FprEN 14983

SLOVENSKI STANDARD
oSIST prEN 14983:2021
01-november-2021
Preprečevanje eksplozij in zaščita v podzemnih rudnikih - Oprema in zaščitni
sistemi za odvajanje jamskega plina
Explosion prevention and protection in underground mines - Equipment and protective
systems for firedamp drainage
Explosionsschutz in untertägigen Bergwerken - Geräte und Schutzsysteme zur
Absaugung von Grubengas
Prévention de l’explosion et protection contre l’explosion dans les mines souterraines -
Appareils et systèmes de protection destinés au captage du grisou
Ta slovenski standard je istoveten z: prEN 14983
ICS:
13.230 Varstvo pred eksplozijo Explosion protection
73.100.20 Prezračevalna, Ventilation, air-conditioning
klimatizacijska in and illumination equipment
razsvetljevalna oprema
oSIST prEN 14983:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN 14983:2021
oSIST prEN 14983:2021
DRAFT
EUROPEAN STANDARD
prEN 14983
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2021
ICS 73.100.20 Will supersede EN 14983:2007
English Version
Explosion prevention and protection in underground
mines - Equipment and protective systems for firedamp
drainage
Prévention de l'explosion et protection contre Explosionsschutz in untertägigen Bergwerken - Geräte
l'explosion dans les mines souterraines - Appareils et und Schutzsysteme zur Absaugung von Grubengas
systèmes de protection destinés au captage du grisou
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 305.
If this draft becomes a European Standard, 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 without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
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, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 14983:2021 E
worldwide for CEN national Members.

oSIST prEN 14983:2021
prEN 14983:2021 (E)
Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Equipment and protective systems for firedamp drainage . 9
4.1 General . 9
4.2 Borehole standpipes . 9
4.3 Drainage pipes for seals and stoppings .12
4.4 Water separators at drainage points .12
4.5 Firedamp pipes .12
4.5.1 General requirements for firedamp pipes .12
4.5.2 Measuring points for measuring equipment in firedamp drainage pipes .12
4.6 Pressure vessels in firedamp drainage plant .12
4.7 Pressure generators .13
4.7.1 Requirements for pressure generators .13
4.7.2 Reserve pressure generators .13
4.7.3 Location of pressure generators .13
4.8 Venting of the drained firedamp .14
4.9 Flame arresters in pipelines .14
4.9.1 Flame arresters .14
4.9.2 Non-flammable firedamp vent pipe outlets .15
4.9.3 Non-flammable drainage pipe .16
4.9.4 Protection of gas utilization plant .16
4.9.5 Reserve container and operating state .16
4.10 Requirements for the design of electrical safety devices .17
4.11 Electrostatic ignition risks .17
5 Instructions for installation and use .17
Annex A (informative) 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 pressure generators .19
Annex B (normative) 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
oSIST prEN 14983:2021
prEN 14983:2021 (E)
B.2.2 Fixed monitoring equipment. 20
B.3 Documentation . 21
B.4 Firedamp circuit plan . 21
Annex C (normative) Requirements for location of pressure generators . 22
Annex D (normative) Requirements for degassing equipment for abandoned surface
openings . 23
Annex E (informative) Example for calculation of t -path . 27
E.1 General . 27
E.2 Example for calculation of t90-path . 27
Annex F (informative) Significant Changes between this European Standard and
EN 14983:2007 . 29
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Directive 2014/34/EU aimed to be covered . 31
Bibliography . 32

oSIST prEN 14983:2021
prEN 14983:2021 (E)
European foreword
This document (prEN 14983:2021) 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 document is currently submitted to the CEN Enquiry.
This document will supersede EN 14983:2007.
This document has been prepared under a Standardization Request given to CEN by the European
Commission and the European Free Trade Association, and supports essential requirements of EU
Directive(s) / Regulation(s).
For relationship with EU Directive(s) / Regulation(s), see informative Annex ZA, which is an integral part
of this document.
oSIST prEN 14983:2021
prEN 14983:2021 (E)
Introduction
Firedamp drainage is a technical process for selected gas removal, the purpose of which is to reduce the
risks presented by inflammable gas and air mixtures. Firedamp drainage is therefore a measure for
preventive explosion protection.
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 utilization system, such as a gas-fired boiler.
In abandoned mines, firedamp drainage is used
— to prevent gas pressure building up and gas issuing at the surface in an uncontrolled manner, and
— to protect workers at an adjacent nearby mine, or
— to allow it to be utilized, for example by burning it in a gas-fired boiler to produce heat or to generate
electricity.
oSIST prEN 14983:2021
prEN 14983:2021 (E)
1 Scope
This document specifies the requirements for equipment and protective systems for firedamp drainage
at mines. It also contains requirements for the construction and monitoring of this equipment and
protective systems (see EN 1127-2:2014).
This document does not apply to firedamp utilization systems beyond the utilization shut-off device.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 1127-2:2014, Explosive atmospheres - Explosion prevention and protection - Part 2: Basic concepts and
methodology for mining
EN 13237:2012, Potentially explosive atmospheres — Terms and definit
...