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Elements and Performance Criteria
Performance Evidence
Knowledge Evidence
The candidate must demonstrate knowledge of implementing the gas drainage management plan through:
methods of gas drainage: their applications/limitations against the mine design, mine and panel ventilation systems, systems of mining and current and future mine developmentdrilling options and related equipment and techniques including:impacts of intersecting and intersected holes and hole designgas drainage on mining techniques, mine and panel design and production outputstrata geology and coal seam characteristics on the gas drainage management plan, including: the effects of the type and quantity of gas in the coal seamcoal seam gradient, moisture content, friability, the porous features of the coal seam, stresses and intrusionsstrata control systems and their effects on gas drainageoutburst mining monitoring procedurescomponents/factors to be considered in the gas management plan including:pressure changes: causes, the impacts on the ventilation system, and the effects on gas drainageheat/humidity: the sources and factors which may impact on gas drainage and personnelunderground water management principles and systemsthe impacts of accumulation of coal dust after gas drainage has been completedmine and goaf ventilation systemsequipment, monitoring systems and techniques including:mine fans: fan laws, fan types, performance characteristics, configurations, applications and limitations in association with the gas drainage management plan,ventilation control devices: the types, purposes, design criteria and specifications, distribution/placement criteria and limitationsde-gassing: methods of control – including brattice, auxiliary fans, compressed air venturis, sails, hurdles, bleeders and purgingfixed gas drainage monitoring systems: types, characteristics, uses and limitations gas drainage surveys: the types, frequency and method for conducting including pressure/quantity/temperature and gasuse of computer-based systems for mine environment and gas drainage systems analysisprocesses and techniques for determining alarms and trigger points/levels ventilation theory, including:Atkinson’s equationmethods of determining frictional resistancegas laws, including Charles and Boylenatural ventilation pressuresgas makeleakagedetermination of mine resistance curvesregulator and equivalent orifice calculationdetermination of fan operating/duty pointsKirkoff’s lawsemergency response and evacuation/disaster planning processes and techniques