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As each long strip is excavated, the overburden is placed in the excavation produced by the previous strip. Recently Highwall miners have penetrated more than feet into the coal seam, and today's models are capable of going farther, with the support of gyro navigation and not limited anymore by the amount of cable stored on the machine. Retrieved from " https. Retrieved September 5, Although MTR sites are required to be reclaimed after mining is complete, reclamation has traditionally focused on stabilizing rock and controlling erosion, but not always on reforesting the area.

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This article needs additional citations for verification. The machinery is mounted on a base platform with tracks or wheels. Retrieved August 20, Wikimedia Commons has media related to Surface mining. Retrieved 28 June Please help improve this article by adding citations to reliable sources. Mapping of the outcrop as well as core hole data and samples taken during the bench making process are taken into account to best project the panels that the Highwall miner will cut.

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Mountaintop removal mining. As the coal recovery cycle continues, the cutterhead is progressively launched into the coal seam for For example, valley fills frequently bury headwater streams causing permanent loss of ecosystems. Retrieved 28 June United Mountain Defense. Shovels normally consist of a revolving deck with a power plant, driving and controlling mechanisms, usually a counterweight, and a front attachment, such as a crane "boom" which supports a handle "dipper" or "dipper stick" with a digger " bucket " at the end. This method commonly leaves behind terraces in mountainsides.

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Description: Other uses of the power shovel are 1- Suitable for close range of work. Pushbeams with Visual Product Development and Flow Simulation Behaviour software "Discrete Element Modeling" DEM shows smart-drive extended penetrations are possible, evenso under steep inclined angles from horizontal to more than 30 degree downhole. This page was last edited on 15 February , at Fire-setting Gold panning Hushing. Retrieved September 5, Reclamation for non-coal mines is regulated by state and local laws, which may vary widely. The profound changes in topography and disturbance of pre-existing ecosystems have made mountaintop removal highly controversial. The digging phase consists of crowding the dipper into the bank, hoisting the dipper to fill it, then retracting the full dipper from the bank. In gravel-filled river valleys with shallow water tables, a floating dredge could work its way through the loose sediment in a pond of its own making.
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