Large diameter shafts for underground infrastructure

Dias, Tiago Gerheim Souza; Farias, Márcio Muniz de; Assis, André Pacheco de

doi:10.1016/j.tust.2014.09.010

Cited by 13 publications

(5 citation statements)

References 8 publications

(6 reference statements)

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“…Ma 12 founded through numerical simulation that the high dip angle of the ore bodies, faults and fractures is the main reason for the collapse of the vertical shaft of Jinchuan Nickel Mine. Dias 13 used the finite element model established by CESAR-LCPC to analyze the influence of construction sequence and geological deposition on shaft capability, especially induced settlement. Walton 14 built a three-dimensional finite difference model of circular and elliptical shaft through Universal Distinct Element Code, and studied the factors affecting the relative stability of the shaft geometry.…”

Section: Introductionmentioning

confidence: 99%

Research of deformation law about guide rails under the action of mining deformation in mine vertical shaft

Zhao

Han

et al. 2023

Sci Rep

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To lay a foundation for alleviating the influence of mining shaft deformation (MSD) on the guide rail (GR) and monitoring the shaft deformation state, this paper studies the deformation law and mechanism of the guide rail under the MSD. Firstly, a spring is used to simplify the interaction between the shaft lining and surrounding rock soil mass (SRSM) under MSD, and its stiffness coefficient is deduced by the elastic subgrade reaction method. Secondly, a simplified finite element model is established based on spring element, the stiffness coefficient is calculated by the derivation formula, and its effectiveness is verified. Finally, the deformation law and mechanism of GR are analyzed under different types and degrees of MSD, and the deformation characteristics are studied under the disconnection between the shaft, bunton and guide rail. The results show that the established finite element model can better simulate the interaction between the shaft lining and SRSM, and the calculation efficiency is greatly improved. The guide rail deformation (GRD) has a strong ability to characterize MSD and owns the distinctive feature corresponding to different types and degrees of MSD and the connection state. This research can provide reference and guidance for the shaft deformation monitoring and the maintenance and installation of the GR, and also lays a groundwork for studying operation characteristic of hoisting conveyance under MSD.

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Section: Introductionmentioning

confidence: 99%

Research of deformation law about guide rails under the action of mining deformation in mine vertical shaft

Zhao

Han

et al. 2023

Sci Rep

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“…Large‐diameter shafts are structures, typically of circular cross‐section, that are used in many engineering applications. Often used as part of underground infrastructure such as subway stations (Figure 1) and access points, they are also commonly used for underground facilities and as buried reservoirs 1 . The proper design of shafts must take into consideration static and dynamic external loads, which can be caused by machinery attached directly to the shaft, as well as by seismic excitation.…”

Section: Introductionmentioning

confidence: 99%

“…Often used as part of underground infrastructure such as subway stations (Figure 1) and access points, they are also commonly used for underground facilities and as buried reservoirs. 1 The proper design of shafts must take into consideration static and dynamic external loads, which can be caused by machinery attached directly to the shaft, as well as by seismic excitation. Due to the large dimensions of these shafts, common modeling simplifications used, for example, in plate and pile modeling, are inadequate for these structures.…”

Section: Introductionmentioning

confidence: 99%

Dynamic response of large diameter, concrete‐lined vertical shafts under external and seismic excitation

Guerra

Labaki

Barros

2022

Num Anal Meth Geomechanics

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This article proposes a novel numerical model of the dynamic response of large diameter, concrete‐lined circular shafts, embedded in transversely isotropic soils. Excitation is given as time‐harmonic external loads applied to the base of the shaft, or vertically propagating, time‐harmonic pressure waves. The concrete lining is modeled with finite annular plate and cylindrical‐shell finite elements, while the contact tractions at the shaft–soil interface are modeled within a boundary elements framework. The response of the coupled system is obtained by imposing rigorous continuity and equilibrium conditions at the interface. The model yields accurate representation of the energy exchange between shaft and soil, as well as energy propagation through the soil as an unbounded medium. Original numerical results are presented on the response of the shaft and lining for selected geometric and constitutive parameters, frequencies and type of excitation, and anisotropic soil constitutions.

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“…Research on vertical shafts has been going on for a long time, and elastic and viscoelastic analytical solutions of vertical shafts have been proposed by researchers [8]. In recent years, scholars studied the deformation failure mode of vertical shafts mainly through numerical simulation methods [9][10][11] and physical simulation experiments [12][13][14]. Field deformation monitoring [15] was also an effective means to investigate the deformation failure mechanism of vertical shafts.…”

Section: Introductionmentioning

confidence: 99%

Deformation Failure Mechanism of Deep Vertical Shaft in Jinchuan Mining Area

Sun

Guo

et al. 2020

Sustainability

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Vertical shafts play an important role in the safe operation of mines. The stability of vertical shafts has always been a difficult problem in mining engineering, especially with the increasing of mining depth. In order to keep the engineering works stable, it is necessary to make the deformation failure mechanism of vertical shafts clear. This paper describes a case study of the deformation and failure mechanisms of the vertical shaft in Jinchuan No. 2 mining area in Gansu Province, China. Long-term deformation trends and characteristics of the vertical shaft are analyzed through ground movement and GPS monitoring of ground fissures. Then, based on previous research experience and a detailed field investigation, the modes, influencing factors, and mechanisms of deformation failure in the vertical shaft are studied. To further investigate the mechanism of shaft deformation failure and damage process under mining, the Universal Discrete Element Code (UDEC) software with Trigon approach is employed to build the numerical model of the vertical shaft. Through displacement, stress, and damage analysis, the time, location, and cause of vertical shaft failure during mining are explicitly illustrated. The results suggest that the upper and lower parts of the fault are activated in different ways. The damage to the vertical shaft is still developing at a very high rate under mining with filling method. All our results throw light on the nature of deformation and failure of vertical shafts, and several suggestions for the engineering of deep vertical shafts are finally put forward, providing a reference for other engineering.

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Large diameter shafts for underground infrastructure

Cited by 13 publications

References 8 publications

Research of deformation law about guide rails under the action of mining deformation in mine vertical shaft

Research of deformation law about guide rails under the action of mining deformation in mine vertical shaft

Dynamic response of large diameter, concrete‐lined vertical shafts under external and seismic excitation

Deformation Failure Mechanism of Deep Vertical Shaft in Jinchuan Mining Area

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