1. 1 COAL MINING SAFETY & HEALTH REGULATION 2000 CHAPTER 4 UNDERGROUND REGULATION Roger Bancroft Deputy Chief Inspector of Mines (Technical) C:\TECHSERVICES FILES\LEGISLATION\UGROUNDREGS1.PPT

2. 2 uAPPLIES TO UNDERGROUND WORKINGS AND ANYTHING CONNECTED TO UNDERGROUND WORKINGS F BELT CONVEYORS F MAIN FAN STRUCTURES F ELECTRIC CABLES F MONITORING EQUIPMENT CONCEPTS

3. 3 F EXPLOSION RISK ZONES F PROVISION OF METHANE DETECTORS F STONEDUSTING F USE OF ALUMINIUM F WELDING F INSPECTIONS F POTENTIAL INRUSHES F ESCAPEWAYS F FIREFIGHTING F FAILURE OF MAIN FAN F USE OF AUXILIARY FANS MAJOR DIFFERENCES TO 1925 REGULATIONS

4. 4 Risk assessment required to determine location and types of Explosion Risk Zones uTYPES PERZ0 - l any place where methane is or could be greater than 2% PERZ1 l any place where methane is or could be between 0.5% and 2% PNERZ l any place where methane is less than 0.5% EXPLOSION RISK ZONES

5. 5 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 Pwhere coal or other material is being mined Pwithin goaf areas Pwhere ventilation is not being provide to meet the required standards Pwhere connections to or repairs to methane drainage ranges are being made Pwhere drilling for exploration or seam drainage is taking place. PInbye side of inbye rib of last line of cuthroughs Pall of those places that are on the return side of the above

6. 6 PROVISION OF AUTOMATIC METHANE DETECTORS 1

7. 7 PROVISION OF AUTOMATIC METHANE DETECTORS 2

8. 8 PROVISION OF AUTOMATIC METHANE DETECTORS 3

9. 9 METHANE DETECTORS- RESPONSE LEVELS 1

10. 10 METHANE DETECTORS- RESPONSE LEVELS 2

11. 11 METHANE DETECTORS- RESPONSE LEVELS 3

12. 12 METHANE DETECTORS- RESPONSE LEVELS 4

13. 13 METHANE DETECTORS- RESPONSE LEVELS 5

14. 14 METHANE DETECTORS- RESPONSE LEVELS 6

15. 15 PROPOSED BORD AND PILLAR METHANE MONITORING AUTOMATIC DETECTORS 98 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 Pillars 50m long

16. 16 Typical Longwall panel Supports A.F.C. SHEARER BOUNDARIES OF ERZ1 ZONES TO BE MARKED PROPOSED METHANE MONITORING ON LONGWALLS ERZ1 AUTOMATIC DETECTORS

17. 17 8 AUTOMATIC MONITORS FOR MINE GOAF FACE MONITORS 1st OUTBYE MONITORS IF FACE MONITORS TRIP AT > 0.5% POWER GOES OFF TO 1st OUTBYE MONITORS OR SURFACE UNLESS 2ND SET OF MONITORS INSTALLED OUTBYE

18. 18 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

19. 19 STONEDUSTING REQUIREMENTS INBYE LAST CUTHROUGH - EVERY 24HOURS IF GREATER THAN 50M ADVANCE

20. 20 8 STONEDUSTING REQUIREMENTS GOAF LONGWALL PILLARS 100M LONG X PANEL PILLARS 50M LONG OUTBYEOUTBYE 85% incombustibles 80% incombustibles 70% incombustibles

21. 21 USE OF ALUMINIUM KExposed aluminium alloy must not be used underground if it contains more than 6 percent of magnesium and titanium KExternal rotating or reciprocating parts not to contain more than 0.6 percent magnesium and titanium KA mine must establish and implement controls for the storage, transport, handling, use and disposal of alloy objects and equipment used underground. KThe controls are to take into account the fact that accumulation of alloy dust can be explosive or combustible.

22. 22 WELDING 1 Welding in Areas other than a Permanent Workshop HNO WELDING IN ANY AREA WHERE FLUSHING OF METHANE GREATER THAN 0.5% CANNOT BE CONTROLLED. HWELDING TO STOP IF MORE THAN 0.5% METHANE. HWELDING AND HOT WORK MUST BE AUTHORISED BY THE MANAGER. HA RISK ASSESSMENT MUST BE CARRIED OUT BEFORE WELDING H FIRE WATCH MUST BE POSTED DURING AND AFTER THE WORK IS COMPLETED.

23. 23 WELDING 2 Welding in Areas other than a Permanent Workshop HWELDING TO BE SUPERVISED BY PERSON WITH 1st, 2nd OR DEPUTY’S CERTIFICATE HTHE AREA MUST BE STONE DUSTED TO AT LEAST 80 PERCENT ON ALL ROADWAYS HONLY PERSONS INVOLVED ALLOWED IN THE VENTILATION SPLIT HACCURATE AND ADEQUATE RECORDS MUST BE KEPT HAN INSPECTOR MUST BE NOTIFIED WITHIN 7 DAYS.

24. 24 WELDING 3 Welding or Hot Work in a Permanent Underground Workshop FPERMANENT UNDERGROUND WORKSHOP ONLY ALLOWED IN A NERZ ZONE. FWELDING TO BE CARRIED OUT WHERE METHANE MAINTAINED AT LESS THAN 0.5 PERCENT. FWELDING MUST STOP WHERE METHANE IS GREATER THAN 0.5 PERCENT. FWELDING TO BE SUPERVISED BY PERSON WITH 1st, 2nd OR DEPUTY’S CERTIFICATE FMINE MUST ESTABLISH AND IMPLEMENT CONTROLS FOR THE CONSTRUCTION, MAINTENANCE AND OPERATION OF A PERMANENT UNDERGROUND WORKSHOP.

25. 25 INSPECTIONS 1 HAt 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. HStandard Operating Procedures for Inspections Matters that must be considered include: Hthe 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.

26. 26 INSPECTIONS 2 FStandard 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

27. 27 INSPECTIONS 3 STANDARD FOR INSPECTION OF MINE WORKINGS CONTAINS THREE SECTIONS HPART A - DEALS WITH GENERAL INSPECTION MATTERS HPART B - DEALS WITH SOP’s AND SCHEDULING OF INSPECTIONS HPART C -IS A DEFAULT INSPECTION REGIME IF NO SOP’S AND INSPECTION ZONES DETERMINED

28. 28 INSPECTIONS 4 Conduct of Inspections At a mine, inspections of the workings must be carried out in accordance with either: HParts A and B of the Standard for Inspection of Mine Workings; or HParts A and C of the Standard for Inspection of Mine Workings. HStandard Operating Procedures must be developed in relation to inspections and other matters arising from them. HSufficient competent persons must be appointed to carry out required inspections within the time intervals defined for the inspections. HA 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.

29. 29 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 Hhave the competencies and skills necessary to enable him to make adequate and accurate assessments of the conditions of safety of the workings being inspected.

30. 30 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

31. 31 POTENTIAL INRUSHES u MINE MUST DETERMINE BY RISK ASSESSMENT ANY SOURCE OF INRUSH FROM ANY DIRECTION AND ANY DISTANCE THAT COULD AFFECT MINE WORKINGS u DETAILS MUST BE KEPT OF HLocation and nature of the inrush source. HNature and thickness of the strata, measured in any plane that separates the inrush source from the workings that could be affected. Hpresence of any faults, dykes or boreholes in that separating strata. HAny other relevant data. u SOP MUST BE IMPLEMENTED TO DEMONSTRATE THAT METHOD OF WORKING REDUCES RISK FROM INRUSH TO ACCEPTABLE LEVELS u SOP MUST BE KEPT UP TO DATE AND PROMINENTLY DISPLAYED

32. 32 ESCAPEWAYS 1 u AT LEAST TWO SEPARATE TRAFFICABLE ENTRANCES FROM THE SURFACE. u FROM ERZ1 ZONE MUST HAVE TWO DIFFERENT WAYS OF ESCAPE TO THE SURFACE OR A PLACE OF REFUGE. u TWO SEPARATE INTAKE AIRWAYS MUST BE PROVIDED EXCEPTING FOR SINGLE PRODUCTION UNIT. u DOES NOT APPLY TO ANY INDIVIDUAL ENTRY IN THE COURSE OF BEING DRIVEN. u PRIMARY ESCAPEWAYS u AT LEAST ONE OF THE ESCAPEWAYS MUST BE AN INTAKE AIRWAY AND NAMED THE PRIMARY ESCAPEWAY.

33. 33 ESCAPEWAYS 2 u THE PRIMARY ESCAPEWAY MUST BE SEGREGATED FROM ALL OTHER ROADWAYS BY SEGREGATION CONTROL DEVICES. u 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. u 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

34. 34 8 ESCAPEWAYS 3 GOAF LONGWALL PILLARS 100M LONG OUTBYEOUTBYE PRIMARY ESCAPEWAYS INTAKES RETURNS SUBSTANTIAL AIRTIGHT STOPPINGS

35. 35 FIREFIGHTING 1 O RISK ASSESSMENT PROCESS MUST BE CARRIED OUT TO IDENTIFY ALL POTENTIAL FIRE HAZARDS AT THE MINE. O MUST BE PROVIDED AT THE MINE AT ALL TIMES, SUITABLE AND SUFFICIENT MEANS TO EXTINGUISH ANY FIRE TYPE IDENTIFIED BY THE RISK ASSESSMENT. O NO BUILDING OR STRUCTURE LOCATED IN ANY UNDERGROUND MINE, MUST BE CONSTRUCTED OF ANY FLAMMABLE MATERIAL WHICH MAY CAUSE DANGER FROM FIRE O MUST BE APPOINTED AT EVERY UNDERGROUND COAL MINE ONE OR MORE FIRE OFFICERS WHO MUST BE RESPONSIBLE FOR: áINSPECTIONS, TESTING AND MAINTENANCE OF FIRE FIGHTING EQUIPMENT áKEEPING INSPECTION, TESTING AND MAINTENANCE RECORDS áIDENTIFYING TRAINING NEEDS AND IMPLEMENTING TRAINING PROGRAMS áENSURING THE CURRENCY OF FIRE FIGHTING PLANS AND PROCEDURES; áENSURING THAT THE EMERGENCY COMMUNICATION SYSTEM IS OPERATING.

36. 36 FIREFIGHTING 2 H ALL FIRE FIGHTING EQUIPMENT AND APPARATUS MUST BE COMPATIBLE THROUGHOUT THE MINE H PORTABLE FIRE FIGHTING EXTINGUISHERS MUST BE LOCATED ON OR NEAR ALL EQUIPMENT AND INSTALLATIONS IDENTIFIED BY RISK ASSESSMENT H SOP’s FOR ACTION IN EVENT OF FIRE TO BE DEVELOPED AND DISPLAYED H MINE MUST DISPLAY A FIRE FIGHTING PLAN IN A SUITABLE POSITION ON THE SURFACE H PLAN MUST BE REVISED AT REGULAR INTERVALS TO ENSURE THAT THE INFORMATION ON THE PLAN IS KEPT CURRENT

37. 37 HOT WORK (HEAT STRESS) F IF WET BULB TEMPERATURE EXCEEDS 27 0 C, MINE MUST IMPLEMENT A SYSTEM TO ENSURE THE HEALTH OF PERSONS. F PERSON MUST NOT WORK WHERE THE EFFECTIVE TEMPERATURE EXCEEDS 29.4 0 C EXCEPT á IN THE EVENT OF ESCAPE IN AN EMERGENCY: OR á WHERE A PERSON IS ENGAGED IN WORK DESIGNED TO REDUCE THE EFFECTIVE TEMPERATURE OF A WORKING PLACE: OR á IS WORKING IN ACCORDANCE WITH PROTOCOLS DEVELOPED BY THE MINES RESCUE SERVICE F RECOGNISED STANDARD DEVELOPED FOR HEAT STRESS MANAGEMENT.

38. 38 FAILURE OF MAIN FAN ACTION TO BE TAKEN IF VENTILATION FAILS H 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.

39. 39 USE OF AUXILIARY FANS 1 H ONLY FANS OF A CERTIFIED TYPE MAY BE USED UNDERGROUND. H THE VENTILATION OFFICER MUST HAVE IN PLACE A DOCUMENTED SYSTEM FOR THE OPERATION OF FANS. H AUXILIARY FAN MUST BE LOCATED AND OPERATED TO PREVENT RECIRCULATION. H 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. H AUXILIARY FAN MUST BE SWITCHED OFF AUTOMATICALLY IN THE EVENT OF ANY FAILURE OF THE MAIN VENTILATION SYSTEM. H SCRUBBER FANS MUST BE LOCATED AND OPERATED IN SUCH MANNER AS TO PREVENT UNCONTROLLED RECIRCULATION OF AIR.

40. 40 AUXILIARY FANS 2 Typical Bord and Pillar panel 98 7 6 12 CU MTRE/SEC 15 CU MTRE/SEC 32CU MTRE/SEC32CU MTRE/SEC

41. 41 USE OF AUXILIARY FANS 3 H STANDARD OPERATING PROCEDURES MUST BE DEVELOPED FOR EACH OF THE FOLLOWING CLASSIFICATIONS OF FANS: á AUXILIARY FANS; á BOOSTER FANS; AND á FANS INSTALLED AS INTEGRAL PARTS OF SCRUBBER SYSTEMS ON MOBILE MACHINES THAT ARE IN USE AT THE MINE á ANY SYSTEM THAT INCLUDES A COMBINATION OF DIFFERENT TYPES OF FANS