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Elements and Performance Criteria

1. Plan and prepare for the application and monitoring of the gas drainage management plan
   • Access, interpret and apply gas drainage management plan documentation, and ensure the work activity is compliant
   • Obtain, read, interpret, clarify and confirm work requirements
   • Identify, clarify and communicate roles and responsibilities
   • Identify, obtain and allocate resources required for the application of the gas drainage management plan
   • Identify individual training needs and prepare training plans
   • Encourage, receive, review and, where appropriate, implement suggestions and recommendations for changes to gas drainage management procedures
2. Apply the gas drainage management procedures
   • Identify and interpret the impact on the mine atmosphere of changes of gas make, composition and concentration
   • Identify and apply hazard control procedures associated with gas drainage
   • Apply gas monitoring system installation, operation and maintenance procedures
   • Apply drainage service extension and recovery procedures
   • Apply gas drainage system maintenance requirement procedures
   • Apply procedures incorporating methods and practices to minimise potential damage to the gas drainage system
   • Apply and monitor action levels established to minimise the hazards of gas drainage
   • Apply gas drainage system information recording and reporting procedures
   • Contribute to systems audit and review requirements
   • Implement training plans
3. Apply gas drainage management system maintenance procedures
   • Carry out inspections, repair and maintenance activities
   • Record, report and review maintenance activities

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 requirements, procedures and techniques for the safe, effective and efficient completion of gas drainage management plan application and monitoring including:

operating hand held monitoring equipment

accessing, interpreting and applying relevant gas drainage data

interpreting geological reports

conducting audit and review processes and techniques

accessing, interpreting and applying technical information related to gas drainage

interpreting geological reports

briefings and handover details

identifying training needs, and preparing and implementing training plans

assessing the risks and consequences of gas drainage

works effectively with others to plan, prepare and conduct the application and monitoring of the gas drainage management plan that meets all of the required outcomes including:

organising work activities to meet all task requirements

communicating clearly and concisely with others to receive and clarify work instructions

complying with written and verbal reporting requirements and procedures

resolving coordination requirements throughout work activities

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

application of gas drainage procedures such as:

gas drainage drilling program

gas or geological anomaly detection

mine atmosphere monitoring

stimulation techniques

goaf walls

reporting requirements

auditing

ventilation systems and usage

mine plan

action plans

systems of mining

response plans

emergency procedures

individual and group responsibilities

training and education procedures

application of gas drainage monitoring such as:

continuous monitoring

leakage monitoring (laser beam technology)

portable (hand held)

monitoring

collection of bag samples

pipeflow and pressure measurements

gas chromatography

ventilation measurements from relevant areas

applying gas drainage management training to:

mine workers

trades persons

permanent employees

contractors

mine officials

other special requirements

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Knowledge Evidence

The candidate must demonstrate knowledge of the following when applying and monitoring the gas drainage management plan:

legislative, organisation and site requirements and procedures for:

gas drainage drilling

gas drainage installation

ventilation requirements

return airways gas levels

intake airway gas accumulated levels

gas control and distribution

environmental monitoring and management

local government and mine site inspection and reporting

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

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

the impact of the strata geology, strata control systems and coal seam characteristics on the gas drainage management plan, including:

coal seam gradient

moisture content

friability

the porous features of the coal seam

stresses and intrusions

mining monitoring procedures

identifying drilling options and related equipment and techniques, including:

impacts of intersecting holes and hole design

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

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

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

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

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

mine and goaf ventilation systems, and 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

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

portable monitoring equipment for gas drainage purposes: types, characteristics, uses and limitations

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

gas drainage computer modelling and simulation techniques: functions, capabilities, advantages, and limitations for mine environment analysis

ventilation theory, including:

gas laws including Charles and Boyle

natural ventilation pressures

gas make

leakage

Kirchhoff's Law

hazard management processes and techniques

processes and techniques for determining alarms and trigger points/levels

emergency response and evacuation/disaster planning processes and techniques

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