Li Jinyang, Zang Mingdong, Xu Nengxiong, et al. 2021. Influence of residual deformation of goaf to Sangzhang tunnel with probability integral method[J]. Journal of Engineering Geology, 29(2): 564-574. doi: 10.13544/j.cnki.jeg.2020-548.
    Citation: Li Jinyang, Zang Mingdong, Xu Nengxiong, et al. 2021. Influence of residual deformation of goaf to Sangzhang tunnel with probability integral method[J]. Journal of Engineering Geology, 29(2): 564-574. doi: 10.13544/j.cnki.jeg.2020-548.

    INFLUENCE OF RESIDUAL DEFORMATION OF GOAF TO SANGZHANG TUNNEL WITH PROBABILITY INTEGRAL METHOD

    • The deformation of overburden strata in goaf is a long-term process, seriously affecting the construction of tunnels that pass through the mining-induced subsidence zone. The Sangzhang tunnel is a typical case. Accurate predicting the influence of the residual deformation of goaf to Sangzhang tunnel is crucial to ensure its engineering safety. In this paper, a Boltzmann function is used to optimize the probability integral model of equivalent variable mining thickness, and a time function is introduced to put forward an improved model. We employ this modified model to predict the residual deformation of the four mining-induced subsidence zones in the Yangquan No.2 Mine, Shanxi Province, and then analyse the influence of the residual deformation of goaf to Sangzhang tunnel. The study indicates that the maximum residual settlement on the planned line of Sangzhang tunnel is 325 mm, appearing in the middle of the tunnel; the maximum residual lateral displacement is 168 mm, occurring near the start of the tunnel. As the axis of the Sangzhang tunnel intersects with the long axis of the mining-induced subsidence zone at a small angle, the tunnel shows a compound deformation trend of lateral movement, vertical settlement and axial torsion. Results in this paper can provide a scientific basis for the construction and deformation treatment of Sangzhang tunnel, and the adopted method can provide a theoretical support for the construction of tunnels that pass through mining-induced subsidence zones.
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