An effective prototype face support system to minimise rockfalls in rockfall-prone mines was developed and patented during a project sponsored by the Mine Health and Safety Council (MHSC). An experimental development model (XDM) roof support unit was developed ...

The paper describes an R& D programme carried out on Cempak, a proposed stope support system for deep, tabular, hard rock gold and platinum mines; which looks in particular into the issue of convergence after attainment of peak load. Cempak fundamentally ...

Foamed cement packs offer a viable alternative to conventional timber or other forms of packs for permanent underground support. These packs comprise steel mesh and hoop containment with an outer bag for the grout; woven, laminated polypropylene fabric being ...

Considerable practical knowledge and effective use of empirical evidence is required in the design of tunnel support systems. In many instances, it is unclear how individual support elements interact with fractured rock and which elements of the support system ...

The paper presents the actual status of the CANMET-MMSL impact-testing apparatus, and summarizes some results of the testing carried out until now. The energy balance of the system, needed to validate measurements done and test results achieved, will be presented ...

Support design for jointed rock masses can be approached in several ways. When designing support systems for these conditions, the potential block sizes and likelihood of occurrence should be considered. This paper outlines an approach whereby probabilistic ...

<p>Finite Element Analysis (FEA) is used to calibrate a decision-making tool based on an extension of the Mobilized Strength Design (MSD) method which permits the designer an extremely simple method of predicting ground displacements during construction. This ...

<p>This paper describes the methods that can be used to optimize the design of tunnels using a combination of reinforcement and support methods. Particular attention is given to tunnels in very weak rock or soil in which large deformations can occur. Two case ...

An evaluation of the support resistance capacity of a void fill rib based support system was done in a conventional Merensky stoping face at RPM Rustenburg section, Turffontein shaft. The project was a sub component of a larger project evaluating the feasibility ...

The paper describes the history of the Q-system that was introduced in 1974, and its later development. The individual parameters are analysed, and their relevance for the natural geological features they seek to simulate, is discussed. It is concluded that ...