Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Large-Scale Failure Mechanism of a Footwall with Steeply Inclined Discontinuities in a Sublevel Caving Mine
In a metal mine adopting a sublevel caving (SLC) method, life-of-mine and temporary mine infrastructures are preferred to be positioned on the footwall side of the ore body. Therefore, the footwall stability, especially well developed with steeply inclined discontinuities, is a major concern in an SLC mine. In response to this issue, a comprehensive investigation of the large-scale footwall failure mechanism has been conducted. The load-bearing structure responsible for footwall large-scale failure has been recognized. Subsequently, by adopting limit equilibrium theory, an improved mechanical model of overlapping cantilever beams is proposed for evaluating the footwall stability and determining its failure scope. In this model, a relationship between footwall movement and lateral force acting on the caved zone side of the footwall is built, considering the footwall movement and its compression effect on the caved zone. A validation study of this improved mechanical model is conducted and the calculation results are compared with the in situ monitoring data. It is shown that this improved model offers a more realistic simulation of lateral force acting on the caved zone side of the footwall. The proposed improved model can be utilized for other practical applications involving footwall large-scale failure under similar geotechnical conditions.
Large-Scale Failure Mechanism of a Footwall with Steeply Inclined Discontinuities in a Sublevel Caving Mine
In a metal mine adopting a sublevel caving (SLC) method, life-of-mine and temporary mine infrastructures are preferred to be positioned on the footwall side of the ore body. Therefore, the footwall stability, especially well developed with steeply inclined discontinuities, is a major concern in an SLC mine. In response to this issue, a comprehensive investigation of the large-scale footwall failure mechanism has been conducted. The load-bearing structure responsible for footwall large-scale failure has been recognized. Subsequently, by adopting limit equilibrium theory, an improved mechanical model of overlapping cantilever beams is proposed for evaluating the footwall stability and determining its failure scope. In this model, a relationship between footwall movement and lateral force acting on the caved zone side of the footwall is built, considering the footwall movement and its compression effect on the caved zone. A validation study of this improved mechanical model is conducted and the calculation results are compared with the in situ monitoring data. It is shown that this improved model offers a more realistic simulation of lateral force acting on the caved zone side of the footwall. The proposed improved model can be utilized for other practical applications involving footwall large-scale failure under similar geotechnical conditions.
Large-Scale Failure Mechanism of a Footwall with Steeply Inclined Discontinuities in a Sublevel Caving Mine
Int. J. Geomech.
Yang, Kuoyu (Autor:in) / Li, Sihan (Autor:in) / Xia, Kaizong (Autor:in) / Chen, Congxin (Autor:in) / Shen, Wenlong (Autor:in) / Deng, Ke (Autor:in)
01.08.2024
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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Identifying and Describing a Seismogenic Zone in a Sublevel Caving Mine
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Identifying and Describing a Seismogenic Zone in a Sublevel Caving Mine
| Online Contents | 2016