Numerical Simulation of the Impact of Unmined Longwall Panel on the Working Stability of a Longwall Using UDEC 2D—A Case Study

Rajwa, S.; Janoszek, Tomasz; Świątek, Janina; Walentek, Andrzej; Bałaga, D.

doi:10.3390/en15051803

Cited by 4 publications

(1 citation statement)

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“…Wesolowski, M et al utilized computer simulation to examine the influence of mine working flooding on the surface of a mining area [37]. Rajwa, S et al conducted numerical simulations to investigate the causes of damage to a longwall located beneath an unmined longwall panel [38]. These scholars obtained promising experimental results through simulation techniques.…”

Section: Introductionmentioning

confidence: 99%

Surface Subsidence Prediction Method for Backfill Mining in Shallow Coal Seams with Hard Roofs for Building Protection

Huo,

Li,

Guo

et al. 2023

Sustainability

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The mining of shallow coal seams with hard roofs poses a threat to surface structures. In order to ensure the protection of these buildings, backfill mining is increasingly used in these types of coal seams. However, due to the lack of appropriate surface subsidence prediction methods, there are concerns about whether backfill mining can meet the requirements of building protection. In this study, through numerical simulation and physical experiments, the movement characteristics of the strata and surface were studied in the backfill mining of a shallow coal seam with a hard roof. Our results indicate that the backfilling ratio significantly influences strata movement and surface subsidence. As the backfilling ratio increases, the surface deformation in the backfill under the hard roof of the shallow coal seam transitions from discontinuous to continuous. When the backfilling ratio exceeds 60%, the deformation characteristics of the overburden and surface align with the probability integral method model. Consequently, a novel surface subsidence prediction method for backfill mining in shallow coal seams under hard roofs is proposed. This method was successfully applied at Yungang Mine, validating its effectiveness. These research findings have significant practical implications for the design of backfill mining in shallow coal seams under hard roofs.

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Section: Introductionmentioning

confidence: 99%