Orebody cavability prediction challenges in block caving mining — a review

Suzuki Morales, Kimie; Suorineni, Fidelis T.; Hebblewhite, Bruce

doi:10.1007/s10064-023-03516-6

Cited by 2 publications

(1 citation statement)

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“…The crushed ores will further squeeze, slide, and rotate each other, and the unsupported and collapsed ore body collapses under its own weight. This complex mechanical behavior of the ore body during undercut caving mining is difficult to describe through theoretical analysis [14]. Scholars, both domestically and internationally, have investigated the theoretical methods concerning the stability and ground pressure manifestation of the bottom structure in natural collapse methods and the stress evolution of the overlying rock layer.…”

Section: Introductionmentioning

confidence: 99%

Study on the Effect of the Undercut Area on the Movement Law of Overburden Rock Layers in the Block Caving Method

Qin,

Yang,

Liang

et al. 2024

Applied Sciences

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We chose to study the bottom structure stress evolution law in the process of undercut area advancement via the block caving method, reveal the influence law of the undercut rate on the effect of the ore body caving process, and assess the floor stress evolution law in the process of the undercut area with a different undercut rate in order to guide the production of a natural disintegration method under horizontal ground stress and also provide some reference value for rock damage assessment. According to the actual engineering and physical parameters of the mine, a numerical simulation model was created by using finite discrete element software GPI-3D-FDEM, and the Neo–Hookean hyperelastic constitutive model was adopted for calculation purposes. The simulation process follows a backward bottoming approach and monitors and analyses the stress state of the substructure after each bottoming step. The indoor physical model is employed to conduct similar two–dimensional simulation experiments on similar materials, investigating the motion laws of overlying rock layers. The research findings indicate that as bottom blasting progresses, a gradual concentration of compressive stress occurs in the foundation structure ahead of the advancing line. If this stress surpasses the rock mass’s shear failure limit, ground pressure failure may ensue. During mineral extraction from the bottom, internal stress within the fractured fault zone significantly diminishes compared to adjacent rock and ore deposits.

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Section: Introductionmentioning

confidence: 99%