The mechanical properties of the crushed gangue, such as compression deformation characteristics and seepage characteristics, are closely related to the 3D shape characteristics of gangue blocks. ... the role of phase/grain boundary in the static globularization of TC17 alloy was systematically studied by setting different α phase content ...
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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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The crushed particle size came from the complete caved zone gangue in the longwall goaf of a mine. The maximum thickness of the caved zone was about 20 m, and the
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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 …
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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, …
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the crushed gangue accumulated on the ground of mining areas in China has exceeded 6 billion tons, becoming ... mation characteristics play a decisive role in the rmness and stability of various ...
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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 …
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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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Read Morphological characterization of crushed coal gangue by micro X-ray computed tomography scanning. ... However, the scanning and analysis parameters play a significant role in the accuracy of the porosity value determined from CT scan. This paper presents details of an investigation carried out to understand the effect of system parameters ...
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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 investigated by ...
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Granular gangues should be crushed into fine particles and dehydrated before backfilling. Gangue, produced from coal mining and washing process, is a serious threat to the …
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The crushed coal gangue particles are widely used in solid backfilling. ... The role of gangue on the mitigation of mining-induced hazards and environmental pollution: An experimental investigation. D. Ma Hongyu Duan Jiang-feng Liu Xibing Li Zilong Zhou. Environmental Science, Engineering.
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The stress–strain relationship of crushed gangue in the compaction process increases exponentially and can be divided into void compaction stage, structure adjustment stage and …
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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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The compaction and re-crushing characteristics of crushed gangue are important factors which affect the quality and effectiveness of the filling of the quarry.
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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 …
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The compressive characteristics of crushed gangue with different particle sizes as shown in Fig. 5. The crushed gangue with a small particle diameter (0–10 mm) resists compressive deformation most effectively among the four particle gradations. Since the porosity of gangue increases with the …
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The permeability of crushed coal gangue follows a hierarchical distribu-tion 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. The experimental results show that the coal gangue will be further crushed and
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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 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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In the process of coal mining, the discharge of crushed gangue accounts for 15%~20% of coal output. At present, the crushed gangue accumulated on the ground of mining areas in China has exceeded 6 billion tons, becoming the largest industrial solid waste in China 1–3.The accumulation of crushed gangue on the ground causes a series of environmental …
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The permeability of crushed coal gangue follows a hierarchical distribu-tion 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. The experimental results show that the coal gangue will be further crushed and. WhatsApp: +86 ...
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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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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]].
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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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Crushed gangue, an inhomogeneous and discontinuous medium, is accompanied with the absorption and dissipation of energy under compression. In order to study the compressive deformation and energy ...
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The research process includes CT scanning test of the external contour of the randomly selected gangue block, reconstruction of 3D model of real shape of gangue block, acquisition and classification of 3D shape parameters of gangue block, construction of particle flow numerical model of crushed gangue with different block shapes under the triaxial …
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To accurately estimate the separation effects and breakage characteristics of coal and gangue particles (CGPs), it is of great significance to understand the meso-morphologies …
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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 …
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