reprocessing of tailings and placement within the open cut final void upon cessation of processing, removal of the Tailings Storage Facility (TSF) and rehabilitation of the former facility area; a revised open cut final void closure strategy; and an acknowledgement of the need and plan for ongoing monitoring and management in the long term to ensure the protection of the environment around the ...
Overburden Removal Increases Permeability • Permeability increases exponentially with decreasing effective stress • Effective stress is diminished as overburden is removed during mining • Permeable pathways occurring in geologic structures such as breached folds or faults are enhanced as overburden .
Selective placement of coal stripmine overburden in Montana. III. Spoil mixing phenomena. Open file report (interim) Jul 77Jun 78
The overburden is dumped according to its chemical characteristics, mainly acid potential, to ensure optimal rehabilitation outcomes. Production Phase. The mining process begins with clearing of vegetation, topsoil removal and stockpiling, followed by laterite removal and stockpiling. Vegetation removal involves harvesting of any commercial forest products by the Department of Conservation .
cheapest means of overburden removal. Such machines are made by a no. of manufacturers in many sizes and capacities enabling correct matching between the planned requirements and the equipment selected. This machine is also capable of digging below the working level. Below Fig shows the view of such machines Draglines are made up of attic construction by structural steel which is lowered down ...
· • Highway construction continues, including removal of unsuitable material, placement of geotextile fabric and placement of aggregates hauled from Gates Island and borrow sources within the work site. Overburden removal and gravel extraction at Gates Island will continue to support embankment construction. • The construction of bridge foundations will continue, including .
Final placement of overburden will consist of dragline placed spoils as part of the normal overburden removal process. Prestripped or other trucktransported overburden will be placed into valleys between and in some cases over the top of spoil peaks to achieve the designed postmining surface contours shown on all PMT plates. Overburden removed via truck and shovel methods (, during box ...
Many translated example sentences containing "overburden placement" – FrenchEnglish dictionary and search engine for French translations.
OVERBURDEN CONSTRUCTIONmeans the removal of overburden (waste or spoil) materials and the preparation of a mining area or construction site including: reclamation, stockpiling of reclamation material, erosion protection; Construction and maintenance of roads excluding paving and surfacing), drainage ditches; Construction of mine infrastructures; Excavation for installation and recovery of ...
Overburden mined from the Project will be placed directly as backfill, stored on temporary OSAs for use as backfill later, or stored in a permanent OSA. Most of the overburden mined will be transported directly from the active phase of mining to backfill the historical MCM open pits or into previously mined portions of H1 and NDR. Mining Sequence Itafos has considered several approaches to ...
Mountaintop removal fits none of these criteria. The assertion that the placement of mining waste into the nation's waters has minimal adverse effects is simply not credible. The permit in dispute in the Kentuckians case alone allowed Martin Coal to place its overburden in 27 valleys and to fill in miles of streams. According to the federal ...
This subsoil layer is referred to as the overburden. Stockpiles are often meters deep. When mining operations are complete, the overburden material is reapplied and leveled and then the topsoil is reapplied and spread over the overburden material to provide a planting medium (USDA Forest Service RM447). Both removal and replacement of the soil layers involves the use of heavy equipment ...
Overburden removal can be performed with a single dragline or a tandem dragline system. When a single dragline is utilized, the dragline takes periodic sojourns across on the spoil pile, getting there either on a section of extended bench or bridge, or around the end of the pit. When a tandem system is used, one machine operates on the highwall side, while the other strips the rehandle ...
It is possible to remove the first few feet of the productive layer if it is misidentifying as overburden. On the other end, mixing in lowgrade overburden into the productive oil sands also increases production costs and eats into the profits. The more accurately the start of the oil sand is identified, the higher the profit to cost ratio will be for the mine.
overburden removal and the associated foundation rock excavation; curtain grouting from within the galleries in the dam; road construction, which may be able be performed in winter, depending on the geotechnical conditions in the corridor and moisture and density controls; and, all activities within the powerhouse, after weather proofing of the powerhouse structure. There are also activities ...
Download Citation | Collapse of cohesive overburden following removal of support | Model tests have been performed in a large centrifuge to investigate the conditions for critical stability of a ...
2. the method of mining, handling, and placement of overburden in the backfill; 3. the degree of compaction during backfill construction; 4. the length of time that acid‐producing materials are exposed; 5. the hydrology of the backfill. All of these factors are involved in AMD formation and prediction. The hydrology of a backfill and its effect on AMD generation is highly complex, and past ...
The mechanical removal option of the overburden will be undertaken during the winter months. The ODF capacity will be approximately 15 Mm3. The ODF will be capable of retaining a total of Mt (~ Mm3) of overburden that will be discharged into the facility during an 8 months dredging period, scheduled to run from April to November "2011" (Year 3). A further Mm3 of swelled peat ...
openpit mining Mining. a method of mining in which the surface excavation is open for the duration of mining activity, employed to remove ores and minerals near the surface by first removing the waste or overburden and then breaking and loading the ore. Used to mine thick, steeply inclined coalbeds and also used extensively in hardrock mining for metal ores, copper, gold, iron, aluminum, and ...
Many translated example sentences containing "overburden removal" – GermanEnglish dictionary and search engine for German translations.
The present invention pertains to a method for removing overburden in a surface mining operation using blast casting and blast fragmentation of the overburden together with mechanical excavation to reduce the overall excavating effort in exposing a coal or other mineral seam of substantial width. 2. Background . The time and effort required to move overburden material away from a mineral seam ...
overburden removal and one machine works behind another [1]. As the system is a multilift operation and can be applied to single and multiple seam situations, the first and therefore uppermost unit removes the top overburden lift, and so forth. A major advantage of tandem machines is stated to be that each machine is assigned a specific task. In the case of multiple seams or thick overburden ...