With delayed backfill, excavating two or more stopes longitudinally can cause stress relaxation that redistributes stresses in an arch shape around the stopes (Figure 4).

In this case, the methodology has proven successful in simulating the historical stope performance through the analysis of the actual stope geometry, stope wall orientations, …

May 1, 2019 · Stress-induced failure is among the most common causes of instability in Canadian deep underground mines. Open stoping is the most widely practiced un…

Aug 14, 2024 · The results of this research provide a reliable approach to crown pillar design and sub-level open stope stability in deep-seated deposits, which can improve safety and …

The stability of crown pillars can be assessed using the empirical scaled span method, where the scaled crown pillar span (Cs) is compared to the critical span (Sc).

This study employs a finite element approach to investigate the behaviour of crown pillars to various stress and geo-mining parameters. The analysis includes examining stresses, …

The shape of the conceptual transition curve in Figure 1.8 is hyperbolic and indicates that for multiple lift sublevel open stopes (excavations with walls that have high vertical and short …

Nov 8, 2022 · Taking into consideration the deterioration of the quality of deep rock mass, we collect mining data at home and abroad, improve the stability graph, and make it suitable for …

Mar 11, 2023 · The maximum stress induced obtained by the proposed stress curves are compared with those in the literature (Stewart et al. 1995; Vallejos et al. 2018) in order to …

Jul 1, 2024 · In large diameter long-hole (LDL) stopes, ore pillars are often set up in the rock drilling chamber to expand the span. However, after the ore pillars…