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 |
Coal seam characteristics may include inherent factors such as: | rankpetrologymoistureparticle sizeseam gasPyrites depositional factors such as:seam thicknessmulti seamsseam dipdepth of cover |
Mine atmosphere refers to all areas in the general mine ventilation district and beyond into waste working and goafs/gobs in the mine. | |
Inertisation may be defined as the displacing or reducing of oxygen to a level that will not support combustion. It may be either a natural process using seam gases or a process of introducing incombustible gases. | |
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. | |
Principles of mine design may include: | recoveryreserve optimisationmining directiongeological structuresventilationstrata controlmining methodproductivityenvironmental considerations and accessdepth of coverlocation of adjacent seamslocation of adjacent workings |
Control methods are processes for the mitigation of spontaneous combustion and may include: | quenchinggroutingsmotheringexcavatingventilation control by pressure balancingsealingwater injection |
Hazards may include: | irrespirable atmospherenoxious atmosphereflammable or explosive mixtures |
Spontaneous combustion management plan may include procedures for: | mine atmosphere monitoringreporting requirementsauditingventilation systems and usageinertisation techniquesmine planaction plansresponse plansemergency proceduresindividual/group responsibilitiestraining and education |
Audit is defined as: a systematic examination against defined criteria to determine whether activities and related results conform to planned arrangement, and whether these arrangements are implemented effectively and are suitable to achieve the organisation's policy and objectives (AS/NZS 4804: 2001). | |
Mine gases may include gases such as: | methanecarbon dioxide hydrogen sulphidenormal atmosphere gasesother gases produced from the processes of heating coal |
Ventilation control devices may include: | stoppingsovercastsregulatorspreparation sealsfire doorsbulk headsgoaf sealsfinal seals pressure chambers |
Geological conditions may include: | faultsdykesintrusions strata deformities |
Mine atmosphere monitoring may include: | continuous monitoringportable (hand held) monitoringcollection of bag samplesgas chromatographydifferential pressure measurements across stoppings, seals, solid coal (intake to return) ventilation measurements from all areas of the mine including sealed areas, waste workingsthermographic monitoring |
Sensory spontaneous combustion indicators may include: | smokehazesweatingsmellheat |
Gaseous spontaneous combustion indicators may include increased production of: | carbon monoxide carbon dioxidemethanehydrogen hydrocarbons or the use of indicator ratios such as:CO makeGraham's ratioTrickettsMorris' Oxides of Carbon ratio other ratios as determined suitable |
Defects to ventilation structures may include: | deterioration of materialsquality of constructioneffects of surrounding strata physical damage water damage |
Control measures may include: | removal of coal accumulationmodification of transport proceduresprocedures for responding to changes in atmospheremine atmosphere monitoring systemsprocedures relating to the status of the ventilation systemsealing proceduresgoaf monitoring systemsgoaf sampling systemsspontaneous combustion inspection system |