Coal Mining Safety & Health Act 1998 by 3N6fE53

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									                                                     COAL MINING
        SAFETY & HEALTH REGULATION 2000

                                                     CHAPTER 4

        UNDERGROUND REGULATION

C:\TECHSERVICES FILES\LEGISLATION\UGROUNDREGS1.PPT
                                                             Roger Bancroft Deputy Chief Inspector of Mines (Technical)   1
               CONCEPTS
   APPLIES TO UNDERGROUND WORKINGS AND
    ANYTHING CONNECTED TO UNDERGROUND
    WORKINGS

      BELT CONVEYORS


      MAIN FAN STRUCTURES


      ELECTRIC CABLES


      MONITORING EQUIPMENT
                                          2
MAJOR DIFFERENCES TO 1925 REGULATIONS

   EXPLOSION RISK ZONES

   PROVISION OF METHANE DETECTORS

   STONEDUSTING

   USE OF ALUMINIUM
   WELDING

   INSPECTIONS
   POTENTIAL INRUSHES

   ESCAPEWAYS

   FIREFIGHTING

   FAILURE OF MAIN FAN

   USE OF AUXILIARY FANS
                                        3
               EXPLOSION RISK ZONES
Risk assessment required to determine location and types of
Explosion Risk Zones
   TYPES
   ERZ0 -
            any place where methane is or could be greater
              than 2%
   ERZ1
            any place where methane is or could be between
              0.5% and 2%
   NERZ
            any place where methane is less than 0.5%
                                                          4
                   EXPLOSION RISK ZONES
ERZ1
The mine or any part where it is known or assessed that methane could be present in
the general body of the atmosphere in concentrations ranging from 0.5 to 2 percent

PLUS following places


where coal or other material is being mined
within goaf areas
where ventilation is not being provide to meet the required standards
where connections to or repairs to methane drainage ranges are being made
where drilling for exploration or seam drainage is taking place.
Inbye side of inbye rib of last line of cuthroughs
all of those places that are on the return side of the above
                                                                                  5
   PROVISION OF AUTOMATIC METHANE DETECTORS 1

  Equipment Item or Location                    Required Detection Arrangements

Continuous Miner or Coal       Either one or two automatic methane detectors.
Cutter
Mobile Bolting Machine         One automatic methane detector.
Tunnelboring or Roadheading    Either one or two automatic methane detectors
Machine
Longwall Shearer               One automatic methane detector

Longwall Face /Gate Road       One automatic methane detector.
Return Junction
Longwall Face /Gate Road       One automatic methane detector.
Intake Junction
Electrically Powered Loader    Either provided with one automatic methane detector or
                               the operating location must be periodically inspected by
                               a person using a portable detector.


                                                                                          6
        PROVISION OF AUTOMATIC METHANE DETECTORS 2
Equipment Item or Location                      Required Detection Arrangements

Battery or internal combustion    Until 1January 2006 may be either provided with one automatic
engine powered explosion-         methane detector or the operating location must be periodically
protected load-haul dump unit     inspected by a person using a portable detector. After 1 January
constructed prior to 1 January    2006 one automatic methane detector must be fitted.
2001.
Battery or internal combustion    One automatic methane detector.
engine powered explosion-
protected load-haul dump unit
constructed after 1 January
2001.
Explosion protected battery or    Either provided with one automatic methane detector or the
internal combustion engine        operating location must be periodically inspected by a person
powered vehicle other than a      using a portable detector.
load-haul dump unit.
Non-explosion protected battery   Either provided with one automatic methane detector or the
or internal combustion engine     operating location must be periodically inspected by a person
powered vehicle.                  using a portable detector.

                                                                                                     7
  PROVISION OF AUTOMATIC METHANE DETECTORS 3

Equipment Item or Location       Required Detection Arrangements

Other non-intrinsically safe     Either provided with one automatic methane
explosion protected electrical   detector or the operating location must be
equipment.                       periodically inspected by a person using a
                                 portable detector.

Auxiliary Exhausting Fan         One automatic methane detector.

Booster Fan                      One automatic methane detector.

Interface of a NERZ and an       One automatic methane detector in each intake
ERZ1                             at the interface between the zones.




                                                                                 8
METHANE DETECTORS- RESPONSE LEVELS                                                          1
          Equipment Item or           Methane Level                    Action to be Taken
           Location Details             Detected
 Continuous Miner, Coal Cutter,         1.00%         Detector must provide machine operator with an
 Longwall Shearer, Tunnelboring                       audible and visual alarm to indicate that methane
 Roadheading or Mobile Bolting                        is present.
 machine fitted with either one or
 two automatic methane detectors.
 Continuous Miner, Coal Cutter,         2.00%         Detector must automatically trip power to the
 Tunnelboring or Roadheading                          trailing cable supplying power to the equipment.
 machine fitted with one automatic
 methane detector located to detect
 methane near the cutters.
 Continuous Miner, Coal Cutter,       2.00% near      Detector must automatically trip power to the
 Tunnelboring or Roadheading            cutters       cutters.
 machine fitted with two automatic
 methane detectors, one located to
 detect methane near the cutters
 and the other to detect general
 body concentrations around the
 machine.
                                        2.00% in   Detector must automatically trip power to the
                                      general body trailing cable supplying power to the equipment.
                                         around
                                       equipment


                                                                                                          9
METHANE DETECTORS- RESPONSE LEVELS                                          2
    Equipment Item or        Methane Level              Action to be Taken
      Location Details          Detected
Mobile Bolting Machine      2.00% in general Detector must automatically trip power
                              body around    to the trailing cable supplying power to
                               equipment     the equipment.

Longwall Shearer            1.25% in general   Detector must automatically trip power
                              body around      to the cutters.
                               equipment
                            2.00% in general   Detector must automatically trip power
                              body around      to the trailing cable supplying power to
                               equipment       the equipment.

Longwall Face /Gate Road 2.00% in general Detector must automatically trip power
Return Junction            body around    to the cables supplying power to the
                            equipment     equipment at the Gate Road Return
                                          Junction and return side of it.

Longwall Face /Gate Road 2.00% in general Detector must automatically trip power
Intake Junction            body around    to the cables supplying power to all
                            equipment     longwall equipment.


                                                                                          1
         METHANE DETECTORS- RESPONSE LEVELS 3
     Equipment Item or          Methane Level                    Action to be Taken
       Location Details            Detected
Battery      or       internal 1.00% in general   Detector must provide visual and audible alarm and
combustion engine powered        body around      operator must immediately withdraw equipment to
explosion protected vehicle of    equipment       location where methane concentration is less than
any type fitted with one                          1.00%.
automatic methane detector.
                               1.25% in general   Detector must immediately shut down the internal
                                 body around      combustion engine and / or electrical motors.
                                  equipment
Battery      or       internal   1.00% in the     Operator must immediately withdraw equipment to
combustion engine powered        general body     location where methane concentration is less than
explosion protected vehicle of      around        1.00%.
any type constructed prior to     equipment
1 January 2001 and not fitted
with one automatic methane
detector.
                               1.25% in general   Operator must immediately manually shut down
                                 body around      the internal combustion engine and / or electrical
                                  equipment       motors.


                                                                                                       1
 METHANE DETECTORS- RESPONSE LEVELS 4
      Equipment Item or          Methane                 Action to be Taken
       Location Details           Level
                                 Detected
Battery or internal combustion    0.25%     Detector must provide visual and audible
engine powered non-explosion                alarm and operator must immediately
protected vehicle of any type               withdraw equipment to location where
fitted with one automatic                   methane concentration is less than 0.25%.
methane detector.
                                  0.50%     Detector must immediately shut down the
                                            internal combustion engine and / or electrical
                                            motors.
Battery or internal combustion    0.25%     Operator    must       immediately withdraw
engine powered non-explosion                equipment to location where methane
protected vehicle of any type               concentration is less than 0.25%.
and not fitted with one
automatic methane detector.
                                  0.50%     Operator must manually immediately shut
                                            down the internal combustion engine and / or
                                            electrical motors.
Locations in the mine where       0.5%      Welding operator must immediately shut down
welding and hot work is                     operations and quench any hot material where
undertaken.                                 methane concentration is greater than 0.50%.
                                                                                             1
 METHANE DETECTORS- RESPONSE LEVELS 5

     Equipment Item or            Methane                 Action to be Taken
      Location Details             Level
                                  Detected
Other non-intrinsically safe       2.00%     Detector must automatically trip power to the
explosion protected electrical               trailing cable supplying power to the
equipment fitted with one                    equipment.
automatic methane detector.
Other non-intrinsically safe       1.25%     Person detecting methane must immediately
explosion protected electrical               manually trip power to the trailing cable
equipment not fitted with one                supplying power to the equipment.
automatic methane detector.
Auxiliary Exhausting fan          1.25% in Detector must automatically trip power to the
fitted with one automatic          general   trailing cable supplying power to the fan.
methane detector.                   body
                                   around
                                 drive motor




                                                                                             1
      METHANE DETECTORS- RESPONSE LEVELS 6
     Equipment Item or           Methane Level                       Action to be Taken
      Location Details              Detected
Booster fan fitted with one     1.25% in general      Detector must automatically initiate alarms
automatic methane detector.    body around drive      and actions in accordance with the operational
                                     motor            protocols established for the fan.

Main fan fitted with one             An such          Detector must automatically initiate alarms
automatic methane detector.     concentrations as     and actions in accordance with the operational
                                  defined in the      protocols established for the fan.
                              operational protocols
                                    for the fan
A ventilation split or main           At such         Detector must automatically initiate alarms
return airway monitored by      concentrations as     and actions in accordance with the operational
one    automatic    methane       defined in the      protocols established for the mine.
detector.                     operational protocols
                                   for the mine
An interface of a NERZ and            0.25%           Detector must provide visual and audible
an ERZ1 monitored by an                               alarm.
automatic methane detector.
                                     0.50%            Detector must automatically trip power supply
                                                      to all non-intrinsically safe circuits installed in
                                                      the ERZ1 and any NERZ or sub-NERZ zone.

                                                                                                            1
  PROPOSED BORD AND PILLAR METHANE MONITORING
AUTOMATIC
DETECTORS



   Pillars 50m long

                       9                   8                   7                   6




                      Explosion risk zone 1 - all returns and every road on intake side of any point
                      likely to have above 0.5 % CH4+ inbye the inbye rib of last cuthrough
                                                                                                       1
              PROPOSED METHANE MONITORING ON LONGWALLS




                       A.F.C.
                                                   ERZ1


                        SHEARER
        Supports




AUTOMATIC DETECTORS                                 BOUNDARIES OF ERZ1 ZONES TO BE MARKED
                          Typical Longwall panel
                                                                                        1
          AUTOMATIC MONITORS FOR MINE

IF FACE MONITORS TRIP AT > 0.5% POWER GOES OFF TO
1st OUTBYE MONITORS OR SURFACE UNLESS 2ND SET
OF MONITORS INSTALLED OUTBYE

             GOAF




                                   1st OUTBYE MONITORS




             FACE MONITORS
                                                         8
                                                         1
            STONEDUSTING REQUIREMENTS
• NO REQUIREMENT FOR WATER OR STONE DUST
 BARRIERS

• SYSTEM MUST BE DEVELOPED FOR MINIMISING
 PRODUCTION OF AIRBORNE DUST

• SYSTEM MUST BE DEVELOPED FOR DETERMINATION OF
 AIRBORNE DUST PRODUCTION RATE AND AMOUNT OF
 STONE DUST OR OTHER INHIBITOR NEEDED TO
 PREVENT EXPLOSION
                                                  1
                        STONEDUSTING REQUIREMENTS

    Requirement                                              Mine Location Zones

                     All panel           Pillar cross-cuts   All roadways and    All other return Other       intake
                     roadways in a       and longwall        cut-throughs in a   roadways and cut- roadways and cut-
                     200 metre zone      roadways in a       200 metre zone at   throughs.         throughs.
                     outbye last         200 metre zone      start of panel.
                     completed line of   within 400
                     cut-throughs.       metres of the
                                         face.
 % non-                     85                   85                 80                  80                70
 combustibles in
 roadway dust
 sample

 Sample collection
 frequency

 Spot samples            Weekly               Weekly

 Strip samples           Monthly             Monthly             Monthly             Monthly           3 Monthly




INBYE LAST CUTHROUGH - EVERY 24HOURS IF GREATER THAN 50M ADVANCE
                                                                                                                       1
                      STONEDUSTING REQUIREMENTS
   PANEL PILLARS 50M LONG



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                         LONGWALL PILLARS 100M LONG




                    85% incombustibles
                    80% incombustibles
                    70% incombustibles
                                                          8
                                                          2
            USE OF ALUMINIUM
   Exposed aluminium alloy must not be used
    underground if it contains more than 6 percent of
    magnesium and titanium

   External rotating or reciprocating parts not to
    contain more than 0.6 percent magnesium and
    titanium

   A mine must establish and implement controls for
    the storage, transport, handling, use and disposal of
    alloy objects and equipment used underground.

   The controls are to take into account the fact that
    accumulation of alloy dust can be explosive or
    combustible.
                                                            2
                     WELDING 1
Welding in Areas other than a Permanent Workshop


 NO WELDING IN ANY AREA WHERE FLUSHING OF METHANE
  GREATER THAN 0.5% CANNOT BE CONTROLLED.

 WELDING TO STOP IF MORE THAN 0.5% METHANE.

 WELDING AND HOT WORK MUST BE AUTHORISED BY THE
  MANAGER.

 A RISK ASSESSMENT MUST BE CARRIED OUT BEFORE WELDING

 FIRE WATCH MUST BE POSTED DURING AND AFTER THE WORK
  IS COMPLETED.
                                                         2
                      WELDING 2
Welding in Areas other than a Permanent Workshop

 WELDING TO BE SUPERVISED BY PERSON WITH 1st, 2nd OR
  DEPUTY’S CERTIFICATE

 THE AREA MUST BE STONE DUSTED TO AT LEAST 80 PERCENT
  ON ALL ROADWAYS

 ONLY PERSONS INVOLVED ALLOWED IN THE VENTILATION
  SPLIT

 ACCURATE AND ADEQUATE RECORDS MUST BE KEPT

 AN INSPECTOR MUST BE NOTIFIED WITHIN 7 DAYS.

                                                         2
                       WELDING 3
Welding or Hot Work in a Permanent Underground Workshop

PERMANENT UNDERGROUND WORKSHOP ONLY ALLOWED IN A NERZ
 ZONE.

WELDING TO BE CARRIED OUT WHERE METHANE MAINTAINED AT
 LESS THAN 0.5 PERCENT.

WELDING MUST STOP WHERE METHANE IS GREATER THAN 0.5
 PERCENT.

WELDING TO BE SUPERVISED BY PERSON WITH 1st, 2nd OR DEPUTY’S
 CERTIFICATE

MINE MUST ESTABLISH AND IMPLEMENT CONTROLS FOR THE
 CONSTRUCTION, MAINTENANCE AND OPERATION OF A PERMANENT
 UNDERGROUND WORKSHOP.
                                                                2
                       INSPECTIONS 1
     At each mine a schedule for regular periodic inspections of
     the various zones of the mine workings must be determined,
     having regard to the types of activities and potential hazards
     in those zones.
   Standard Operating Procedures for Inspections
    Matters that must be considered include:
     the types of activities taking place and potential hazards in
     the various zones to be inspected;


          the required frequency of inspections to ensure safety;
          who will conduct inspections, and
          the competencies required for persons conducting
            inspections.
                                                                      2
                      INSPECTIONS 2
Standard operating procedures governing the conduct of
 inspections to be developed must include the following
 procedures:
       carrying out of inspections
       who must carry them out inspections
       competencies of persons undertaking inspections
       things and matters that must be inspected
       time intervals between successive inspections;
       rectification of any unsafe matters determined by
        inspections;
       reporting the results of inspections as required by the
        regulations;
       closing entry to dangerous parts of the mine and/or
        removing persons from such places; and
       workforce understanding the purpose of the inspections
        and associated reports
       defining their responses to results of inspections
                                                                  2
                 INSPECTIONS 3
STANDARD FOR INSPECTION OF MINE WORKINGS
CONTAINS THREE SECTIONS

     PART A - DEALS WITH GENERAL INSPECTION
               MATTERS

     PART B - DEALS WITH SOP’s AND SCHEDULING
               OF INSPECTIONS

     PART C -IS A DEFAULT INSPECTION REGIME IF
               NO SOP’S AND INSPECTION ZONES
               DETERMINED

                                                  2
                                INSPECTIONS 4
                                  Conduct of Inspections
At a mine, inspections of the workings must be carried out in accordance with either:

          Parts A and B of the Standard for Inspection of Mine Workings; or
          Parts A and C of the Standard for Inspection of Mine Workings.

          Standard Operating Procedures must be developed in relation to inspections
           and other matters arising from them.

          Sufficient competent persons must be appointed to carry out required
           inspections within the time intervals defined for the inspections.

          A person appointed to conduct an inspection may also have other assigned
           duties but those other duties must not impede the person's ability to conduct
           the required inspection in a thorough and timely manner.
                                                                                           2
                 INSPECTIONS 5
Conduct of Inspections

Who May Conduct an Inspection
A person conducting an inspection required under the
Regulations must:
be appointed for that purpose; and
      have the competencies and skills necessary to
        enable him to make adequate and accurate
        assessments of the conditions of safety of the
        workings being inspected.
                                                         2
                    INSPECTIONS 6
INSPECTION DISTRICTS

•     MINE MUST BE DIVIDED INTO INSPECTION DISTRICTS

•     BOUNDARIES OF DISTRICTS MUST BE CLEARLY DEFINED

•     PERSON APPOINTED UNDER SECTION 60(9) OF ACT MAY

      HAVE CONTROL OF ONE OR MORE ERZ1 ZONES(ADJACENT)

•     DEPUTY MUST BE IN ZONE IF PRODUCTION TAKING PLACE-

      PRODUCTION CAN CONTINUE IF DEPUTY INSPECTION

      ADJACENT ERZ0 ZONE


                                                           3
                   POTENTIAL INRUSHES
MINE MUST DETERMINE BY RISK ASSESSMENT ANY SOURCE OF
 INRUSH FROM ANY DIRECTION AND ANY DISTANCE THAT COULD
 AFFECT MINE WORKINGS
        DETAILS MUST BE KEPT OF
               Location and nature of the inrush source.
               Nature and thickness of the strata, measured in any
                plane that separates the inrush source from the
                workings that could be affected.
               presence of any faults, dykes or boreholes in that
                separating strata.
               Any other relevant data.

   SOP MUST BE IMPLEMENTED TO DEMONSTRATE THAT METHOD OF
    WORKING REDUCES RISK FROM INRUSH TO ACCEPTABLE LEVELS
   SOP MUST BE KEPT UP TO DATE AND PROMINENTLY DISPLAYED
                                                                      3
                 ESCAPEWAYS 1
 AT LEAST TWO SEPARATE TRAFFICABLE ENTRANCES FROM
  THE SURFACE.

 FROM ERZ1 ZONE MUST HAVE TWO DIFFERENT WAYS OF
  ESCAPE TO THE SURFACE OR A PLACE OF REFUGE.

 TWO SEPARATE INTAKE AIRWAYS MUST BE PROVIDED
  EXCEPTING FOR SINGLE PRODUCTION UNIT.

 DOES NOT APPLY TO ANY INDIVIDUAL ENTRY IN THE COURSE
  OF BEING DRIVEN.

 PRIMARY ESCAPEWAYS
 AT LEAST ONE OF THE ESCAPEWAYS MUST BE AN INTAKE
  AIRWAY AND NAMED THE PRIMARY ESCAPEWAY.


                                                         3
                ESCAPEWAYS 2

 THE PRIMARY ESCAPEWAY MUST BE SEGREGATED FROM ALL
  OTHER ROADWAYS BY SEGREGATION CONTROL DEVICES.

 PRIMARY ESCAPEWAY DRIVEN AFTER REGULATION
  COMMENCES MUST BE TRAFFICABLE BY MECHANISED
  EQUIPMENT UNLESS IT IS A DEVELOPMENT DRIVEN WITH
  TWO HEADINGS TO SERVICE A SINGLE PRODUCTION
  DISTRICT.

 THE PRIMARY ESCAPEWAY MUST, AS FAR AS PRACTICABLE,
  BE FREE FROM THE RISK OF FIRE AND INCLUDE FIRE
  SUPPRESSION EQUIPMENT ON OR ADJACENT TO ANY
  EQUIPMENT

                                                       3
                      ESCAPEWAYS 3


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RETURNS                                              E

INTAKES
PRIMARY ESCAPEWAYS




             LONGWALL PILLARS 100M LONG




                              SUBSTANTIAL AIRTIGHT
                              STOPPINGS
                                                         8
                                                         3
                         FIREFIGHTING 1
 RISK ASSESSMENT PROCESS MUST BE CARRIED OUT TO IDENTIFY ALL POTENTIAL
  FIRE HAZARDS AT THE MINE.

 MUST BE PROVIDED AT THE MINE AT ALL TIMES, SUITABLE AND SUFFICIENT MEANS
  TO EXTINGUISH ANY FIRE TYPE IDENTIFIED BY THE RISK ASSESSMENT.

 NO BUILDING OR STRUCTURE LOCATED IN ANY UNDERGROUND MINE, MUST BE
  CONSTRUCTED OF ANY FLAMMABLE MATERIAL WHICH MAY CAUSE DANGER FROM
  FIRE

 MUST BE APPOINTED AT EVERY UNDERGROUND COAL MINE ONE OR MORE FIRE
  OFFICERS WHO MUST BE RESPONSIBLE FOR:

     INSPECTIONS, TESTING AND MAINTENANCE OF FIRE FIGHTING EQUIPMENT
     KEEPING INSPECTION, TESTING AND MAINTENANCE RECORDS
     IDENTIFYING TRAINING NEEDS AND IMPLEMENTING TRAINING PROGRAMS
     ENSURING THE CURRENCY OF FIRE FIGHTING PLANS AND PROCEDURES;
     ENSURING THAT THE EMERGENCY COMMUNICATION SYSTEM IS OPERATING.
                                                                             3
                      FIREFIGHTING 2
   ALL FIRE FIGHTING EQUIPMENT AND APPARATUS MUST BE
    COMPATIBLE THROUGHOUT THE MINE
   PORTABLE FIRE FIGHTING EXTINGUISHERS MUST BE LOCATED ON
    OR NEAR ALL EQUIPMENT AND INSTALLATIONS IDENTIFIED BY
    RISK ASSESSMENT
   SOP’s FOR ACTION IN EVENT OF FIRE TO BE DEVELOPED AND
    DISPLAYED
   MINE MUST DISPLAY A FIRE FIGHTING PLAN IN A SUITABLE
    POSITION ON THE SURFACE
   PLAN MUST BE REVISED AT REGULAR INTERVALS TO ENSURE THAT
    THE INFORMATION ON THE PLAN IS KEPT CURRENT

                                                              3
              HOT WORK (HEAT STRESS)
 IF WET BULB TEMPERATURE EXCEEDS 270 C, MINE MUST
   IMPLEMENT A SYSTEM TO ENSURE THE HEALTH OF PERSONS.

 PERSON MUST NOT WORK WHERE THE EFFECTIVE
   TEMPERATURE EXCEEDS 29.40 C
EXCEPT

     IN THE EVENT OF ESCAPE IN AN EMERGENCY: OR
     WHERE A PERSON IS ENGAGED IN WORK DESIGNED TO REDUCE THE
    EFFECTIVE TEMPERATURE OF A WORKING PLACE: OR
     IS WORKING IN ACCORDANCE WITH PROTOCOLS DEVELOPED
       BY THE MINES RESCUE SERVICE

 RECOGNISED STANDARD DEVELOPED FOR HEAT STRESS
   MANAGEMENT.

                                                                 3
           FAILURE OF MAIN FAN
ACTION TO BE TAKEN IF VENTILATION FAILS

   AT EACH MINE A STANDARD OPERATING
    PROCEDURE MUST BE DEVELOPED AND
    USED TO SPECIFY THE ACTION THAT MUST
    BE TAKEN TO ENSURE THE SAFETY OF
    PERSONS IN THE EVENT THAT THE
    VENTILATION FAILS IN WHOLE OR IN PART.

                                             3
           USE OF AUXILIARY FANS 1

 ONLY FANS OF A CERTIFIED TYPE MAY BE USED UNDERGROUND.

 THE VENTILATION OFFICER MUST HAVE IN PLACE A DOCUMENTED
  SYSTEM FOR THE OPERATION OF FANS.

 AUXILIARY FAN MUST BE LOCATED AND OPERATED TO PREVENT
  RECIRCULATION.

 MINIMUM QUANTITY OF AIR FLOWING IN ANY PANEL MUST BE THE
  COMBINED SUM OF THE OPEN CIRCUIT OF EACH FAN PLUS 30% OF THE
  LARGEST FAN OPEN CIRCUIT CAPACITY.

 AUXILIARY FAN MUST BE SWITCHED OFF AUTOMATICALLY IN THE
  EVENT OF ANY FAILURE OF THE MAIN VENTILATION SYSTEM.

 SCRUBBER FANS MUST BE LOCATED AND OPERATED IN SUCH MANNER
  AS TO PREVENT UNCONTROLLED RECIRCULATION OF AIR.
                                                                 3
                                AUXILIARY FANS 2
   15 CU MTRE/SEC




                                            7          3
                            9      8               6
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                                                       S
12 CU MTRE/SEC                                         E
                                                       C



Typical Bord and Pillar panel

                                                           4
          USE OF AUXILIARY FANS 3

 STANDARD OPERATING PROCEDURES MUST BE
  DEVELOPED FOR EACH OF THE FOLLOWING
  CLASSIFICATIONS OF FANS:

     AUXILIARY FANS;
     BOOSTER FANS; AND
     FANS INSTALLED AS INTEGRAL PARTS OF
        SCRUBBER SYSTEMS ON MOBILE MACHINES
        THAT ARE IN USE AT THE MINE
       ANY SYSTEM THAT INCLUDES A COMBINATION
        OF DIFFERENT TYPES OF FANS

                                                 4

								
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