BLIND DRILLING

What is Blind Drilling?

Blind Drilling refers to drilling a large diameter shaft from the surface. (No underground access is required.) A Blind-Drilled Shaft can be constructed prior to the underground advancement and off the critical path. Personnel are not required to enter the shaft during the drilling process. Frontier-Kemper has completed more than 5,000 ft. of Blind-Drilled Shafts across the US and has the capacity to drill diameters ranging from 6 ft.–20 ft. and depths of more than 2000 ft. with special applications.

FK350MT

To provide solutions for mechanically excavated, deep, large-diameter, Blind-Drilled Shafts, Frontier-Kemper, Wirth GmbH, and ACI entered a joint cooperation agreement to build a Blind Shaft Drilling System. The result is the FK350MT; one of the largest, safest, and most efficient A-Frame type drilling rigs in North America. As currently configured, the FK350MT is capable of drilling shaft diameters up to 20 ft. and depths of more than 1,500 ft.

CURRENT & RECENT BLIND DRILLING PROJECTS:
Barrick NVR & SVR

BLIND DRILLING TRACK RECORD:

Completed: 5,005 VF
Years of Expertise: 7 years

World Record:
20-ft. Diameter, 980 VF
February 23, 2011
Sugar Camp Mine

North American Record:
16-ft. Diameter, 1764 VF
February 20, 2014
Cortez Mine

SHAFT LINING CAPABILITIES:

  • Steel
  • Concrete
  • Shotcrete
  • Steel/Concrete Composite
  • Other Coatings