In North America, most waste rock pile research is currently being performed by several different Canadian government and industry- sponsored groups. These groups include: the British …
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Coal mine waste rock (CMWR) generated in coal mining activities is one of the most significant sources of industrial solid waste. Nearly 4.5 billion tons of CMWR stockpiled in more than 1700 …
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Constructing and designing waste rock piles and/or dumps involves four major activities: Material Characterization: Constant and accurate characterization of the mine and waste rock can help identify rock with high acid generation potential and acid-buffering potential. With this knowledge, the rock can be placed in the pile in such a way as to ...
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Waste rock, foreground, from Diavik Diamond Mine open pits. Top right is the mine's processed kimberlite containment area. To study waste rock, the mine built the world's largest waste rock test pile. For a feature from the mine's …
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For instance, mine waste piles can contain chemicals like arsenic that can leach into waterways. Adits and mine shafts can be unstable, and potentially harm hikers or others. ... Science: plant growth in hard rock mining waste. Science: plant growth in hard rock mining waste. Our data in a decision support tool: hazard assessment and ...
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Waste rock piles (WRPs) are commonly remediated with cover systems to limit water and oxygen influx and mitigate the impacts of acid mine drainage (AMD) on the environment. While numerous types of cover systems exist, simple, single-layer soil covers remain an attractive option due to their low cost and simplicity of installation. Since knowledge of their long-term performance in …
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main waste rock pile performs. "Our test waste rock piles research project is a collaboration of Diavik, three Canadian universities, industry, and science agencies," said Diavik Senior Specialist, Mineral Waste, Lianna Smith. Ours is one of only a handful of …
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Waste-rock heterogeneity is attributed to the physical, chemical, lithological, and mineralogical characteristics of waste rock, variations in the topography of the waste-rock pile and its foundation, and waste-rock pile …
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Waste rocks with no economic value are extracted to access the ore in a mine and are usually stored in surface piles. These WRPs can exceed 300 m in height and contain up to several hundred million cubic meters of waste rocks (Aubertin et al., 2002; McCarter, 1990; McLemore et al., 2009; Morin, 1990).Reactive minerals in the waste rocks may oxidize and …
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Improved design to reduce contaminant mass loadings from waste rock piles is an increasingly important consideration. In certain cases, an engineered cover system containing a flow control layer (FCL) may be used to mitigate the release of metals out of a pile using capillary barrier effects (CBEs), diverting water away from reactive materials below. In this study, a …
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AMD is routinely derived from waste rock, tailings, pit wallrock, underground mine voids, heap leach pads, ore stockpiles, concentrate stockpiles and even slag piles. In many jurisdictions, there is an assumption that tailings materials represent the highest AMD risk.
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The majority of the rock extracted in an open pit operation does not contain an economic mineral resource and is placed in waste rock stockpiles (Figure 5). These piles commonly have a large footprint and can be tens to hundreds of meters in height. Waste rock piles at large, open-pit operations may contain up to several billion tons of material.
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Mine waste rock piles configurations tend to take advantage of the topography in which they are situated. Common classification for such configurations has been described by Hawley and Cunning (2017), as follows: valley-fill, cross-valley, side-hill, ridge, or heaped. Within a particular topography the method of deposition and
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To overcome the segregation effect observed in phosphate mine waste rock piles, Amrani et al. (2019) collected samples with equal weight at the base, the middle, and the top of the pile. Furthermore, heterogeneity was considered by Munroe et al. (1999), where samples were collected on the slope of the waste rock piles. The pile was divided into ...
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Mine drainage limits Topsoil piles Haul roads not on active mining area Land application area 1 Crusher area 1 Spent ore piles 1, surge piles, ore stockpiles, waste rock/overburden piles Pumped and unpumped drainage and mine water from pits/underground mines Seeps/French drains 1 On-site haul roads, if constructed of waste rock or spent
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Waste Rock. The majority of the rock extracted in an open pit operation does not contain an economic mineral resource and is placed in waste rock stockpiles (Figure 5). These piles commonly have a large footprint and can be tens to …
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Mine waste rock and overburden dumps are massive structures, for example, mountain top coal mines in British Columbia are constructing the largest man-made structures on the face of the earth. These immense waste dumps are often up to 400 meters high, designed to contain in excess of 1 billion ...
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Our analysis of the hydrogeological properties of waste rock piles is based on a synthesis of data from four mine sites; Myra Falls, B.C., Island Copper, B.C., Elkview Mine, …
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The Ore Treatment Unit was a uranium mining company that is currently being decommissioned. The local rainfall index makes it necessary to release effluents into the environment. After releasing, the wastewater is available for unrestricted use. Current study aims to use national and international recommendations to assess the radiological potability of …
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Waste rock stockpiles. From a hydrogeological perspective, waste rock stockpiles are more complex structures than tailings deposits. The macro-scale properties of a stockpile depend upon: (i) the relative fractions of finer material and …
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Parent geology, mining operation, construction practice and weathering processes govern the hydrogeological behaviour of waste rock piles. Variable heterogeneity in such earth structures requires site specific correlations. Based on field investigation and laboratory characterization, this paper developed a physical model for the unsaturated East Pile at the …
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Mine waste rock piles (MWRPs) are anthropogenically created landforms in present and past mining areas that are derived from open pit and underground mining methods. Surficial oxidation of sulfide minerals of MWRPs is a major cause of acid drainage and can increase concentrations of toxic metals downgradient from them. MWRPs exhibit a diverse ...
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Water quality in the unsaturated and saturated zones of a waste rock pile containing sulphides was investigated. The main objectives of the project were (1) the evaluation of geochemical trends including the acid mine drainage (AMD)-buffering mechanism and the role of secondary minerals, and (2) the investigation of the use of stable isotopes for the interpretation …
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Mine waste rock and tailings are typically the two major waste types at mine sites, regardless of the mineral commodity (e.g., coal or base/precious metals), deposit t ype or extraction method
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Water quality in the unsaturated and saturated zones of a waste rock pile containing sulphides was investigated. The main objectives of the project were (1) the evaluation of geochemical trends including the acid mine drainage (AMD)-buffering mechanism and the role of secondary minerals, and (2) the investigation of the use of stable isotopes for the interpretation of physical and …
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Mining activities are known for the profound changes they cause in the environment, especially those related to environmental liabilities generated by these enterprises. One major concern of this sector relies on the acid mine drainage (AMD) process, which is formed by the exposure of sulfide minerals to oxidizing conditions. As a result, the production of low …
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The numerical simulations of waste rock piles described in this paper were carried with TOUGH AMD developed by Lefebvre, 1994, Lefebvre, 1995. This simulator was developed in the context of a detailed study of a waste rock pile at the Doyon mine (Gélinas et al., 1994). Only the main features of the simulator are summarized here.
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After it is amended with organic material, it is used to test the optimal grade for reclaiming the mine's waste rock piles and to test the pros and cons of different depths of ground cover and aptitude for reseeding. Nathan Burton ... Workers using a variety of heavy equipment to regrade the Capulin waste rock pile in order to reduce erosion ...
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Mining activities, particularly open pit mining, can generate large volumes of waste rock that are generally stored in large unsaturated piles on the land surface at the mine site.
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Large amounts of waste rock are produced during mining operations and often disposed of in large piles. Particle size segregation usually occurs during waste rock disposal, which can lead to high ...
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