What does this research mean for the field?

A newly developed mechanical model utilizing a reconceptualized subsidence angle accurately predicts surface movement dynamics in sublevel caving mining, demonstrating that topography, backfill elevation, and mining depth dictate the symmetry and intensity of surface fracturing. Novelty: ClaimNovelty.METHODOLOGICAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To develop and validate a mechanical model predicting surface movement dynamics and displacement boundaries induced by sublevel caving mining under varied terrain, backfill, and depth conditions.

September 5, 2026Geomechanics and Geophysics for Geo-Energy and Geo-ResourcesOpen Access

Research on theoretical model and patterns of surface subsidence by sublevel caving mining under multiple factors

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Authors

KMKai MaState Key Laboratory of Luminescent Materials and Devices YZYong ZhaoNortheastern University TYTianhong YangNortheastern University

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Implication

Simulation and field monitoring reveal surface subsidence patterns under sublevel caving, indicating terrain and mining depth alter fracturing zones.

Key Points

To develop and validate a mechanical model predicting surface movement dynamics and displacement boundaries induced by sublevel caving mining under varied terrain, backfill, and depth conditions.
Formulated a mechanical model introducing a reconceptualized subsidence angle calculation based on mechanics principles.
Validated theoretical findings using combined underground and surface field monitoring at the Dahongshan Iron Mine alongside numerical simulation calculations.
Evaluated the influence of topography, initial caved zone backfill elevation, and mining depth on stress distributions and deformation.
Flat terrain produces symmetric subsidence zones, whereas sloped landscapes generate asymmetrical profiles with larger hanging wall subsidence areas despite higher hanging wall subsidence angles.
Backfilling the initial caved zone reduces tensile stress magnitude without substantially altering distribution areas, thereby suppressing surface fracturing.
Surface principal stress from the subsidence center toward the open-pit slope transitions through four zones: compression decay, tensile increase, tensile fluctuation, and rapid compression increase.

Cite This Study

Ma et al. (2026) studied this question.

synapsesocial.com/papers/6a9bd48c6b95aff0620ec46d https://doi.org/10.1007/s40948-026-01226-3

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Implication

Simulation and field monitoring reveal surface subsidence patterns under sublevel caving, indicating terrain and mining depth alter fracturing zones.

Research on theoretical model and patterns of surface subsidence by sublevel caving mining under multiple factors

Discussion

Member takes

Implication

Key Points

Cite This Study

Research on theoretical model and patterns of surface subsidence by sublevel caving mining under multiple factors

Discussion

Member takes

Implication

Key Points

Cite This Study

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