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  • Strip Mining an overview ScienceDirect Topics

    In certain cases of mining multiple coal seams from one pit, a coal seam can provide the boundary between the prestrip and strip elevations. In a relatively new technique that originated in 1970s to early 1980s, explosives are used to move or throw the overburden into the previous pit in a

  • Strip mining Britannica

    Strip mining, removal of soil and rock (overburden) above a layer or seam (particularly coal), followed by the removal of the exposed mineral.. The common strip-mining techniques are classified as area mining or contour mining on the basis of the deposit geometry and type. The cycle of operations for both techniques consists of vegetation clearing, soil removal, drilling and blasting of

  • Strip Mining Citizens Coal Council

    Strip mining is a type of surface mining where the overlying vegetation, rock, and soil (overburden) is removed in order to reach the underlying coal seam, which usually lies a few feet beneath the surface. Explosives are used to fracture any overlying rock, and then heavy machinery is used to remove the overburden and dump it into a nearby area.

  • Chapter 2: The Environmental Effects of Strip Mining The

    Open Pit Mining. Open pit mining is similar to area mining. The technique is common in the western United States (and other parts of the world) where very thick — 50 to 100 foot — coal seams exist. Open pit mines are usually large operations. Production levels may exceed 10 million tons of coal per year.. The thick coal seams found at these large mines ensure that the amount of land

  • Strip-auger method of mining thin seams of

    The present invention relates to a combination of open cast strip mining and auger mining of thin seams of hydrocarbonaceous deposits. In this mining method, a first working pit is stripped to expose the deposit, the hydrocarbonaceous material extracted and the exposed deposit seam face of at least one highwall is auger mined.

  • Coal seam Energy Education

    A coal seam is a dark brown or black banded deposit of coal that is visible within layers of rock. These seams are located underground and can be mined using either deep mining or strip mining techniques depending on their proximity to the surface. These seams undergo normal coal formation and serve as a conventional coal resource.The reserves of coal are immense, and are the largest of all of

  • (PDF) Surface Mine Design

    "Strip mining" is the practice of mining a seam of mineral, by first removing a long strip of overlying soil and rock (the overburden). It is most commonly used to mine coal and

  • “Giant Shovel on I-70”Ohio Strip Mine Fight: 1973 The

    May 31, 2017· Strip mining was then about to move west in a big way, to states such as Montana and Wyoming, where the land was flat to gently rolling, the coal seams thick, and the odds against reclamation even greater.

  • Plundering Appalachia The Tragedy of Mountaintop-Removal

    Mountaintop removal is strip-mining on steroids. Massive dump trucks, huge bulldozers, and ten-story-high draglines can undo in months what geological processes took millions of years to build. Typically, multiple coal seams are exposed as a mountaintop-removal operation dismantles the

  • Strip Mining Citizens Coal Council

    Strip mining is a type of surface mining where the overlying vegetation, rock, and soil (overburden) is removed in order to reach the underlying coal seam, which usually lies a few feet beneath the surface. Explosives are used to fracture any overlying rock, and

  • What is Strip Mining? Definition from Safeopedia

    Strip mining is a mineral-extraction process in which a layer or seam of undesired material (called “overburden”) is removed from the surface of an area to allow efficient access to a desired material existing underneath the layer being stripped. As the process suggests, it is a form of surface mining, and it is primarily used to extract

  • Coal seam Energy Education

    A coal seam is a dark brown or black banded deposit of coal that is visible within layers of rock. These seams are located underground and can be mined using either deep mining or strip mining techniques depending on their proximity to the surface. These seams undergo normal coal formation and serve as a conventional coal resource.The reserves of coal are immense, and are the largest of all of

  • Kentucky was devastated for decades by mountaintop removal

    Feb 13, 2020· At that time, strip mining was a Wild West. “There were wildcatters, stealing 20 to 30 thousand dollars of coal in a weekend,” Angel says. Putting the land back together was often an

  • Strip-auger method of mining thin seams of

    The present invention relates to a combination of open cast strip mining and auger mining of thin seams of hydrocarbonaceous deposits. In this mining method, a first working pit is stripped to expose the deposit, the hydrocarbonaceous material extracted and the exposed deposit seam face of at least one highwall is auger mined.

  • Coal Surface Mining, Contour Mining

    The Contour or Bench method of surface or strip mining is usually associated with coal, where a seam or multiple seams are located at a certain elevation or elevations through a mountain or hill. Contour mining allows for the extraction of coal from mountainous areas, where it is not feasible to extract the entire seam, using mountain top

  • The Strip-Mine Reclamation Program in Ohio

    ground mining, usually no more than 60 per cent of a seam is extracted; by strip mining, 90 to 95 per cent of the total is gotten. Strip mining began in Ohio in 1914 and expanded slowly until World War II. The demand for coal to fight the war led to a substantial increase in mining,

  • Economic Surface Mining of Multiple Seams

    Area strip-mining is practiced on relatively flat terrain. A 'box cut' is made through the overburden to expose the top coal seam. Successive parallel cuts ore then made and the overburden spoiled in the previous cut. Contour strip-mining is practiced 177 where the seams oceur in

  • (PDF) Surface Mine Design

    "Strip mining" is the practice of mining a seam of mineral, by first removing a long strip of overlying soil and rock (the overburden). It is most commonly used to mine coal and

  • Interactive map of coal mines in West Virginia American

    The West Virginia Geological and Economic Survey provides an interactive map of underground and surface coal mining activity in West Virginia. The map shows areas of active and historical coal mining in both underground and surface mines, with separate colors for auger and highwall mining. Users can zoom in on mining areas and retrieve information for individual mines,

  • Chapter 1: Introduction The Strip Mining Handbook

    Strip Mining and the Environment From its earliest beginnings, strip mining has been synonymous with environmental controversy. Grossly underregulated coal mining in the 1960's and 70's spawned one of the greatest abuses of the environ­ ment in the history of the United States. The statistics of strip mine abuse numb the mind and overwhelm the

  • Solved: 1) Explosives Are Used In Strip Mining To A) Break

    Question: 1) Explosives Are Used In Strip Mining To A) Break Up Rocks Overlaying Coal Seams B) Open The Pit C) Break Up Coal So It Can Be Removed. This problem has been solved! See the answer. 1) explosives are used in strip mining to. a) break up rocks overlaying coal seams.

  • CHAPTER 11 Mining Technology

    the mining technologies currently in use on Federal leases and the potential for commer-cial mining technologies to extract Federal coal reserves from deep underground seams. The chapter discusses: three surface mining techniques that are used in the West: 1) area strip, 2) open pit, and 3) terrace pit; two methods of underground mining in

  • US4589700A Strip-auger method of mining thin seams of

    The present invention relates to a combination of open cast strip mining and auger mining of thin seams of hydrocarbonaceous deposits. In this mining method, a first working pit is stripped to expose the deposit, the hydrocarbonaceous material extracted and the exposed deposit seam face of at least one highwall is auger mined. A second and successive working pits are opened parallel to but

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