Li et al [22] investigated the effects of illuminance and external moisture on grayscale and texture features of coal and gangue images which provided an essential guide for the image based
Coal extraction in China is increasingly moving towards colder regions such as Xinjiang and Inner Mongolia However these mines face land restoration challenges due to a scarcity of fertile topsoil This study explores the potential of coal gangue a mining byproduct as a viable substitute for topsoil The study examines the effects of humidity fluctuations and
Among the techniques for converting stacked coal gangue to reusable material one of the most effective ways is to use coal gangue as a coarse aggregate in green concrete productions
The recycling of coal gangue appears to be a promising avenue to reduce the amount of coal gangue and resource consumption The application potential of coal gangue in building materials industry energy industry agriculture chemical industry have been realized However most notably coal gangue products are less competitive in the
Coal gangue is one of China s main industrial solid wastes which contains various harmful heavy metal elements such as lead Pb The long term accumulation of coal gangue causes Pb to migrate to the surrounding environment due to weathering and rain erosion eventually endangering human life and health with its continuous accumulation in the food
Coal gangue is a by product generated from coal mining and washing Using coal gangue as aggregate is an effective approach of valorization this high volume industrial waste not only solving the environmental issue of accumulation but also
[3 9 11 24 25] Such an utilisation of coal gangue results in a direct saving of equivalent carbon footprint compared to the use of natural material Incidentally coal gangue has beneficial geotechnical properties in terms of favourable compaction and shear strength properties Hence in the current study the coal gangue from a
Coal gangue is a kind of industrial solid waste with serious ecological and environmental implications Producing concrete with coal gangue aggregate is one of the green sustainable development requirements This paper reviews the properties and preparation methods of Chinese gangue aggregate studies the influence of gangue aggregate on concrete
Co spontaneous combustion of coal and gangue Thermal 1 Introduction As a significant energy source in the world coal accounting for more than 27% of the primary energy structure [1] [2] and is widely employed in daily production and is a low carbon solid waste produced during coal mining and washing accounting for about 10%−15% of the total coal
The storage and accumulation of coal waste have adverse effects including the utilization of valuable land resources air pollution and the potential for groundwater contamination
With coal gangue and high alumina refractory solid wastes as raw materials needle‐like mullite powder with an average diameter of about 1 μm was synthesized at 1300 °C by using the
The effects of coal gangue and fly ash on the hydraulic properties and water content distribution in reconstructed soil profiles of coal mined land with a high groundwater table Hydrol Process
In this study the research aim is to enhance the activity index of activated coal gangue and study its activation mechanism The activation process of coal gangue was optimized through orthogonal tests and the Back Propagation BP neural network model was improved using a genetic algorithm With the effects of grinding duration calcination temperature and
They can crush low to medium hardness materials such as limestone and coal as well as materials with moisture content below 15% suitable for both dry and wet crushing Hammer crushers have a reduction ratio of up to 50 a feed size of up to 1 000 mm and a maximum output capacity of 3 000 t/h
Coal gangue is not recommended for producing high grade concretes Nevertheless pore structure can be improved by adding mineral admixtures fibers and admixtures to the coal gangue concrete
Using coal gangue CG as supplementary cementitious materials SCMs is believed to be one of the effective strategies for CG disposal While the low reactivity of CG restricts its large scale
This study utilized X ray computed tomography CT technology to analyze the meso structure of concrete at different replacement rates using a coal gangue coarse aggregate after experiencing various freeze thaw cycles F Ts A predictive model for the degradation of the elastic modulus of Coal Gangue coarse aggregate Concrete CGC based on mesoscopic
China is the world s largest coal mining country coal reserves account for about 90% of China s mineral resources Hailiang 2021 According to the National Bureau of Statistics of the People s Republic of China data China produced billion tons of coal in 2020 accounting for about % of global coal production Yutao 2022 According to the 2020 annual report on
Using longwall top coal caving LTCC in an extra thick seam many problems appear such as large broken top coal blocks frequent arch formation in the drawing process poor balance of drawing top coal and low top coal recovery which seriously affect safe efficient and green mining In this study the size distribution of top coal blocks was measured in LTCC
In this study NaA zeolite was successfully synthesized from coal gangue with high contents of iron and quartz as the main raw material The results show that most iron ions can be removed from
This study utilized X ray computed tomography CT technology to analyze the meso structure of concrete at different replacement rates using a coal gangue coarse aggregate after experiencing various freeze thaw cycles F Ts A predictive model for the degradation of the elastic modulus of Coal Gangue coarse aggregate Concrete CGC based on mesoscopic
The ratio between combustible organic matter and inorganic impurities of coal is also one of the variables in coal classification Coal gangue is a significant residue of coal mining and cleaning which accounts for approximately 10 15% of raw coal [3] The first group of impurities in coal which are also the most commonly encountered are quartz SiO 2 and clay
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