EN 12321:2003+A1:2009

Underground mining machinery - Specification for the safety requirements of armoured face conveyors

1.1   This European Standard specifies the safety requirements for armoured face conveyors and covers, conveyor drive units, return units, line pans, chain assemblies, devices for tensioning and locking chains.
This European Standard does not apply to stage loader ancillaries, armoured face conveyors which form part of mineral bunker systems or operate as spillage conveyors, to haulage systems and guides utilised by extraction machines, to the technical requirements for cable-less remote controls, to compressed air powered machines, or to the interfaces between the elements of the conveyor and other machine installations.
Armoured face conveyors are designed for the transport of minerals and rock only.
NOTE   Armoured face conveyors can be used as a base for guiding the extraction machine and as a link between the face roof support and the extraction machine if required.
This European Standard deals with all hazards, hazardous situations and events for the use in mines, when they are used as intended and for the conditions foreseen by the manufacturer.  See clause 4 for the hazards dealt with.
1.2   This European Standard does not cover any hazards resulting from the electrical equipment associated with the machine.  It does not contain any requirements relating to dust suppression or firedamp hazards. Hazards due to noise are also excluded from this European Standard, but a separate European Standard is in preparation where hazards due to noise will be addressed.
It is intended for manufacturers producing and marketing complete machines, and for manufacturers assembling new parts from different origins or assembling new machines even for their own use.  These are called "manufacturers" in this European Standard.
1.3   This European Standard applies to armoured face conveyors which are manufactured after the date of issue of this European Standard.

Bergbaumaschinen unter Tage - Sicherheitsanforderungen an Kettenkratzerförderer

1.1 Diese Europäische Norm legt die Sicherheitsanforderungen für Kettenkratzerförderer fest. Sie umfasst
Antriebseinheiten, Umkehren, Fördererrinnen, Kettenbänder, Kettenspann- und -festsetzvorrichtungen.
Diese Europäische Norm gilt nicht für Streckenfördererzubehör, für Kettenkratzerförderer, die einen Teil von
Mineralbunkersystemen darstellen oder als Feinkohleförderer eingesetzt werden, für Vorschubsysteme und
Führungen, die von Gewinnungsmaschinen verwendet werden, für kabellose Fernsteuerungen, für druckluftbetriebene
Maschinen oder für die Schnittstellen zwischen den Fördererelementen und anderen Maschinenanlagen.
Kettenkratzerförderer sind nur für den Transport von Mineralien und Gestein ausgelegt.
ANMERKUNG Kettenkratzerförderer können bei Bedarf als Basis für die Führung der Gewinnungsmaschine und als
Verbindungsglied zwischen dem Strebausbau und der Gewinnungsmaschine verwendet werden.
Diese Europäische Norm befasst sich mit allen Gefährdungen, Gefährdungssituationen und Gefährdungsereignissen
für den Einsatz im Bergbau bei bestimmungsgemäßer Verwendung und unter den vom Hersteller
vorgesehenen Bedingungen. Die entsprechenden Gefährdungen sind im Abschnitt 4 aufgeführt.
1.2 Diese Europäische Norm gilt nicht für Gefährdungen, die durch die in Verbindung mit der Maschine
eingesetzten elektrischen Ausrüstung ausgelöst werden. Sie enthält keine Anforderungen in Bezug auf
Staubbekämpfung oder Gefährdungen durch Schlagwetter. Gefährdungen aufgrund von Lärm sind von dieser
Europäischen Norm ebenfalls ausgenommen, eine separate Europäische Norm, die sich mit Gefährdungen
aufgrund von Lärm befasst, ist jedoch in Vorbereitung.
Sie ist gedacht für Hersteller, die komplette Maschinen fertigen und vermarkten sowie für Hersteller, die
Maschinen oder Teile von Maschinen unterschiedlicher Herkunft oder Maschinen für ihren Eigenbedarf
zusammenbauen. Diese werden in dieser Europäischen Norm „Hersteller“ genannt.

Machines d'exploitation souterraine - Spécification relative aux prescriptions de sécurité des transporteurs blindés à chaîne á raclettes

1.1 La présente Norme européenne spécifie les exigences de sécurité applicables aux transporteurs blindés
à chaîne à raclettes et couvre les organes moteurs du transporteur, les organes de rappel, les bacs de transport,
les chaînes et les dispositifs de mise en tension et de blocage des chaînes.
La présente Norme européenne ne s’applique pas aux accessoires de convoyeur répartiteur, aux transporteurs
blindés à chaîne à raclettes faisant partie de systèmes de mise en soute de minerai ou fonctionnant comme des
transporteurs à trop-plein, aux systèmes et guides de roulage utilisés par les machines d’extraction, aux exigences
techniques relatives aux commandes à distance, sans câble, aux machines à air comprimé, ni aux interfaces entre
les éléments du transporteur et les autres installations de la machine.
Les transporteurs blindés à chaîne à raclettes sont uniquement conçus pour le transport de minerai et de roches.
NOTE Si nécessaire, les transporteurs blindés à chaîne à raclettes peuvent être utilisés comme base de guidage de la
machine d’extraction et comme liaison entre le soutènement en taille du toit et la machine d’extraction.
La présente Norme européenne couvre tous les phénomènes dangereux, les événements dangereux et les situations
dangereuses engendrés par l’utilisation d’un tel équipement dans les mines lorsqu’il est utilisé comme prévu et dans
les conditions prévues par le fabricant. Voir à l’article 4 tous les risques couverts.
1.2 La présente Norme européenne ne traite pas des risques engendrés par l’équipement électrique associé à la
machine. Elle ne contient aucune exigence liée aux risques engendrés par la suppression de la poussière ou le
grisou. Les risques dus au bruit sont également exclus de la présente Norme européenne mais une Norme
européenne distincte, traitant des risques dus au bruit, est actuellement en préparation.

Stroji za podzemno pridobivanje - Spisek varnostnih zahtev za odkopni transporter

General Information

• Status: Published
• Publication Date: 31-Mar-2009
• Withdrawal Date: 27-Dec-2009
• ICS: 73.100.40 - Haulage and hoisting equipment
• Technical Committee: CEN/TC 196 - Machines for undergroung mines - Safety
• Drafting Committee: CEN/TC 196/WG 5 - Armoured face conveyors
• Current Stage: 9093 - Decision to confirm - Review Enquiry
• Start Date: 10-Jun-2021
• Completion Date: 14-Apr-2025
• Directive: 2006/42/EC - Directive 2006/42/EC of the European Parliament and of the Council of 17 May 2006 on machinery, and amending Directive 95/16/EC (recast)
• Directive: 98/37/EC - Machinery
• Mandate: M/396 - Mandate to CEN and Cenelec for standardisation in the field of machinery
• Mandate: M/BC/CEN/91/1 - Standardization request to CEN/CENELEC concerning machines presenting hazards due to mobility or load lifting
• Ref Project: SIST EN 12321:2004+A1:2009 - Underground mining machinery - Specification for the safety requirements of armoured face conveyors

Relations

• Merged From: EN 12321:2003 - Underground mining machinery - Specification for the safety requirements of armoured face conveyors
• Effective Date: 18-Jan-2023

Overview

EN 12321:2003+A1:2009 is a CEN European Standard that specifies safety requirements for armoured face conveyors used in underground mining (transport of minerals and rock). Prepared by CEN/TC 196, it covers the mechanical elements of armoured face conveyors including drive units, return units, line pans, chain assemblies and devices for tensioning and locking chains. The standard defines hazards addressed, required protective measures, verification and user information for conveyors manufactured after its issue date.

Key topics and requirements

• Scope and exclusions
  • Applies to armoured face conveyors for transporting minerals/rock only.
  • Excludes stage loader ancillaries, conveyors in mineral bunker systems or used as spillage conveyors, haulage systems/guides used by extraction machines, cable-less remote-control technical requirements, compressed-air powered machines, electrical-equipment hazards, dust suppression/firedamp and noise hazards (noise addressed by a separate standard).
• Mechanical safety and guarding
  • Requirements for guarding of moving parts, chain assemblies, sprockets and line pans to prevent crushing, shearing, entanglement and drawing-in hazards.
• Control systems and ergonomics
  • Controls must conform to ergonomic and safety norms (EN 894 series) and be designed to prevent accidental operation.
  • Minimum spacing examples: 50 mm for handles requiring >50 N, 25 mm for handles <50 N, 10 mm between rows of push buttons, 15 mm between separate push buttons.
• Start/stop and warnings
  • Audible pre-start warning required, intended to cover conveyor length; minimum pre-start duration: 5 seconds.
  • Requirements for safe stopping, prevention of unexpected restart, and control-circuit failure measures.
• Hydraulics, thermal and fluid hazards
  • Safety requirements for fluid power systems, hydraulic hoses/pipes and thermal hazards; specifics reference EN 982 and other normative documents.
• Verification and documentation
  • Clause on verification of safety requirements and mandatory user information: instruction handbook, marking and maintenance guidance.
• Hazard listing
  • Detailed list of significant hazards (mechanical, thermal, material-related, ergonomic, etc.) with clause cross-references.

Applications and users

• Intended primarily for:
  • Manufacturers producing complete armoured face conveyors or assembling new machines/components.
  • Safety engineers, OEMs, mine equipment designers, compliance officers and procurement teams specifying underground mining machinery.
• Practical uses:
  • Designing and certifying conveyors to meet EU safety requirements.
  • Preparing risk assessments, operator manuals, conformity documentation and factory acceptance checks.
  • Specifying guarding, controls, hydraulic safety and pre-start warning systems.

Related standards

• EN 292-1 / EN 292-2 (machine safety principles)
• EN 953 (guards)
• EN 982 (fluid power safety)
• EN 1050 (risk assessment)
• EN 894 (controls ergonomics)
• Annexes ZA/ZB describe relationships with EU Machinery Directives (98/37/EC and 2006/42/EC).

Keywords: EN 12321:2003+A1:2009, armoured face conveyors, underground mining machinery, safety requirements, CEN, chain assemblies, line pans, conveyor drive units.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Stroji za podzemno pridobivanje - Spisek varnostnih zahtev za odkopni transporterBergbaumaschinen unter Tage - Sicherheitsanforderungen an KettenkratzerfördererMachines d'exploitation souterraine - Spécification relative aux prescriptions de sécurité des transporteurs blindés à chaîne á raclettesUnderground mining machinery - Specification for the safety requirements of armoured face conveyors73.100.40Oprema za vleko in dviganjeHaulage and hoisting equipmentICS:Ta slovenski standard je istoveten z:EN 12321:2003+A1:2009SIST EN 12321:2004+A1:2009en,fr01-maj-2009SIST EN 12321:2004+A1:2009SLOVENSKI
STANDARDSIST EN 12321:20041DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12321:2003+A1
April 2009 ICS 73.100.40 Supersedes EN 12321:2003English Version
Underground mining machinery - Specification for the safety requirements of armoured face conveyors
Machines d'exploitation souterraine - Spécification relative aux prescriptions de sécurité des transporteurs blindés à chaîne à raclettes
Bergbaumaschinen unter Tage - Sicherheitsanforderungen an Kettenkratzerförderer This European Standard was approved by CEN on 11 March 2003 and includes Amendment 1 approved by CEN on 24 February 2009.
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. Up-to-date lists and bibliographical references concerning such national standards 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 translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official 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 STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12321:2003+A1:2009: ESIST EN 12321:2004+A1:2009

!!!!Relationship between this European Standard and the Essential Requirements of EU Directive 98/37/EC"""" . 18 Annex ZB (informative)
!!!!Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC"""" . 19 Bibliography . 20
This document (EN 12321:2003+A1:2009) has been prepared by Technical Committee CEN /TC 196 "Machines for underground mines - Safety", the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by October 2009, and conflicting national standards shall be withdrawn at the latest by December 2009. This document includes Amendment 1, approved by CEN on 2009-02-24. This document supersedes EN 12321:2003. The start and finish of text introduced or altered by amendment is indicated in the text by tags !". This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). !For relationship with EU Directive(s), see informative Annexes ZA and ZB, which are integral parts of this document." Annex A is informative. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: 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.
1 Scope 1.1 This European Standard specifies the safety requirements for armoured face conveyors and covers, conveyor drive units, return units, line pans, chain assemblies, devices for tensioning and locking chains. This European Standard does not apply to stage loader ancillaries, armoured face conveyors which form part of mineral bunker systems or operate as spillage conveyors, to haulage systems and guides utilised by extraction machines, to the technical requirements for cable-less remote controls, to compressed air powered machines, or to the interfaces between the elements of the conveyor and other machine installations. Armoured face conveyors are designed for the transport of minerals and rock only.
NOTE Armoured face conveyors can be used as a base for guiding the extraction machine and as a link between the face roof support and the extraction machine if required. This European Standard deals with all hazards, hazardous situations and events for the use in mines, when they are used as intended and for the conditions foreseen by the manufacturer.
See clause 4 for the hazards dealt with. 1.2 This European Standard does not cover any hazards resulting from the electrical equipment associated with the machine.
It does not contain any requirements relating to dust suppression or firedamp hazards. Hazards due to noise are also excluded from this European Standard, but a separate European Standard is in preparation where hazards due to noise will be addressed.
It is intended for manufacturers producing and marketing complete machines, and for manufacturers assembling new parts from different origins or assembling new machines even for their own use.
These are called “manufacturers” in this European Standard.
1.3 This European Standard applies to armoured face conveyors which are manufactured after the date of issue of this European Standard. 2 Normative references This European Standard incorporates by dated or undated references, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). EN 292-1:1991, Safety of machinery — Basic concepts, general principles for design —
Part 1: Basic terminology, methodology. EN 292-2:1991, Safety of machinery — Basic concepts, general principles for design —
Part 2: Technical principles and specifications. EN 457, Safety of machinery — Auditory danger signals — General requirements, design and testing (ISO 7731:1986, modified). EN 547-3, Safety of machinery — Human body measurements — Part 3: Anthropometric data. EN 563, Safety of machinery - Temperatures of touchable surfaces – Ergonomics data to establish temperature limit values for hot surfaces. EN 894-1, Safety of machinery — Ergonomics requirements for the design of displays and control actuators — Part 1: General principles for human interactions with displays and control actuators. EN 894-2, Safety of machinery — Ergonomics requirements for the design of displays and control actuators — Part 2: Displays. SIST EN 12321:2004+A1:2009

EN ISO 8030, Rubber and plastic hoses — Methods of test for flammability (ISO 8030:1987) ISO 3864, Safety colours and safety signs. ISO 6805, Rubber hoses and hose assemblies for underground mining — Wire-reinforced hydraulic types for coal mining — Specification. 3 Terms and definitions For the purposes of this European Standard, the following terms and definitions, together, where appropriate, with those given in EN 1070:1998 apply: 3.1 armoured face conveyor conveying device used to transport mineral and rock in a steel plate line pan by means of the scrapers of a chain assembly 3.2 conveyor drive assembly comprising drive frame, sprocket gearbox, coupling and motor 3.3 return unit assembly comprising frame and sprocket 3.4 chain assembly comprising of scrapers and link chain 3.5 sprocket drive element which can transmit motor torque and the resulting movement to the chain assembly 3.6 scraper element in the chain assembly which pushes conveyed rock and mineral 3.7 tensioning device means of tensioning the chain assembly SIST EN 12321:2004+A1:2009

EN 1050:1996
annex A Hazards according to EN 1050:1996 annex A Relevant clause/subclause of this standard
1 Mechanical hazards due to:
5.9.2 5.6.1, 5.10, 5.2.1, 5.3.2
5.7, 5.9.2
5.11.1
- machine parts or workpieces, e.g.:
a) shape;
b) relative location;
c) mass and stability;
d) mass and velocity (kinetic energy of elements in controlled or uncontrolled motion);
e) inadequacy of mechanical strength; 1.1 Crushing hazard 5.2, 5.3, 5.8, 5.9.1, 5.10, 5.11.1, 5.11.2 1.2 Shearing hazard 5.2, 5.3, 5.8, 5.10, 5.11.1, 5.11.2 1.3 Cutting or severing hazard 5.2, 5.3, 5.8, 5.10, 5.11.1, 5.11.2 1.4 Entanglement hazard 5.2, 5.3, 5.8, 5.10, 5.11.1, 5.11.2 1.5 Drawing-in or trapping hazard 5.2, 5.3, 5.8, 5.10, 5.11.1, 5.11.2 1.6 Impact hazard 5.2, 5.3, 5.7, 5.9, 5.10, 5.11.1, 5.11.2 1.8 Friction or abrasion hazard 5.2, 5.3, 5.11.1 1.9 High pressure fluid injection hazard 5.5.3, 5.6.1 2 Electrical hazard due to:
2.1 Contact of person with live parts (direct contact) 5.8 3 Thermal hazards, resulting in:
3.1 Burns and scalds by contact with objects or materials with an extreme high or low temperature, by flames or explosions and also by the radiation of heat sources 5.4, 5.5.3, 5.8, 5.10 7 Hazards generated by materials and substances (and their constituent elements) processed or used by the machinery
7.1 Hazards from contact with or inhalation of harmful fluid, gases, mists, fumes and dusts 5.5.2, 5.8, 5.10 7.2 Fire or explosion hazard 5.4 8 Hazards generated by neglecting ergonomic principles in machinery design, e.g. hazards from:
annex A Hazards according to EN 1050:1996 annex A Relevant clause/subclause of this standard 8.1 Unhealthy postures or excessive effort 5.1.2, 5.6.2, 5.9.1, 5.9.2 8.6 Human error 5.1.2, 5.9.2 8.7 Inadequate design, location or identification of manual controls 5.1.2 8.8 Inadequate design or location of visual display units 5.1.2 10 Unexpected start-up/over-run/over-speed (or any similar malfunction) from:
10.2 Restoration of energy supply after an interruption 5.2 11 Impossibility of stopping the machine in the best possible conditions 5.3.4 14 Failure of the control circuit 5.3 15 Errors of fitting 5.9.2 17 Falling or ejected objects or fluids 5.7, 5.9.2 18 Loss of stability/overturning of machinery 5.9.1 19 Slip, trip and fall of persons (related to machinery) 5.5.3 Additional hazards, hazardous situations and hazardous events due to mobility 22 Due to the control system:
22.1 Inadequate location of manual controls 5.3.2 23 From handling the machine (lack of stability)
25 From/to third persons:
25.1 Unauthorised start-up/use 5.2.4, 5.2.2, 5.3.3 25.2 Drift of a part away from its stopping position 5.3.4 25.3 Lack or inadequacy of visual or acoustic warning means 5.2 26 Insufficient instructions for the driver/operator 5.4 Additional hazards due to underground work 30 Mechanical hazards/events due to:
32 Fire and explosion 5.4, 5.6.1
5 Safety requirements/protective measures 5.1
General 5.1.1 Initial requirements The extent to which hazards are covered is indicated in the scope of this standard. In addition machinery shall conform to EN 292-1 and EN 292-2 for hazards which are not covered by this standard.
For the application of EN 457, EN 953 and EN 982 the manufacturer shall carry out an adequate risk assessment for the requirements thereof where choice is necessary.
NOTE This specific risk assessment is part of the general risk assessment relating to the hazards not covered by this C standard.
5.1.2 Control systems Control devices shall be designed, arranged and marked in accordance with EN 894 and have dimensions conforming to EN 547-3 so that they can be operated easily and safely. Minimum distances shall be as follows: SIST EN 12321:2004+A1:2009

a) 50 mm for operating handles that require a force of > 50 N; b) 25 mm for operating handles that require a force of < 50 N; c) 10 mm between rows of push buttons or switches; d) 15 mm between separate push buttons; Control devices shall be designed such that intentional human action is needed.
Control devices shall be so designed, arranged or protected that they cannot be operated accidentally, which could lead to a hazardous situation.
5.2 Starting 5.2.1 Pre-start warning The armoured face conveyor shall be provided with audible pre-start warning systems conforming to EN 457. The intention is that the warning shall be provided throughout the intended length of the conveyor (see also clause 0, Introduction, on negotiation).
The pre-start warning shall last for a minimum of 5 seconds after which time the machine can start. The warning shall c
...