Dumas :: Mine Development

By: Dumas Mining Contracting  09-12-2011
Keywords: Shaft Collars

Dumas’ mine development services include:

  • Exploration, preproduction and production development using trackless mechanized equipment for declines, inclines and lateral development
  • Track development
  • Bulk sampling
  • Mine reopening, dewatering and rehabilitation

Shaft Sinking

Dumas is one of Canada’s leading shaft sinking contractors and the sole shaft-sinking contractor in Peru. Dumas has the experience and knowledge to provide all shaft services including:

  • Shaft sinking of production shafts, service shafts and ventilation shafts
  • Concrete lined shafts, timber shafts and unlined shafts
  • Shaft rehabilitation
  • Shaft deepening
  • Shaft collars and presink
  • Internal shaft sinking (winze sinking)
  • Independent shaft inspection services

Lateral Development

Dumas’ crews of experienced hard rock miners can provide:

  • Track and trackless development of any size
  • Ramp (Inclines/Declines)
  • Exploration, development, and production drifts

We safely and responsibly accelerate the lateral development process to ensure efficient and timely access to the ore bodies to meet our clients’ expected production targets.


Dumas is a leading provider of conventional open raising methods and mechanized raise climbing. We can design and construct ventilation, manways, ore pass and waste pass raises. Our mechanized raise climbers are used in some of the deepest hard rock mines in North America and have successfully completed some of the most challenging raises on the continent.

Longhole Drilling

From utility holes to drop raises and small ventilation raises, our longhole drilling services maintain the highest level of accuracy to save considerable time and resources. With the best In-The-Hole drills on the market, Dumas is capable of drilling boreholes of 5 to 74 centimetres in diameter and up to 610 metres in length.

Keywords: Shaft Collars

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Other products and services from Dumas Mining Contracting


Dumas :: Mine Construction

Our underground construction services consist of track or trackless preparation, culvert and liner plate installation for unstable ground, crushing and conveying systems, chutes, grizzlies, rock breakers, paste fill lines, fuel lines, loading pockets and any type of refuge station or underground shop required.


Dumas :: Production Mining

The mining method is determined mainly by the geological conditions, characteristics of the mineral deposit and the limits imposed by safety, technology, and economics. To complement the mine engineering and design stages, Dumas has the experience and capacity to recommend mining methods to complete overall mine designs.


Dumas :: Services

We strive to complete projects ahead of schedule and on budget by leveraging decades of operational expertise to ensure that we always meet our clients' needs across a variety of operational conditions. Dumas offers the full range of underground hard rock mining contracting services in mine construction, mine development, production mining, mine services and engineering. Is dedicated to fulfilling our clients’ engineering and operating needs.