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The deformation characteristics of broken gangue under the bearing compression play a decisive role in the firmness, stability and safety of these structures (buildings), and the …
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Gangue, produced from coal mining and washing process, is a serious threat to the ground environment. Gangue backfilling mining method can solve this problem and reduce mining-induced hazards, e.g., controlling surface subsidence and preventing water inrush from seeping into goaf by cracks in overlying strata. In this paper, effects of the original particle size …
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In summary, the crushed gangue significantly accelerates the propagation velocity of methane-air explosion flames. The propagation velocity at the end of the blocked area increases with the α. ... the blockage length and gas concentration both play an important role in determining the extent of damage. There is little difference of ...
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Keywords: crushed gangue; confined compaction; deformation law; particle crushing; relative crushing rate 1. Introduction Coal gangue is the solid waste generated during the mining and washing of ...
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effect of crushed gangue overlying rock, this article focuses on the regulating effect of gangue particle size grading on mechanical properties. Through research on the physical properties of gangue and ... playing a key bearing role in the spatial structure of the goaf[9–11]. Some scholars have theoretically
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Li et al. (2017) monitored the stress-strain relationship of crushed gangue and concluded that quite a portion of crushing energy is released during the compaction process. ... This study aims to investigate the role of gangue on the mitigation of mining-induced hazards and environmental pollution by GBM method. To carry out the research ...
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In order to optimize the control effect of crushed gangue overlying rock, this article focuses on the regulating effect of gangue particle size grading on mechanical properties.
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The strain–stress relationship in the compaction process of crushed gangue and the crushing law of gangue particles were obtained through the test, and the effects of the axial stress, water ...
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Search worldwide, life-sciences literature Search. Advanced Search Coronavirus articles and preprints Search examples: "breast cancer" Smith J
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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. ... The role of the lateral stress is to create a compact ...
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Therefore, the study of particle crushing and compaction properties of the crushed rocks has a crucial role in mining engineering. For example, ... The main reasons for the compression of saturated crushed gangue were as follows: (1) Under the action of the axial loading, gangue particles overcame the frictional resistance between particles. ...
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In solid backfilling coal mining (SBCM), the crushed gangue backfilling material (CGBM) is generally compacted circularly by a compaction machine in order to reduce its compressibility. …
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Gangue backfilling coal mining is a green mining technology aimed at the problems of "three-unders:" coal under buildings, under water and under railway and gangue accumulations [1, 2].The compaction characteristics of gangue filling materials play a decisive role in the effect and quality of filling mining [[3], [4], [5], [6]].Nan Zhou et al. used a SANS testing machine and …
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In this study, the coarse and fine aggregates of concrete were replaced by 100 % crushed coal gangue, and appropriate amounts of nano-SiO 2 and polypropylene fiber were …
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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 crushing …
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The coal fly ash concentration has a positive relationship with the acceleration factor. The permeability of crushed coal gangue follows a hierarchical distribution law and the permeability changes in the magnitude range of 10-11 ~ 10-9 m 2. The fractal dimension is inversely related to the permeability of crushed coal gangue.
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mutual occlusion and crushing of gangue blocks in the bearing-compression process can be well simulated by the proposed method. Through the 3-MATIC, the interface program in the 3D …
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Crushed gangue models were made by gangue block containing single shape blocks or mixed-shape blocks. The influence of block shape on the macro deformation response and meso-fabric evolution of crushed gangue under triaxial compression was studied. The main conclusions are as follows: Li et al. (2020a) [1] the more irregular the block shape ...
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This study utilizes crushed gangue from the Gangue Yard in Fuxin City as the research material. An in-house designed, large-scale, triaxial gangue compaction test system was used. ... The role of ...
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The permeability of crushed coal bodies plays a bottom neck role in seepage processes, which significantly limits the coal resource utilisation. ... The compaction and re-crushing characteristics of crushed gangue are important factors which affect the quality and effectiveness of the filling of the quarry. To study the compaction and re ...
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of gangue lling materials in the process of the bearing are obtained (Li et al. 2022a). The main inuencing factors of compaction experiments are rock lithology, crushed rock friction, loading method, sample saturation, etc. Pappas and Mark conducted the compaction experiments of crushed rock in the caving
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The crushed coal gangue particles are widely used in solid backfilling. However, the nonuniform compaction and internal re-crushing behavior of crushed coal gangue under …
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The irregular shape of gangue blocks will affect the coordination structure between blocks in the crushed gangue accumulation body, and then affect the engineering mechanical properties of crushed ...
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dissipation of crushed gangue was also analyzed, because gangue backfill controls the dynamic pressure through the ... Particle size plays an important role in gangue backll mining and determines the engineering application eect. Authors classied the particle sizes into small size (0–10 mm), medium size (10–20 mm)
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The results show that: (1) the bearing capacity of crushed gangue materials increases with the increase of confining pressure; (2) the block aggregate in the gangue sample is gradually compacted ...
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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 ...
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In the current research, a large number of studies have been carried out on the compressive macroscopic deformation characteristics of crushed gangue, and its research …
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The deformation and re-crushing characteristics of different lithological caving crushed gangues in mine goaf directly affect the overburden strata movement, which significantly affects the surface subsidence of mining goaf. The effect of particle size on the re-crushing characteristics of different lithological caving crushed gangues in mine goaf is investigated in this study based on an ...
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playing a key bearing role in the spatial structure of the goaf[9–11]. Some scholars have theoretically ... When measuring the breakage density of the crushed gangue body, plastic lm is used to ...
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As the construction industry evolves, studies like this one provide essential insights that can drive sustainable practices and improve the efficiency of resource use. The potential for crushed gangue to serve as a reliable construction material not only supports environmental goals but also enhances the economic viability of projects.
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