Ann: Results of Meeting, page-78

Drill speed:
A normal drill speed for NQ drilling is around 5-10 meters per hour without stop. The drill speed depends on numerous factors, for example rock type, homogeneous rock, wear of the drill bit, flow of water, depth of drilling, terrain and more. An example of drilling in one 24-hour period: 7,5 meters x 24 hours = 187,5 meter/day. To drill 2500 meters you will need the following numbers of days before finishing: 2500 meters/187,5 meters = 13,5 days with no stops for maintenance.

https://goldexplorers.wordpress.com/2010/11/27/drill-speed-and-drill-types/