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Cut and fill mining as practised in the USA — An overview
80A
preplaced reinforcement. Discusses these topics in relation to a ~mmber of cut-arC-fill mines in Australia. 3~ refs. 82~062 REVIEW OF FILL MINING TECHNOLOGY IN CANAD~ Sit,h, K H; Hedley, D G F Proc Conference on the Application of Rock Mechanics to Cut and Fill ~ining, Lulea, 1-3 Ju~e 1980, PII-2~. Publ London: I~, 1981 Reviews the evolution of the technique in Carada and discusses the role of fill as regio~l suplx~t, pillar suppc~t~ fill roar, working flock, dilution control, and waste disposal: also discusses fill l~operties~ in-situ meaa~rmments, post-pillar mining, new d~velopments. 35 refs. 824063 CUT AND FILL MINING AS PRACTISED IN THE USA AN OVENVIEW Gooch, A E Proc Conference on the Application of Rock Mechanics to Cut and Fill Miring, Lulea, 1-3 June 1980, P25-27. Pt~l Londom: IF~, 1981 Very briefly reviews the method and its importance and extent in the USA, amd the specific I~Oblems of ground control, mechamis~tlon and ventilation. US Bureau of Mines research inwolves denaification, dewatering and physical properties of fill, finite el~ment analysis, in situ stress measurement, instrumentation system design, contira~o~ li~ing systems, im~ovod rockboltlr~ systems ar~ replacement materials far timber (the research topics are not d i s u s e d in the paper)0 The future is projected briefly. 82406~ ROCK MECHANICS AND THE ECONOMICS OF Cb~ AND FILL MINING ~en, G Proc Conference on the Application of Rock Mechanics to Cut and Fill Mindng, Lulea, 1-3 June 1980, P28-35. Fubl London: I~, 1981 Discusses the economic aspects of loss of ore~ rock dilution, mechanisation levels amd rock support, the latter (including bolts and shotcrete) considered to be of least economic importance° 82~o65 ROCK ~CHANICS RESEARCH IN THE COEUR D'ALENE MINING DISTRICT Cc~p, E L Proc Conference on the Application of Rock Mechanics to Cut and Fill Mindng~ Lulea, 1-3 June 1980, I~O-KS. Publ London: D@4, 1981 Describes work on stress fields, ah~ft design (fir.~te element modelling and excavation of test shafts) and rock burst control (by destressing and microseismic mor~tc~ir~) for the C ~ d'Alene mining district, Idaho, USA, where mining takes place at depths of up to 8000ft in h~-~, brittle quartzite capable of comcentrati~g high levels of stress, with ~neq~l horizontal streues and major faults, Joints and beddir~ planes. 824066 ROCK MECHANICS TOPICS IN CUT AND FILL MINING OF VEINS OF VARYING DIP Carta, M; Cotza; R; Gituliani, S Proc Conference on the Application of Rock Mechanics to Cut and Fill Mindng~ Lulea, 1-3 Jum~ 1980, I~9-~. Ptf~l London: IMM, 1981 Reviews the rock mechanics aspects of cut a ~ fill mining ard rel~rts an i~ves~i~a%iOn in 3 Italian mines where vein-shape~ erebodies of differlr~
dip~ width, mln~allsation and rock mechanical properties are exploi%ed. Proposed methods are discUssed with reference to safety, productivlty, and recovery. 824067 MECHANICS OF GROUND FRACI~JRING AT CON GOLD MINE, CANADA J~emic, M; Cassidy, K Prec Conference on the Application of Rock Mechanics to Cut and Fill Minir~, Lulea, 1-3 June 1980, F6~-71. Publ London: IMM, 1981 Discusses tectonic stresses ar~ shear zones arisir~ from the orogenic l~cocesses in the Yellcwknife Greenstone Belt and h ~ these interact with m i n i ~ Ir~Qced stresses to produce different modes of ~ failure - loadlr~ fracture at har~i~wall, unloading fracture at footwalI, dead-iced fracture at back, loadir~ fracture at carners of ope~ir~s° Discusses grotuxl reinforcement by Bolts, cable bolts, backfill and charged stope layout. 824068 FEASIBILITY OF HORIZONTAL AND INCLIneD SLICING OF THICK COAL SEAMS IN C O N ~ I O N WITH HYDRAULIC FILL~7~G Sit,h, T N; Sir~,, R O Proc Comfe~ence on the Application of Rock Mechmnics to Cut and Fill Mining, Lulea, 1-3 June 1980, F72-78. Publ London: IMM, 1981 Reports model studies of various slicir~ methods at the Sudamdih mine in the Jharla coalfield, Italia. 82hO69 GEOMECHANICAL INVE~IGATIONS FOR THE DESIGN OF C ENENFED FILL Berry, P Proc Conference on the Application of Rock Mechandcs to Cut and Fill Mining, L~lea, 1-3 June 1980, P79-92. l%/bl London: IMM, 1981 Reports lab and field investigations for the Gav~'ranO p~rite mir~, Tuscan, Italy. Lab tests showed that the physical and mechanical properties are highly variable, that the stre~g+~h depends on the cement content ard on the porosity a c c ~ i r ~ to a power law. In situ convergence and load measurements showed the importance of vertical ar~ horizontal discontinuities of the fill. Results were used to modify the minir~ pattern and increase output. 82~070 IMPROVING THE SUPPORT CHARACTERISTICs OF HYDRAULIC FILL Corson, D R; Dcennan, K R; Slz~te, R H Proc Conference on the Application of Rock Mechanics to Cut ar~ Fill Mining, Lulea, I-3 June 1980, P93-99. Publ London: ~ , 1981 Reviews US Bureau of Mines research in the following areas: Percolation rate, support capability, field evaluation, hi~h-modulus fill, fill dewatering. 824071 DESIGN PARAM~'I'~S USED AND BACKFILL MATERIALs SELE~-I~D FOR A NEW BAS~-MET~L MINE IN THE R~J~LIC OF SCK~I~ AFRICA de Jo~h, C L Proc Conference on the Application of Rock Mechar~cs to Cut and Fill Minir~, Lulea, 1-3 June 1980, PI00-106. Publ London: IMM, 1981 Describes the location and geology and the mining methOds employ~l at the Black Mountain mine. Discusses the pillar spacing and design, lab tests
preplaced reinforcement. Discusses these topics in relation to a ~mmber of cut-arC-fill mines in Australia. 3~ refs. 82~062 REVIEW OF FILL MINING TECHNOLOGY IN CANAD~ Sit,h, K H; Hedley, D G F Proc Conference on the Application of Rock Mechanics to Cut and Fill ~ining, Lulea, 1-3 Ju~e 1980, PII-2~. Publ London: I~, 1981 Reviews the evolution of the technique in Carada and discusses the role of fill as regio~l suplx~t, pillar suppc~t~ fill roar, working flock, dilution control, and waste disposal: also discusses fill l~operties~ in-situ meaa~rmments, post-pillar mining, new d~velopments. 35 refs. 824063 CUT AND FILL MINING AS PRACTISED IN THE USA AN OVENVIEW Gooch, A E Proc Conference on the Application of Rock Mechanics to Cut and Fill Miring, Lulea, 1-3 June 1980, P25-27. Pt~l Londom: IF~, 1981 Very briefly reviews the method and its importance and extent in the USA, amd the specific I~Oblems of ground control, mechamis~tlon and ventilation. US Bureau of Mines research inwolves denaification, dewatering and physical properties of fill, finite el~ment analysis, in situ stress measurement, instrumentation system design, contira~o~ li~ing systems, im~ovod rockboltlr~ systems ar~ replacement materials far timber (the research topics are not d i s u s e d in the paper)0 The future is projected briefly. 82406~ ROCK MECHANICS AND THE ECONOMICS OF Cb~ AND FILL MINING ~en, G Proc Conference on the Application of Rock Mechanics to Cut and Fill Mindng, Lulea, 1-3 June 1980, P28-35. Fubl London: I~, 1981 Discusses the economic aspects of loss of ore~ rock dilution, mechanisation levels amd rock support, the latter (including bolts and shotcrete) considered to be of least economic importance° 82~o65 ROCK ~CHANICS RESEARCH IN THE COEUR D'ALENE MINING DISTRICT Cc~p, E L Proc Conference on the Application of Rock Mechanics to Cut and Fill Mindng~ Lulea, 1-3 June 1980, I~O-KS. Publ London: D@4, 1981 Describes work on stress fields, ah~ft design (fir.~te element modelling and excavation of test shafts) and rock burst control (by destressing and microseismic mor~tc~ir~) for the C ~ d'Alene mining district, Idaho, USA, where mining takes place at depths of up to 8000ft in h~-~, brittle quartzite capable of comcentrati~g high levels of stress, with ~neq~l horizontal streues and major faults, Joints and beddir~ planes. 824066 ROCK MECHANICS TOPICS IN CUT AND FILL MINING OF VEINS OF VARYING DIP Carta, M; Cotza; R; Gituliani, S Proc Conference on the Application of Rock Mechanics to Cut and Fill Mindng~ Lulea, 1-3 Jum~ 1980, I~9-~. Ptf~l London: IMM, 1981 Reviews the rock mechanics aspects of cut a ~ fill mining ard rel~rts an i~ves~i~a%iOn in 3 Italian mines where vein-shape~ erebodies of differlr~
dip~ width, mln~allsation and rock mechanical properties are exploi%ed. Proposed methods are discUssed with reference to safety, productivlty, and recovery. 824067 MECHANICS OF GROUND FRACI~JRING AT CON GOLD MINE, CANADA J~emic, M; Cassidy, K Prec Conference on the Application of Rock Mechanics to Cut and Fill Minir~, Lulea, 1-3 June 1980, F6~-71. Publ London: IMM, 1981 Discusses tectonic stresses ar~ shear zones arisir~ from the orogenic l~cocesses in the Yellcwknife Greenstone Belt and h ~ these interact with m i n i ~ Ir~Qced stresses to produce different modes of ~ failure - loadlr~ fracture at har~i~wall, unloading fracture at footwalI, dead-iced fracture at back, loadir~ fracture at carners of ope~ir~s° Discusses grotuxl reinforcement by Bolts, cable bolts, backfill and charged stope layout. 824068 FEASIBILITY OF HORIZONTAL AND INCLIneD SLICING OF THICK COAL SEAMS IN C O N ~ I O N WITH HYDRAULIC FILL~7~G Sit,h, T N; Sir~,, R O Proc Comfe~ence on the Application of Rock Mechmnics to Cut and Fill Mining, Lulea, 1-3 June 1980, F72-78. Publ London: IMM, 1981 Reports model studies of various slicir~ methods at the Sudamdih mine in the Jharla coalfield, Italia. 82hO69 GEOMECHANICAL INVE~IGATIONS FOR THE DESIGN OF C ENENFED FILL Berry, P Proc Conference on the Application of Rock Mechandcs to Cut and Fill Mining, L~lea, 1-3 June 1980, P79-92. l%/bl London: IMM, 1981 Reports lab and field investigations for the Gav~'ranO p~rite mir~, Tuscan, Italy. Lab tests showed that the physical and mechanical properties are highly variable, that the stre~g+~h depends on the cement content ard on the porosity a c c ~ i r ~ to a power law. In situ convergence and load measurements showed the importance of vertical ar~ horizontal discontinuities of the fill. Results were used to modify the minir~ pattern and increase output. 82~070 IMPROVING THE SUPPORT CHARACTERISTICs OF HYDRAULIC FILL Corson, D R; Dcennan, K R; Slz~te, R H Proc Conference on the Application of Rock Mechanics to Cut ar~ Fill Mining, Lulea, I-3 June 1980, P93-99. Publ London: ~ , 1981 Reviews US Bureau of Mines research in the following areas: Percolation rate, support capability, field evaluation, hi~h-modulus fill, fill dewatering. 824071 DESIGN PARAM~'I'~S USED AND BACKFILL MATERIALs SELE~-I~D FOR A NEW BAS~-MET~L MINE IN THE R~J~LIC OF SCK~I~ AFRICA de Jo~h, C L Proc Conference on the Application of Rock Mechar~cs to Cut and Fill Minir~, Lulea, 1-3 June 1980, PI00-106. Publ London: IMM, 1981 Describes the location and geology and the mining methOds employ~l at the Black Mountain mine. Discusses the pillar spacing and design, lab tests