Mining Grouting: A Rational Approach

Mining grouting in South Africa has always been associated with deep mines. Certain techniques and equipment used are a result of the very high pressures resulting from the large depths of South African Mines. Some of the techniques specifically developed within the South African mining environment are Precementation of deep shafts up to 2400m; cover grouting to develop or sink under or through rock formations in safety; the successful impermeabilisation of rock masses with `thin, unstable" cement grouts; and the conveyance of cement-sand slurries over many kilometres. This paper presents the development over many years and the State-of-the-Art of South African mining grouting and endeavours to present a more rational evaluation and appreciation of the achievements of the early grouting engineers. It also presents a more rational approach in grouting particularly for mining conditions, keeping in mind recent developments in grouting engineering and possible developments in future.