About Us
Why Choose QDBS for Barossa Valley Works and Projects
Barossa Valley projects can present a different combination of conditions from mining production work or an isolated regional quarry.
The drilling area may be located near a winery, cellar door, production facility, vineyard, heritage building, public road, residence, water pipeline, processing plant or operating agricultural property.
The work may also form part of a broader civil programme, quarry production cycle, winery expansion, water infrastructure project, subdivision or renewable energy development.
Drilling and blasting starts with understanding the required excavation outcome.
The drilling method, hole diameter, burden, spacing, depth, subdrill, stemming and initiation sequence all need to suit the ground conditions and the result the client requir
The drilling operation must then reproduce the design accurately in the ground.
A typical drill and blast workflow may involve:
Reviewing drawings, specifications and survey information
Understanding access and site operating requirements
Identifying nearby buildings, tanks, pipelines, services and sensitive areas
Reviewing vibration, noise and environmental constraints
Confirming exclusion-zone and blast-clearance requirements
Checking drill access and work-area conditions
Planning the drill pattern or specialist drilling method
Setting out or confirming hole locations
Drilling holes to the required depth and alignment
Recording actual depths and ground conditions
Identifying water, cavities, fractured material or unstable holes
Inspecting completed holes before blast preparation
Coordinating blast loading and firing where blasting is required
Communicating with the client and site team
Completing blast reports, drill logs and handover records
The drilling stage has a direct effect on the excavation or blast result.
Incorrect collar positions can change the effective burden and spacing. Insufficient depth can leave toe, high spots or unbroken material that interferes with foundations, trenches and final excavation levels.
Excessive hole deviation can contribute to uneven fragmentation, uncontrolled overbreak or damage outside the intended excavation boundary.
Variable overburden, weathered material, fractured rock, water and unstable holes can also affect how holes need to be drilled, protected and prepared.
These conditions need to be identified, recorded and communicated before the next stage of work begins.
The blast is only as good as the holes prepared for it.
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