Compressed air for tunnelling and deep excavation works

Compressed air powers many of the pneumatic tools used during excavation and support installation. This includes rock drills, air breakers and other air impact tools used for drilling, breaking and anchoring activities within tunnels and deep excavations.

Selecting a diesel air compressor usually involves reviewing airflow demand, pressure requirements and the number of tools expected to operate simultaneously. Site conditions, hose length and project duration should also be considered during planning. Equipment choice should be confirmed with a competent person or engineer to ensure safe operation in confined or underground environments.

Long hose runs, sharp bends or poor routing can reduce air pressure before it reaches the tool. Even when a compressor has sufficient capacity, an inefficient hose layout can limit the usable airflow at the work face. Hose placement and routing should be planned and regularly inspected to maintain safe and efficient operation.

Typical examples include rock drills, air breakers, bolting tools and other pneumatic hand tools used for excavation and structural support installation during tunnelling activities. Use of these tools should follow manufacturer guidance and site-specific safety requirements.

Pumps are often used when water accumulates in deep excavation areas or tunnels. Removing water helps keep the work face accessible and allows crews to continue drilling, breaking and support installation activities safely. Pump selection, placement, and operation should be assessed by competent personnel to minimise safety risks in underground or confined spaces.