What do northern California grapes and shotcrete have in common?
Outstanding Underground Project: The Center for National Response
In 1953, the Memorial Tunnel in Standard, WV, was constructed as a two-lane, 2800 ft (853 m) tunnel with semi-transverse ventilation.
Tiber Creek Tunnel Project
Ellicott City, MD, enjoys a rich and varied history, from its origin as the tiny trade center of Ellicott?s Mills to the present seat of rapidly urbanizing Howard County.
Structural Shotcrete Overhead
As a contractor, I have frequently been asked if shotcrete can be used for overhead applications.
Slope Stabilization in an Open Pit Mine
The government of the Republic of Botswana and De Beers Centenary AG own the Debswana Diamond Company in equal share.
Overhead Shotcrete
When you say overhead, people invariably think of fixed costs, salaries, and the general costs of running a business.
Freeport’s New Barmac Delivers High-Quality Shotcrete Sand
In November 1936, during a climbing expedition to the glacier-capped peaks of central New Guinea, Dutch Petroleum Geologist Jean Jaques Dozy discovered a massive copper mineralized outcrop
Shotcrete Spraying Machines for Immediate Support in Tunnels
Tunnels are important elements in modern industrial society.
Robotic Shotcrete Applications for Mining and Tunneling
If a robotic applicator is mentioned in connection with mining or tunneling and shotcrete, what is meant is an apparatus used to hold and control a spraying nozzle. Why should this be necessary when a man can do the same work? Tunneling and mining development are intrin-sically hazardous forms of construction. When shotcrete is used as initial temporary support after blasting, using a mechanical arm to extend into an unsupported area is a great enhancement to personnel safety.
Underground Shotcrete Quality Assessment
During the 1990s, the use of dry-mix shotcrete as a tool for ground support became much more prevalent in Canadian hardrock mines. With this increase in dry-mix shotcrete use came the need to develop a practical and accurate method for determining the quality of the in-place shotcrete. This report summarizes the results of a study undertaken to provide the basis of an under-ground shotcrete quality assessment program for hardrock mines.