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Pre-Split Drilling Services

Pre-Split Drilling Contractor for Controlled Excavation and Cleaner Final Walls

Pre-split drilling is used to create cleaner excavation boundaries and help reduce overbreak in rock excavation works where final wall quality, profile control and ground stability matter.

Queensland Drill & Blast Services provides pre-split drilling services for civil construction, quarry, infrastructure, road, rail and development projects where rock needs to be excavated with greater control and a more defined final result. This method is commonly used where the finished rock face matters, whether for structural, operational, safety or visual reasons.

Pre-split drilling is not just about drilling a row of holes beside an excavation line. It is about setting up the excavation to break where it is meant to break, helping preserve the intended wall line and reducing unnecessary disturbance outside the design boundary. Our team delivers pre-split drilling with a focus on drilling accuracy, spacing consistency and practical field execution.
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Why Choose QDBS for Pre-Split Drilling

Queensland Drill & Blast Services provides pre-split drilling services with a focus on wall control, drilling precision and the practical realities of controlled rock excavation.

Clients choose QDBS for pre-split drilling because we focus on:

Accurate drilling alignment for cleaner excavation boundaries
Practical understanding of wall control and reduced overbreak objectives
Consistent hole spacing and drilling quality across the pattern
Better support for controlled excavation in sensitive or high-precision environments
Reliable field delivery across civil, quarry and infrastructure works
Clear coordination with engineers, supervisors and site teams

Our approach is built around understanding the final excavation outcome required, then drilling in a way that helps achieve it.
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Why Pre-Split Drilling Is Used

Pre-split drilling is used where rock excavation needs to be controlled more precisely and the final wall outcome matters. It helps define the intended excavation boundary before the main blast or excavation proceeds, creating a plane of weakness that encourages the rock to break more cleanly along the desired line.

Without proper wall control, excavation can run past the intended boundary, leading to overbreak, unstable faces, extra scaling, more cleanup and reduced confidence in the finished rock profile. Pre-split drilling helps reduce those issues by improving how the rock behaves at the edge of the excavation.

A well-executed pre-split drilling programme can help achieve:

Cleaner final walls and more defined excavation limits
Reduced overbreak outside the intended rock profile
Better wall control in sensitive excavation areas
Improved stability and presentation of finished rock faces
Less remedial work after blasting or excavation
More predictable outcomes where excavation boundaries matter

Where the job depends on a cleaner rock face and tighter excavation control, pre-split drilling can play a critical role.
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Industries We Service

Queensland Drill & Blast Services provides pre-split drilling across industries where final wall quality, controlled excavation and reduced overbreak are important.

Civil construction

Pre-split drilling for controlled excavation boundaries, road cuttings, basement works and staged civil projects.

Quarries

Wall control drilling to support cleaner faces, more predictable excavation outcomes and reduced unnecessary disturbance.

Transport & Rail

Controlled profile drilling for corridor works, cuttings and infrastructure excavation near sensitive assets.

Mining & Rehabilitation

Pre-split drilling to support controlled excavation edges and improved final wall definition in selected hard rock environments.

Infrastructure

Pre-split drilling for projects where final rock lines, structural interface zones and excavation precision matter.

Subdivisions & Development

Controlled rock excavation support where tighter boundaries, neighbouring assets and cleaner cut profiles are important.
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Our Drill Rigs & Machines

Our fleet includes multiple Epiroc SmartROC surface drill rigs, specifically the SmartROC T35, T40, and T45 platforms, allowing us to deliver reliable drilling across civil, quarry, mining, and infrastructure projects. These rigs are well suited to controlled drilling environments where alignment, spacing consistency and repeatable hole quality are critical to the final excavation result.

Precision drilling for better wall control

Our SmartROC T35, T40, and T45 drill rigs provide consistent drilling performance across projects where final wall quality and excavation control matter. Their advanced control systems support accurate collar positioning, controlled drilling depth and improved drilling repeatability, helping maintain the integrity of the pre-split line.

Intelligent rig control and drilling consistency

SmartROC drill rigs use advanced rig control systems to monitor drilling performance in real time, reducing variability and supporting more consistent alignment and hole quality. This is especially important in pre-split drilling, where small inaccuracies can affect the final wall outcome.
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Scalable fleet for small and large programmes

With multiple SmartROC rigs available, we can deploy single or multi-rig drilling operations depending on project size, programme needs and site conditions. This allows us to support both targeted wall-control works and broader excavation programmes without compromising drilling consistency.

Maintained for reliability and operational uptime

All drill rigs are supported by structured preventative maintenance systems, daily inspections and dedicated fleet management. This helps keep equipment reliable, accurate and ready for deployment across demanding controlled drilling environments.
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Reliable Mobilisation Across Australia

QLD
NSW
SA
NT
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Brisbane · Gold Coast · Sunshine Coast · Cairns · Townsville · Toowoomba · Rockhampton · Gladstone · Bundaberg · Mackay · Hervey Bay · Wide Bay
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Sydney · Newcastle · Wollongong · Coffs Harbour · Tamworth · Port Macquarie · Byron Bay · Orange · Bathurst · Albury · Mudgee
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Adelaide · Mount Gambier · Port Augusta · Whyalla · Port Lincoln · Riverland · Barossa Valley · Flinders Ranges · Yorke Peninsula · Limestone Coast · Fleurieu Peninsula
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Darwin · Katherine · Alice Springs · Tennant Creek
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Our crews are experienced in working across metropolitan, regional and remote environments. We mobilise efficiently with the equipment, safety systems and operational planning needed to support pre-split drilling projects across multiple states.

Whether working on road cuttings, quarry faces, infrastructure excavation zones or remote hard rock developments, we bring the same disciplined approach to drilling accuracy and controlled field execution.

Uptime & Maintenance Systems

Most delays are not caused by the method. They are caused by breakdowns, servicing gaps and poor equipment readiness.

Our in-house maintenance division helps maximise reliability and uptime, with a strong focus on safety, efficiency and compliance, including:
24/7 support from experienced maintenance staff with fully equipped service vehicles
Strict preventative maintenance schedule to minimise downtime
OEM parts supported by a strong supplier partnership
Full in-house capabilities (hose fabrication, drifter rebuilds, full servicing)
MEX software used for daily defect reporting and pre-start checks