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Elements and Performance Criteria

1. Plan and prepare for the implementation of the gas management plan
   • Access, interpret and apply gas management plan documentation, and ensure the work activity is compliant
   • Access, interpret and clarify the gas management plan
   • Identify and communicate to the relevant persons roles and responsibilities as specified in the gas management plan
   • Identify, forecast, schedule and record resources required for the implementation of the gas management plan
   • Identify training needs
2. Implement the gas drainage management procedures
   • Implement hazard control procedures associated with the gas drainage management plan
   • Implement the gas monitoring and testing system installation, operation and maintenance procedures in accordance with site requirements
   • Implement the gas drainage service installation and recovery procedures
   • Implement the gas drainage system maintenance procedures
   • Implement the gas drainage management plan training requirements
   • Implement action levels established to minimise the hazards of gas drainage
   • Implement gas drainage management system information recording and reporting procedures
3. Implement systems for audit and review of gas drainage systems and equipment
   • Audit gas drainage monitoring systems in accordance with legislative and site requirements
   • Audit recording and reporting systems in accordance with legislative and site requirements
   • Audit gas drainage installation, operation, maintenance and recovery procedures
   • Audit the gas drainage management training plan for currency, relevance and compliance with the requirements of the gas drainage management plan
   • Implement procedures for response to instances of non-compliance or other discrepancies/deficiencies revealed by audit
4. Plan and prepare for the implementation of the gas management plan
   • Access, interpret and apply gas management plan documentation, and ensure the work activity is compliant
   • Access, interpret and clarify the gas management plan
   • Identify and communicate to the relevant persons roles and responsibilities as specified in the gas management plan
   • Identify, forecast, schedule and record resources required for the implementation of the gas management plan
   • Identify training needs
5. Implement the gas drainage management procedures
   • Implement hazard control procedures associated with the gas drainage management plan
   • Implement the gas monitoring and testing system installation, operation and maintenance procedures in accordance with site requirements
   • Implement the gas drainage service installation and recovery procedures
   • Implement the gas drainage system maintenance procedures
   • Implement the gas drainage management plan training requirements
   • Implement action levels established to minimise the hazards of gas drainage
   • Implement gas drainage management system information recording and reporting procedures
6. Implement systems for audit and review of gas drainage systems and equipment
   • Audit gas drainage monitoring systems in accordance with legislative and site requirements
   • Audit recording and reporting systems in accordance with legislative and site requirements
   • Audit gas drainage installation, operation, maintenance and recovery procedures
   • Audit the gas drainage management training plan for currency, relevance and compliance with the requirements of the gas drainage management plan
   • Implement procedures for response to instances of non-compliance or other discrepancies/deficiencies revealed by audit

Performance Evidence

Evidence is required to be collected that demonstrates a candidate’s competency in this unit. Evidence must be relevant to the roles within this sector’s work operations and satisfy all of the requirements of the performance criteria of this unit and include evidence that the candidate:

locates and applies relevant legislation, documentation, policies and procedures

implements the procedures and techniques for the safe, effective and efficient implementation of the gas drainage management plan including:

planning and coordinating work to meet site/legislative requirements

operating hand held monitoring equipment

accessing, evaluating and applying design criteria for gas drainage systems and devices

collecting, collating and evaluating gas drainage data

completing gas drainage planning mathematical calculations

interpreting geological information

preparing records and reports

applying the principles of mine design

works with others to undertake and complete the implementation of the gas drainage management plan that meets all of the required outcomes including:

communicating clearly and concisely with others to receive and clarify work instructions, and convey work progress

identifying the relevant information and scope of the work necessary to meet the required outcomes

developing procedures appropriate to mine operations for management of gas drainage

identifying training needs related to the gas drainage

preparing and interpreting briefings and handover details

demonstrates completion of implementing the gas drainage management plan that safely, effectively and efficiently meets all of the required outcomes on more than one (1) occasion including:

identifying viable options and selecting the gas drainage management plan elements that best meet the required outcomes

conducting enquiries/investigations and preparing reports

establishing technical procedures relating to gas drainage

assessing the risks and consequences of gas drainage

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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 development

drilling options and related equipment and techniques including:

impacts of intersecting and intersected holes and hole design

gas drainage on mining techniques, mine and panel design and production output

strata geology and coal seam characteristics on the gas drainage management plan, including:

the effects of the type and quantity of gas in the coal seam

coal seam gradient, moisture content, friability, the porous features of the coal seam, stresses and intrusions

strata control systems and their effects on gas drainage

outburst mining monitoring procedures

components/factors to be considered in the gas management plan including:

pressure changes: causes, the impacts on the ventilation system, and the effects on gas drainage

heat/humidity: the sources and factors which may impact on gas drainage and personnel

underground water management principles and systems

the impacts of accumulation of coal dust after gas drainage has been completed

mine and goaf ventilation systems

equipment, 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 limitations

de-gassing: methods of control – including brattice, auxiliary fans, compressed air venturis, sails, hurdles, bleeders and purging

fixed gas drainage monitoring systems: types, characteristics, uses and limitations

gas drainage surveys: the types, frequency and method for conducting including pressure/quantity/temperature and gas

use of computer-based systems for mine environment and gas drainage systems analysis

processes and techniques for determining alarms and trigger points/levels

ventilation theory, including:

Atkinson’s equation

methods of determining frictional resistance

gas laws, including Charles and Boyle

natural ventilation pressures

gas make

leakage

determination of mine resistance curves

regulator and equivalent orifice calculation

determination of fan operating/duty points

Kirkoff’s laws

emergency response and evacuation/disaster planning processes and techniques

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