Search results
Results from the WOW.Com Content Network
Continuous miners – electric, self-propelled digging machines that cut material using carbide-tipped bits on a horizontal rotating drum. Longwall shearers – a material-cutting machine that moves back and forth on an armored face conveyor running parallel to the coal or other material being mined.
Globally, it is listed as Least Concern on the IUCN Red List [1] but is a Conservation Strategy Species in Oregon [2] and Fully Protected in California [3] The species is known by a variety of names, such as ring-tailed cat, miner's cat, civet cat, and cacomistle (or cacomixtle), though the last of these can refer to B. sumichrasti.
During servicing, the "continuous" miner moves to another face. Some continuous miners can bolt and rock dust the face, two major components of servicing, while cutting coal, while a trained crew may be able to advance ventilation, to truly earn the "continuous" label. However, very few mines are able to achieve it. Most continuous mining ...
A potential disadvantage is that the tribute miners share the risk of the mining venture, such as downside variability of ore grade and the actual hours of work and other costs incurred during mining. A tributer needed skills, other than purely mining skills, to assess the likely value of production in the ground to be worked, under the tribute ...
"My claim, Sir!" A prospector defends his claim at the Comstock Lode, 1861.. Miners and prospectors in the California Gold Rush of 1849 found themselves in a legal vacuum. . Although the US federal government had laws governing the leasing of mineral land, the United States had only recently acquired California by the Treaty of Guadalupe Hidalgo, and had little presence in the newly acquired ...
Shortwall mining – A coal mining method that accounts for less than 1% of deep coal production, shortwall involves the use of a continuous mining machine with moveable roof supports, similar to longwall. The continuous miner shears coal panels 150–200 feet wide and more than a half-mile long, depending on other things like the strata of the ...
Thus, the SCCL became a Government Company under the Companies Act in 1956. It is named after the village Singareni in Khammam district , Telangana where the coal mines are first noticed . The manner of extending financial assistance for expansion of SCCL by the Govt. of A.P., and the Govt. of India during V plan period was agreed upon in the ...
Automated mining involves the removal of human labor from the mining process. [1] The mining industry is in the transition towards automation.It can still require a large amount of human capital, particularly in the developing world where labor costs are low so there is less incentive to increase efficiency.