Seismic Stability of 3D Rock Slopes Based on a Multi-cone Failure Mechanism

Xu, Jingshu; Du, Xiuli

doi:10.1007/s00603-022-03112-2

Cited by 13 publications

(2 citation statements)

References 22 publications

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“…Currently, there is a dearth of research on the coupling characteristics between the coal wall and the face guard mechanism. Therefore, considering that rib spalling frequently takes place in the upper and middle coal seam 30 , 31 , based on the ZZ18000/33/72D four-column support shield hydraulic support, this article aims to establish mechanical models for both integral-type and split-type face guard mechanism of the ZZ18000/33/72D hydraulic support, and compare and analyze the load-bearing disparities between these two structural forms of face guard mechanism. Additionally, based on prevalent rib spalling forms, a rigid-flexible coupling model between the coal wall and the rib mechanism under various spalling forms is established, the force transmission characteristics of pivotal hinge points and the load-bearing response of the face guard mechanism under the various coupling states of rib spalling are explored.…”

Section: Introductionmentioning

confidence: 99%

Research on the hydraulic support face guard mechanism and coupling characteristic of rib spalling in large mining heights

Zeng,

Ma,

Wan

et al. 2024

Sci Rep

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In view of the problem of poor coupling adaptability and easy rib spalling of coal wall in large mining height comprehensive mining, based on the effective inhibition effect of face guard mechanism on coal wall spalling, the structural characteristics and bearing capacity of different structural forms of the face guard mechanism are compared and analyzed. According to the surrounding rock adaptability of the face guard mechanism, established a numerical analysis model for rigid-flexible coupling of the face guard mechanism under different spalling forms. In order to accurately simulate the stress state of the protective mechanism, a variable stiffness spring damping system is used to replace the hydraulic cylinder. The load-bearing performance and response characteristics of the face guard mechanism under rib spalling coupling conditions were analyzed by applying uniform normal load and impact load to the face guard. The findings indicated that, the integral-type face guard mechanism has a better effect on suppressing rib spalling. When the face guard mechanism bears the static load of the coal wall, the entire response process of the face guard jack can be divided into three stages: initial support, increasing resistance bearing, constant resistance bearing; both the impact load position and the coupling state of the rib spalling will affect the characteristics of force transmission at the face guard mechanism’s hinge point, the hinge point between the extensible canopy and the primary face guard is most sensitive to biased load. The research results can provide reference for optimizing the face guard mechanism of large mining height hydraulic support and improving the reliability of coal wall support.

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Section: Introductionmentioning

confidence: 99%

Research on the hydraulic support face guard mechanism and coupling characteristic of rib spalling in large mining heights

Zeng,

Ma,

Wan

et al. 2024

Sci Rep

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“…More recently, a series of failure mechanisms was proposed by Park and Michalowski [15][16][17] to introduce nonlinear strength criteria directly to stability analysis of rock slopes. Thereafter, a seismic stability analysis in rock slopes was conducted by Xu and Du [18] to propose a series of seismic stability charts. Probabilistic analyses for 3D slopes were conducted by Hu and Sun et al [19,20] to investigate the related parameters on the stability of rock slopes.…”

Section: Introductionmentioning

confidence: 99%

Effect of Rock Mass Disturbance on Stability of 3D Hoek–Brown Slope and Charts

Xu,

Wang,

Xie

et al. 2023

Buildings

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The present study performs a stability analysis of a three-dimensional (3D) rock slope in disturbed rock masses following the Generalized Hoek–Brown (GHB) failure criterion. The factor of safety (FoS) of the slope is derived and the optimal solution is captured combining the limit analysis method and the strength reduction technique. It is indicated by the parametric analysis that the 3D geometric characteristics have a significant impact on slope stability such that FoS decreases sharply with the increase in the width-to-height ratio B/H within 0<B/H≤2.0 and thereafter reaches a constant value asymptotically. The FoS decreases more than 60% linearly when the disturbance factor D increases from 0 to 1.0. Stability charts and slope angle weight factor fβ_3D for 3D slopes are proposed to provide a convenient and straightforward approach to obtain the FoS solutions of 3D slopes. A case study was carried out to apply the stability charts on practical engineering cases, which showed that slope stability under two-dimensional (2D) plane strain will lead to conservative results, and a 3D stability analysis of slope is more appropriate, especially for a slope with a limited width.

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Three-dimensional stability analysis of tunnel face considering the upper partial failure in layered rock masses

Chen,

Zou

2024

Bull Eng Geol Environ

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Seismic Stability of 3D Rock Slopes Based on a Multi-cone Failure Mechanism

Cited by 13 publications

References 22 publications

Research on the hydraulic support face guard mechanism and coupling characteristic of rib spalling in large mining heights

Research on the hydraulic support face guard mechanism and coupling characteristic of rib spalling in large mining heights

Effect of Rock Mass Disturbance on Stability of 3D Hoek–Brown Slope and Charts

Three-dimensional stability analysis of tunnel face considering the upper partial failure in layered rock masses

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