The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included. |
Relevant compliance documentation may include: | legislative, organisation and site requirements and procedures manufacturer's guidelines and specifications Australian standards code of practice Employment and workplace relations legislation Equal Employment Opportunity and Disability Discrimination legislation |
Shotfiring requirements may shift briefings, handover details or work orders include: | nature and scope of tasks and achievement targets site location and layout location and direction of blast holes essential geological information essential survey information site environmental conditions detailed timings for the blast detailed responsibilities coordination requirements/issues identification of areas of influence sleeping charges equipment required security measures and procedures monitoring requirements type and quantity of explosives and wet or dry holes stemming material type and quantity of explosives and accessories initiation methods out of bounds areas operational conditions coordination requirements or issues hazards and potential hazards waste management requirements environmental control requirements worksite inspection requirements barricade and signage requirements obtaining of permits required equipment availability and/or requirements plant or equipment defects transport arrangements and/or requirements safe storage requirements public relations requirements |
Site inspections may include: | positioning stemming cleaning up weather check fencing/signage and access routes marking/hole identification inspection measuring holes dewatering holes |
Hazards may include: | chemical energy, including: premature explosion deterioration of explosives stored energy working environment, including: rock stability and ventilation weather conditions insufficient illumination methane coal dust NOX gases poor road or rail conditions strata conditions fire/flames/ignition sources atmospheric contaminants dust and fumes noise ground conditions, including: hot ground scaling lack of ventilation extraneous electricity e.g. static electricity, lightning tipping hazards debris air blast and fly lost holes radioactivity water equipment and materials, including: faulty explosives misfires drilling into misfires premature explosion faulty vehicle faulty equipment broken detonation leads high voltage electricity radio frequencies and transmitters hot exhaust system high air and water pressures hydraulic oil pressure people, including: speeding unauthorised persons theft trespassers processes and procedures, including: back injuries drilling in butts lost holes |
Equipment may include: | siren radios signs vehicles approved for carrying dangerous goods and explosives explosives mixers pumps plugs (to seal finished holes prior to loading) measuring tape cutting implements blast monitoring systems video camera |
Support requirements may include | other equipment and their operators vehicles public and site notification |
Geological and survey data may include: | wet or dry holes strength of material to be shot strength of surrounding strata blast pattern plan ventilation/gas data deputies reports details of cracking in holes. |
Survey of blast area includes: | locate position, direction and incline of blast holes survey reports |
Geological data may include: | rock type structures faults intrusions weathering wet and dry holes hot ground reactive ground hot and reactive ground |
Calculations may include: | measurement of depth of holes, temperature of holes, distances, spacings burdens, resistances, and other relevant blasting parameters addition, subtraction, multiplication, division determinations of areas and volumes calculations of delay timings in pattern designs density of explosives weight of explosives per hole maximum delay of the shot Maximum Instantaneous Charge (MIC) stemming requirements estimation and/or calculation of resistance of circuits, powder factors, hole loadings, exclusion zones, and other relevant factors |
Pattern design may include: | loading and wiring requirements reference to and consideration of geology, hazards safety distances and margins environmental licence conditions gas content of seam strength of surrounding strata other legislative requirements |
Explosives may include: | high explosives low explosives bulk and packaged free flowing explosives deflagrating explosives permitted explosives wet or dry variable density |
Accessories may include: | primers delays down lines trunk lines lead-in lines detonators and detonator assemblies detonation mechanisms including: bell wire and firing lines delay mechanisms blasting machines or mains firing equipment explosives tester binding tape fuses and igniter cords detonators and detonating cord gas bags decking stemming stemming equipment crack detector flushing wand hole liner blast monitoring equipment firing cables / bell wire exploders and testers electronic firing equipment specialist tools initiators |
Inventory control systems may include: | types of explosives quantities of explosives shelf life distribution records and detail reconciliation reports |
Dispose of explosives may include: | burning by the shotfirers on site detonation in a production drill hole detonation in a controlled manner return to supplier or delivery or surrender to an Explosives Inspector for destruction |
Secure blast area sometimes referred to as 'exclusion zones', may be marked or delineated by one or more of the following: | signage windrow bund wall ribbon tape witches hats ropes flags or pegs sentries gates |
Non-conforming conditions may include: | misfires blockages break through deviation undercut ground conditions ventilation water/wet holes hot ground |
Explosion inhibitors may include: | stone dust |
Testing includes | the use of approved testing equipment |
Records and reports may include: | explosive transportation records of consumption and disposal of explosives magazine records blast designs blast plans blast monitoring incident reports |
Blast monitoring systems may include: | vibration monitors noise monitors gas detection visibility strata movement. |
Pre-blasting procedures may include: | warnings sentries area clearance/isolation/barricading inspection and testing for gas other legislative requirements safety distances and control/responsibilities |
Blast initiation systems may include: | safety fuse detonating cord non-electric detonator electric detonator electronic detonator remote firing |
Misfires may be caused by: | faulty explosives or accessories damaged or deteriorated explosives or accessories improperly assembled explosives components inappropriate or incomplete combinations of components operator error or inexperience inattention to detail or ignorance environmental influences, e.g. wet weather or poor visibility |
Post-blast coordination may include: | the return of unused explosives the return of other equipment the withdrawing sentries removal of signs turning off safety devices ventilation of area clearance of noxious gases collection of environmental monitoring equipment recording of environmental monitoring data maintenance may include: testing of exploders servicing of mixing equipment maintenance of hand tools operational maintenance of bulk delivery equipment |
Damaged and deteriorated explosives may be identified by: | exudation efflorescence sweating liquefaction hardening softening discolouration crystallisation staining damage to wrappers and carcasses damage to containers physical wear and tear kinking abrasions and cuts crushing loss of identification labels and markings exposure to the elements |