Key theory and technology of cemented paste backfill for green mining of metal mines

Wu, Aixiang; Wang, Yong; Ruan, Zhu’en; Xiao, Bolin; Wang, Jiandong; Wang, Linqi

doi:10.1016/j.gsme.2024.04.003

Cited by 14 publications

(1 citation statement)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Coal mining can give rise to significant ecological and environmental issues on the surface, including surface subsidence, structural damage of buildings, and loss of surface water resources [1][2][3][4][5]. The primary reason for these issues is the instability of the overlying strata beam, resulting from coal extraction [6][7][8][9][10]. Paste backfill technology, a crucial component of green coal mining, plays a vital role in prolonging mine lifespan, supporting the overlying strata, and mitigating ground collapse in coal mines [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Study on the Partial Paste Backfill Mining Method in a Fully Mechanized Top-Coal Caving Face: Case Study from a Coal Mine, China

Du,

Chen,

et al. 2024

Sustainability

View full text Add to dashboard Cite

Paste backfill mining is an significant part of green coal mining, which can improve resource utilization and extend the service life of mines. It is important for solving the “three under, one above” mining problem and avoiding industrial wastes such as coal gangue and fly ash that occupy farmland and pollute the environment. To address the difficult filling problem of a fully mechanized top-coal caving face (FMT-CCF), a new method of partial paste backfill mining is herein proposed. First, the partial paste backfill mining method and implementation steps of the FMT-CCF are introduced in detail. Then, the mechanistic model of the roof beam in partial paste backfill mining is established. Then, the filling structural factors on the filling effect of the 42105 FMT-CCF are determined. Dependent on the assay of the migration law of overlying stratum after filling, numerical simulation analysis is used to research the feature effect of the main filling structural factors on the filling effect. Finally, the paste filling rate, filling width, and filling strength suitable for the 42105 FMT-CCF are obtained. When the filling rate reaches 100%, a significant alteration takes place, resulting in the efficient decrease of the overlying rock stress arch shell’s height. As the width of the filling body expands from 10 m at each end to 20 m, the stress arch of the overlying rock experiences maximum reduction, specifically decreasing by approximately 14 m. When the strength of the filling body is greater than 0.4 GPa, the filling effect is better. This study has important guidance and reference significance for the partial paste backfill of FMT-CCF in thick seam mining.

show abstract