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International Standards for mining

Safety on Machines and

Explosion Protection

Assessor of mines

Dr. Ing. Elmar Fuchs

Germany

Technical Director of VDMA

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Elmar Fuchs

Dr.-Ing. ,Assessor of mines51 years, married, 2 children,

until 2007: Head of Division Safety,

Explosion, fire prevention and

protection, Rescue organisation,ventilation,degassing and climate, DSKAG

since 2004: Director of National,european and international

Standardisation in safety for machines-appreciated specialist for mining

Technical director of VDMA

Manager Geo&Safety Consult

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Courriers 1906 (France)

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European Directives

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EquipmentEquipment means machines, apparatus, fixed or mobiledevices, control components and instrumentation thereof and

detection or prevention systems which, separately or jointly, areintended for the generation, transfer, storage, measurement,control and conversion of energy for the processing of materialand which are capable of causing an explosion through theirown potential sources of ignition.

Protective systems

Protective systems means design units which are intended tohalt incipient explosions immediately and/or to limit the effectiverange of explosion flames and explosion pressures. Protectivesystems may be integrated into equipment or separately placedon the market for use as autonomous systems.

ComponentsComponents means any item essential to the safe functioning

of equipment and protective systems but with no autonomousfunction.

Explosion protection and prevention in mining

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Convenor: Dr. Fuchs, Germany Secretary: Blasgude, DIN/FABERG, Germany

Members: Austria, Czech Republic, France, Germany, Italy, Poland, Spain,Sweden, United Kingdom

Subgroup 1

Explosion barriers in undergroundmines

EN 14591-2:2007-03

Explosion prevention and protectionin underground mines - Protectivesystems - Part 2: Passive watertrough barriers

Subgroup 2Equipment for firedamp drainage forunderground mines

EN 14983:2007-03Explosion prevention and protection inunderground mines - Equipment andprotective systems for firedampdrainage

EN 1127-2:2002-04Explosive atmospheres - Explosion prevention and protection - Part 2: Basicconcepts and methodology in mining

CEN/TC 305/WG 5Equipment and protective systems for mining

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Subgroup 3Extinguishing systems for road

headers

EN 14591-4:2007-07Explosion prevention and protection in

underground mines - Protectivesystems - Part 4: Automaticextinguishing systems for roadheaders

Subgroup 42-bar explosion proof ventilationstructure

EN 14591-1:2004-09Explosion prevention and protectionin underground mines - Protectivesystems - Part 1: 2-bar-explosionproof ventilation structure

Subgroup 5Requirements for machines inpotentially explosive atmospheres inmines

EN 1710:2005-11Equipment and components intendedfor use in potentially explosiveatmospheres in underground mines

CEN/TC 305/WG 5Equipment and protective systems for mining

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Explosion protection for mining in Europe

EN 1127-1 Basic concepts and methodology

EN 1127-2 Basic concepts and methodology for mining

EN 1710Category M2 Equipment

EN 50303Category M1 Equipment

EN 14591-12-bar explosion proof

ventilation structures

EN 14591-2Water trough barriers

EN 14591-4

Extinguishing systems forroad headers

EN 14983Firedamp drainage

EN 13463-1Non-electrical equipment

Basic method

Equipment Protective Systems System Standard

EC-Explosion Protection Directive 94/9/EC (ATEX-Directive)

EC-Machinery Directive 98/37/EG

Prevention of ignition sources Limitation of explosion effects Prevention of potentially

explosive atmospheres

IntegratedExplosion

protection

StatutoryPrinciples

Basic standards

Group standards

and productstandards

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RelationshipEquipment Category Hazardous condition(according to EN 1127-2)

-2 (potentially

explosiveatmosphere)

Firedampand/orflammable dust

M2

2 (potentiallyexplosive

atmosphere)

1 (explosiveatmosphere)

Firedampand/orflammable dust

M1

May be usedalso in

condition

Designed forcondition

Category

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EN 50303CH4-Measuring devices (M1 equipment)

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CO-Messeinrichtung CO-Messeinrichtung

CO- Measuring devices

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CO-measurement

device

CO- and CH4-measurement point

CH4-measurement

device

Monitoring with stationarymeasurements devices in theair flow

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Control of measuring data

in a surface safetycontrol room


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Firefighting withnitrogen inertisation

Full space inertisation

Goaf inertisation

nitrogen tube

airlock 1

airlock 2 airlock 3open fire

2. nitrogen tube (if needed)

goaf

goaf

nitrogen tube

suspectedspon com fire

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Mobile underground combustiblegas analysing system

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Observing the explosion risc with theExplosion diagram of Fuchs/Culmann

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Construction of seals

lD = Seal length

a = Width or height of roadway

(whichever is larger) at the seal

construction site

= Flexural strength of concrete

[ ]mlD

[ ]

[ ]2/7,0

mmN

ma

bz

=

bz

inertisation pipes 150 mm

filling pipe 50 mm

sniffing pipe 50 mmtelephonecable

dewatering pipe(syphon type)

seal pipe 0,7 m

angledfilling pipe50 mm

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Viewing direction from south

(Explosion side)

Viewing direction from north

EN 14591-1 2-bar-explosion proof ventilation structure

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Explosion barriers

Rock-dust explosion barriers are usefulagainst coaldust explosions and are not usedin German coal mines any more

Water explosion barriers are useful againstcoal dust and methane explosions

Water explosion barriers are constructed as

-concentrated barrier (200 l/m roadwaycross-section) in main roadways every400 m

-distributed barrier in gate roadways (1

l/m roadway-volume) equally distributedover the length of roadway

water trough

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EN 14591-2 Water trough barriers

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EN 14591-2 Water distribution

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Explosion protection and prevention in miningExtinguishing System for road headers

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EN 14591-4Automatic explosion extinguishing system

for road headers

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Gasdrainage in the

roof and the bottomof a longwall face

EN 14983: Firedamp-Drainage

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Drilling machine

in a gallery

Borehole

Measurin

Devices

Drainage

tubes

Waterseparator

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CO-Detektor

CH4-Detektor M

CO

CO

CH4-Detektor M

CO-Detektor

Volume Detektor V

Detektor for ventiation volume V

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EN 14983 Firedamp drainage in above ground

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EN 14983 Firedamp drainage station

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ISO/IEC 80079-xx (EN 1710)Equipment and components intended for use in

potentially explosive atmospheres in underground mines

Main Characteristics of the Standard

All types of equipment to be used in undergroundmines with explosive atmospheres have to comply withthis standard

Requirements for both explosion protection and fireprotection (as far as fire can be an ignition source)

Requirements for both non-electric and electricequipment (as far as they are not dealt with in otherstandards)

Ignition hazard assessment has to be carried out forthe whole machine including interconnections, such ascables or electrical supply system

Ignition data has been examined, as a basis for theequipment included in the standard

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ISO/IEC 80079-xx (EN 1710)Equipment and components intended for use in


Content1 Scope2 Normative references3 Terms and definitions

4 Requirements for equipment (machines) and components4.1 General4.2 Ignition hazard assessment

4.3 Non-electrical equipment and components4.4 Electrical equipment and components5 Additional requirements for specific equipment and components5.1 Cutting and stripping equipment5.2 Rope haulages for level and inclined transport5.3 Fans

5.4 Diesel engines5.5 Air compressors5.6 Drilling equipment and components

5.7 Brakes5.8 Traction batteries, starter batteries and vehicle lighting batteries5.9 Optical fibres used on machines and electromagnetic radiation from components on machines

6 Fire protection7 Information for use

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EN 1710

Equipment and components intended for use inpotentially explosive atmospheres in underground mines

Scope

Requirements for the construction and marking ofequipment that may be an individual item or form anassembly. This includes machinery and components

placed on the market by a single supplier for use inmines endangered by firedamp and/or combustibledust.

Prevention of ignitions of explosive atmospheres

caused by burning (or smouldering) of combustiblematerial used in the construction of the equipment ifsuch items could be an ignition source.

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EN 1710Equipment and components intended for use inpotentially explosive atmospheres in underground mines

4 Requirements for equipment (machines) andcomponents

4.1 General

Ignition hazard assessment according toEN 13463-1 (non-electrical) and IEC 60079-0 (electrical)

All electrical and non- electrical equipment and components for

use in a potentially atmosphere shall be designed andconstructed to good engineering practice and in confirmity withrequirements of group I category M2 equipment to ensureavoidance of any ignition source

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EN 1710Equipment and components intended for use in


4 Requirements for equipment (machines) andcomponents

In particular:

restrict the maximum surface temperature

meet the electrostatic requirements

restrict the use of exposed light metals

perform tests on non-metallic parts on which the ignition

protection depends to ensure they will not deteriorate in theconditions of use in mines and cause the protection to be lost

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EN 1710Equipment and components intended for use in


5 Additional requirements for specific equipment and

components

5.1 Cutting and stripping equipment

Requirements for cutting equipment, e.g. shearers,

in particular:

Water spray systems

Air dilution systems

Requirements for stripping equipment, e.g. ploughs

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Shearer

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Plough

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Road header machine

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EN 1710



components

5.4 Diesel engines

5.5 Air compressors

5.6 Drilling equipment and components

5.7 Brakes

5.8 Traction batteries, starter batteries and vehicle lighting

batteries

5.9 Optical fibres used on machines and electromagneticradiation from components on machines

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Drilling platform

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Drilling machine

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Dump loader

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EN 1710



components

5.2 Rope haulages for level and inclined transport

5.3 Fans

Ventilating fans for use underground, in particular

Bifurcated and centrifugal fans

Inlet and outlet cones

Impellers and impeller rings

Clearance

Balancing

Overheating of the fan motor

Materials

Other fans

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Monorail

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Fans for underground

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EN 1710


6 Fire protection6.2 Non-metallic materials

6.3 Internal combustion engines fitted to machines

6.4 Hydraulic and pneumatic equipment

6.5 Additional requirements for cable-reeled machines

6.6 Fire prevention on electric cables that are part of the

machine6.7 Conveyor belts

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Belt conveyor

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IEC SC 31M Working Group AHG-1 Mining equipment

You are cordially invited to participate in the work ofIEC SC 31M AHG-1 Mining equipment.

Next meeting: From 28 to 30 April 2009 in HunterValley, Australia

Overnext meeting: September 2009 Zcech Republic

Contact persons

Dr.Elmar Fuchs, [email protected]

Hans Georg Blasgude, [email protected]

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Thank you for your attention

Glckauf!

e fuchs

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