The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included. |
Relevant compliance documentation may include: | legislative, organisational and site requirements and proceduresmanufacturer's guidelines and specificationsAustralian standardsEmployment and workplace relations legislationEqual Employment Opportunity and Disability Discrimination legislation |
Mine gases may be seam gases or gases from introduced sources, and may include: | methanecarbon dioxideoxides of nitrogenhydrogencarbon monoxidesulphur dioxidehydrogen sulphidehydrocarbons combinationsoxygennitrogen |
Alarm (also known as trigger level) systems and action plans may include those for: | gas concentration/make/ratiosspontaneous combustion (physical and gaseous)combustion indicatorscondition monitoring for fans (vibration/temperature/current/failures)ventilation devices monitoring hardwarevirgin gas content of the coal seam |
Audit is the validation process to ensure the system, procedures, processes meet the established objectives and are implemented. | |
Coal seam characteristics may include inherent factors such as: | rankpetrologymoistureparticle sizeseam gas - composition and contentpyrites permeabilityOr depositional factors such as:seam thicknessmultiple and rider seamsseam dipdepth of covercleats friability |
Changes to mine atmosphere conditions may include those resulting from: | planned disruptionschanges in barometric pressurefall of groundfan changes/failureventilation control device changes/failureoutburstholing into previous workingsre-circulationventilation circuit changesnatural ventilation pressure changesexplosionschanges in ambient temperature/humidityfiresequipment movementflooding of roadwayseffects of re-circulation including:build up of contaminant concentration (gas, fumes, dust, heat) decrease in oxygen |
Gas drainage management plan may include procedures for: | gas drainage drilling programgas or geological anomaly detectionmine atmosphere monitoringstimulation techniquesinstallation, inspection and maintenance of goaf sealsreporting requirementsauditingventilation systems and usagemine planaction planssystems of miningresponse plansemergency proceduresindividual and group responsibilitiestraining and education procedures |
Gas drainage system monitoring may include: | continuous monitoringleakage monitoring (laser beam technology)portable (hand held) monitoringcollection of bag samplesidentifying pipeflow and pressure requirements ventilation measurements from relevant areas |
Gas make characteristics may include: | gas contentgas pressureadsorption desorptionhydrostatic pressurestrata moisture contentpermeability and porosity |
Gas management includes controls for gas drainage and gas outburst. | |
Gas management devices and methods may include: | gas drainageinfusionscrubbersautomatic gas detectorstube bundle systemsde-gassing device on auxiliary fans gas monitoring systemsinertisation systemsmonitoring devices, including:barographtube bundlereal time telemetryportable (hand held) monitoringbag samplesgas chromatography |
Ventilation devices may include: | stoppingsovercastsregulatorspreparation sealsventilation doorsbulk headsgoaf sealsfinal sealspressure chambersair locks |
Gas management plan may include procedures for: | |
Mine gases may include: | mine atmosphere monitoringreporting requirementsauditingventilation systems and usageinertisation techniquesmine plantrigger action response plansemergency proceduresindividual group responsibilitiestraining and education indicators for the requirement to develop a gas drainage management plan indicators for the requirement to develop a gas outburst management plancriteria for mine ventilation including:legislative requirementsmine ventilation management planmeasures to reduce and/or control seam gasintroduced gasfumes and dusttemperature/humidity and maximum/minimum velocity specificationsventilation efficiencypressure and quantity |
Gas management plans establish procedures for maintaining a safe environment may include: | hazard identification and quantificationrisk assessmentauthority and responsibilitycontrols established to managed identified risksreporting and communicationdocument controlaudit and review |
Gas management procedures may include those for: | constructionaction responsepermit to work/minecondition monitoringauditingmaintenanceatmosphere monitoringventilation system controlcommunication systemssurvey proceduressealing procedureschangesblocked bore holes and standpipespipe pressures and flowsgas analysis training and recording/reporting |
Gas management training may apply to: | mine workerstradespeoplepermanent employeescontractorsmine officialsother special requirements |
Hazard is defined as: a source of potential harm or a situation with a potential to cause loss (definition from AS/NZS 4360:1999 Risk Management). | |
Hazards may include: | irrespirable atmospherenoxious atmospheresflammable or explosive mixturesoutburst |
Installations where gas drainage hazards may be assessed include: | vacuum pumpspipesstand pipesgas separators and casingsurface installationsgas drainage plant including building and surface locationvalveshoseswater pumpsflame and lightning arresterspower supply to bore holescleaning equipmentair compressorselectricity and water servicespressure gauges hydration plants |
Interpret is defined as: the understanding needed by the person within their job role. | |
Maintenance of the ventilation system may include: | inspectionservicingrepair |
Methods of ventilation may include: | antitropalhomotropalflank returnsascensional / descensionalbleederZ/U/Y systemsoverlapping systemsother combinations |
Mine atmosphere refers to all areas in general mine ventilation district and beyond into waste working and goafs/gobs in the mine. | |
Mine atmosphere monitoring may include: | continuous monitoringportable (hand held) monitoringcollection of bag samplesgas chromatographyventilation measurements from all areas of the mine, including sealed areaswaste workings |
Mine factors which may impact on gas management may include: | mining directiongeological structuresventilationresults of core samplesextraction ratestrata controlmining methodGeological and physical conditions of the seam and surrounding strata which may contribute to outburst potential, including:cutterschanging cleatcoal colourfree gas into atmospheremylonitegas content and compositionover and underlying strata (including depth, strength and type)permeability of seam and stratainduced stressesfaultsintrusionsstrata deformities |
Monitoring includes that related to: | atmospheric pressuremine atmosphereventilation pressuretemperaturefire the condition monitoring of ventilation devicesgas drainage monitoring |
Monitoring system data may include: | compositionconcentrationrate of changebarometergas makegas threshold levels |
Procedures for outburst mining conditions may include : | mine atmosphere monitoringreporting requirementsauditingventilation systems and usagepre-drilling techniquesinitiation techniquesmine planaction plansresponse plansemergency proceduresindividual/group responsibilitiestraining and education proceduresauthority to mine |
Risk is defined as: the chance of something happening that will have an impact upon objectives. It is measured in terms of consequences and likelihood (definition from AS/NZS 4360:1999 Risk Management). | |
Specific gas emissions may include seam gases or gases from introduced sources and may include but not be limited to: | methanecarbon dioxidehydrogen sulphide |