SIST EN 14983:2007

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Explosion prevention and protection in underground mines - Equipment and protective systems for firedamp drainageProtection contre l'explosion dans les mines souterraines - Appareils et systemes de protection destinés au captage du grisouExplosionsschutz in untertägigen Bergwerken - Geräte und Schutzsysteme zur Absaugung von GrubengasTa slovenski standard je istoveten z:EN 14983:2007SIST EN 14983:2007en;fr;de73.100.203UH]UDþHYDOQDVentilation, air-conditioning and illumination equipment13.230Varstvo pred eksplozijoExplosion protectionICS:SLOVENSKI
STANDARDSIST EN 14983:200701-julij-2007

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14983March 2007ICS 73.100.20 English VersionExplosion prevention and protection in underground mines -Equipment and protective systems for firedamp drainageProtection contre l'explosion dans les mines souterraines -Appareils et systèmes de protection destinés au captagedu grisouExplosionsschutz in untertägigen Bergwerken - Geräte undSchutzsysteme zur Absaugung von GrubengasThis European Standard was approved by CEN on 13 January 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 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, French, 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, Czech 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 STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2007 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14983:2007: E

Installation and use of firedamp drainage system.18 A.1 General.18 A.2 Work on firedamp pipes.18 A.3 Measures to be taken when gas levels fall below or exceed limit values during firedamp drainage.19 A.4 Failure or shutdown of exhausters.19 Annex B (informative)
Monitoring of firedamp drainage system.20 B.1 Examination and inspection by competent persons.20 B.2 Measurement of the drained firedamp mixture and pressure.20 B.2.1 Measurements taken by hand.20 B.2.2 Fixed monitoring equipment.20 B.3 Documentation.21 B.4 Firedamp circuit plan.21 Annex C (informative)
Requirements for location of exhausters.22 Annex D (informative)
Requirements for gas removal equipment for abandoned surface outlets.23 Annex E (informative)
Example for calculation of t90 path.27 E.1 General.27 E.2 Example for calculation of t90-path.27 Annex ZA (informative)
Relationship between this
European
Standard and the Essential Requirements
of EU Directive 94/9/EC.29

Figures Figure 1 —
Example of connection of roof borehole to collector pipe when measurement and control are accessible.9 Figure 2 — Example of connection of roof borehole to collector pipe when measurement and control are not accessible.10 Figure 3 — Example of connection of floor borehole to collector pipe when measurement and control are accessible.11 Figure 4 — Example of connection of floor borehole to collector pipe when measurement and control are not accessible.12 Figure 5 — Example of explosion prevention system for pipelines with one firedamp vent pipe.15 Figure D.1 — Passive gas removal equipment (Type II).25 Figure D.2 — Passive gas removal equipment (Type III).26 Figure E.1 — Schematic arrangement of a t90-path.28 Tables Table D.1 — Requirements for gas removal equipment for abandoned surface outlets.24 Table ZA.1 — Correspondence between the European Standard and Directive 94/9/EC.29

In the mining industry, firedamp is drained from the underground workings of gassy mines, from boreholes and abandoned mine workings to ensure that mine workers are not exposed to the risks associated with the occurrence of an explosive atmosphere at their place of work. In this case, the explosion risk results from unacceptable accumulations of firedamp occurring in the waste areas and cavities left in the in the rock strata after the coal has been extracted from the coal seam. In such cases, the need to drain these accumulations, and the complexity of the drainage system, depends on the amount of firedamp produced by the coal and the likelihood of it occurring in explosive quantities in the mine roadways and coal face. Examples of situations that might cause firedamp to move in dangerous concentrations from the waste area or cavities into the mine roadways: a breakdown of the mine ventilation system or a sudden reduction in the underground atmospheric pressure. National legislation in EU coal mining member countries requires workers to be withdrawn to a safe place if firedamp levels attain a specific nationally defined value in the general body of mine air. Firedamp drainage is therefore often used in gassy mines in an attempt to ensure that the concentration of firedamp in the general body of mine air is kept well below this critical level, even during abnormal situations such as those described above.
Once the accumulations of firedamp have been drained from the affected areas, it is usually discharged to the mine surface, but in some cases it is discharged into the mine return ventilation system. In systems where the firedamp is brought to the mine surface, it is discharged to the atmosphere through an earthed metallic discharge stack or pressurized and delivered to a utilisation system, such as a gas-fired boiler.
In abandoned mines, firedamp drainage is used
¾ to prevent gas pressure building up and gas issuing at the surface in an uncontrolled manner, and ¾ to protect workers at an adjacent nearby mine or ¾ to allow it to be utilized, for example by burning it in a gas-fired boiler to produce heat or to generate electricity.
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