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 implement the gas management plan: legislative and site requirements for gas management including air quality and quantity, maximum and minimum values, control and distribution, flammable gas limits, ventilation fans, gas monitoring, inspections and recording / reporting the methods of mine ventilation and their applications / limitations including exhaust / force, antitropal, homotropal, flank returns, ascensional / decensional, bleeder, Z/U/Y systems and other combinations the methods of panel gas management and their applications / limitations including homotropal and antitropal (and in conjunction with these, the use of goaf bleed or back return), auxiliary fans, coursed ventilation (narrow side / wide side), machine mounted scrubber systems, compressed air venturis and bleeders the impact of mining techniques the impact of mine and panel design on gas management the impact of differing geological features and conditions on gas management including faults, dykes, intrusions and strata deformities the impact of coal characteristics and coal seam gradients on mine gas management systems mine gases; the types and their characteristics, sources, physiological effects and methods of detection mine fires; the types and possible impacts on gas management mine explosions; the types, ignition sources and possible impacts on gas management pressure changes; causes and the impacts on gas management heat / humidity; the sources and factors which may impact on mine gas management mine fans; fan types, applications and limitations gas 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 fixed gas monitoring systems types, uses and limitations portable monitoring equipment, types, characteristics, uses and limitations computer-based systems for mine gas analysis Gas Management Plan development requirements and processes techniques for determining alarms and trigger points / levels audit and review processes and techniques site document control requirements emergency response and evacuation procedures the general use and application of ventilation theory including gas laws including Charles and Boyle natural ventilation Coward's Triangle Graham's Ratio Ellicott Diagram gas make Trickett's Ratio leakage psychrometry and heat CO/CO2 Kirchoff's laws geological data the impact of differing geological features and conditions on outburst including faults, dykes, intrusions and strata deformities methods of control of outburst the methods of gas drainage and their applications / limitations against the mine design, mine and panel ventilation systems, systems of mining and current and future mine development the impacts of gas drainage on dust generation during mining impacts of intersecting and intersected holes and hole design principles of ventilation management mine and goaf ventilation systems underground water management techniques site environmental monitoring requirements risk management procedures inertisation techniques |