what is gangue and surrounding rock
Ore vs. Gangue — What's the Difference?
In mining, gangue is the commercially worthless material that surrounds, or is closely mixed with, a wanted mineral in an ore deposit. It is thus distinct from overburden, which is the waste rock or materials overlying an ore or mineral body that are displaced during mining without being processed, and from tailings, which is rock already stripped …
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Research on Surrounding Rock Control Technology of Gob …
With the development of coal resource mining at depth, rock burst and other disasters faced by deep mining are more and more common. However, deep mining still needs to face the complex geological environment of high stress. This study first analyses the structural characteristics and mechanical model of gob-side entry retaining and puts …
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CHAPTER 9: ORE DEPOSIT GEOLOGY
Ore deposits contains ore minerals mixed with other 'non-valuable' minerals called gangue minerals from which ore will be separated separated through ore processing. Ore …
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Parameters and surrounding rock control of gob-side …
From the perspective of the surrounding rock structure, the smaller the cutting angle, the less sufficient the collapse of the key rock stratums in the mined area, resulting in an increase in the ...
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Mechanism and surrounding rock control of gob-side …
that the degree of nal deformation of surrounding rock of the formed entry was like: at the fault> before the fault> after the fault. By applying the proposed support technology, the deformation of the surrounding rock in the fault-aected area was eectively controlled so that the formed roadway appeared thereafter can be reused.
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Assessment of heavy metal in coal gangue: distribution, …
In the process of excavation and utilization of the coal gangue hill, gangue at different weathering degree was exposed to the environment, which can be harmful to the surroundings. In order to find the law of heavy metal release and to evaluate the potential ecological risk, five kinds of coal gangue at different weathering degrees were collected …
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Ore Body, Shapes and Occurrence of | SpringerLink
The useless rocks inside the ore body are called barren rocks or gangue. Shape. Based on the proportions of the extension length of the ore body in three …
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What is Gangue in Chemistry Definition
Gangue is generally an unwanted material or impurity that is present in an ore. This can be found in ore deposits where the mineral is present. During the process of extraction, these impurities are mixed up with ore in the form of stone, sand, rock, etc. The gangue must be separated from the mineral with the help of ore dressing or mineral ...
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Identification of Coal, Gangue, and Surrounding Rock Based …
This study proposes a method for identifying coal, gangue, and surrounding rock using laser-induced breakdown spectroscopy (LIBS) and deep learning. The method initially …
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Rock Salt: A sedimentary rock composed of the mineral …
Rock salt is the name of a sedimentary rock that consists almost entirely of halite, a mineral composed of sodium chloride, NaCl. It forms where large volumes of sea water or salty lake water evaporate from an arid-climate basin -- where there is a replenishing flow of salt water and a restricted input of other water.
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4.3: Rocks
Metamorphism refers to changes in mineral composition or rock geometry that occur in solid rocks with increasing temperature and pressure. These changes produce a rock called metamorphic rock. It is important to remember that changes producing metamorphic rocks take place while the rock is solid. Any part of the rock that is melted …
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Gangue
Gangue refers to substances that are extracted along with desired minerals or ores due to their close association, and are considered commercially worthless in mining.
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Stability analysis and control countermeasures of surrounding rock …
Concurrently, as the main roof's fractured rock block rotates and subsides, the surrounding rock of the GEFR enters a stage of intense dynamic pressure that results in significant deformation of the surrounding rock, as the immediate roof of the GEFR comes into contact with the gangue and becomes progressively compacted.
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Research and engineering practice on space characteristics of gangue
where ω t represents the subsidence amount of the key layer during the fracture stage as a function of time, M is the thickness of the coal seam, Σh i is the distance from the rock layer to the ...
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Deformation and Failure Mechanism of Surrounding Rock in Deep Soft Rock
The long-term stability control of surrounding rock of deep high-stress soft rock tunnel has always been the research hotspot and difficulty of underground engineering. With the continuous increase of the number of ultra-kilometer mines, reasonable support design has an important impact on the efficient and safe production and sustainable development of …
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Gangue
The removal of the gangue from the ore is called ore dressing, or concentration of the ore. It may then be dumped as tailings. Mining companies take into consideration the costs that they will incur for separating the economic fraction from useless gangue, and only then decide if a mining operation will be economically viable.
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Skarn | Types, Composition, Formation, Uses
Skarn deposits have typical skarn Gangue minerals but also contain ore minerals in abundance which are of economic importance. Skarn deposits are therefore classified by their dominant economic element, such as copper (Cu) skarn deposit, or molybdenum (Mo) skarn deposit to name a few. ... An antiskarn is a calc-silicate rock …
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Coal Gangue: Composition, Processing, Use And …
Coal: One of the main components of coal gangue is coal itself, including different types of coal, such as stone coal, lignite, anthracite, etc. Rock: Coal gangue usually contains a large amount of rock.These …
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Research on Intelligent Coupling Control Technology …
In the formula, γ—average bulk density of overlying rock, kN/m 2; H—buried depth of coal rock mass, m. For the working face with a small inclination angle of the coal seam, the surrounding rock pressure P 0 of the stope does not change much in the direction of the working face. For a fully mechanized caving face with a relatively large …
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Gangue | geology | Britannica
vein, in geology, ore body that is disseminated within definite boundaries in unwanted rock or minerals (gangue). The term, as used by geologists, is nearly synonymous with the …
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Mineral processing | Metallurgy, Crushing & Grinding
mineral processing, art of treating crude ores and mineral products in order to separate the valuable minerals from the waste rock, or gangue. It is the first process that most …
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Representative coal gangue in China: Physical and chemical …
CG is a kind of shale solid waste associated with coal, which is generally presented as a black gray rock (Li et al., 2018a, Li et al., ... Under the long-term erosion of natural environment such as sunshine and rain, the HM elements in coal gangue will pollute the surrounding soil environment and air quality through leaching reaction, ...
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Comprehensive utilization and environmental risks of coal gangue: A
Coal gangue is a mixture of a variety of rock and mineral composition with low carbon content. Normally, its calorific value increases with the increase of carbon mass fraction and volatiles, in contrast, decreases with the increase of ash. ... The surrounding rock deformation and the plastic zone development of the chamber was analyzed by ...
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Comprehensive utilization and environmental risks of coal gangue…
The coal gangue is a kind of solid wastes from coal mining and separating,which is also a kind of grey-black rock harder than coal,characterized by low content of carbon and association with ... Investigation into trace element partitioning behavior from a coal gangue-fired power plant in Shanxi province, China, has been …
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What is gangue?
The natural substances in which metals or their compounds occur either in native sate or combined state are called minerals. The minerals aren't pure and contain different types of other impurities. The impurities which are combined with minerals are referred as gangue or matrix. Example: The rock surrounding a deposit of Gold (Au) is called ...
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What is gangue?
If both ore and gangue contain sulphur then ___ is used to separate ore from gangue in the froth flotation process. View Solution. Q3. The impurities present in a crude ore is called gangue. View Solution. Q4 What is gangue?
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Excess sulfur and Fe elements drive changes in soil and
Here, we opted to study the coal gangue piles and the surrounding control areas in Huaxi district, Guizhou province, a region with relatively consistent conditions, by measuring and investigating ...
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Study on the Mechanism of Surrounding Rock …
Sustainable development in coal mining requires a continuous and efficient method of coal extraction. Research shows that gob-side entries retained through roof cutting retained gob-side (RCGE) …
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Research on the Stability Mechanism of the …
balance arch, the bulking gangue in goaf, articulated transfer rock beam, and solid coal seam forms the main balance arch. The two together are called double balance arch. ... surrounding rock from the perspective of a large-scale and full cycle. Although many achievements have been made by basic theoretical research and field
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Coal Gangue: Composition, Processing, Use And …
Coal gangue is a fixed coal mining, washing, and processing product. It is a black-gray rock with lower carbon content and harder than coal associated with coal seams during the coal formation …
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