1. Grobbelaar C. Some properties of rock from deep-level mine of Central Witwatersrand. Assoc Mine Managers South Afr—Pap Discuss; 1958–1960. p. 311–30.
2. Petroscopic observation of rock fracturing ahead of stope faces in deep-level gold mines;Adams;J-South African Instit Min Metall,1980
3. Ultra-deep mining: the increased potential for squeezing conditions;Malan;J-South African Instit Min Metall,1998
4. Time-dependent behaviour of deep level tabular excavations in hard rock;Malan;Rock Mech Rock Eng,1999
5. The stress-strain behaviour of rock material related to fracture under compression;Li;Eng Geol,1998