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Large scale continuous attrition grinding of coarse kaolin
43A
HRADY,~H MOUNT ISA MINES L T D . ~ , A U S F~X,R ICl AUSIRALIA LTD.VICTC~IA~AUS ~IIIIAMS, DA ICI AUSTRALIA LTD.VICTORIA, AUS SIm~v explosives umderground at Mount Isa Mines Ltd: 5F, 5T, IIR. , PROC. AUST~ALAS. INSI .MIN.MET. N247, i y(3, P35-44. Field teats of a system for the bulk loadimg of '~ola~ite", an ,~m~i~m ~Itrate slm~ry blasting agent i ~ o rimg drilled holes of sublevel open stopes are r ~ The benefits, p e r f o ~ m c e and costs of such a system are discussed.
4oo ANONYMOUS Bemah blasting moves umd~rgroumd at Inco~-Shcc-t report on new technique developed to reduce the preparation phase. 3F. CAN.MIN. J.V94, Nll, IR73, P~O.
Cutting 406 CROW, SC FLOW R E S E A ~ INC.KE~T~WA.USA A theory of hs~Ira~lic rock clzttAmg.-Theory is d e v e l o p e d to explain cutting action of water Jets and is compared to l~rel~,dmary data obtained. 8F, fiR. INg.J.ROCK MECH .MIN. SCI.VlO, N6,1973, P567-584 •
407 Wlil'l'l'A~,BN UNIV. ~ S T T I ~ A M , GB S~ILSKI, AB UNIV. NC~TI~HAM~ GB ROck c~timg by impact action.-An exlx~Imeutal rig designed to test a rock's impact c ~ i m g l~ope~ty is described a~d the practical implications, especially for machine design are discussed. 9F,~R. I~.J.ROCK MECH.MIN. SCI.VIO, ~6,1973, P659-671.
~Ol P~SSON, PA SWED.DETONIC RES.FOUND. S How an explosive can seem expensive amd yet shave blastimg cost~; S~ED.DETONIC RES.FO~E~. DS1971-53 AND ENGNG.Mi~.J. VI7~, N6,1973, FifO- i13. Tables are presented showir~ calculated costs far drillimg stud blastimg using diff~e~t explosive systems, amd um~ar different minding comditions. The effects of air quality~ eqt~pment capacity ar~ secomdary fragmentation are also considered.
4o2 RIBOVICH, J WATSON, RW Active list of permissible explosives and blasting devices approved before December 31, 1972. Supersedes I~fcr~a~ion Circular 8493. Tabls,Refs. US BUR.MINES, IC 8597,1973,10P. SISKIND,DE SIECKLEY, RC OLSON, JJ Fracturing in the zone around a blasthole, White Pine, Michigan;-D~m~ge in shale pillars caused by four types of explosives were studied. Figs,Tabls, Refs. US BUR.MINES, RI 7753,1~73,20P.
Hardness, abrasion and wear 4o8 SINGH, DP BANARAS HINDU UNIV.VARAMESI, IND The drillability of rocks. 4F, BgR. MINER. SCI. ENGE13.VS,NS, 1973~ P255-260. The i m p o r t a r ~ e o f t h e s t u d y of t h e drill~bility of rocks is describedj and various suggeetioms are made for evolvimg a drillabillty index. The relationship between drillability a~d the physical and mechanical ~roperties of rocks is discussed. A consideration of power input for the study of drillability is included amd the evolution of a drillability imdex by measuring crater vol~nes produced by an impact tester is mentioned. ~rillabillty based on mlcrobit drilling of small samples is also briefly discussed. Auth. ~k~RYK~IKO, NP DALGIPROGORMASH, ART~, SU Experimental study of the re3 ation between the relative reeistamce of rock and pur ch penetratiom depth. IF, ~£, 5R. SO~qET MIN. SCI.VT, N4,1971, P~24-426. The results of the study indicate that the relative resistance to punch penetration increases with depth. Up to 5 cm~ the relative resistance of the rock varies linearly with the punch penetration depth. The relation is not affected by the type of rock or the shape of the punch.
Crushing and grinding DAVIS, EG COLLINS, EW F~V~, IL Large scale continuous attrition grimdlr~ of coarse kaolin. Report. 7F. US BUR.MINES, RI 7771,1973,22P. Large-scale ultra-fine grirdimg teats of a coarse Kaolin were made using a 20-inch-diameter attrition amd a Bureau of Mines developed attrition gcimdimg Irocess in continuous open-and closed-clrcuit systems.
~5 HEYES, GW CSIR0, DIV. CKEM. EN3NG .VICTORIA, AUS KELSALL, DF CSIRO, DIV. ~ . ENGNG .VICTORIA, AUS STE~ART, PS ContinmOus grinding in a s~.~l ! wet rod mill, Part i. Co~psrison with a small ball mill. Part 2. Breakage of some ccmnon ore minerals. 16F, IT,13R. J.POWDER T~Y~N.VT,~6,1973,P319-325 & 337-3~i.
Rock and soil improvement
techniques
410 OLIVER, GB NATIONAL PORTS COUNCIL, GB VAUGHN, PH IMP~R. COLL. SCI .TECHNOL.LONDON, GB Land reclamation ar~ the onshore disposal of maintaiz~nce dredgirJgs. In the emginee~i~g geology of reclamation amd redevelopment. Meeting. 2F,~R. HEG.M~-'A~ OF ENG,.GROUP OF GEOL.SOC.DUHHAM,1973,
PSZ-S3. A r~liew of current disposal proced~'es is foll~;ed by a report of a study of the consolidation chsracT~ristics and improvement of hydraulic clay fills.
HRADY,~H MOUNT ISA MINES L T D . ~ , A U S F~X,R ICl AUSIRALIA LTD.VICTC~IA~AUS ~IIIIAMS, DA ICI AUSTRALIA LTD.VICTORIA, AUS SIm~v explosives umderground at Mount Isa Mines Ltd: 5F, 5T, IIR. , PROC. AUST~ALAS. INSI .MIN.MET. N247, i y(3, P35-44. Field teats of a system for the bulk loadimg of '~ola~ite", an ,~m~i~m ~Itrate slm~ry blasting agent i ~ o rimg drilled holes of sublevel open stopes are r ~ The benefits, p e r f o ~ m c e and costs of such a system are discussed.
4oo ANONYMOUS Bemah blasting moves umd~rgroumd at Inco~-Shcc-t report on new technique developed to reduce the preparation phase. 3F. CAN.MIN. J.V94, Nll, IR73, P~O.
Cutting 406 CROW, SC FLOW R E S E A ~ INC.KE~T~WA.USA A theory of hs~Ira~lic rock clzttAmg.-Theory is d e v e l o p e d to explain cutting action of water Jets and is compared to l~rel~,dmary data obtained. 8F, fiR. INg.J.ROCK MECH .MIN. SCI.VlO, N6,1973, P567-584 •
407 Wlil'l'l'A~,BN UNIV. ~ S T T I ~ A M , GB S~ILSKI, AB UNIV. NC~TI~HAM~ GB ROck c~timg by impact action.-An exlx~Imeutal rig designed to test a rock's impact c ~ i m g l~ope~ty is described a~d the practical implications, especially for machine design are discussed. 9F,~R. I~.J.ROCK MECH.MIN. SCI.VIO, ~6,1973, P659-671.
~Ol P~SSON, PA SWED.DETONIC RES.FOUND. S How an explosive can seem expensive amd yet shave blastimg cost~; S~ED.DETONIC RES.FO~E~. DS1971-53 AND ENGNG.Mi~.J. VI7~, N6,1973, FifO- i13. Tables are presented showir~ calculated costs far drillimg stud blastimg using diff~e~t explosive systems, amd um~ar different minding comditions. The effects of air quality~ eqt~pment capacity ar~ secomdary fragmentation are also considered.
4o2 RIBOVICH, J WATSON, RW Active list of permissible explosives and blasting devices approved before December 31, 1972. Supersedes I~fcr~a~ion Circular 8493. Tabls,Refs. US BUR.MINES, IC 8597,1973,10P. SISKIND,DE SIECKLEY, RC OLSON, JJ Fracturing in the zone around a blasthole, White Pine, Michigan;-D~m~ge in shale pillars caused by four types of explosives were studied. Figs,Tabls, Refs. US BUR.MINES, RI 7753,1~73,20P.
Hardness, abrasion and wear 4o8 SINGH, DP BANARAS HINDU UNIV.VARAMESI, IND The drillability of rocks. 4F, BgR. MINER. SCI. ENGE13.VS,NS, 1973~ P255-260. The i m p o r t a r ~ e o f t h e s t u d y of t h e drill~bility of rocks is describedj and various suggeetioms are made for evolvimg a drillabillty index. The relationship between drillability a~d the physical and mechanical ~roperties of rocks is discussed. A consideration of power input for the study of drillability is included amd the evolution of a drillability imdex by measuring crater vol~nes produced by an impact tester is mentioned. ~rillabillty based on mlcrobit drilling of small samples is also briefly discussed. Auth. ~k~RYK~IKO, NP DALGIPROGORMASH, ART~, SU Experimental study of the re3 ation between the relative reeistamce of rock and pur ch penetratiom depth. IF, ~£, 5R. SO~qET MIN. SCI.VT, N4,1971, P~24-426. The results of the study indicate that the relative resistance to punch penetration increases with depth. Up to 5 cm~ the relative resistance of the rock varies linearly with the punch penetration depth. The relation is not affected by the type of rock or the shape of the punch.
Crushing and grinding DAVIS, EG COLLINS, EW F~V~, IL Large scale continuous attrition grimdlr~ of coarse kaolin. Report. 7F. US BUR.MINES, RI 7771,1973,22P. Large-scale ultra-fine grirdimg teats of a coarse Kaolin were made using a 20-inch-diameter attrition amd a Bureau of Mines developed attrition gcimdimg Irocess in continuous open-and closed-clrcuit systems.
~5 HEYES, GW CSIR0, DIV. CKEM. EN3NG .VICTORIA, AUS KELSALL, DF CSIRO, DIV. ~ . ENGNG .VICTORIA, AUS STE~ART, PS ContinmOus grinding in a s~.~l ! wet rod mill, Part i. Co~psrison with a small ball mill. Part 2. Breakage of some ccmnon ore minerals. 16F, IT,13R. J.POWDER T~Y~N.VT,~6,1973,P319-325 & 337-3~i.
Rock and soil improvement
techniques
410 OLIVER, GB NATIONAL PORTS COUNCIL, GB VAUGHN, PH IMP~R. COLL. SCI .TECHNOL.LONDON, GB Land reclamation ar~ the onshore disposal of maintaiz~nce dredgirJgs. In the emginee~i~g geology of reclamation amd redevelopment. Meeting. 2F,~R. HEG.M~-'A~ OF ENG,.GROUP OF GEOL.SOC.DUHHAM,1973,
PSZ-S3. A r~liew of current disposal proced~'es is foll~;ed by a report of a study of the consolidation chsracT~ristics and improvement of hydraulic clay fills.