Specific knowledge is required to achieve the Performance Criteria of this unit, particularly for its application in the various circumstances in which this unit may be used. This includes knowledge of the following as required to establish and maintain the ventilation management system: legislative and site requirements for ventilation including air quality, maximum and minimum values, control and distribution, flammable gas and dust limits, ventilation fans, gas monitoring, respirable dust limits and inspections and recording/reporting methods of mine ventilation and their applications/limitations including exhaust/force, antitropal, homotropal, flank returns, ascensional/descensional, bleeder, ZUY systems and other combinations methods of panel ventilation and their applications/limitations including homotropal and antritropal auxiliary fans, coursed ventilation (narrow side/wide side), machine mounted scrubber systems, compressed air venturis and bleeders impact of mining techniques and mine and panel design on ventilation impact of coal characteristics and coal seam gradients on mine ventilation design principles and impacts of the ventilation system of gas drainage, spontaneous combustion, outburst and windblast mine gases; the types and their characteristics under varying circumstances, sources, physiological effects and methods of detection dust, fumes and other particulate matter; the types, sources, physical and physiological effect, and control/mitigation methods mine fires; the types, sources of ignition, possible effects on the ventilation circuit and prevention/control/mitigation methods mine explosions; types, ignition sources, possible effects on the ventilation circuit and prevention/control/mitigation methods pressure changes; causes, the impacts on the ventilation system, and responses (to include the causes and effects of natural ventilation and recirculation) heat/humidity; the sources and factors which may impact ventilation and personnel mine roadways and shafts; their design parameters and impact of mine ventilation mine fans; fan laws, fan types, performance characteristics, configurations, applications and limitations ventilation control devices; the types, purposes, design criteria and specifications, distribution/placement criteria and limitations de-gassing; methods of control - including brattice, auxiliary fans, compressed air venturis, sails, hurdles and bleeders ventilation networks and individual circuit design criteria, specifications and design processes fixed ventilation monitoring systems types, characteristics, uses and limitations portable monitoring equipment, types, characteristics, uses and limitations functions, capabilities, advantages, limitation and uses of computer modelling and simulation techniques computer-based systems for mine environmental analysis ventilation management plan development requirements and processes ventilation surveys; the types, frequency and method for conducting including pressure/quantity/temperature and gas/dust processes and techniques for determining alarms and trigger points/levels audit and review processes and techniques emergency response and disaster planning processes and techniques general uses and application of ventilation theory, including: Atkinson's equation, methods of determining frictional resistance, frictional resistance values for mine airways and ducts, psychrometry and heat, gas laws including universal gas law, natural ventilation pressures, static/velocity/total pressures and shock loss, control device leakage, duct leakage, determination of mine resistance curves, combining system resistance and fan curves, regulator and equivalent orifice calculation, determination of fan operating/duty points and Kirchoff's laws |