JOHANNESBURG (miningweeky.com) -- A new mining method, which avoids the wasteful shattering of precious metal during blasting, has the potential to boost gold and platinum mining significantly, says highly experienced research coordinator Dr RE (Robbie) Robinson. Selected blast mining (SBM), assisted by modern computer programming, could be re-piloted in a matter of months to become standard practice across South Africa's narrow-reef precious metals mines within a year, the former director of the National Institute for Metallurgy, now Mintek, says in a Mining Weekly Online video interview. (To watch this video interview, click on the icon on the picture accompanying this article).
Views: 282 MiningWeekly
How is coal mined? Read Full Story: http://www.spoonfeeding.in/2013/02/how-is-coal-mined-what-is-surface.html Mining is the process of removing coal from the ground. There are two types of mining: underground mining and surface mining. When the coal seam is fewer than 125 feet under the surface, it is mined by surface mining. Coal that is deeper than 125 feet is removed from the ground by underground mining. Underground mining is used when the coal seam lies deep in the earth. In an underground mine only some of the coal is removed. The coal that remains helps support the mine roof. Underground mines look like a system of tunnels. The tunnels are used for traveling throughout the mine, moving coal from place to place and allowing air to circulate in the mine. The coal that is mined is put on conveyor belts. The conveyor belts take the coal to the surface. There are three types of underground mines: slope, drift, and shaft. When the coal seam is close to the surface but too deep to use surface mining, a slope mine can be built. In a slope mine a tunnel slants down from the surface to the coal seam. A drift mine is built when the coal seam lies in the side of a hill or mountain. Drift mines may also be built in a surface mine that has become too deep. There are many drift mines in the eastern United States. The most common type of mine in Illinois is the shaft mine. These mines may be 125 to 1,000 feet deep. A large hole, or shaft, is drilled down into the ground until it reaches the coal seam.
Views: 122710 Spoon Feeding
This classic film, produced in the 1980's, uses archival footage to paint a picture of gold mining practices outside of Fairbanks in 1949. While today we would consider these practices obsolete, the methods of mining depicted in the film represent large-scale, mechanized versions of the same techniques employed by prospectors coming to Alaska and the Yukon in the 1890's.
Views: 4831 AlaskaNPS
Coal Curse (Hindi), a film by Paranjoy Guha Thakurta, supported by Greenpeace, takes you on a journey to the land of dirty coal and the trials and tribulations of the people working in the coal mines. The documentary explores the political economy of coal in contemporary India with the situation in Singrauli as a case study. It highlights the scandal, popularly called Coalgate, and the consequences of coal mining in the Singrauli region in central India. It raises questions as to whether extraction of coal is the best answer to secure India's energy needs.
Views: 8257 Greenpeace India
In which John Green teaches you about the Industrial Economy that arose in the United States after the Civil War. You know how when you're studying history, and you're reading along and everything seems safely in the past, and then BOOM you think, "Man, this suddenly seems very modern." For me, that moment in US History is the post-Reconstruction expansion of industrialism in America. After the Civil War, many of the changes in technology and ideas gave rise to this new industrialism. You'll learn about the rise of Captains of Industry (or Robber Barons) like Cornelius Vanderbilt, Andrew Carnegie, John D Rockefeller, and JP Morgan. You'll learn about trusts, combinations, and how the government responded to these new business practices. All this, plus John will cover how workers reacted to the changes in society and the early days of the labor movement. You'll learn about the Knights of Labor and Terence Powderly, and Samuel Gompers and the AFL. As a special bonus, someone gets beaten with a cane. AGAIN. What is it with American History and people getting beaten with canes? Support CrashCourse on Patreon: https://www.patreon.com/crashcourse
Views: 2031662 CrashCourse
For more on this and other stories please visit http://www.enca.com/ August 28 - As the mining industry meets this week to resolve issues afflicting the sector, there have been calls for mine bosses to break away from old colonial attitudes, in order for change to happen.
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EPAR TECHNOLOGY. EPAR is a revolutionary method of protecting physical objects against collision effects. Its operation consists in the transformation of a considerable part of kinetic energy of colliding objects into kinetic energy of an accumulating and dispersing converter. During the collision, instead of turning into a force destroying the object, the energy is transmitted to mechanical accumulators.EPAR FENDER (RAILWAY) Energy Accumulating Mechanical Converter A mechanism protecting railway vehicles against operational damages caused in the course of using the rolling stock. The principle of its functioning is based on the process of absorption, processing and dissipation of kinetic energy in continuous processes. The basic use of the mechanism is a railway fender allowing to mitigate the effects of mutual interactions bidirectionally and continuously between components of the rolling stock by absorbing the kinetic energy emerging during changes in velocity between particular components. MECHANIZED ROOF SUPPORT Mechanical Energy Converter A pneumatic-mechanical system of energy absorbers protecting miners and the shafts against damages caused by underground tremors. The essential part of the system protecting the linings is a pneumatic-mechanical mechanism which converts the powerful forces of the collapse into kinetic energy of the systems receiving the force. Initial interaction of forces and the transfer of energy are mitigated by intermediary pneumatic systems. CAR BUMPER Mechanical Converter of Kinetic Energy Appliances and subsystems increasing the safety of passengers in mechanical vehicles, especially in case of road collisions. The elementary utilitarian function of the devices in this group is ensuring safety for the passengers against the effects of road collisions with obstacles or other road users.ELEVATORS AND VERTICAL TRANSPORT Active Dynamic Absorber Crossover solution combining liquid and gas systems with mechanical systems. Depending on the use they may be safety components in elevators or an absorbing system receiving kinetic energy of objects generated by gantry systems, cranes etc. particularly when unloading goods and moving specially fragile load. CRASH CUSHION AND ROAD BARRIER Mechanical System of Absorbing And Dissipating A system protecting vehicles and road users against effects of collisions with stationary obstacles and preventing the vehicle from accidental leaving the marked limits of the road. The operation of the mechanism is based on the system transmitting mutual energy impingements. The initial direction of the impact energy is turned into the direction which is perpendicular to the simultaneous force interactions moving along the basis of the barrier. QUAY FENDERS Pneumatic Mechanical Absorber A set of autonomous mooring devices protecting ship hulls against damages during docking and the related increase in flow capacity of harbours due to the acceleration of procedures. LANDING GERA SHOCK ABSORBERS Kinetic Energy Converter Systems taking over the energy of the landing gear touching the ground the airplane is landing on. The system's operation involves the transformation of energy into the work of rotating kinetic energy converters. Application of the system does not only result in diminished stress and wear of the landing gear components but also positively influences stability, safety and the comfort of the moment of landing. SEISMIC SAFETY SYSTEMS Large Mass Energy Absorber System of large-mass absorbers of kinetic energy combined to form systems of high inertia. The main principle of the system's operation is absorbing kinetic energy of the moving ground in order to insulate the fundaments of the building from seismic impacts. The system is effective thanks to the combination of the process of kinetic energy absorption with moments of high moments of inertia at relatively low mass of protecting systems. Owing to the use of the system in lieu of standard pneumatic absorbing solutions, it is possible to maintain a stable position of the object by accumulating the energy of seismic interactions. HEAVY INDUSTRY APPLICATIONS Mechanical Rotor Absorber Multifunction system absorbing the kinetic energy generated during the operation of huge-scale industrial machines and technological production lines. The use of the solution is very wide, ranging from emergency stoppages of production and technological lines to protection of production infrastructure against damages resulting from impacts of the produced components and the received raw materials. The scope of the operation of the device is very wide and it depends on the assumed construction parameters. The essential feature of the solution is its reliability originating from its constructional simplicity and high tolerance for external factors. The unfortunate result is lowering the absorption capacity by 50%, however this value is sufficient.
Views: 4837 EparProject