Search results
Results from the WOW.Com Content Network
Shaft mining or shaft sinking is the action of excavating a mine shaft from the top down, where there is initially no access to the bottom. [1] Shallow shafts , typically sunk for civil engineering projects, differ greatly in execution method from deep shafts, typically sunk for mining projects.
Headframe of the #1 Shaft at Oyuu Tolgoi. A steel headframe is less expensive than a concrete headframe; the tallest steel headframe measures 87 m. [4] Steel headframes are more adaptable to modifications (making any construction errors easier to remedy), and are considerably lighter, requiring less substantial foundations.
Shaft sinking was the most dangerous and most difficult form of mining in ancient Rome. Due to its high cost, it was only used to collect the most valuable metals in Roman society. This technique involved digging tunnels underground, allowing workers to extract the ore.
Before the start of World War Two, John Branner Newsom, a California mining engineer, invented and patented a core drill that could take out large diameter cores (>5 ft.) up to 10 feet in length for mining shafts. [4] This type of shaft-sinking drill is no longer in use as it was cumbersome, prone to jamming with cuttings, thus slow compared to ...
The area of the former Fryderyk Smelting Works (formerly the Zamet Mechanical Works, currently Zamet Budowa Maszyn S.A.) is located in the north-western district of Tarnowskie Góry – Strzybnica [] – between Zagórska Street [] (part of national road 11 []), Father Edward Płonka Street (formerly Metalowców Street), [4] Kościelna Street, and – until 22 December 2016 [5] – Zametowska ...
The shafts of the three concessions established in the mid-19th century. The Ronchamp colliery shafts (French, Les puits des houillères de Ronchamp) are a series of collieries undertaken by the various mining companies in the Ronchamp coalfield between the early 19th and mid-20th centuries at Ronchamp, Champagney, and Magny-Danigon, in the Haute-Saône département of France.
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!
To achieve the first goal, five steam pumps with a total capacity of 79.29 m 3 /min were used – three drainage machines at the drainage shafts: Schmidt I [75] [76] (sinking began in 1855, [74] drainage machine put into use in 1858, [77] in 1859 riveted pipes made of 3 ⁄ 8-inch (9.5 mm) thick boiler plate with a diameter of 36 inches (910 mm ...