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 |
Gas drainage management plans establish procedures for maintaining a safe environment including: | hazard identification and quantificationrisk assessmentauthority and responsibilitycontrols established to manage identified risksreporting and communicationdocument controlaudit and review |
Gas drainage management plan may include procedures for: | gas drainage drilling programgas or geological anomaly detectionmine atmosphere monitoringstimulation techniquesgoaf wallsreporting requirementsauditingventilation systems and usagemine planaction planssystems of miningresponse plansemergency proceduresindividual and group responsibilitiestraining and education procedures |
Gas drainage management training applies to: | mine workerstradespersonpermanent employeescontractorsmine officialsother special requirements |
Mine atmosphere refers to all areas in the general mine ventilation district and beyond into waste working and goafs in the mine. | |
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 atmosphereflammable or explosive mixturesoutburstsinduced outburstgas under pressurelocation of drainage pipesstatic electricity |
Gas drainage system maintenance requirement procedures may include those for: | constructionaction responsepermit to workcondition monitoringauditingmaintenancedocument controlatmosphere monitoringventilation system controlcommunication systemssurvey proceduresstandard operating procedureschangestrainingrecording/reporting |
Action (alarm or trigger) level is a generic term used to describe a level determined at the mine site at which action is initiated or a response made. | |
Audit is the validation process to ensure the system, procedures, processes meet the established objectives and are implemented. | |
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). | |
Principles of mine design include: | recoveryreserve optimisationmining directiongeological structuresventilationstrata controlmining methodproductivityenvironmental considerationsaccess |
Standard operating procedures (SOP) are also known as safe working procedures, safe operating procedures and standard working procedures. | |
Mine gases may be seam gases or gases from introduced sources and may include but not be limited to: | |
Ventilation systems may include the use of: | main mine fanauxiliary fansbratticeregulatorssealsstoppingsovercastsventilation doorssurface drainage boreholespressure chambers |
Geological conditions may include: | faultsdykesintrusionsstrata deformitiesinduced stressesdepth of overlaying stratastrength of immediate strataunder and over the coal seammining lease gas make |
Coal seam characteristics may include inherent factors such as: | rankpetrologymoistureparticle sizeseam gas makepyrites.Or depositional factors such as:seam thicknessmulti seamsseam dipdepth of covercleatsfriabilityinteraction of other coal seams and gas makesclay bands within the coal seammolorites zones |
Gas make characteristics may include: | gas contentgas pressureadsorption desorptionhydrostatic pressurestrata moisture contentpermeability and porositytectonic stress |
Gas drainage monitoring may include: | continuous monitoringleakage monitoring (laser beam technology)portable (hand held)monitoringcollection of bag samplespipeflow and pressure measurementsgas chromatographyventilation measurements from relevant areas |
Gas drainage infrastructure may include: | vacuum pumpspipesstand pipesgas separators and casingsurface installationsgas drainage plan including buildingvalveshoseswater pumpsflame and lightening arresterspower supply to bore holescleaning equipmentair compressorselectricity and water servicespressure gauges hydration plants |
Alarm systems and action plans may include those for gas concentration / make, combustion indicators, condition monitoring for fans (vibration / temperature / current failures), ventilation devices, monitoring hardware and temperature alarms. | |
Maintenance of the gas drainage system may include inspection, servicing and repair. | |