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A new generation of high-efficiency coarse and medium-fine crushers: CI5X series impact crushers
·The disposal and utilization of solid waste of coal gangue is one of the main problems in coal mining in China Injecting coal gangue into goaf in the form of slurry can effectively solve the
·To address the environmental issues and safety hazards caused by surface accumulation of gangue research on comprehensive utilization and backfilling mining of coal gangue has been conducted both
·To eliminate the prearranged pillars control the subsidence and collapse and promote the widespread use of coal auger mining method in thin or extremely thin coal seam Li and Yang [23] [24][25
·The persistent reliance on coal has resulted in the accumulation of substantial coal gangue a globally recognized problematic solid waste with environmental risks Given the coal gangue properties and global land degradation severity the resourceful utilization of coal gangue as soil conditioners is believed to be a universally applicable cost effective high
The ball mill is the key equipment for crushing materials after they have been crushed It is suitable for grinding ores and other materials and is widely used in non ferrous metal mining non metallic mining building materials the chemical industry electric power coal transportation cement silicate products new building materials refractory materials and glass ceramics etc
·In 2021 China s coal consumption accounted for about 56% of primary energy consumption and the proportion of coal consumption in China will still play a leading role for a considerable period
Whether the application technology of coal crusher is stable in coal mining will directly affect the economic benefits and profits of coal enterprises The crusher manufacture and development are closely related to power machineries such as electric motor and steam engine The coal mine crusher development with power machinery development The
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·Coal gangue produced during coal mining and processing [1 2] is one of the most extensively produced solid wastes in China [1 3] accounting for approximately 10%‒20% of raw coal production [] The accumulation of coal gangue causes serious environmental social and economic problems in the coal mining area [] Heavy metals and harmful organic substances in
·During mining processing and utilization of coal the environment is exposed to piles of coal coal gangue and coal ash which have human health concerns Coal and coal gangue samples were obtained from a coal mining company located in Southern Province Sinazongwe District Zambia The main objective of this research was to determine the level of
·Focusing on the issues of complex models high computational cost and low identification speed of existing coal gangue image identification object detection algorithms an optimized YOLOv5s lightweight detection model for coal gangue is proposed Using ShuffleNetV2 as the backbone network a convolution pooling module is used at the input end instead of the
·Water availability seriously affects vegetation restoration in arid mining areas and mulching is an effective way to improve soil water conditions Coal gangue occupies large swathes of land
·With the extraction of mineral resources a significant volume of solid waste including tailings TS and coal gangue CG has been generated resulting in severe environmental pollution and safety hazards [1] [2] [3] [4] The comprehensive utilization of solid waste has perennially been a focal point within the field of mining engineering [5]
·PDF China s total coal production in 2021 exceeded billion tons 52% of the world s total Coal gangue a solid waste of coal mining accounts Find read and cite all the
·To solve the problem of gangue discharge in coal mining fluidized gangue filling technology was developed The key scientific problem of this technology is the diffusion characteristics of the
·Global rise in greenhouse gas emissions GHG is triggered mainly due to the consumption of fossil fuels for power generation and domestic usage Among the fossil fuels coal is a primary contributor to global GHG with substantial emissions generated during its mining and combustion process Coal gangue a residue produced during the coal mining process has
·Coal is not only the most abundant fossil fuel on earth but also an indispensable energy source in the industrial age According to the data of 2021 National Mineral Resources Reserve Statistics Table the cities with the most coal reserves in China s energy minerals are Inner Mongolia Xinjiang Shanxi Hebei Chongqing Gansu Shaanxi and other regions
·Underground backfilling stands out as a crucial technological strategy for the eco friendly and effective management of solid waste in mining operations
·Henan Centbro Machinery STM Equipment Co Ltd specializes in the production and sale of mining machinery and equipment crusher series large ball mills coal mills and other equipment Hign tech Development Zone Zhengzhou City Henan China 86 18239958323 kevin Toggle navigation HOME;
·Among coal mining related wastes coal gangue CG is the heterogeneous waste generated during the mineral processing or coal washing phase of coal mining A thorough understanding of environmental concerns associated with the current model of CG utilization and potential future application is gaining paramount importance Though previous
·Wang Zengcai and others proposed γ Detection of coal gangue mixing rate in top coal caving mining by radiographic method 11 14 17 18 Li Liansheng and others proposed a method for identifying
·In China the reclamation of coal mining subsidence land began in the late 1970s At present coal gangue filling reclamation is an important means for mining land reclamation Li et al 2020 Coal gangues are backfilled and covered with soil in subsidence areas to reconstruct mining disturbed soil which serves the dual effect of mineral processing waste disposal and
·With the continual advancement of coal resource development the comprehensive utilization of coal gangue as a by product encounters certain constraints A substantial amount of untreated coal gangue is openly stored particularly acidic gangue exposed to rainfall The leaching effect of acidic solutions containing heavy metal ions and other
