The need for improved layout design criteria for deep tabular stopes
Loading...
Date
Authors
Jooste, Yolande
Malan, D.F. (Daniel Francois)
Journal Title
Journal ISSN
Volume Title
Publisher
Southern African Institute of Mining and Metallurgy
Abstract
This paper was compiled to highlight the need for additional research in the area of layout design criteria
for deep gold mines. It describes aspects related to two popular design criteria used in the deep gold
mines of South Africa, namely average pillar stress (APS) and energy release rate (ERR). The early
layout designs in the gold mines were based on trial and error and most of the recommendations of
the 1924 Witwatersrand Rock Burst Committee are still valid in modern times. The introduction of APS
and ERR assisted greatly to reduce areas of high stress concentrations. Both criteria are of limited use,
however, as it is not clear what the maximum value of APS for remnants should be and ERR has a
significant drawback as no dissipative mechanisms are incorporated to allow for non-violent failure
of the rock mass. A numerical modelling study is described that illustrates the effect of total closure
on the simulated APS and ERR values of remnants. It is recommended that stress measurements be
conducted below remnant areas to better calibrate the numerical models. The need for additional rock
mass monitoring to supplement the design criteria is also discussed.
Description
This paper was first presented
at the Deep Mining 2019
Conference, 24–25 June 2019
Misty Hills Conference Centre,
Muldersdrift, Johannesburg,
South Africa.
This work forms part of a PhD study by Yolande Jooste at the University of Pretoria.
This work forms part of a PhD study by Yolande Jooste at the University of Pretoria.
Keywords
Stope layout, Pillar stress, Energy release rate, Numerical model, Remnants, Layout design criteria, Deep gold mines, South Africa (SA), Average pillar stress (APS), Energy release rate (ERR)
Sustainable Development Goals
SDG-03: Good health and well-being
SDG-04: Quality education
SDG-08: Decent work and economic growth
SDG-09: Industry, innovation and infrastructure
SDG-11: Sustainable cities and communities
SDG-12: Responsible consumption and production
SDG-16: Peace, justice and strong institutions
SDG-04: Quality education
SDG-08: Decent work and economic growth
SDG-09: Industry, innovation and infrastructure
SDG-11: Sustainable cities and communities
SDG-12: Responsible consumption and production
SDG-16: Peace, justice and strong institutions
Citation
Jooste, Y and Malan, D.F.
The need for improved layout
design criteria for deep tabular
stopes.
The Southern African Insitute of
Mining and Metallurgy
DOI ID: http://dx.DOI.org/10.17159/2411-9717/849/2020.