems Part 1: 2-bar-explosion proof ventilation structure
10、 DIN EN 14591-2, Explosion prevention and protection in underground mines Protective systems Part 2: Passive water trough barriers DIN EN 14591-4, Explosion prevention and protection in underground mines Protective systems Part 4: Automatic extinguishing systems for road headers DIN EN 14983, Explos
11、ion prevention and protection in underground mines Equipment and protective systems for firedamp drainage DIN EN 1127-2:2014-09 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1127-2 June 2014 ICS 13.230; 73.100.01 Supersedes EN 1127-2:2002+A1:2008English Vers
12、ion Explosive atmospheres - Explosion prevention and protection - Part 2: Basic concepts and methodology for mining Atmosphres explosives - Prvention de lexplosion et protection contre lexplosion - Partie 2: Notions fondamentales et mthodologie dans lexploitation des mines Explosionsfhige Atmosphren
13、 - Explosionsschutz - Teil 2: Grundlagen und Methodik in Bergwerken This European Standard was approved by CEN on 7 May 2014. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard w
14、ithout any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any oth
15、er language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic,
16、 Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMM
17、ITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1127-2:2014 EEN 1127-2:20
18、14 (E) 2 Contents Page Foreword 4 Introduction .5 1 Scope 8 2 Normative references 9 3 Terms and definitions 10 4 Risk assessment . 11 4.1 General . 11 4.2 Identification of explosion hazards. 11 4.3 Identification of ignition hazards 11 4.4 Estimation of the possible effects of an explosion . 11 5
19、Possible ignition sources 12 5.1 Hot surfaces 12 5.2 Flames and hot gases (including hot particles) 12 5.3 Mechanically generated sparks . 12 5.4 Electrical equipment . 12 5.5 Stray electric currents 12 5.6 Static electricity 13 5.7 Lightning 13 5.8 Radio frequency (RF) electromagnetic waves from 10
20、4Hz to 3 1011Hz (high frequency) . 13 5.9 Electromagnetic waves from 3 1011Hz to 3 1015Hz . 13 5.10 Ionizing radiation 13 5.11 Ultrasonics 13 5.12 Adiabatic compression and shock waves . 13 5.13 Exothermic reactions, including self-ignition of dusts . 13 6 Risk reduction . 14 6.1 Fundamental princip
21、les . 14 6.2 Avoidance or reduction of explosive atmosphere 14 6.2.1 Process parameters . 14 6.2.2 Design and construction of equipment, protective systems and components containing flammable substances . 16 6.3 Classification of hazardous atmospheric conditions . 16 6.3.1 General . 16 6.3.2 Hazardo
22、us atmospheric conditions 17 6.4 Requirements for the design and construction of equipment, protective systems and components by avoidance of effective ignition sources 17 6.4.1 General . 17 6.4.2 Hot surfaces 18 6.4.3 Flames and hot gases 19 6.4.4 Mechanically generated sparks . 19 6.4.5 Electrical
23、 equipment . 20 6.4.6 Stray electric currents 20 6.4.7 Static electricity 20 6.4.8 Lightning 20 6.4.9 Radio frequency (RF) electromagnetic waves from 104Hz to 3 1011Hz 20 6.4.10 Electromagnetic waves from 3 1011Hz to 3 1015Hz . 21 6.4.11 Ionizing radiation 22 DIN EN 1127-2:2014-09 EN 1127-2:2014 (E)
24、 36.4.12 Ultrasonics . 22 6.4.13 Adiabatic compression and shock waves 22 6.4.14 Exothermic reactions, including self-ignition of dusts . 22 6.5 Requirements for design and construction of equipment, protective systems and components to reduce the explosion effects . 23 6.5.1 General . 23 6.5.2 Spec
25、ial equipment for underground mining. 23 6.6 Provisions for emergency measures 24 6.7 Principles for measuring and control systems for explosion prevention and protection . 24 7 Information for use 24 7.1 General . 24 7.2 Information for commissioning, maintenance and repair to prevent explosion 25
26、7.3 Qualifications and training . 26 Annex A (informative) Relation between categories and hazardous atmospheric conditions . 27 Annex B (normative) Tools for use in potentially explosive atmospheres . 28 Annex C (informative) Significant technical changes between this document and the previous edit
27、ion of this European Standard . 29 Annex ZA (informative) Relationship between this European Standard and the Essential Requirements of EU Directive 94/9/EC 30 Annex ZB (informative) Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC 31 Bibliography
28、 32 DIN EN 1127-2:2014-09 EN 1127-2:2014 (E) 4 Foreword This document (EN 1127-2:2014) has been prepared by Technical Committee CEN/TC 305 “Potentially explosive atmospheres - Explosion prevention and protection”, the secretariat of which is held by DIN. This European Standard shall be given the sta
29、tus of a national standard, either by publication of an identical text or by endorsement, at the latest by December 2014 and conflicting national standards shall be withdrawn at the latest by December 2014. Attention is drawn to the possibility that some of the elements of this document may be the s
30、ubject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 1127-2:2002+A1:2008. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, a
31、nd supports essential requirements of EU Directives. For relationship with EU Directives, see informative Annexes ZA and ZB, which are an integral part of this document. EN 1127, Explosive atmospheres Explosion prevention and protection is composed of the following parts: Part 1: Basic concepts and
32、methodology Part 2: Basic concepts and methodology for mining (the present document) Annex C provides details of significant changes between this document and the previous edition. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are
33、bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Port
34、ugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 1127-2:2014-09 EN 1127-2:2014 (E) 5 Introduction General CEN and CENELEC are producing a series of standards to assist designers, manufacturers and other interested bodies to interpret the essential
35、safety requirements in order to achieve conformity with European legislation. Within this series of standards, CEN has undertaken to draw up a standard to give guidance in the field of explosion prevention and protection, as hazards from explosions are to be considered in accordance with EN ISO 1210
36、0. In accordance with EN ISO 12100, it is a type A standard. Special considerations for mining Explosions can result from: materials processed or used by the equipment and components, e.g. minerals obtained as part of the winning process; materials released by the equipment and components; materials
37、 in the vicinity of the equipment, protective systems and components; materials of which the equipment, protective systems and components are constructed. As the explosion protection of equipment, protective systems and components depends on: the design and construction of the equipment, protective
38、systems and components; the intended use; the foreseeable misuse; the ambient conditions; the materials extracted and handled. This standard also includes safety aspects related to these factors, i.e. it is imperative that the manufacturer consider how and for what the equipment, protective systems
39、and components will be used and take this into account during their design and construction. Only in this way can hazards inherent in equipment, protective systems and components be reduced. NOTE 1 This standard can also serve as a guide for users of equipment, protective systems and components when
40、 assessing the risk of explosion in the workplace and selecting the appropriate equipment, protective systems and components. Mines can be either gassy or non-gassy depending upon the mineral/material being extracted and whether or not firedamp can occur in the workings. It is usual practice to cons
41、ider all coal mines as gassy mines. Non-coal mines can, however, also be susceptible to the occurrence of firedamp, e.g. if minerals/materials are being extracted in the vicinity of oil-bearing strata or unworked coal seams which are disturbed by the extraction process or mines susceptible to outbur
42、sts of flammable gas. In mines where flammable minerals/materials are extracted, there can also be a risk of explosions because small particles of the extracted product can be blown into the air to form dust/air mixtures able to support rapid combustion. Combustible dust can either be an explosion r
43、isk on its own (when in the form of an explosive dust/air mixture), or it can settle in layers which may be blown from the floor and sides of the roadways by a DIN EN 1127-2:2014-09 EN 1127-2:2014 (E) 6 firedamp explosion. In the latter case, the explosive violence can increase many times as more an
44、d more fuel in the form of combustible dust is raised by a blast wave and added to the flame as it travels along the roadways. The risk of an explosive atmosphere occurring and its consequences will therefore vary from mine to mine, depending on the type of mine, its layout, the mineral being extrac
45、ted and the likelihood of firedamp and/or combustible dust occurring. In coal mining, firedamp and coal dust naturally associated with the coal is released by the activity of the miners. Therefore, the potential explosion risk is greater as a result of explosive air/gas or air/dust mixtures forming
46、that cannot be totally excluded by the preventive measures taken. Firedamp/air mixtures are usually diluted by the ventilation and evacuated to the surface via the mine workings so that the gas content in normal operation is kept far below the lower explosion limit. However, as a result of system ma
47、lfunction (e.g. fan failure), sudden release of large gas quantities (gas outbursts) or intensified gas release caused by decreasing air pressure or by increased coal production, the permissible gas concentration thresholds may be exceeded. The explosive atmosphere caused in this way, even though li
48、mited in space and/or time, may cause a hazard not just at its point of origin but also in the escape roads, waste air paths and other connected mine structures in the mine layout. Coal dust/air mixtures are usually neutralized at the dust source by water sprays, dust removal systems on heading machines and/or treating with inert dust in order to reduce the explosive potential. However, an explosion hazard can exist if explosive dust can become airborne, e.g. at transfer points, in
