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Abstract <p>Accurate calculation model is essential for understanding the rock movement, especially in goafs in mountainous terrain and irregular working faces. This paper proposes an improved model based on the stochastic medium theory of unit basins, introducing the concept of slope propagation. By employing the strip method, semi-analytical calculation formula is derived for the surface subsidence and movement caused by mining of arbitrary trapezoidal working faces on general and mountainous terrain. The model is then verified by comparison with monitoring data of Longshanmiao Mine. At the same time, the snake optimization algorithm (SOA) is used to invert the model parameters, and the constructed model is successfully applied to the calculation of surface subsidence and movement in the Gucheng Mine. The results show that there are multiple centers of surface subsidence, locally concentrated on the surface of the goaf group. The surface subsidence is funnel-shaped, and the maximum subsidence is located in the center of the funnel with a value of − 1664.41&#xa0;mm. The horizontal movement of the goaf surface exhibits a gradual and smooth transition from an uplifted area to a depressed basin. The proposed calculation model addresses shortcomings of traditional stochastic medium theory model in dealing with mountainous terrain and irregular working faces.</p> Highlights <p><UnorderedList Mark="Bullet"> <ItemContent> <p>Surface subsidence and movement in mining in mountain terrain can be calculated effectively by inclusion of slope influence propagation angle.</p> </ItemContent> <ItemContent> <p>The parameters calculated by inversion using snake optimization algorithm (SOA) have high consistency.</p> </ItemContent> <ItemContent> <p>When multiple working faces exist during mining simultaneously, there are multiple funnel centers on the surface.</p> </ItemContent> <ItemContent> <p>The horizontal movement of the goaf surface exhibits a gradual and smooth transition from an uplifted area to a depressed basin.</p> </ItemContent> </UnorderedList></p>

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Prediction of Surface Subsidence and Movement for Arbitrary Polygonal Working Surface in Mountainous Terrain

  • 期刊论文

  • 发表日期：

    2025年6月6日

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  • Gang Wang,
  • Chao Chen,
  • Yu Liu,
  • Daolong Chen,
  • Jinjin Liu,
  • Jenisha Singh

摘要

Abstract

Accurate calculation model is essential for understanding the rock movement, especially in goafs in mountainous terrain and irregular working faces. This paper proposes an improved model based on the stochastic medium theory of unit basins, introducing the concept of slope propagation. By employing the strip method, semi-analytical calculation formula is derived for the surface subsidence and movement caused by mining of arbitrary trapezoidal working faces on general and mountainous terrain. The model is then verified by comparison with monitoring data of Longshanmiao Mine. At the same time, the snake optimization algorithm (SOA) is used to invert the model parameters, and the constructed model is successfully applied to the calculation of surface subsidence and movement in the Gucheng Mine. The results show that there are multiple centers of surface subsidence, locally concentrated on the surface of the goaf group. The surface subsidence is funnel-shaped, and the maximum subsidence is located in the center of the funnel with a value of − 1664.41 mm. The horizontal movement of the goaf surface exhibits a gradual and smooth transition from an uplifted area to a depressed basin. The proposed calculation model addresses shortcomings of traditional stochastic medium theory model in dealing with mountainous terrain and irregular working faces.

Highlights

Surface subsidence and movement in mining in mountain terrain can be calculated effectively by inclusion of slope influence propagation angle.

The parameters calculated by inversion using snake optimization algorithm (SOA) have high consistency.

When multiple working faces exist during mining simultaneously, there are multiple funnel centers on the surface.

The horizontal movement of the goaf surface exhibits a gradual and smooth transition from an uplifted area to a depressed basin.