DTH Drilling Air Capacity Question 1

[crcivil]

What kind of compressor (CFM,psi) should be employed to drill several 6.5" dia., 30 m. deep vertical bore holes in rock for the installation of ground anchors under a bridge. A track drill EMC 350 with an Air Rotary Head ARH 351 (Torque 270 kg-m) and a 5" down the hole hammer are to be used. I appreciate all your comments.

 

[BigHarvey]

21 m3 per minute and 21 bars

 

[crcivil]

Thank you very much for the advice BigHarvey, it is well appreciated.