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Comminution by the attrition grinding process
129A
Blasting See also: 816177 816180 ENGINEERING ASPECTS OF UNDERGEOUND CAVERN EXCAVATION AT DINOEWIC - PART 3. A S~JDY OF BLAST VIBRATIONS, PART 1 Isaac, I D; Bubb, C Tunn Turmlg, V24, N6, July 1981, P35-41 First describes the envirommental considerations which influenced the design of the drilling and blasting patterns and how measurements were made at Dinc~wic. Discusses the criteria asst~ed far establishing ground v i b r a t i o n t ~ s m e t e T s amd how the monitored results were used to design a~i control blasts. Results a r e compared with recent work carried out in Scandinavia. 816181 E ? ~ G I ~ I N G ASPECTS OF UND~RGROUED C A V ~ EXCAVATION AT DINOEWIC - PART 2. DRYTfTNG AND BLASTING Isaac, I D; Bubb, C Tunn Tunmlg, VI3, NS, June 1981, F19-21 The general principles uf drilling amd blasting urdergrouni caverns at Dinorwic are described, shcwing how the varying techniques were adapted to meet local conditions. Typical blast patterns are illustrated, showing how they were adapted for blasting heavily Jointed rock. The influence on drilling and charging patterns of the plant used is also discussed. 816182 SPHERICAL CE~RGE CRATERING - FLANE AND ANGLE GEOMETRY INVOLVING SM~IL-SCALE ANGLE AND ROW TESTS MacLachlan, R R; Salrmm, D E; Barclay~ R J CIM Bull, V74, N829, May 1981, P81-85 The ~est objectives were: (i) to observe the c h a ~ e in single-charge cratering perfc~,,a~e between plane-surface and angle geometry, (2) to ideztify the optimum perfcm~ance of single charges cratering to a plane surface, craterimg from a bench sub-grade position and cratering from a condition of zero sub-grade or stope wall geometry, and (3) to observe the performamce of row-of-charges craterizg to an angular surface at various row burials and spacing. The row charge burial and spacing dimensions were to be expressed in simple ~merical multiples of single-charge depth-of-burial data. 816183 SWEDISH CAUTIOUS BLAST EXCAVATION AT TEE C S ~ 0NVI TEST SITE IN COLORADO Holmberg, R; HusTAnllid, W Swedish Detonic Research Foundation, Report DS 1981:1, 16 Feb 19@1, ZIP Describes the excavation of a test roam at the Colorado School of Mines Experimental Mine in Idaho Springs, Colorado, utillslng the techniques of Presplitting ani smooth blasting. Avail: The Foundation, Box 32058, S-126 ll, Stockholm, Sweden 816181~ NUMERICAL INVESTIGATION OF A METHOD FOR STRESS WAVE M E A ~ IN ROCK Cooper, T; BJarmholt, G Swedish Detonlc Research Foundation~ Report DS 1981:2, 7 AprCI 1981, 16P
An alternative to strain gauge methods for measuring stress waves in rock is to measure the res~orme in a water filled borshole. A Lagr~nglan finite difference computer code has been used to investigate the difficulties associated with the me~cd. An idealized plane strain case (infinitely long horehcle) has been studied. Curves for pressure amd particle velocity versus time in the borehole are cc~pared with the corresponding curves on the original stress wave. The ccm~tations show that the method is feasible for measuring the peak pressure of the stress wave. Auth. Avail: The Foundation, Box 32058, S-126 ii, Stockholm, Sweden
816189 PROBABILITY
OF FLYROCK Lunibcrg, N Swedish Detonic Research Fourdation, Report DS 1981:9, 23 April 1981, 39P
Reports model tests, half scale amd full scale blasting tests, amd calculates maxim~n throw and probability of hit by flyrock. Reports observations during a number of production roumds at various sites in Sweden. Avail: The Four,i%tion, Box 32058, S-126 ll, Stockholm, Sweden
816186 NUMERICAL MODELLING OF AN EXPLOS.~fE CHARGE IN A BOREHCLE Cooper, T Swedish Detonic Research Foundation, Report DS 1980:1, 7 Feb 1980, 15P Avail: The Foundation~ Box 32058, S-126 Ii, Stockholm, Sweden
Crushing and grinding 816187 AUTOGENOUS ATIg/rION MICROGRINDING OF CALCIUM CARBONATE MINERALS Hansen, J P; Davis, E G; S,,11~v~_n, G V US Bureau of Mines report RI 8503, 1981, 15P Avail: USEM, 4800 Forbes Avenue, Pittsburgh, Fa, 15213 USA 816188 COMMINUTION BY THE ATTRITION GRINDING PROCESS Stanczyk, H; Feld, I L US Bureau of Mines Bulletin B670 , 1980, 43P The process involves the intense agitation of a slurry composed of the material to be ground, a granular griniimg medit~n and a suspe~iing fluid. Research has shown th~ process to be feasible for a variety of materials. Avail: Su;erinte~ient of Documents, USGPO, Washington, DC, 20402 USA
Cutting 816189 %q~RATORY CUTIING OF BRCXCN C0~l. TECHNICAL NCTE Gottlieb, L; Moore, P J Int J Rock Mech Min Scl, VIS, ~ , Aug 1981, F335-339
Blasting See also: 816177 816180 ENGINEERING ASPECTS OF UNDERGEOUND CAVERN EXCAVATION AT DINOEWIC - PART 3. A S~JDY OF BLAST VIBRATIONS, PART 1 Isaac, I D; Bubb, C Tunn Turmlg, V24, N6, July 1981, P35-41 First describes the envirommental considerations which influenced the design of the drilling and blasting patterns and how measurements were made at Dinc~wic. Discusses the criteria asst~ed far establishing ground v i b r a t i o n t ~ s m e t e T s amd how the monitored results were used to design a~i control blasts. Results a r e compared with recent work carried out in Scandinavia. 816181 E ? ~ G I ~ I N G ASPECTS OF UND~RGROUED C A V ~ EXCAVATION AT DINOEWIC - PART 2. DRYTfTNG AND BLASTING Isaac, I D; Bubb, C Tunn Tunmlg, VI3, NS, June 1981, F19-21 The general principles uf drilling amd blasting urdergrouni caverns at Dinorwic are described, shcwing how the varying techniques were adapted to meet local conditions. Typical blast patterns are illustrated, showing how they were adapted for blasting heavily Jointed rock. The influence on drilling and charging patterns of the plant used is also discussed. 816182 SPHERICAL CE~RGE CRATERING - FLANE AND ANGLE GEOMETRY INVOLVING SM~IL-SCALE ANGLE AND ROW TESTS MacLachlan, R R; Salrmm, D E; Barclay~ R J CIM Bull, V74, N829, May 1981, P81-85 The ~est objectives were: (i) to observe the c h a ~ e in single-charge cratering perfc~,,a~e between plane-surface and angle geometry, (2) to ideztify the optimum perfcm~ance of single charges cratering to a plane surface, craterimg from a bench sub-grade position and cratering from a condition of zero sub-grade or stope wall geometry, and (3) to observe the performamce of row-of-charges craterizg to an angular surface at various row burials and spacing. The row charge burial and spacing dimensions were to be expressed in simple ~merical multiples of single-charge depth-of-burial data. 816183 SWEDISH CAUTIOUS BLAST EXCAVATION AT TEE C S ~ 0NVI TEST SITE IN COLORADO Holmberg, R; HusTAnllid, W Swedish Detonic Research Foundation, Report DS 1981:1, 16 Feb 19@1, ZIP Describes the excavation of a test roam at the Colorado School of Mines Experimental Mine in Idaho Springs, Colorado, utillslng the techniques of Presplitting ani smooth blasting. Avail: The Foundation, Box 32058, S-126 ll, Stockholm, Sweden 816181~ NUMERICAL INVESTIGATION OF A METHOD FOR STRESS WAVE M E A ~ IN ROCK Cooper, T; BJarmholt, G Swedish Detonlc Research Foundation~ Report DS 1981:2, 7 AprCI 1981, 16P
An alternative to strain gauge methods for measuring stress waves in rock is to measure the res~orme in a water filled borshole. A Lagr~nglan finite difference computer code has been used to investigate the difficulties associated with the me~cd. An idealized plane strain case (infinitely long horehcle) has been studied. Curves for pressure amd particle velocity versus time in the borehole are cc~pared with the corresponding curves on the original stress wave. The ccm~tations show that the method is feasible for measuring the peak pressure of the stress wave. Auth. Avail: The Foundation, Box 32058, S-126 ii, Stockholm, Sweden
816189 PROBABILITY
OF FLYROCK Lunibcrg, N Swedish Detonic Research Fourdation, Report DS 1981:9, 23 April 1981, 39P
Reports model tests, half scale amd full scale blasting tests, amd calculates maxim~n throw and probability of hit by flyrock. Reports observations during a number of production roumds at various sites in Sweden. Avail: The Four,i%tion, Box 32058, S-126 ll, Stockholm, Sweden
816186 NUMERICAL MODELLING OF AN EXPLOS.~fE CHARGE IN A BOREHCLE Cooper, T Swedish Detonic Research Foundation, Report DS 1980:1, 7 Feb 1980, 15P Avail: The Foundation~ Box 32058, S-126 Ii, Stockholm, Sweden
Crushing and grinding 816187 AUTOGENOUS ATIg/rION MICROGRINDING OF CALCIUM CARBONATE MINERALS Hansen, J P; Davis, E G; S,,11~v~_n, G V US Bureau of Mines report RI 8503, 1981, 15P Avail: USEM, 4800 Forbes Avenue, Pittsburgh, Fa, 15213 USA 816188 COMMINUTION BY THE ATTRITION GRINDING PROCESS Stanczyk, H; Feld, I L US Bureau of Mines Bulletin B670 , 1980, 43P The process involves the intense agitation of a slurry composed of the material to be ground, a granular griniimg medit~n and a suspe~iing fluid. Research has shown th~ process to be feasible for a variety of materials. Avail: Su;erinte~ient of Documents, USGPO, Washington, DC, 20402 USA
Cutting 816189 %q~RATORY CUTIING OF BRCXCN C0~l. TECHNICAL NCTE Gottlieb, L; Moore, P J Int J Rock Mech Min Scl, VIS, ~ , Aug 1981, F335-339