napadna fronta definiše odakle se počinje sa iskopom (pravac napredovanja iskopa), fraza se ne koristi često u geologiji
front (čelo, lice) - front; ref. Građevinski r., B. Vukičević

http://milanocittadellescienze.it/html/mostre/sempione/mostr...
The front of the excavation went forward, in eight hour shifts, with a battery of four Brandt perforators mounted on a trolley that used mine burners to explode the rock with dynamite. Behind this front of attack the enlargement of the galleries was done manually digging with iron wedges and mallets, vertical holes in the roof and joining them up to form a continuous cap.

http://riunet.upv.es/bitstream/handle/10251/30065/PROJECT.pd...
- To humidify the front of attack of the excavation to eliminate the powder that takes place as much as possible

http://www.tunneltalk.com/Bodio-tunnel-lining-wurms-Switzerl...
Powerful gripper TBMs come into their own on long rock drives where their potential speed of advance provides distinct advantages over the alternatives. The disadvantages of the single face of attack however remain. One of the greatest disadvantages is waiting for hole through of excavation before working a second and third pass to install finishing works.