Crushed gangue can be used as a backfilling material for underground mining goaf backfilling in order to control strata movement and mining subsidence. ... the charge amount on the deformation behaviour of crushed gangue will be further investigated in future work with the purpose of providing the theoretical basis for underground crushed ...
Crushed gangue, an inhomogeneous and discontinuous medium, is accompanied with the absorption and dissipation of energy under compression.
dination structure of crushed gangue materials is inuenced and the occlusive eect, intercalation and stress concentra-tion of gangue blocks are signicantly changed during the loading and compression. Furthermore, the overall engineer - ing mechanical properties of crushed gangue materials are affected. At present, scholars at home and abroad ...
In the present work, the impact crushing tests were conducted to obtain the effects of sizes, gangue mixture ratios, and crushing velocities on the fractal characteristics of the crushed PSD characteristics, using an in-house designed device.
Innovations in pavement technology lead to the incorporation of coal gangue (especially high content of kaolinite and illite) into asphalt mixtures, making it a good roadbed material. The coal gangue is crushed and …
The crushed gangue materials which are filled into the goaf in solid-backfilling coal mining become the main body of bearing the overburden after the tamping process. Its resistance to deformation is the key to control …
The crushed coal gangue particles are widely used in solid backfilling. However, the non-uniform compaction and internal re-crushing behavior of crushed coal gangue under bearing-stress have not ...
For this purpose, a total of 30 concrete mixtures were designed by the inclusion of 0%, 25%, 50%, 75% and coal gangue as coarse aggregates and 0%, 10% and 20% metakaolin as binder at 0.55 and ...
After the copper ore is crushed, liquid is added to make it a slurry. The slurry is a mix of valuable copper ore minerals and "worthless" rock, called gangue (pronounced "gang"). The slurry is placed in a tank and a process …
The main purpose is to stabilize the overlying strata and reduce surface subsidence in the process of recovering coal reserves that are located under buildings, railways, and water bodies, thus reducing piled gangue on the surface and the environmental pollution. ... whose lithology is sandstone. The gangue was first crushed by a crusher and ...
An equation for predicting stress-strain relationship during compression-induced deformation of gangue backfill materials under multi-factor coupling effects was established and shows that this equation can predict compression- induced deformation in goaf, beneficial to providing a basis for predicting strata movement and surface subsidence and guidance for …
After the copper ore is crushed, liquid is added to make it a slurry. The slurry is a mix of valuable copper ore minerals and "worthless" rock, called gangue (pronounced "gang"). The slurry is placed in a tank and a process called froth floatation is used to separate the copper minerals from the gangue. Chemical reagents called ...
purposes (Clarence H. Lorig, March 2017) (DRZYMALA, 2007). ... being crushed into intermediate size from its originally huge size. ... agglomeration surrounded by waste and gangue mineral ...
To study the long-term bearing characteristics of crushed gangue in goaf under water immersion conditions, the creep test of the crushed gangue in the water immersion state was performed by using ...
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 process. And its …
Coal mining causes serious ecological and environmental damage. The crushed gangue is backfilled into underground goaf, which not only inhibits mining-induced subsidence but also reduces accumulation of waste on the ground: however, the effects of backfilling with gangue backfill materials in goaf are affected by a combination of multiple factors. To predict …
DOI: 10.1155/2021/6675984 Corpus ID: 233708259; Effects of Water Immersion on the Long-Term Bearing Characteristics of Crushed Gangue in Goaf @article{Jiang2021EffectsOW, title={Effects of Water Immersion on the Long-Term Bearing Characteristics of Crushed Gangue in Goaf}, author={Ning Jiang and Dawei Yin and Junbiao Ma and Liu Han and Haiyang Pan …
In this research, the deformation, particle crushing, and morphology evolution of saturated crushed gangue under variable axial stresses (0, 2, 4, 8, 12, 16, and 20 MPa) were …
The crushed gangue will be displaced laterally in the process of being compacted, and the wall of the cylinder will be subjected to a certain amount of lateral pressure due to the presence of the ...
It is typically in powdered form after the ore is crushed. 2. Role of Flux : - A flux is a substance that is added to the gangue during the metallurgical process. ... Its primary purpose is to react with the gangue to help separate the desired metal from the impurities. 3. Formation of Fusible Material : - When flux is added to the gangue, it ...
To study the deformation characteristics of crushed gangue under different water content conditions, the confined compaction test of crushed gangue was carried out under five different water content conditions by using a universal material testing machine and a compaction device. The strain–stress relationship in the compaction process of crushed gangue and the …
Coal gangue piles accumulate outside mines and can persist for years, negatively impacting the regional environment. To determine the main cause of soil pollution at coal gangues, several coal ...
The crushed gangue continues to fill the surrounding small voids, resulting in a further increase in gangue density and a gradual reduction in the magnitude of gangue compression deformation. The ...
The gangues in mine goaf have two characteristics: (1) the particle size of the gangue increases from bottom to top, and it is not a single particle size distribution, but a …
Due to different backfilling purposes, slurry backfilling differs from paste backfilling. ... The gangue was crushed into gangue powder through multiple stages of crushing and screening. Before ...
The purpose of desliming is to dissociate and disperse the fine slime mixed in and attached to coarse ore grains and the agglomeration of fine slime, so as to remove the slime. ... magnetic dewatering tank is used to remove the fine gangue grains, which is important for improving the technical indicators of production of beneficiation plant ...
Effects of particle size of crushed gangue backfill materials on surface subsidence and its application under buildings Meng Li1 • Jixiong Zhang1 • Yanli Huang1 • Nan Zhou1 Received: 5 August 2016/Accepted: 18 August 2017/Published online: 30 August 2017 Springer-Verlag Germany 2017 Abstract In recent years, solid waste backfill ...
The crushed gangue materials which are filled into the goaf in solid-backfilling coal mining become the main body of bearing the overburden after the tamping process. Its resistance to deformation ...
In order to solve the problem of the high cost of coal-based solid waste bulk stacking and paste filling in the large-scale coal electrification base in East NingXia, in this study, fly ash is skillfully used to replace the broken coal gangue as the mixed filling material. As using a jaw crusher for crushing large coal gangue is expensive, and its energy consumption is …
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 ores undergo after mining in order to provide a more …
crushed gangue under di erent loading rates was designed, and the acoustic emission (AE) signal was monitored in the process of confined compression. The test results showed that with the increase
The crushed gangue, in its natural state, is in a state of intermittent gradation [7]. To ensure the filling effect of the mining area and to protect the safety of coal pro- duction, the compaction …
Coal gangue power generation Coal gangue grinding adopts fluidized bed technology. When the carbon content is greater than 20%, it can be used as energy and can be used to generate electricity. Recycling of coal and pyrite Coal gangue adopts composite dry coal preparation, cyclone, and heavy medium separation. When the coal content exceeds 20%, …