An experimental study of the permeability of sand-based cemented backfill under the influence of multi-factor interaction

Zhou, Nan; Xu, Jianfei; Zhang, Jixiong; Yan, Hao; Zhu, Cunli; Li, Meng

doi:10.1007/s12665-022-10441-6

Cited by 5 publications

(1 citation statement)

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“…It is concluded that the average peak strength of the cement-based backfill material increases with the increase in the length of the glass fiber. (Zhou et al, 2021a;Zhou et al, 2021b;Zhou et al, 2022). A green thixotropic cement filling material containing molybdenum tailings was prepared by Gao et al A thixotropic coefficient method based on the correlation between shear stress and time was proposed to evaluate the thixotropy of the paste.…”

Section: Introductionmentioning

confidence: 99%

Filling parameters and process optimization of mining–filling synergistic coal-based solid waste paste in Renjiazhuang mine

Li,

Chen,

Yang

2023

Front. Mater.

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In this paper, the authors address the issue of large solid waste output and surface subsidence in the western coal base. They focus on the 110904 filling working face of Renjiazhuang Mine and employ a combination of theoretical analysis, numerical simulation, and field practice to analyze the limit caving step and cycle pressure step of the working face. The authors propose a mining-filling coordination scheme called “three mining and one charging”. Through numerical simulation, they demonstrate that this scheme ensures the time-space continuity of the mining-filling cycle and is theoretically feasible. Additionally, the authors conduct nine groups of orthogonal simulation tests to identify the main factors affecting the filling effect. They conclude that the filling rate is the primary controlling factor, and there is a positive correlation between the filling rate and 1-day strength. The authors implement hanging pipe filling in the return air roadway of the 110904 working face, achieving a filling material 1-day strength of 2 MPa and a filling ratio of 80%. The mining-filling synergy scheme proves effective and feasible. However, the issue of pipe plugging during the filling process requires further optimization of the particle gradation in the subsequent filling material ratio scheme. Overall, the proposed mining-filling collaborative process serves as a theoretical reference for similar filling faces.

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Section: Introductionmentioning

confidence: 99%