Search results
Results From The WOW.Com Content Network
Hundreds gather at the site of the Twin Shaft disaster immediately after the cave-in (1896). The Twin Shaft disaster occurred in the Newton Coal Company's Twin Shaft Colliery in Pittston, Pennsylvania, United States, on June 28, 1896, when a massive cave-in killed fifty-eight miners.
The disaster occurred when a surface cave-in at the mine's easternmost end tapped into mud that was a direct connection to Foley Lake. In less than 20 minutes the mineshaft flooded to within 15 to 20 feet (4.6 to 6.1 m) of the surface. Seven men made it to ground level, while 41 were overcome by the water or trapped in mud.
The Windows 98 version of Microsoft Minesweeper. In early versions of the game, a cheat code let players peek beneath the tiles. [8]By the year 2000, the game had been given the name of Flower Field instead of Minesweeper in some translations of Windows 2000 (like the Italian version), featuring flowers instead of mines.
Cave-ins, poor air quality, wet slippery surfaces, etc. are real dangers when entering a mine, but even the surrounding area can be dangerous.Older mines may have been covered with logs or wooden beams with loose rock and soil over the top. [1]
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.
There are two principal phases of underground mining: development mining and production mining. Development mining is composed of excavation almost entirely in (non-valuable) waste rock in order to gain access to the orebody. There are six steps in development mining: remove previously blasted material (muck out round), scaling (removing any unstable slabs of rock hanging from the roof and ...
As part of the Witwatersrand, the largest gold mineralization on earth, Mponeng is the result of the discovery of the basin by Europeans. Beginning in the 1850-70s a series of mineral discoveries were made in the area, including those of Pieter Jacobus Marais panning gold from a river and Henry Lewis finding quartz and gold vein on a farm, that led to the Witwatersrand Gold Rush in 1886. [9]
A lava cave is any cave formed in volcanic rock, though it typically means caves formed by volcanic processes, which are more properly termed volcanic caves. Sea caves , and other sorts of erosional and crevice caves, may be formed in volcanic rocks, but through non-volcanic processes and usually long after the volcanic rock was emplaced.