Down-the-hole drilling RIGS in highway tunnel construction

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In highway tunnel construction—a complex systematic project—down the hole drilling rig undertake key drilling tasks. Tunnel construction requires excavating passages through rocky mountains, demanding extremely high drilling precision and efficiency.

DTH drills use advanced guiding systems to ensure hole verticality and directional accuracy, preventing deviations from affecting tunnel shaping quality. In hard-rock tunnel construction, they drill 90-150mm diameter and 3-5m deep blast holes for smooth blasting and pre-splitting, reducing blasting disturbance to surrounding rock and maintaining stability.

 

Meanwhile:

 

  1. DTH drills are increasingly automated, easy to operate, and reduce workers’ labor intensity.
  2. Their high automation improves tunnel construction efficiency by streamlining operations.
  3. The precision drilling supports stable surrounding rock, ensuring safe and high-quality tunnel projects.down the hole drilling rig