Supplement to the Journal of The South African Institute of Mining and Metallurgy, March 1992 INDEX to the JOURNAL OF THE SOUTH AFRICAN INSTITUTE OF MINING AND METALLURGY VOLUME 91 January~December 1991 SA ISSN 0038-223X PUBLISHED BY THE INSTITUTE, CAPE TOWERS, MACLAREN STREET, JOHANNESBURG THE SOUTH AFRICAN INSTITUTE THE PRESIDENT 1990-1991 OF MINING AND METALLURGY H.G. MOSENTHAL OFFICE BEARERS AND COUNCIL FOR THE 1990/91 SESSION Honorary President T.1. Steenkamp President, Chamber of Mines of South Africa Honorary Vice-Presidents Dr D.J. de Villiers Minister of Mineral and Energy Affairs and Public Enterprises D. Hough Administrator, Transvaal Province L.J. Botha Administrator, Orange Free State Province C.J. van R. Botha Administrator, Natal Province J.W.H. Meiring Administrator, Cape Province PAST PRESIDENTS J.B. Raath Government Mining Engineer “*AW..F . BeCtrteols s(e1 8(94 1— 81—899 1558)9 6 ) **JP..TJ.. MLcoiuinst yrBeo k( 1(914954 4— —1 914964)5 ) *W.R. Feldtmann (1896 — 1897) *M. Falcon (1946 — 1947) President *C. Butters (1897 —1 898) “A. Clemens (1947 — 1948) H.G. Mosenthal *J. Loevy (1898 — 1899) F.G. Hill (1948 — 1949) *J.R. Williams (1899 — 1903) *O.A.E. Jackson (1949 — 1950) President Elect *S.H. Pearce (1903 — 1904) *W.E. Gooday (1950 — 1951) R.D. Beck “W.A. Caldecott (1904 — 1905) *C.J. Irving (1951 — 1952) *W. Cullen (1905 — 1906) *D.D. Stitt (1952 -— 1953) Vice-Presidents *E.H. Johnson (1906 — 1907) *M.C.G. Meyer (1953 — 1954) J.P. Hoffman *J. Yates (1907 — 1908) *L.A. Bushell (1 — 1955) Dr H. Scott-Russell *R.G. Bevington (1908 — 1909) *H. Britten (1955— 1956) “A. McA. Johnston (1909 — 1910) “Wm. Bleloch (1956 — 1957) Immediate Past President *J. Moir (1910 — 1911) “H. Simon (1957 — 1958) Dr O.K.H. Steffen *C.B. Saner (1911 -— 1912) *M. Barcza (1958 — 1959) *W.R. Dowling (1912 — 1913) *R.J. Adamson (1959 — 1960) Honorary Treasurer *A. Richardson (1913 — 1914) “W.S. Findlay (1960 — 1961) Dr H. Wagner *G.H. Stanley (1914 -— 1915) D.G. Maxwell (1961 — 1962) *J.E. Thomas (1915 — 1916) *J. de V. Lambrechts (1962 — 1963) Ordinary Members of Council *J.A. Wilkinson (1916 - 1917) J.F. Reid (1963 — 1964) Dr. N.A. Barcza P.D.K. Robinson *G. Hildick-Smith (1917 - 1918) D.M. Jamieson (1964 — 1965) JG..AA.. CBrruoiswen DP.. A.SJm.i thR oss-Watt **JH.. SG.r aMye y(e1r9 19( 19- 181 9—2 0)1 919) *DH.. E.G oCrrdoosns J(o1ne9s6 5(— 1 916966 6)— 1967) Prof R.J. Dippenaar P.C. van Aswegen * J. Chilton (1920 — 1921) *P. Lambooy (1967 — 1968) Dr G.A. Fourie K.A. van Gessel *F. Wartenweiler (1921 — 1922) R.C.J. Goode (1968 — 1969) JD.rS .B .FKr.e eLro veday DP..J .v avn anS cNhiaeakredrke nburgh **GF..AW.. WWaattesromne y(e1r9 23( 1-9 2129 2—4 )1 923) JV..KC..E .R oDboiungsloans ((11996790 —— 1 1997710)) Dr J. Lurie C.J.C.J. van Vuuren *C.J. Gray (1924 — 1925) D.D. Howat (1971 - 1972) GR..PH.. MPoahrrki ng DP.. MW.Ti.l soWnh ite **HH..AR.. WAhdiatme ((11992256 —- 11992267)) qe. P. .HJ.u gvoan (1R9e7n2s b—u r1g9 73()1 973 - 1974) Prof H.R. Philips *Sir R.N. Kotze (1927 - 1928) . Plewman (1974 — 1975) * J.A. Woodburn (1928 — 1929) . Robinson (1975 — 1976) Branch Chairmen *H. Pirow (1929 - 1930) .G. Salamon (1976 — 1977) Dr C.T. O'Connor, Western Cape Branch * J. Henderson (1930— 1931) Von Wielligh (1977 — 1978) D.R. Fleming, Orange Free State Branch “A. King (1931 — 1932) . Atmore (1978 — 1979) W.J. Abel, Witbank/Middelburg Branch *V. Nimmo-Dewar (1932 — 1933) . Viljoen (1979 — 1980) Prof M.D. Brayshaw, Vaal Triangle Branch *P.N. Lategan (1933 — 1934) . Jochens (1980 — 1981) K.R. Greve, Johannesburg Branch “E.C. Ranson (1934 — 1935) . Nisbet (1981 — 1982) Prof R.F. Sandenbergh, Pretoria Branch “R.A. Flugge-De-Smidt (1935 — 1936) . Brown (1982 — 1983) Dr L.A. Cramer, North-Western Transvaal Branch *T.K. Prentice (1936 — 1937) . King (1983 — 1984) *R.S.G. Stokes (1937 — 1938) . Austin (1984 — 1985) Past Presidents Serving on Council *P.E. Hall (1938 — 1939) . James (1985 — 1986) B.C. Alberts G.Y. Nisbet *E.H.A. Joseph (1939 — 1940) to (1986 — 1987) J.D. Austin Prof R.P. Plewman *J.H. Dobson (1940 — 1941) Alberts (1987 — 1988) Prof A.N. Brown Dr R.E. Robinson *Theo Meyer (1941 — 1942) Fivaz (1988 — 1989) C.E. Fivaz P.W.J. van Rensburg *John V. Muller (1942 — 1943) OeapEOsWrxmH:I.opD TSmnetIe fn Tfe®Sn D (Y19S89O —V v19V90O) TVEDVv: H.E. James Dr H. Wagner *C. Biccard Jeppe (1943 — 1944) Dr P.R. Jochens * Deceased Corresponding Members of Council United Kingdom: Dr M.G. Atmore, Prof C.T. Shaw Honorary Legal Advisers Australasia: |.J. Corrans, R.H. Swan Messrs Van Hulsteyn, Duthie & Saner Canada: Prof B.W. Mackenzie Auditors USA: Dr J-M.M. Rendu, Prof M.D.G. Salamon, Prof R.P. King Messrs Aiken & Peat Far East: B. Hornabrook Chile: Dr E.J. Magri Secretaries New Zealand: A.C. Burrow The South African Institute of Mining and Metallurgy, Brazil: A.G. Netto 13th Floor - Cape Towers, 11-13 McLaren Street, Johannesburg 2001 Telegraphic Address: Perspicax. Council of Mining and Metallurgical Institutions P.O. Box 61127, Marshalltown 2107. Representative: Dr H. Scott-Russell Telephone (011) 834-1273/7, Telex 4-86431, Fax (011) 838-5923. Alternates: Dr M.G. Atmore, Prof D. Buchanan Honorary Editor The Associated Scientific and Technical Societies of South Africa - Dr H.W. Glen Controlling Executive Representatives: H.G. Mosenthal, R.D. Beck This Journal is published with financial assistance from the Alternatives: Dr O.K.H. Steffen, J.P. Hoffman Department of National Education MARCH 1992 Journal of the South African Institute of Mining and Metallurgy CONTENTS Volume 91, 1991 Journal Month No. ] January 2 February August September October November December Journal of the South African Institute of Mining and Metallurgy MARCH 1992 PAPERS AND NOTES IN THE JOURNAL Deformation of stratified rock masses: A laminated model, by M.D.G. Salamon A re-assessment of coal-pillar design, by B.J. Madden Tests on the beneficiation of coal fines, by H.C. Voges Blast-furnace coke: A coal-blending model, by W.H. van Niekerk and R.J. Dippenaar The design of rotary-mill liners, and their backing materials, by M.S. Powell Spotlight on solvent extraction, by W.K. Brinsden Determination of the in situ modulus of the rockmass by the use of backfill measurements, by R.G. Giirtunca and D.J. Adams The use of modified handles on jack-leg drills to reduce hand vibration, by E.M. de Sousa and T.N. Moore A comparison of several kinetic models for the adsorption of gold cyanide onto activated carbon, by J.D. le Roux, A.W. Bryson, and B.D. Young New mine developments—the Navachab Gold Mine, by R.L. Attridge Spotlight on Richards Bay Minerals, by R.J.E. Stewart The physical nature and manufacture of activated carbon, by G.J. McDougall The requirements for engineering education in South Africa, by H.A.D. Kirsten Spotlight on H.J. Joel Mine, by R.L.C. Maggs The propagation of shock waves in a complex tunnel system, by B.W. Skews and R.W. Law Energy changes in a rockmass containing multiple discontinuities, by J.A.L. Napier The regeneration of activated carbon, by B.M. van Vliet Conditioning in the flotation of gold, uranium oxide, and pyrite, by F.J.N. Stassen Spotlight on Iscor’s Corex plant Spotlight on grade control, by W.K. Brinsden The effect of loading history on stress generation due to inelastic deformations around deep-level tabular stopes, by J.S. Kuijpers and J.A.L. Napier The management of carbon in a high-tonnage CIP operation, by R.J. Davidson and N. Schoeman Rib-pillar mining at Sigma Colliery, by J.J.S. de Beer, F. Hunter, and A.F. Neethling Spotlight on mining tax, by M.C. van Blerck Spotlight on industrial minerals, by G.S. Sater Spotlight on corrosion protection by hot-dip galvanizing, by W.G.S. Barnett. vol. 91, no. 7. July 1991. oo... cee ceeeseeseeeeeeseeeaseeceeseseesenses Surface effects of total coal-seam extraction by underground mining methods, by H. Wagner and E.H.R. Schiirmann Spotlight on the design of comminution processes, by B.K. Loveday Zinc in South Africa, by C.J. van Niekerk and C.C. Begley The rationalization of mine and preparation-plant output to enhance the exploitation of coal reserves in South Africa, by P.E. Hand Discussion: An evaluation of yielding timber props as a support system in rockburst conditions, by J.F. Curtis Glossary of corrosion-related terms/Definisies van korrosicverwante begrippe, by/deur R.F. Sandenburgh. Supplement to vol. 91, no. 6. July 1991 Spotlight on environmental impact management at New Vaal Colliery, Orange Free State, by D.A. Salmon, P.D. Tanner, and M. Wills. vol. 91, no. 8. Aug. 1991. The Prieska experience: Flotation developments in copper—zine separation, by B.R. Brockman and D.W. Penman Spotlight on Athel pines growing on slimes dumps, by W.K. Brinsden MARCH 1992 Journal of the South African Institute of Mining and Metallurgy Partial briquetting of coal charges as a means of utilizing lower-grade coal for coke making, by B.J. Pieters Spotlight on Mintek’s ‘Gee Whiz’ Quiz on SATV Experimental and modelling studies of the kinetics in the leaching of pyrolusite, by J.C. Zachariades and D.M. Fraser Discussion: Determination of the in situ modulus of the rockmass, by J.F. Curtis, T.R. Stacey, R.E. Giirtunca, and D.J. Adams Presidential address: The image of the minerals industry, by R.D. Beck Clay and clay minerals in South Africa, by R.O. Heckroodt The open-circuit production of material finer than 75 jum in open-circuit mills, by L.A. Vermeulen, D.D. Howat, and Q.P. Campbell Corrigendum: The Prieska experience: Flotation developments in copper-zinc separation, by B.R. Brockman and D.W. Penman [vol. 91, no. 8, Aug. 1991, pp. 257-265] Discussion: The requirementfso r engineering education in South Africa, by L.J. Besaans, J.F. Curtis, G.W. Annandale, and H.A.D. Kirsten Spotlight on stainless steel in Japan, by I.M.Wolff and M.B. Cortie Non-explosive mining: An untapped potential for the South African gold-mining industry, by H.H. Haase and R.G.B. Pickering ’n Oorsig oor die biologiese behandeling van sianiedbevattende afvalwater, deur J.H. Potgieter The reduction of chromite in liquid iron—chromium-carbon alloys, by E. Uslu and R.H. Eric Spotlight on the South African—German Seminar, by L.B. McRae Discussion: The Prieska experience: Flotation developments in copper-zinc separation, by P.J. Lloyd, B.R. Broekman, and D.W. Penman The use of dynamic simulation in the development of control systems for backfill plants, by W. Stange, M.H. Moys, and A. Hinde A rock-engineering monitoring programme at West Driefontein Gold Mine, by R.G. Giirtunca and D.J. Adams The manufacture of stainless clad steels, by W.A.H. Poppmeier and J.C. Vreugdenburg Spotlight on R&D in chemical engineering at Wits, by R.E. Robinson Journal of the South African Institute of Mining and Metallurgy MARCH 1992 AUTHOR AND SUBJECT INDEX Page A BLELOCH, W.: Obituary Brinsden, W.K. author: Spotlight on Athel pines growing on slimes dumps ACTIVATED carbon see also Gold Extraction author: Spotlight on grade control A comparison of several kinetic models for the adsorption author: Spotlight on solvent extraction of gold cyanide onto activated carbon, by J.D. le Roux, Broekman, B.R. A.W. Bryson, and B.D. Young jt author: The Prieska experience: Flotation developments The management of carbon in a high-tonnage CIP operation, in copper-—zinc separation, by B.R. Broekman and D.W. by R.J. Davidson and N. Schoeman The physical nature and manufacture of activated carbon, jt author: Corrigendum: The Prieska experience: Flotation by G.J. McDougall developments in copper—zinc separation, by B.R. The regeneration of activated carbon, by B.M. van Vliet Broekman and D.W. Penman [vol. 91, no. 8, Aug. 1991, Adams, D.J. pp. 257-265] jt author: Determination of the in situ modulus of the disc: The Prieska experience: Flotation developments in rockmass by the use of backfill measurements, by R.G. copper—zinc separation, by B.R. Broekman and D.W. Giirtunca and D.J. Adams Penman [vol. 91, no. 8, Aug. 1991, pp. 257-265] disc: Determination of the in situ modulus of the rockmass BROEKMAN, B.R. by the use of backfill measurements, by R.G. Giirtunca New Council members (1991/1992) and D.J. Adams [vol. 91, no. 3, Mar.1991, pp. 81-88] Bryson, A.W. jt author: A rock-engineering monitoring programme at jt author: A comparison of several kinetic models for the West Driefontein Gold Mine, by R.G. Giirtunca and D.J. adsorption of gold cyanide onto activated carbon, by J.D. le Roux, A.W. Bryson, and B.D. Young Annandale, G.W. BUSHELL, L.A.: Obituary, by J. Levin disc: The requirements for engineering education in South Africa, by H.A.D. Kirsten [vol. 91, no. 4, Apr. 1991. pp.121-135] Attridge, R.L. author: New mine developments—the Navachab Gold Campbell, Q.P. AWARDS see also SAIMM awards jt author: The open-circuit production of material finer than 75 tm in open-circuit mills, by L.A. Vermeulen, Cullinan Awards D.D. Howat, and Q.P. Campbell Gold Fields National Engineering Awards CARBON -in-pulp see also Activated carbon, Gold extraction Gold medal for Wits metallurgical engineering student .. The management of carbon in a high-tonnage CIP operation, by R.J. Davidson and N. Schoeman CHROMITE reduction The reduction of chromite in liquid iron—chromium—carbon alloys, by E. Uslu and R.H. Eric BACKFILLING CLAY and clay minerals Determination of the in situ modulus of the rockmass by Clay and clay minerals in South Africa, by R.O. Heckroodt the use of backfill measurements, by R.G. Giirtunca and D.J. Adams COAL and coke Blast-furnace coke: A coal-blending model, by W.H. van The use of dynamic simulation in the development of control Niekerk and R.J. Dippenaar systems for backfill plants, by W. Stange, M.H. Moys, and A. Hinde Partial briquetting of coal charges as a means of utilizing Bamett, W.G.S. lower-grade coal for coke making, by B.J. Pieters author: Spotlight on corrosion protection by hot-dip gal- Tests on the beneficiation of coal fines, by H.C. Voges vanizing. vol. 91, no. 7. July 1991 COAL mining and preparation Beck, R.D. The rationalization of mine and preparation-plant output author: Presidential address: The image of the minerals to enhance the exploitation of coal reserves in South industry Africa, by P.E. Hand author: President’s page: Challenges A re-assessment of coal-pillar design, by B.J. Madden author: President’s page: Students Rib-pillar mining at Sigma Colliery, by J.J.S. de Beer, F. Begley, C.C. Hunter, and A.F. Neethling jt author: Zinc in South Africa, by C.J. van Niekerk and C.C. Begley Surface effects of total coal-seam extraction by underground mining methods, by H. Wagner and E.H.R. Schiirmann BENEFICIATION Tests on the beneficiation of coal fines, by H.C. Voges COMMINUTION see Milling Besaans, L.J. CONTROL systems disc: The requirements for enginecring education in South The use of dynamic simulation in the development of Africa, by H.A.D. Kirsten [vol. 91, no. 4, Apr. 1991, control systems for backfill plants, by W. Stange, M.H. pp.121-135] Moys, and A. Hinde MARCH 1992 Journal of the South African Institute of Mining and Metallurgy CORROSION Spotlight on environmental impact management at New Glossary of corrosion-related terms/Definisies van korro- Vaal Colliery, Orange Free State, by D.A. Salmon, sieverwante begrippe, by/deur R.F. Sandenburgh. P.D. Tanner, and M. Wills. vol. 91, no. 8. Aug. 1991 Supplement to vol. 91, no. 6. July 1991 Eric, R.H. CORROSION protection jt author: The reduction of chromite in liquid iron- chromium-carbon alloys, by E. Uslu and R.H. Eric.... Spotlight on corrosion protection by hot-dip erate by W.G.S. Barnett. vol. 91, no. 7. July 1991 . Cortie, M.B. F jt author: Spotlight on stainless steel in Japan, by I.M. Wolff and M.B. Cortie FLEETWOOD, B.R. Curtis, J.F. New Council members [1991/1992] disc: Determination of the in situ modulus of the rockmass FLOTATION by the use of backfill measurements, by R.G. Giirtunca Conditioning in the flotation of gold, uranium oxide, and and D.J. Adams [vol. 91, no. 3, Mar. 1991, pp. 81-88] .. pyrite, by F.J.N. Stassen disc: An evaluation of yielding timber props as a support system in rockburst conditions, by M.K.C. Roberts [vol. The Prieska experience: Flotation developments in copper— 1, no. 1, Jan. 1991, pp. 1-7] zinc separation, by B.R. Broekman and D.W. Penman disc: The requirements for engineering education in South Corrigendum: The Prieska experience: Flotation develop- Africa, by H.A.D. Kirsten [vol. 91, no. 4, Apr. 1991. ments in copper—zinc separation, by B.R. Broekman and pp.121-135] D.W. Penman [vol. 91, no. 8, Aug. 1991, pp. 257-265] disc: The Prieska experience: Flotation developments in copper—zinc separation, by B.R. Broekman and D.W. Penman [vol. 91, no. 8, Aug. 1991, pp. 257-265] B.R. Broekman and D.W. Penman Davidson, R.J. P.J. Lloyd jt author: The management of carbon in a high-tonnage Fraser, D.M. CIP operation, by R.J. Davidson and N. Schoeman .... jt author: Experimental and modelling studies of the De Beer, J.J.S. kinetics in the leaching of pyrolusite jt author: Rib-pillar mining at Sigma Colliery, by J.J.S. de Beer, F. Hunter, and A.F. Neethling G De Sousa, E.M. jt author: The use of modified handles on jack-leg drills GOLD extraction to reduce hand vibration, by E.M. de Sousa and T.N. Moore A comparison of several kinetic models for the adsorption of gold cyanide onto activated carbon, by J.D. le Roux, Dippenaar, R.J. A.W. Bryson, and B.D. Young jt author: Blast-furnace coke: A coal-blending model, by W.H. van Niekerk and R.J. Dippenaar Conditioning in the flotation of gold, uranium oxide, and pyrite, by F.J.N. Stassen DRILLING The management of carbon in a high-tonnage CIP oper- The use of modified handles on jack-leg drills to reduce ation, by R.J. Davidson and N. Schoeman hand vibration, by E.M. de Sousa and T.N. Moore GOLD mines New mine developments—the Navachab Gold Mine, by R.L. Attridge Spotlight on H.J. Joel Mine, by R.L.C. Maggs ECONOMICS GOLD mining see Mining technology GRADE control Spotlight on mining tax, by M.C. van Blerck Spotlight on grade control, by W.K. Brinsden ENGINEERING education Giirtunca, R.G. The requirements for engineering education in South Africa, jt author: Determination of the in situ: modulus of the by H.A.D. Kirsten rockmass by the use of backfill measurements, by R.G. disc: The requirements for engineering education in South Giirtunca and D.J. Adams Africa disc: Determination of the in situ modulus of the rockmass G.W. Annandale 376 by the use of backfill measurements, by R.G. Giirtunca L.J. Besaans 373 and D.J. Adams [vol. 91, no. 3, Mar.1991, pp. 81-88] .. J.F. Curtis jt author: A rock-engineering monitoring programme at H.A.D. Kirsten West Driefontein Gold Mine, by R.G. Giirtunca and Spotlight on R&D in chemicai engineering at Wits, by R.E. Robinson ENVIRONMENT ’n Oorsig oor die biologiese behandcling van sianiedbe- Haase, H.H. vattende afvalwater, deur J.H. Potgieter jt author: Non-explosive mining: An untapped potential Spotlight on Athel pines growing on slimes dumps, by for the South African gold-mining industry, by H.H. W.K. Brinsden Haase and R.G.B. Pickering Journal of the South African Institute of Mining and Metallurgy MARCH 1992 Hand, P.E. Levin, J. author: The rationalization of mine and preparation-plant author: Obituary: Dr Laurence Allison Bushell output to enhance the exploitation of coal reserves in Lloyd, P.J. South Africa disc: The Prieska experience: Flotation developments in Heckroodt, R.O. copper—zinc separation, by B.R. Broekman and D.W. author: Clay and clay minerals in South Africa Penman [vol. 91, no. 8, Aug. 1991, pp. 257-265] Hinde, A. Loveday, B.K. jt author: The use of dynamic simulation in the dev- author: Spotlight on the design of comminution processes elopment of control systems for backfill plants, by W. Stange, M.H. Moys, and A. Hinde Howat, D.D. Madden, M.J. jt author: The open-circuit production of material finer author: A re-assessment of coal-pillar design than 75 tum in open-circuit mills, by L.A. Vermeulen, Maggs, R.C.L. D.D. Howat, and Q.P. Campbell author: Spotlight on H.J. Joel Mine Hunter, F. McDougall, G.J. jt author: Rib-pillar mining at Sigma Colliery, by J.J.S. author: The physical nature and manufacture of activated de Beer, F. Hunter, and A.F. Neethling McRae, L.B. author: Spotlight on the South African—German Seminar METAL and mineral review series INDUSTRIAL minerals Zinc in South Africa, by C.J. van Niekerk and C.C. Begley Clay and clay minerals in South Africa, by R.O. MILLING II cer Accs ne tunis tecadcacdatentaitdescdleecicsorwsencsasiowete The design of rotary-mill liners, and their backing materials, Spotlight on industrial minerals, by G.S. Sater by MLS. Powell Spotlight on Richards Bay Minerals, by R.J.E. Stewart ... The open-circuit production of material finer than 75 um IRONMAKING in open-circuit mills, by L.A. Vermeulen, D.D. Howat, Spotlight on Iscor’s Corex plant and Q.P. Campbell Spotlight on the design of comminution processes, by B.K. J MINERAL SANDS JANISCH, P.R. Spotlight on Richards Bay Minerals, by R.J.E. Stewart .... New Council members [1991/1992] MINING technology Non-explosive mining: An untapped potential for the South K African gold-mining industry, by H.H. Haase and R.G.B. Pickering Kirsten, H.A.D. MODELLING author: The requirements for engineering education in Blast-furnace coke: A coal-blending model, by W.H. van South Africa Niekerk and R.J. Dippenaar disc: The requirements for engineering education in South A comparison of several kinetic models for the adsorption Africa, by H.A.D. Kirsten [vol. 91, no. 4, Apr. 1991. of gold cyanide onto activated carbon, by J.D. le Roux, pp.121-135] A.W. Bryson, and B.D. Young KNOTTENBELT, P.J. Deformation of stratified rock masses: A laminated model, New Council members [1991/1992] by M.D.G. Salamon KRUGER, P. du P. Energy changes in a rockmass containing multiple dis- Brigadier Stokes Memorial Award continuities, by J.A.L. Napier Kuijpers, J.S. Experimental and modelling studies of the kinetics in the jt author: The effect of loading history on stress gen- leaching of pyrolusite, by J.C. Zachariades and D.M. eration due to inelastic deformations around deep-level Fraser tabular stopes, by J.S. Kuijpers and J.A L. Napier The propagation of shock waves in a complex tunnel system, by B.W. Skews and R.W. Law L The use of dynamic simulation in the development of control systems for backfill plants, by W. Stange, M.H. Law, R.W. Moys, and A. Hinde jt author: The propagation of shock waves in a complex Moore, T.N. tunnel system, by B.W. Skews and R.W. Law jt author: The use of modified handles on jack-leg drills LEACHING to reduce hand vibration, by E.M. de Sousa and T.N. Experimental and modelling studies of the kinetics in the Moore leaching of pyrolusite, by J.C. Zachariades and D.M. Mosenthal, H.G. Fraser author: President’s Page: The changing scene Le Roux, J.D. Moys, M.H. jt author: A comparison of several kinetic models for the jt author: The use of dynamic simulation in the develop- adsorption of gold cyanide onto activated carbon, by ment of control systems for backfill plants, by W. Stange, J.D. le Roux, A.W. Bryson, and B.D. Young M.H. Moys, and A. Hinde MARCH 1992 Journal of the South African Institute of Mining and Metallurgy Page disc: An evaluation of yielding timber props as a support system in rockburst conditions, by M.K.C. Roberts [vol. 1, no. 1, Jan. 1991, pp. 1-7] Napier, J.A.L. ROBINSON, P.D.K. author: Energy changes in a rockmass containing multiple New Council member [1991/1992] discontinuities jt author: The effect of loading history on stress generation Robinson, R.E. due to inelastic deformations around deep-level tabular author: Spotlight on R&D in chemical engineering at stopes, by J.S. Kuijpers and J.A.L. Napier Wits .. : Neethling, A.F. ROCK mechanics jt author: Rib-pillar mining at Sigma Colliery, by J.J.S. Deformation of stratified rock masses: A laminated model, de Beer, F. Hunter, and A.F. Neethling by M.D.G. Salamon Determination of the in situ modulus of the rockmass by the use of backfill measurements, by R.G. Giirtunca and D.J. Adams me : disc: Determination of the in situ modulus of the rockmass OBITUARY by the use of backfill measurements, by R.G. Giirtunca W. Bleloch and D.J. Adams [vol. 91, no. 3, Mar. 1991, pp. 81-88]. Dr Laurence Allison Bushell, by J. Levin D.J. Adams and R.G Giirtunca O’CONNOR, C.T. J.F. Curtis T.R. Stacey New Council members [1991/1992] An evaluation of yielding timber props as a support OWEN, K.C. system in rockburst conditions, by M.K.C. Roberts .... New Council members [1991/1992] disc: An evaluation of yielding timber props as a support system in rockburst conditions, by M.K.C. Roberts {[vol. 1, no. 1, Jan. 1991, pp. 1-7] P M.K.C. Roberts Penman, D.W. jt author: The Prieska experience: Flotation developments The effect of loading history on stress generation due in copper—zinc separation, by B.R. Broekman and D.W. to inelastic deformations around deep-level tabular Penman stopes, by J.S. Kuijpers and J.A.L. Napier jt author: Corrigendum: The Prieska experience: Flotation Energy changes in a rockmass containing multiple dis- developments in copper—zinc separation, by B.R. continuities, by J.A.L. Napier Broekman and D.W. Penman [vol. 91, no. 8, Aug. 1991, pp. 257-265] A rock-engineering monitoring programme at West disc: The Prieska experience: Flotation developments in Driefontein Gold Mine, by R.G. Giirtunca and D.J. copper—zinc separation, by B.R. Broekman and D.W. Penman [vol. 91, no. 8, Aug. 1991, pp. 257-265] Pickering, R.G.B. jt author: Non-explosive mining: An untapped potential for the South African gold-mining industry, by H.H. SAIMM annual report Haase and R.G.B. Pickering Annual report and accounts [1990/1991] Pieters, B.J. SAIMM awards author: Partial briquetting of coal charges as a means of utilizing lower-grade coal for coke making Brigadier Stokes Memorial Award to P. du P. Kruger ... Poppmeier, W.A.H. Certificate to R.R. Manowski jt author: The manufacture of stainless clad steels, by Fifty-year membership award to P.W.J. van Rensburg .. W.A.H. Poppmeier and J.C. Vreugdenburg Gold Medals to R.P. King and W.W. Stange Potgieter, J.H. author: ’n Oorsig oor die biologiese behandeling van Honorary life fellowship to H. Wagner sianiedbevattende afvalwater Silver Medals to H.A.D. Kirsten, M.D.G. Salamon, and Powell, M.S. W.H. van Niekerk and R.J. Dippenaar author: The design of rotary-mill liners, and their backing Student Prizes to J.P. Botha, J.J.L. du Plessis, J.R. de Wet, materials P.J.L. Fernandes, A.C. van Niekerk, and P.J. Lewame PRESIDENT’S page SAIMM branches The changing scene, by H.G. Mosenthal Annual report Challenges, by R.D. Beck SAIMM meetings Students, by R.D. Beck Annual general meeting (94th), 14th August, 1991 PYRITE recovery SAIMM new Council members [1990/1991] Conditioning in the flotation of gold, uranium oxide, and pyrite, by F.J.N. Stassen C.T. O’Connor, P. Smith, P.D.K. Robinson SAIMM new Council members [1991/1992] K.C. Owen, B.R. Broekman, P.J. Knottenbelt, P.R. Janisch, B.R. Fleetwood Roberts, M.K.C. SAIMM President’s Page author: An evaluation of yielding timber props as a support system in rockburst conditions Challenges, by R.D. Beck Journal of the South African Institute of Mining and Metallurgy MARCH 1992 The changing scene, by H.G. Mosenthal Stassen, F.J.N. Students, by R.D. Beck author: Conditioning in the flotation of gold, uranium oxide, and pyrite Salamon, M.G.D. author: Deformation of stratified rock masses: A laminated STEEL Spotlight on stainless steel in Japan, by I.M. Wolff and Salmon, D.A. M.B. Cortie jt author: Spotlight on environmental impact management STEEL manufacture at New Vaal Colliery, Orange Free State, by D.A. The manufacture of stainless clad steels, by W.A.H. Salmon, P.D. Tanner, and M. Wills. vol. 91, no. 8. Aug. Poppmeier and J.C. Vreugdenburg Stewart, R.J.E. Sandenburgh, R.F. author: Spotlight on Richards Bay Minerals author: Glossary of corrosion-related terms/Definisies van SUBSIDENCE engineering korrosieverwante begrippe. Supplement to vol. 91, no. 6. July 1991 Surface effects of total coal-seam extraction by under- ground mining methods, by H. Wagner and E.H.R. Sater, G.S. Schiirmann author: Spotlight on industrial minerals Schoeman, N. jt author: The management of carbon in a high-tonnage CIP operation, by R.J. Davidson and N. Schoeman Schiirmann, E.H.R. Tanner, P.D. jt author: Surface effects of total coal-seam extraction jt author: Spotlight on environmental impact manage- by underground mining methods, by H. Wagner and ment at New Vaal Colliery, Orange Free State, by D.A. E.H.R. Schiirmann Salmon, P.D. Tanner, and M. Wills. vol. 91, no. 8. Aug. Skews, B.W. jt author: The propagation of shock waves in a complex tunnel system, by B.W. Skews and R.W. Law ............ SMITH, P. New Council members [1991/1992] SOLVENT extraction URANIUM recovery Spotlight on solvent extraction, by W.K. Brinsden Conditioning in the flotation of gold, uranium oxide, and SPOTLIGHT series pyrite, by F.J.N. Stassen Uslu, E. Spotlight on Athel pines growing on slimes dumps, by jt author: The reduction of chromite in liquid iron— W.K. Brinsden chromium-carbon alloys, by E. Uslu and R.H. Eric ... Spotlight on corrosion protection by hot-dip galvanizing, by W.G.S. Barnett. vol. 91, no. 7. July 1991 Spotlight on the design of comminution processes, by V B.K. Loveday Spotlight on environmental impact management at New Van Blerck, M.C. Vaal Colliery, Orange Free State, by D.A. Salmon, P.D. author: Spotlight on mining tax Tanner, and M. Wills. vol. 91, no. 8. Aug. 1991 Van Niekerk, C.J. Spotlight on grade control, by W.K. Brinsden jt author: Zinc in South Africa, by C.J. van Niekerk and Spotlight on H.J. Joel Mine, by R.L.C. Maggs ............... C.C. Begley Spotlight on industrial minerals, by G.S. Sater Van Niekerk, W.H. Spotlight on Iscor’s Corex plant jt author: Blast-furnace coke: A coal-blending model, by W.H. van Niekerk and R.J. Dippenaar Spotlight on mining tax, by M.C. van Blerck Van Vliet, B.M. Spotlight on Mintek’s “Gee Whiz’ Quiz on SATV author: The regeneration of activated carbon Spotlight on R&D in chemical enginecring at Wits, by R.E. Robinson Vermeulen, L.A. jt author: The open-circuit production of material finer Spotlight on Richards Bay Minerals, by R.J.E. Stewart .. than 75 um in open-circuit mills, by L.A. Vermeulen, Spotlight on solvent extraction, by W.K. Brinsden D.D. Howat, and Q.P. Campbell Spotlight on the South African—German Seminar, by Voges, H.C. L.B. McRae author: Tests on the beneficiation of coal fines Spotlight on stainless stecl in Japan, by 1.M. Wolff and Vreugdenburg, J.C. M.B. Cortie jt author: The manufacture of stainless clad steels, by Stacey, T.R. W.A.H. Poppmeier and J.C. Vreugdenburg disc: Determination of the in situ modulus of the rock- mass by the use of backfill measurements, by R.G. Giirtunca and D.J. Adams [vol. 91, no. 3, Mar. 1991, WwW Stange, W. Wagner, H. jt author: The use of dynamic simulation in the develop- jt author: Surface effects of total coal-seam extraction ment of control systems for backfill plants, by W. by underground mining methods, by H. Wagner and Stange, M.H. Moys, and A. Hinde E.H.R. Schiirmann 10 MARCH 1992 Journal of the South African Institute of Mining and Metallurgy