Prediction of compression and deformation behaviours of gangue backfill materials under multi-factor coupling effects for strata control and pollution reduction

Meng, Guohao; Zhang, Jixiong; Li, Meng; Zhu, Cunli; Zhang, Qiang

doi:10.1007/s11356-020-09465-x

Cited by 15 publications

(4 citation statements)

References 35 publications

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“…Both practical experience and theoretical research confirm that rock pressure was the result of multi-factor interaction and coupling, making it difficult or even unlikely for a single factor to directly cause rock pressure. The characteristics of multi-factor coupling align with the core principles of multi-factor decision-making theory, and there are specific conditions for its application [ [15] , [16] , [17] , [18] ]. Therefore, in order to address the limitations of existing research on predicting rock pressure manifestation strength in mining areas, this article employs a multi-factor decision-making approach and introduces the "dual-dimension rock pressure strength evaluation method" based on the sedimentary pressure control law and rock pressure control mechanism.…”

Section: Introductionmentioning

confidence: 99%

Rock pressure evaluation in coal face based on multi-factor decision-making theory

Sun,

Chen,

Hou

et al. 2024

Heliyon

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Section: Introductionmentioning

confidence: 99%

Rock pressure evaluation in coal face based on multi-factor decision-making theory

Sun,

Chen,

Hou

et al. 2024

Heliyon

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“…Fu et al conducted a sensitivity analysis of filler strength and found that the filler strength obeyed an exponential function with mass fraction and a linear function with the ash/sand ratio [ 19 ]. Meng et al developed a low-cost, high-quality filling cementitious material using slag micronized powder and studied the hydration mechanism of the new filling cementitious material [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Optimization of Coal-Based Solid Waste Filling Slurry Ratio Based on the Response Surface Method

Wei

Yang²,

et al. 2022

Materials

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The large production and low comprehensive utilization rate of solid waste from coal power base affects the efficient and coordinated development of regional resources and the ecological environment. In order to promote utilization of solid waste from coal power base, coal gangue, fly ash, and gasification slag are mixed as raw materials to prepare filling materials, and a study on the evolution law of the mechanical properties of coal-based solid waste filling body is systematically carried out. After clarifying the physical and chemical properties of the filling materials, the Box–Behnken experimental design method was used to study the effects of slurry mass fraction, coal gangue, fly ash, and gasification slag on the strength of the filling body based on the response surface-satisfaction function coupling theory. Furthermore, a multivariate nonlinear regression model was constructed for the strength of the filling body at different maintenance ages. Based on the analysis of variance (ANOVA) and the response surface function, the impact mechanism of influencing factors and their interaction on the strength of filler were revealed. The results show that the strength of the filler is affected by single factors and interactions between factors. The interaction of slurry mass fraction and gangue dosing has a significant effect on the strength of the filler in the early stage; the interaction of fly ash and gangue dosing has a significant effect on the strength of the filler in the middle stage; the interaction of slurry mass fraction and gasification slag dosing has a significant effect on the strength of the filler in the final stage. The mixed filling materials significantly affect the strength of the filler as the maintenance time is extended. The mixed filling materials are extensively interlaced with the hydration products, calcium alumina, and calcium silicate hydrate (C-S-H) gel, forming a stable three-dimensional spatial support system as the maintenance time increases. The best ratio to meet the requirements of mine filling slurry pipeline transportation and filling body strength was selected using the regression model and the proposed economic function of filling material.

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“…Then, the stress-strain curve of granular material was separated into the initial compaction stage with low stress and elastic compaction stage with high stress [5]. As a result, it has been concluded that the nonlinear behavior of granular materials was displayed [6][7][8][9][10]. Meanwhile, the deformation resistance of granular materials is affected by the particle shape, stiffness, dimension, and granular gradation [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

A Numerical Model for the Compressive Behavior of Granular Backfill Based on Experimental Data and Application in Surface Subsidence

et al. 2022

Metals

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Granular backfill is generally confined in stopes to bear underground pressure in metal mines. Its mechanical behavior under lateral confinement is vital for controlling stope wall behavior and estimating surface subsidence in backfill mining operations. In this paper, an experimental apparatus has been developed to explore the bearing process of granular material. Pebbles were selected to model granular backfill. A series of compression experiments of pebble aggregation were performed under lateral confinement condition using the experimental apparatus. The bearing characteristics of the pebble aggregation with seven gradations were analyzed. Based on the experimental data, a constitutive model that takes the real physical characteristics of granular material into account was proposed with variable deformation modulus. The constitutive model was implemented into the FLAC3D software and verified basically by comparison with experimental results. The surface subsidence in backfilling mines was studied using the proposed model. The effects of the particle size of the granular backfill and the height and buried depth of mined-out stopes on surface subsidence have been clarified. The research results are of great significance for guiding backfill mining and evaluating surface subsidence and movement.

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Prediction of compression and deformation behaviours of gangue backfill materials under multi-factor coupling effects for strata control and pollution reduction

Cited by 15 publications

References 35 publications

Rock pressure evaluation in coal face based on multi-factor decision-making theory

Rock pressure evaluation in coal face based on multi-factor decision-making theory

Experimental Study on the Optimization of Coal-Based Solid Waste Filling Slurry Ratio Based on the Response Surface Method

A Numerical Model for the Compressive Behavior of Granular Backfill Based on Experimental Data and Application in Surface Subsidence

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