Search results
Results From The WOW.Com Content Network
Long hole stoping as the name suggests uses holes drilled by a production drill to a predetermined pattern as designed by a mining engineer. [11] Long hole stoping is a highly selective and productive method of mining and can cater for varying ore thicknesses and dips (0 – 90 degree).
Exploration began in 1986, and production started in 2008. The mine is composed of two open pits, with the proceeds of the operation funding an underground mining operation, accessed by a ramp from surface and utilizing both transverse and longitudinal long-hole stoping methods.
VRM/ VCR: Vertical retreat mining (VRM) also known as Vertical crater retreat (VCR) is a method where mine is divided in vertical zones [clarification needed] with depth of about 50 meters using open stoping, bottom-up mining. Long-hole large-diameter holes are drilled vertically into the ore body from the top using in-the-hole (ITH) [5 ...
The study demonstrated that substantial tonnage could be mined via more productive and cost effective long hole open stoping methods. [17] Production rose by 5% to 258,000oz in 2012, as Sunrise Dam recovered from flood-related disruptions the previous year, together with improved grades from the North Wall Cutback area of the pit.
At around 600 miles wide and up to 6,000 meters (nearly four miles) deep, the Drake is objectively a vast body of water. To us, that is. To the planet as a whole, less so.
Their LaRonde mine expansion sees open stopes down to a depth of over 3,000 m (9,800 ft), the deepest long hole open stopes in the world. The deepest mine in Europe is the 16th shaft of the uranium mines in Příbram , Czech Republic at 1,838 m (6,030 ft), [ 6 ] second is Bergwerk Saar in Saarland , Germany at 1,750 meters.
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
TIL there were different variations of The Simpsons opening theme because starting with season 2 they made 3 versions: the full 1-minute-15-second-long version, a 45-second and a 25-second.