Mine development leads to inevitable environmental consequences resulting in so called ‘mine hazard’, which occur extensively over a long period of time across a large area. The mine subsidence is considered as one of the most serious mine hazards, while the proper method is required to evaluate the mine subsidence risk. In this study, a new assessment technique to evaluate the subsidence risk in mining areas was developed using numerical and statistical analysis. Numerical simulations using FLAC2D and strength reduction method were performed to evaluate the effect of geometrical features of cavities and rock mass conditions on the ground subsidence. Based on the numerical results, the relationship between the influencing factors and the factor of safety was quantitatively obtained. It was found that the rock mass condition, height and thickness of a mined cavity has a negative effect on the subsidence while the depth and inclination of the cavity has a positive effect. The prediction model for subsidence hazard level (SHL) was proposed from the statistical regression analysis. The proposed assessment technique considered two additional important factors which were the influence area of subsidence at surface and the interaction of multiple cavities. Finally, the developed assessment technique was applied to an actual mine site to validate its accuracy. The result showed that predicted subsidence hazard map had a good agreement with the subsidence traces observed in the mine site.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Assessment of Subsidence Hazard in Abandoned Mine Area Using Strength Reduction Method


    Additional title:

    KSCE J Civ Eng


    Contributors:

    Published in:

    Publication date :

    2022-10-01


    Size :

    21 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Abandoned mine ecological forest maintenance system

    HE NANA / ZHANG JINGHANG / LU CHANGJIANG et al. | European Patent Office | 2023

    Free access

    Innovative Techniques for Stabilizing Abandoned Mine Shafts

    Stover, B. | British Library Conference Proceedings | 1989


    Energy storage system utilizing abandoned mine pit

    ZENG RONG / ZHANG TAO / YAN YANLEI et al. | European Patent Office | 2024

    Free access

    GROUND SUBSIDENCE AREA SPECIFICATION DEVICE, VEHICLE CONTROL DEVICE, AND GROUND SUBSIDENCE AREA SPECIFICATION SYSTEM

    YOKOYAMA DAIKI / KAGEURA YOSHIYUKI / SHIMADA MASANORI et al. | European Patent Office | 2023

    Free access

    Evaluation of Mine Subsidence Conditions using Borings and Downhole Investigation Techniques

    Knott, David L. / Gray, Richard E. / Lea, John et al. | TIBKAT | 2022