1. Drilling

We describe short drillings that precede, or complete, mining or geotechnical surveys. Oil drilling is excluded.

Also known as "rotary drilling", this type of drilling involves the rapid destruction of the ground in place and the evacuation of the debris produced by this destruction.

• Mining reconnaissance

  Rotary drilling is mainly used in the following applications:

  • rapid drilling, before coring, in overburden of no geological interest;

  • taking reworked samples for the laboratory ;

  • pilot holes to guide large-diameter wideners (gallery ventilation shafts).

• Geotechnical reconnaissance

  Rotary is used for :...