Rock related fatalities and injuries are still reported at an alarming rate in South Africa's
deep to ultra-deep level (1500 m to 4500 m from earth surface) hard rock mining/tunneling …

A simple empirical time-dependent chart of extension fracture initiation is described. The
chart was developed using simple borehole periscope observations within the rib pillars …

Historically, the design of the in-stope pillar in underground excavations has been based on
empirical formulae and numerical modelling. Although these design methods have been …

This short note outlines the performance of the welded mesh under static loading, as well as
the breaking strength of mesh strands. A welded mesh with the configuration of 5.6-mm …

Face perpendicular preconditioning is one of the mechanisms used in deep gold mines to
transfer stress far ahead of the face on the development ends. Although face perpendicular …

The deep level gold mine has a very thick orebody at a depth of 3000m. In order to apply
massive mining techniques, de-stressing is imperative. De-stressing is accomplished by …

In order to determine the dynamic capability of a Garford hybrid bolt, static and dynamic tests
were performed at the Videx Mining facility in South Africa. Two hydraulic rams with a …

Most of South African mechanized and semi-mechanized gold mines in the Witwatersrand
basin are operating at depths ranging from 2.7–3 km below the earth surface. Before a …

According to the annual accident statistics released by the Department of Mineral Resources
(DMR) in South Africa, a significant percentage of fatalities in South African Gold Mines …

The performance of the yielding pillar in a deep level gold mine has been evaluated using
Ground Penetrating Radar, Borehole periscope, and Abaqus Explicit numerical modeling …