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Friction rock stabilisers, and why they work
45A
792229 RESIN-REINFORCED ROCEBOLT CLASSIFICATION (IN
RU~ZAN) Shlrokov, A P Ugol Ukrai~, NI2, Dec 1977, P8-12 Presents a classification scheme based on design ard properties which includes bolts available in USSR, UK and USA. 792230 FRICTION ROCK STABILIS~S, AND WHY THEY WORK Scott, J J Proc iRth US Symposium on Rock Mechanics, Stateline, N e ~ a , 1-3 May 1978, VI, I~92494. Publ Reno: University of Nevada, 1978 It is estimated that 25 pe~ cent of the roof contrOl fixtures now used in U.S. uranium mimes are friction rock stabilizers. This paper discusses the device itself, the mechanism by which it functions and-compares this mechanism with mare common devices such as the mechanical roof bolt and the resin rebar system. Case histories are described briefly.
792235 CHANCES A~D LIMITATIONS OF GROUND FREEZING WITH LIQUID NITROGEN Stoss, ~ Valk, J Proc let Intermatiomal Symposium on Ground Freezing, Bochumj 8-10 March 1978, P303-311. Pt~l: Boch1~m, Rtuhr Umiversity, 1978 792236 APPLICATION OF THE GROUND FBk~TING METEOD TO PENETRATE A SEQ~NCE OF WATEMHEARING AND DRY FORM~IONS - 3 CONSTRUCTION CASES Rupprecht, E Proc let Intermational Symposium on Groumd Freezing, Boehum, 8-i0 March 1978, P357363. Publ: Bochum, Rubr University, 1978 792237 THERMAL AI~ HHEOLOGICAL C(~4PUTATIONS FOR ARTIFICIALLY FROZEN GROUND CONSTRUCTION Sar~er, F J; Sayles, F H US Army COld Regions Research and Engineering Lab report MP 1078, 1978, 14P
Site Investigation and Field Observation
792231 TES~f OF INORGANIC REPLACEMENTS FOR RESINS Wang, F D; Zimk, G; Wolgammott, J USBM OFR 59-78, Sept 1976, 84P The polymeric-resin-borzled bolt has generally proved to be mare effective than the mechanically anchored roof bOlt, but the higher cost of the resin bolt has limited its application. LabQratc~- tests of four types were performed on various rapid-set amd accelerated cement products to find a material with properties suitable for replacing resins. A proprietary gypsum cement was ultimately used with good success. A field tesb of the cement grout in an operating coal mine is reported.
792238 PRACTICAL G E O ~ C S AND THE A T T I T ~ TO SOILS INVESTIGATION Wakeliz~, T R M Ground Engng, celebration issue, 1978, P28-29 Defines amd discusses three stages in a groumd investigation project and then reviews progress in the areas of sampling, determination of stremgth arzl deformation of soils, rig design, over-water site investigation.
Avail: ~TfIS, Springfield, Va, 22161, USA (PB 283 963/AS)
Grouting
792239 DESIGN AND DEVELOPMEN9 OF THE ~t&GNETIC CANTILEVER EXTENSOMETER Smart, B G D; Singh, R N; Isaac, A K Int J Rock Mech Min Sci, V15, N6, Dec 1978, P269-276
792232 GROUTING THE ~ N I A N CENfRAL PLATFORM'S UNDERBASE Ground Engng, VII, NS, Nov 1978 , P17-22
The design and development of a new multi-Posi-
tion bc~ehole extensometer is described. Details include small button magnets located on the borehole sides for reference purposes, whilst a probe is guided in a flexible grooved casing for locating the precise centre of a reference point amd a depth monitor fixes its vertical position. Results of laboratory feasibility studies and the borehole simulation survey are included. The instrumentation has a special application in boreholes where drilling of a long, straight borehole is not alw%ys possible.
Reports the operation in which cement-PFA-seawater grout was mixed ard injected into 33 cells beneath the sea bed and the underside of the 140m diameter base, the central s h a ~ base amd 20 balLast pipes of the 600000 tonne platform.
Freezing 792{33 GROUND FEAZING MONITORING TECHNIQUES Heinrich, D; Muller, G; Voort, H Proc let International Symposiuzn on GroILnd Freezing, Bochum, 8-10 March 1978, P271-288. Publ: Boch~n, Rthhr University, 1978 792234 GROUND CONSOLIDATION W I ~ LIQUID NITROGEN (LN2) Veranr~man, G; Rebhan, D Proc let International Symposium on Grour~ Freezing, Bochum, 8-10 March 1978, P289-302. Publ: Bochum, Ruhr University, 1978
792240
SUGGESTED METHODS FOR MONITORING ROCK MOVEMENI'S USING B ~ O L E EXTENSOMETERS In~err~tional Society for Rock Mechanics, Commission on Standardisation of Laboratc~y arzl Field Tests Int J Rock Mech Min Sci, V15, N6, Dec 1978 , P305-317 Includes sections on apparatus, procedure s calculations and data processing, and reporting of results.
792229 RESIN-REINFORCED ROCEBOLT CLASSIFICATION (IN
RU~ZAN) Shlrokov, A P Ugol Ukrai~, NI2, Dec 1977, P8-12 Presents a classification scheme based on design ard properties which includes bolts available in USSR, UK and USA. 792230 FRICTION ROCK STABILIS~S, AND WHY THEY WORK Scott, J J Proc iRth US Symposium on Rock Mechanics, Stateline, N e ~ a , 1-3 May 1978, VI, I~92494. Publ Reno: University of Nevada, 1978 It is estimated that 25 pe~ cent of the roof contrOl fixtures now used in U.S. uranium mimes are friction rock stabilizers. This paper discusses the device itself, the mechanism by which it functions and-compares this mechanism with mare common devices such as the mechanical roof bolt and the resin rebar system. Case histories are described briefly.
792235 CHANCES A~D LIMITATIONS OF GROUND FREEZING WITH LIQUID NITROGEN Stoss, ~ Valk, J Proc let Intermatiomal Symposium on Ground Freezing, Bochumj 8-10 March 1978, P303-311. Pt~l: Boch1~m, Rtuhr Umiversity, 1978 792236 APPLICATION OF THE GROUND FBk~TING METEOD TO PENETRATE A SEQ~NCE OF WATEMHEARING AND DRY FORM~IONS - 3 CONSTRUCTION CASES Rupprecht, E Proc let Intermational Symposium on Groumd Freezing, Boehum, 8-i0 March 1978, P357363. Publ: Bochum, Rubr University, 1978 792237 THERMAL AI~ HHEOLOGICAL C(~4PUTATIONS FOR ARTIFICIALLY FROZEN GROUND CONSTRUCTION Sar~er, F J; Sayles, F H US Army COld Regions Research and Engineering Lab report MP 1078, 1978, 14P
Site Investigation and Field Observation
792231 TES~f OF INORGANIC REPLACEMENTS FOR RESINS Wang, F D; Zimk, G; Wolgammott, J USBM OFR 59-78, Sept 1976, 84P The polymeric-resin-borzled bolt has generally proved to be mare effective than the mechanically anchored roof bOlt, but the higher cost of the resin bolt has limited its application. LabQratc~- tests of four types were performed on various rapid-set amd accelerated cement products to find a material with properties suitable for replacing resins. A proprietary gypsum cement was ultimately used with good success. A field tesb of the cement grout in an operating coal mine is reported.
792238 PRACTICAL G E O ~ C S AND THE A T T I T ~ TO SOILS INVESTIGATION Wakeliz~, T R M Ground Engng, celebration issue, 1978, P28-29 Defines amd discusses three stages in a groumd investigation project and then reviews progress in the areas of sampling, determination of stremgth arzl deformation of soils, rig design, over-water site investigation.
Avail: ~TfIS, Springfield, Va, 22161, USA (PB 283 963/AS)
Grouting
792239 DESIGN AND DEVELOPMEN9 OF THE ~t&GNETIC CANTILEVER EXTENSOMETER Smart, B G D; Singh, R N; Isaac, A K Int J Rock Mech Min Sci, V15, N6, Dec 1978, P269-276
792232 GROUTING THE ~ N I A N CENfRAL PLATFORM'S UNDERBASE Ground Engng, VII, NS, Nov 1978 , P17-22
The design and development of a new multi-Posi-
tion bc~ehole extensometer is described. Details include small button magnets located on the borehole sides for reference purposes, whilst a probe is guided in a flexible grooved casing for locating the precise centre of a reference point amd a depth monitor fixes its vertical position. Results of laboratory feasibility studies and the borehole simulation survey are included. The instrumentation has a special application in boreholes where drilling of a long, straight borehole is not alw%ys possible.
Reports the operation in which cement-PFA-seawater grout was mixed ard injected into 33 cells beneath the sea bed and the underside of the 140m diameter base, the central s h a ~ base amd 20 balLast pipes of the 600000 tonne platform.
Freezing 792{33 GROUND FEAZING MONITORING TECHNIQUES Heinrich, D; Muller, G; Voort, H Proc let International Symposiuzn on GroILnd Freezing, Bochum, 8-10 March 1978, P271-288. Publ: Boch~n, Rthhr University, 1978 792234 GROUND CONSOLIDATION W I ~ LIQUID NITROGEN (LN2) Veranr~man, G; Rebhan, D Proc let International Symposium on Grour~ Freezing, Bochum, 8-10 March 1978, P289-302. Publ: Bochum, Ruhr University, 1978
792240
SUGGESTED METHODS FOR MONITORING ROCK MOVEMENI'S USING B ~ O L E EXTENSOMETERS In~err~tional Society for Rock Mechanics, Commission on Standardisation of Laboratc~y arzl Field Tests Int J Rock Mech Min Sci, V15, N6, Dec 1978 , P305-317 Includes sections on apparatus, procedure s calculations and data processing, and reporting of results.