Study on the macro micro evolution of compaction Nature
Currently the main method of mine solid waste disposal and utilization is to apply gangue to underground filling For the grading characteristics of coal gangue in the hollow zone in underground
Currently the main method of mine solid waste disposal and utilization is to apply gangue to underground filling For the grading characteristics of coal gangue in the hollow zone in underground
The aggregate is composed of coal gangue sourced from Daizhuang Coal Mine Shandong China Coal gangue is typically employed as a filling aggregate in coal mines with a maximum particle size of 25 mm 1 in frequently requiring preliminary crushing and screening via jaw crusher [14] The CPB for coal mines belongs to the category of "lean
In Tangshan Mine there are four engineering problems including the layout of multiple seam mining system serious environmental damages caused by gangue accumulation and surface collapse nearly 100 million tons of three under coal coal trapped under buildings water bodies and railways to be released and the control accuracy of stratum formations to
soil amendments from coal gangue and their effects and provide a brief analysis of the challenges and issues faced in the soilification process It is intended to serve as a reference for further research and engineering applications 1 Introduction Coal gangue an inevitable byproduct of coal mining generates enormous quantities worldwide
Introduction Coal gangue is a complex industrial solid waste generated from the coal mining and washing process [1 2] which includes the discharged gangue during the tunneling course of rock and coal drifts hand selecting gangue and washing gangue
The backfilling mining method that fills gobs with coal gangue can prevent water inrush hazards protect groundwater resources and protect the ecological environment of the mining area However initial conditions including the particle size distribution of gangue and the stress environment may affect the seepage characteristics of gangue backfill and inrush
To address the lightweight and real time issues of coal sorting detection an intelligent detection method for coal and gangue Our v8 was proposed based on improved YOLOv8 Images of coal and gangue with different densities under two diverse lighting environments were collected Then the Laplacian image enhancement algorithm was proposed
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
Coal gangue a type of solid waste is mainly accumulated in the mine areas negatively causing environmental pollution land occupation and even structural disasters [1] [2] [3] To address this issue the most attractive and effective solution to utilize coal gangue is believed to serve as fine and coarse aggregate in producing green concrete in situ which is
Effects of long term coal gangue dumping on soil chemical environment and microbial community in an abandoned mine Land Degradation & Development IF Pub Date 2024 08 23 DOI /
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]
In coal mining the automatic removal of coal gangue is an important link in modern coal production and processing The majority of coal mining and production in China has been screened and large gangue sizes have been screened manually Zou et al Citation 2020 Manual gangue selection is a backward method with excessive labor intensity and
Possibility of cemented gangue backfill was studied with gangue of Suncun Coal Mine Xinwen Coal Group Shandong and fly ash of nearby thermal power plant in order to treat enormous coal gangue on a large scale and to recovery safety coal pillars The results indicate that coal gangue is not an ideal aggregate for pipeline gravity flow backfill but such
Coal gangue CG is a rock associated with coal during the formation process which is discharged during the coal mining and separating and the output accounts for 15 20% of original coal
Coal gangue is the solid waste that is discharged during coal mining and tunneling or after the preparation of raw coal Coal gangue which is primarily composed of low metamorphic coals clay minerals quartz and feldspar has become China s largest industrial solid waste [[1] [2] [3]] According to statistics the amount of coal gangue in China has topped
Coal gangue CG is an associated product in the process of coal mining and washing accounting for approximately 10 15% of the raw coal production and in some small and medium sized coal mines
Underground backfilling stands out as a crucial technological strategy for the eco friendly and effective management of solid waste in mining operations However existing backfilling techniques have led to increased production processes at the working face resulting in a reduction in coal extraction efficiency Addressing the temporal and spatial interference
Coal gangue characterized by high ash content and low heating value is an undesired but inevitable by product of coal mining [[1] [2] [3]] Based on the fuel flexibility advantage of circulating fluidized bed combustion CFBC technology and increasing demand for electricity coal gangue is widely used in CFBC power plants for power generation in some
Among them 16 gangue and 18 coal samples were collected from the Shenfu Dongsheng mine 18 gangue and 27 coal samples from the Yanzhou mine and 16 gangue and 5 coal samples from the Pingshuo mine We utilize an Ocean Insight brand MX2500 spectrometer to collect laser induced breakdown spectral data of the samples which has a spectral range
