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Mine Caps
Mine caps are typically used to prevent access to old, abandoned mines. People, especially the young, like to explore their surroundings but may not fully understand the dangers inherent within, and surrounding, a mine. Reasons for mine capping 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. These fail over time, creating sinkholes, that may not be visible on the surface, until enough weight collapses it. Law requirements National and regional/local laws often dictate certain aspects in the capping process, such as allowances for bats to have access. The type of mine, water table, geology, etc. are all considered when choosing which type of cap will be used for a given mine entrance. Types Concrete caps Concrete continues to be the preferred method for capping vertical shafts. Consi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abandoned Mine
''Abandoned Mine'', also known as ''The Mine'', is a 2012 horror film written and directed by Jeff Chamberlain. The film premiered in Sandy, Utah in September 2012 and had a limited release on August 15, 2013. Plot Five friends explore a supposedly haunted mine to celebrate Halloween, exactly one hundred years after a family was murdered in the mine. They soon find to their horror that the ghostly rumors may be true as they fight for survival. Cast * Alexa Vega as Sharon, Brad's new girlfriend * Reiley McClendon as Brad, the trickster * Saige Thompson as Laurie, Brad's ex-girlfriend * Charan Prabhakar as Ethan, an Indian friend of Laurie * Adam Hendershott as Jim, Brad's best friend * Valerie C. Walker as Kelly, a store clerk * Joseph Batzel as Jarvis, the ghost of the mine * Jordan Chamberlain as Store customer, a customer at Sharon's store * Cody Walker as Thomas, an always-happy store clerk Development The film was originally titled ''The Mine'', before the title wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mine (mining)
Mining is the extraction of valuable geological materials and minerals from the surface of the Earth. Mining is required to obtain most materials that cannot be grown through agricultural processes, or feasibly created artificially in a laboratory or factory. Ores recovered by mining include metals, coal, oil shale, gemstones, limestone, chalk, dimension stone, rock salt, potash, gravel, and clay. The ore must be a rock or mineral that contains valuable constituent, can be extracted or mined and sold for profit. Mining in a wider sense includes extraction of any non-renewable resource such as petroleum, natural gas, or even water. Modern mining processes involve prospecting for ore bodies, analysis of the profit potential of a proposed mine, extraction of the desired materials, and final reclamation or restoration of the land after the mine is closed. Mining materials are often obtained from ore bodies, lodes, veins, seams, reefs, or placer deposits. The exploitation of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cave-in
A cave-in is a collapse of a geologic formation, mine or structure which may occur during mining, tunneling, or steep-walled excavation such as trenching. Geologic structures prone to spontaneous cave-ins include alvar, tsingy and other limestone formations, but can also include lava tubes and a variety of other subsurface rock formations. Glacier caves and other ice formations are very prone to collapse from exposure to warm temperatures or running water. In mining, the term roof fall is used to refer to many types of collapses, ranging from the fall of a single flake of shale to collapses that form sink holes that reach to the surface. However, roof falls in mining are not all accidental. In longwall mining and retreat mining, miners systematically remove all support from under large areas of the mine roof, allowing it to settle just beyond the work area. The goal in such mining methods is not to prevent roof fall and the ensuing surface subsidence, but rather to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sinkhole
A sinkhole is a depression or hole in the ground caused by some form of collapse of the surface layer. The term is sometimes used to refer to doline, enclosed depressions that are also known as shakeholes, and to openings where surface water enters into underground passages known as ''ponor'', swallow hole or swallet. A ''cenote'' is a type of sinkhole that exposes groundwater underneath. ''Sink'', and ''stream sink'' are more general terms for sites that drain surface water, possibly by infiltration into sediment or crumbled rock. Most sinkholes are caused by Karst topography, karst processes – the chemical dissolution of carbonate rocks, collapse or suffosion processes. Sinkholes are usually circular and vary in size from tens to hundreds of Metre, meters both in diameter and depth, and vary in form from soil-lined bowls to bedrock-edged chasms. Sinkholes may form gradually or suddenly, and are found worldwide. Formation Natural processes Sinkholes may capture surf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water Table
The water table is the upper surface of the phreatic zone or zone of saturation. The zone of saturation is where the pores and fractures of the ground are saturated with groundwater, which may be fresh, saline, or brackish, depending on the locality. It can also be simply explained as the depth below which the ground is saturated. The portion above the water table is the vadose zone. It may be visualized as the "surface" of the subsurface materials that are saturated with groundwater in a given vicinity. In coarse soils, the water table settles at the surface where the water Hydraulic head, pressure head is equal to the atmospheric pressure (where gauge pressure = 0). In soils where capillary action is strong, the water table is pulled upward, forming a capillary fringe. The groundwater may be from precipitation or from more distant groundwater flowing into the aquifer. In areas with sufficient precipitation, water infiltrates through pore spaces in the soil, passing through t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wine Bottle
A wine bottle is a bottle, generally a glass bottle, that is used for holding wine. Some wines are fermentation (wine), fermented in the bottle while others are bottled only after fermentation. Recently the bottle has become a standard unit of volume to describe sales in the wine industry, measuring . Wine bottles are produced, however, in a variety of volumes and shapes. Wine bottles are traditionally sealed with a cork (wine), cork, but Screw cap (wine), screw-top caps are becoming popular, and there are several alternative wine closures, other methods used to seal a bottle. Sizes Many traditional wine bottle sizes are named for Bible, Biblical kings and historical figures. The chart below lists the sizes of various wine bottles in multiples relating to a standard bottle of wine, which is (six 125 mL servings). The "wineglassful"—an official unit of the Apothecaries' system, apothecaries' system of weights—is much smaller at . Most List of Champagne houses, champagne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adit
An adit (from Latin ''aditus'', entrance) or stulm is a horizontal or nearly horizontal passage to an underground mine. Miners can use adits for access, drainage, ventilation, and extracting minerals at the lowest convenient level. Adits are also used to explore for mineral veins. Although most strongly associated with mining, the term ''adit'' is sometimes also used in the context of underground excavation for non-mining purposes; for example, to refer to smaller underground passageways excavated for underground metro systems, to provide pedestrian access to stations (pedestrian adits), and for access required during construction (construction adits). Construction Adits are driven into the side of a hill or mountain, and are often used when an ore body is located inside the mountain but above the adjacent valley floor or coastal plain. In cases where the mineral vein outcrops at the surface, the adit may follow the lode or vein until it is worked out, in which case the ad ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Petherick Mine Cap 800x600 ...
Petherick ( ) may refer to: People *Alice Hext (1865–1939), née Petherick, Cornish landowner *Edward Petherick (1847–1917), Australian book collector * Horace William Petherick (1839-1919). A British artist, book illustrator, violin enthusiast and father of Rosa C. Petherick *John Petherick (1813–1882), Welsh traveller *Maurice Petherick (1894–1985), British politician * Peter Petherick (1942–2015), New Zealand cricketer *Richard Petherick (born 1986), New Zealand hockey player * Rosa C. Petherick (1871–1931), British book illustrator * Vernon Petherick (1876–1945), Australian politician Places *Hundred of Petherick, a cadastral unit in South Australia **Petherick, South Australia, a locality *Little Petherick Little Petherick () is a village and former civil parish, now in the parish of St Issey, in north Cornwall, England, United Kingdom. It is situated south of Padstow and west of Wadebridge. Little Petherick lies in the valley of Little Petheri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Keweenaw County, Michigan
Keweenaw County (, ) is a County (United States), county in the western Upper Peninsula of the U.S. state of Michigan. As of the 2020 United States census, 2020 census, the county's population was 2,046, making it Michigan's least populous county. It is also the state's largest county by total area, including the waters of Lake Superior, as well as the state's northernmost county. The county seat is Eagle River, Michigan, Eagle River. Located at the northeastern end of the Keweenaw Peninsula, Keweenaw County is part of the Houghton micropolitan area, Michigan, Houghton, Michigan micropolitan area. Keweenaw County contains two National Park Service units: Isle Royale National Park and Keweenaw National Historical Park. The county is part of Michigan's Copper Country region, an area where Copper mining in Michigan, copper mining was prevalent from the 1840s to the 1960s. History The county was set off and organized in 1861. It is believed "Keweenaw" is a corruption of an Ojib ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
