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Research on stability of a slope due to underground mining

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Journal of Coal Science and Engineering (China)

Abstract

This paper will present a detailed analysis of the deformation mechanism and stability assessment of the slope through field investigations, numerical modeling and measurements. Field investigation indicated that three thin coal seams encountered large mined-out area at one side and free surface of hill slope at the other side, which lead to the caving of roof strata movement, ground movement and crown crack along the preferred orientations of joints. The three-dimensional numerical modeling study on the case demonstrated that the plasticity failure occurred gradually along with the extension of mined-out area in depth. When the depth of mining reached the verge defined by the seismic prospecting method, a large mount of tension failure occurred on the crown of the slope. The factor of safety was 1.36 calculated by the shear strength reduction technique, which indicated the slope was in stable state. The measurement showed that the residual deformation occurred before 1998 and became stable subsequently, which indicated that the residual deformation almost finished and the slope is in stable state.

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Authors and Affiliations

  1. Mine Safety Technology Branch, China Coal Research Institute, Bei**g, 100013, China

    Hong-Jie Li

  2. State Key Laboratory of Coal Mining and Clean Utilization (China Coal Research Institute), Bei**g, 100013, China

    Hong-Jie Li

  3. Mid-South Design and Research Institute, CHECG, Changsha, 410014, China

    Hui-Ya Zhong

  4. China Institute of Water Resources and Hydropower Research, Bei**g, 100048, China

    Wei-Chao Li

Authors
  1. Hong-Jie Li
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  2. Hui-Ya Zhong
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  3. Wei-Chao Li
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Correspondence to Hong-Jie Li.

Additional information

Supported by the National Natural Science Foundation of China for Youth (51004065); the National Basic Research Program of China (2012CB724208)

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Li, HJ., Zhong, HY. & Li, WC. Research on stability of a slope due to underground mining. J Coal Sci Eng China 19, 474–482 (2013). https://doi.org/10.1007/s12404-013-0406-y

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  • DOI: https://doi.org/10.1007/s12404-013-0406-y

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