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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 implementation documentation, and ensure the work activity is compliant
   • Access, interpret and clarify the legislative and site requirements related to gas management systems
   • Access, interpret and clarify the gas management plan
   • Identify and communicate roles and responsibilities, as specified in the gas management plan to all involved persons
   • Identify, forecast, obtain and allocate/schedule resources required for the implementation of the gas management plan
   • Identify training needs
   • Review gas management procedures and, implement identified changes
2. Implement mine gas monitoring measures
   • Identify, measure and interpret the impact of changes in composition, the concentration of gas and gas make, and associated hazards on the mine atmosphere
   • Implement procedures for the installation, operation and maintenance of gas monitoring systems
   • Implement systems and procedures for the collection and analysis of gas samples
   • Record and report monitoring system data in accordance with the gas management plan
   • Investigate changes in mine atmosphere status and implement appropriate corrective action and
   • Record and process reports
3. Implement ventilation/gas control measures
   • Monitor mine factors and action in accordance with the gas management plan
   • Implement gas hazard control procedures associated with gas drainage, outburst mining conditions and the gas management plan
   • Identify and implement appropriate response procedures in situations where trigger levels are reached
   • Implement ventilation and gas monitoring systems and surveys to assess the status of the systems
   • Implement procedures covering the relocation, operation and maintenance of drilling rigs and gas drainage infrastructure according to site requirements
   • Implement systems to prevent and/or respond immediately to the intersection of current and other workings
   • Implement gas emergency and evacuation procedures in accordance with the Mine Safety Management System
   • Implement the gas management training plan
4. Audit gas management systems
   • Review the effectiveness of the gas management systems in accordance with the requirements of the gas management plan
   • Audit mine gas monitoring systems operations for compliance with legislative requirements and the gas management plan
   • Audit mine gas control devices for compliance with legislative and mine site requirements
   • Audit recording systems for compliance with the gas management plan
   • Audit the maintenance program and procedures for compliance with the gas management plan
   • Audit gas emergency and evacuation procedures for compliance with the mine safety management system
   • Audit the gas management training plan for currency, relevance and compliance with the gas management plan
5. Plan and prepare for the implementation of the gas management plan
   • Access, interpret and apply gas management plan implementation documentation, and ensure the work activity is compliant
   • Access, interpret and clarify the legislative and site requirements related to gas management systems
   • Access, interpret and clarify the gas management plan
   • Identify and communicate roles and responsibilities, as specified in the gas management plan to all involved persons
   • Identify, forecast, obtain and allocate/schedule resources required for the implementation of the gas management plan
   • Identify training needs
   • Review gas management procedures and, implement identified changes
6. Implement mine gas monitoring measures
   • Identify, measure and interpret the impact of changes in composition, the concentration of gas and gas make, and associated hazards on the mine atmosphere
   • Implement procedures for the installation, operation and maintenance of gas monitoring systems
   • Implement systems and procedures for the collection and analysis of gas samples
   • Record and report monitoring system data in accordance with the gas management plan
   • Investigate changes in mine atmosphere status and implement appropriate corrective action and
   • Record and process reports
7. Implement ventilation/gas control measures
   • Monitor mine factors and action in accordance with the gas management plan
   • Implement gas hazard control procedures associated with gas drainage, outburst mining conditions and the gas management plan
   • Identify and implement appropriate response procedures in situations where trigger levels are reached
   • Implement ventilation and gas monitoring systems and surveys to assess the status of the systems
   • Implement procedures covering the relocation, operation and maintenance of drilling rigs and gas drainage infrastructure according to site requirements
   • Implement systems to prevent and/or respond immediately to the intersection of current and other workings
   • Implement gas emergency and evacuation procedures in accordance with the Mine Safety Management System
   • Implement the gas management training plan
8. Audit gas management systems
   • Review the effectiveness of the gas management systems in accordance with the requirements of the gas management plan
   • Audit mine gas monitoring systems operations for compliance with legislative requirements and the gas management plan
   • Audit mine gas control devices for compliance with legislative and mine site requirements
   • Audit recording systems for compliance with the gas management plan
   • Audit the maintenance program and procedures for compliance with the gas management plan
   • Audit gas emergency and evacuation procedures for compliance with the mine safety management system
   • Audit the gas management training plan for currency, relevance and compliance with the gas management plan

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 management plan including:

operating hand held monitoring equipment

collecting, collating and evaluating gas management data

accessing, evaluating and applying data from monitoring systems and equipment

applying risk management processes and techniques

accessing and analysing gas information related to the mine including archival and historical information

interpreting and applying mathematical and scientific theorems / laws related to gas

works with others to undertake and complete the implementation of the gas 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 and implementing gas management training requirements, programs, systems and procedures

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

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

conducting investigations and preparing reports

conducting audit and review processes

completing site document control requirements

implementing procedures for the relocation, operation and maintenance of drilling rigs and gas drainage infrastructure

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Knowledge Evidence

The candidate must demonstrate knowledge of implementing the gas management plan through:

identifying the principles of ventilation management including mine and goaf ventilation systems

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

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

methods of gas drainage including:

their applications / limitations against the mine design, mine and panel ventilation systems, systems of mining and current and future mine development

coal characteristics and coal seam gradients on mine gas management systems

mining techniques, and the impact of mine and panel design on gas management

gas drainage on dust generation during mining

geological data and identifying the impact of differing geological features and conditions on gas management and outburst including:

faults, dykes, intrusions and strata deformities

impacts of intersecting and intersected holes and hole design

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

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

effects of re-circulation

methods of control of outburst

underground water management techniques

inertisation techniques

equipment, monitoring systems and techniques including:

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

determining alarms and trigger points / levels

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

emergency response and evacuation/disaster planning processes and techniques

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