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Examples for an adaptable slope protection and their semi-empirical dimensioning (in German)
Z98A
836252 DRYNOCH LANDSLIDE, BRITISH COLUMBIA - A HISTORY VanDine, D F Can Geotech J, V20, NI, Feb 1983, I~2-103 A review of the history of the Drynoch lamdslide, British Columbia. The landslide is geotechnically classified as a zonsl, infinite slope soll failure ard geological evidence indicates it began to move appr~xlmately 30C0-600C years ago.
836253 EXTENSION T O T H E G ~ L I Z E D
METHOD OF SLICES FOR STABILITY ANALYSIS Z u - Y u C h e ~ M(~-genstern, N R Can Geotech J, V20, N!, Feb 1983, PIOA-II9
Extensions are suggested to the generalized method of slices that is c c ~ o n l y used in slope stability analysis. It is shown that restrictions exist on the asst~,-pSions used to make the proble~ statically determinate. In addition, a numerical procedure has been developed to find the bounds to the factor of safety, subject to additional requirements of l~hysical admissibility. As a result of these developments it has been possible to produce a revised computer program that appears to overcome the problems of convergence experienced by other programs in current use. Results obtained with this new analysis confirm the reliability of sevaral methods of analysis used in practice. Auth. 836254 RETAINING MEASURES AND FOUNDATIONS IN ROCK Sm~S (IN G Z ~ N ) Brandl, H Rock Mech, Suppl 12, 1982, P123-145 (Paper to 30th Geomechanlcal CoLloquium, Austrian Society for Oeomechanlcs, Salzburg, 7-9 Oct 1981 ) 836255 EY~}~YLES FOR AN ADAPTABLE SLOPE PROTECTION AND THEIR SEMI-EMPIRICAL DIMENSIONING (IN GERMAN) Ay~ydln, N; l~acher, F Rock Mech, Suppl 12, 1982, P147-161 (Paper to 30th Gecrnee.hauical Co!loqttlt~m, Austrian Society far Gec~.echanics, Salzburg, 7-9
oct 1981 ) During constructior of the 'Tauernautobahn', Austria, several sections of slope of 2 hillside cuts through heavily weathered greywacke had to be secured. A system of anchars with wire mesh and shotcrete, similar to the NATM, was USed. 836256 FROBABILISTIC SLOPF DESIGN FOR OPEN PIT MINES Herget, G Rock Mech, Suppl 12, 1982, P163-178 (Paper to 30th Oeomechanlcal Colloquium, Austrian Society for Geomechanics, salzburg, 7-9 Oct 1981 ) Conventional methods of slope design do not allow the economic influence of pit layout cr the variable nature of the rock and soil to be considered. A procedure to determine the probability that a slope will be stable is described. The risk of slope failure can then be assessed and the benefits and costs associated with steeper slopes can be calculated. 836257 SLOPES OF THE TI~RBELA DA}4 PRCJECT la Villa, G; Golser, J Rock Mech, Suppl 12, 1982, P179-190 (Paper to 30th Geomeehanical Colloqui~, Austrian Society for Gecmechanlcs, Salzburg, 7-9 Oct 198Z )
The Tarbela Dam ~roJect, Pakistan, includes a series of high rock cuts most of which are stable. Two problem areas were the intake partal slope and the spillway plunge pocl areas. Tunral No 2 had collapsed downstream of the intake structure due to unfavourable -~ater flow conditions. Remedial measures hsd to be performed quickly, and shotcrete and rock bolts available on site were used. At the plunge pool area extensive erosion had restdted in hJ gh overhanging rock cliffs which had to be recur to a more stable constructiom.
836258 PROBABILISTPIC ANALYSIS OF SPOIL PILE FAILUREs IN STRIP COAL ~INES Ngt~en, V U CS!RO Division cf Applied Geomechsnlcs report GCM34, 1982, !2P The Monte Carlo simulation technique was used to establish a criterion for selecting a design factor of safety of spoil pile slopes in strip coal mines. The criterion is oDly related to spoil slope failures hsving s two-wedge mechanism. A relationship between the calculated factar of safety and the calculated probability of failure was established and it is recommended that the technique is tested agalnst actual csse histories. Avail: CSIRO Division of Applied Geomechanlcs, PO Box 54, Mt Waverley, Vic 3149, Australia 836259 SPOIL PILE INSTABILITY, SOL~fH BIACKWATER MINE QUEENSLAND Dunbavan, M; Welsh, T C CSIRO Division of Applied Oeomechanics relx~rt
Gc~5, 1~82, 28P An er~ineerlrg geological Investlgstion of spoil pile instabil~ty was undertaken at the South Blackwater open str~p coal mine, Australia. The major cause of instability was identified as an extensive thin stratum of moist cl~yey material about im below the pit-floor, which resulted in the development of a two-wedge slip mechanism. Slope stability back analyses using limiting eq%tilibrium and virtual work methods togethe~ with shear strength testing of samples in the laboratory were used to estimate relevant strength parameters for future mine design. Auth. Avail: CSIRO Division of Applied Geomechanics, PO Bax 54, Mt Waverley, Vic 3149, Australia 836260 REGIONAL STUDY OF THE CLEANSKTN PIT AREA, GOONYk~TA MINE, FINAL REFOF9 Wooltarton, B CSIRO Division of Applied Geomechanics repmrt GCM39, 1982, 35P Presents the results of a detailed study of slope stability related to stress relaxation movements at a relatively great distance from the highwall, carried out at Gcor~ella Mine, Bowen Bssln, Central Oueenslard, Auetralis. Piezometers and inclinometers were installed up to 200 metres from the pit and grounlwater levels and overburden defarmation profiles were mondtared over a five year period. Results suggested a slip-stick mechanism for the ground movements. Two major shear zones were Identified ard shown to extend well back from the hlghwall though no evidence of ground movement was obvlcus from the surface. Avail: CSIRO Division of Applied Geomechsmlcs, PO Box 54, Mt Waverley, Vie 3149, Australia
836252 DRYNOCH LANDSLIDE, BRITISH COLUMBIA - A HISTORY VanDine, D F Can Geotech J, V20, NI, Feb 1983, I~2-103 A review of the history of the Drynoch lamdslide, British Columbia. The landslide is geotechnically classified as a zonsl, infinite slope soll failure ard geological evidence indicates it began to move appr~xlmately 30C0-600C years ago.
836253 EXTENSION T O T H E G ~ L I Z E D
METHOD OF SLICES FOR STABILITY ANALYSIS Z u - Y u C h e ~ M(~-genstern, N R Can Geotech J, V20, N!, Feb 1983, PIOA-II9
Extensions are suggested to the generalized method of slices that is c c ~ o n l y used in slope stability analysis. It is shown that restrictions exist on the asst~,-pSions used to make the proble~ statically determinate. In addition, a numerical procedure has been developed to find the bounds to the factor of safety, subject to additional requirements of l~hysical admissibility. As a result of these developments it has been possible to produce a revised computer program that appears to overcome the problems of convergence experienced by other programs in current use. Results obtained with this new analysis confirm the reliability of sevaral methods of analysis used in practice. Auth. 836254 RETAINING MEASURES AND FOUNDATIONS IN ROCK Sm~S (IN G Z ~ N ) Brandl, H Rock Mech, Suppl 12, 1982, P123-145 (Paper to 30th Geomechanlcal CoLloquium, Austrian Society for Oeomechanlcs, Salzburg, 7-9 Oct 1981 ) 836255 EY~}~YLES FOR AN ADAPTABLE SLOPE PROTECTION AND THEIR SEMI-EMPIRICAL DIMENSIONING (IN GERMAN) Ay~ydln, N; l~acher, F Rock Mech, Suppl 12, 1982, P147-161 (Paper to 30th Gecrnee.hauical Co!loqttlt~m, Austrian Society far Gec~.echanics, Salzburg, 7-9
oct 1981 ) During constructior of the 'Tauernautobahn', Austria, several sections of slope of 2 hillside cuts through heavily weathered greywacke had to be secured. A system of anchars with wire mesh and shotcrete, similar to the NATM, was USed. 836256 FROBABILISTIC SLOPF DESIGN FOR OPEN PIT MINES Herget, G Rock Mech, Suppl 12, 1982, P163-178 (Paper to 30th Oeomechanlcal Colloquium, Austrian Society for Geomechanics, salzburg, 7-9 Oct 1981 ) Conventional methods of slope design do not allow the economic influence of pit layout cr the variable nature of the rock and soil to be considered. A procedure to determine the probability that a slope will be stable is described. The risk of slope failure can then be assessed and the benefits and costs associated with steeper slopes can be calculated. 836257 SLOPES OF THE TI~RBELA DA}4 PRCJECT la Villa, G; Golser, J Rock Mech, Suppl 12, 1982, P179-190 (Paper to 30th Geomeehanical Colloqui~, Austrian Society for Gecmechanlcs, Salzburg, 7-9 Oct 198Z )
The Tarbela Dam ~roJect, Pakistan, includes a series of high rock cuts most of which are stable. Two problem areas were the intake partal slope and the spillway plunge pocl areas. Tunral No 2 had collapsed downstream of the intake structure due to unfavourable -~ater flow conditions. Remedial measures hsd to be performed quickly, and shotcrete and rock bolts available on site were used. At the plunge pool area extensive erosion had restdted in hJ gh overhanging rock cliffs which had to be recur to a more stable constructiom.
836258 PROBABILISTPIC ANALYSIS OF SPOIL PILE FAILUREs IN STRIP COAL ~INES Ngt~en, V U CS!RO Division cf Applied Geomechsnlcs report GCM34, 1982, !2P The Monte Carlo simulation technique was used to establish a criterion for selecting a design factor of safety of spoil pile slopes in strip coal mines. The criterion is oDly related to spoil slope failures hsving s two-wedge mechanism. A relationship between the calculated factar of safety and the calculated probability of failure was established and it is recommended that the technique is tested agalnst actual csse histories. Avail: CSIRO Division of Applied Geomechanlcs, PO Box 54, Mt Waverley, Vic 3149, Australia 836259 SPOIL PILE INSTABILITY, SOL~fH BIACKWATER MINE QUEENSLAND Dunbavan, M; Welsh, T C CSIRO Division of Applied Oeomechanics relx~rt
Gc~5, 1~82, 28P An er~ineerlrg geological Investlgstion of spoil pile instabil~ty was undertaken at the South Blackwater open str~p coal mine, Australia. The major cause of instability was identified as an extensive thin stratum of moist cl~yey material about im below the pit-floor, which resulted in the development of a two-wedge slip mechanism. Slope stability back analyses using limiting eq%tilibrium and virtual work methods togethe~ with shear strength testing of samples in the laboratory were used to estimate relevant strength parameters for future mine design. Auth. Avail: CSIRO Division of Applied Geomechanics, PO Bax 54, Mt Waverley, Vic 3149, Australia 836260 REGIONAL STUDY OF THE CLEANSKTN PIT AREA, GOONYk~TA MINE, FINAL REFOF9 Wooltarton, B CSIRO Division of Applied Geomechanics repmrt GCM39, 1982, 35P Presents the results of a detailed study of slope stability related to stress relaxation movements at a relatively great distance from the highwall, carried out at Gcor~ella Mine, Bowen Bssln, Central Oueenslard, Auetralis. Piezometers and inclinometers were installed up to 200 metres from the pit and grounlwater levels and overburden defarmation profiles were mondtared over a five year period. Results suggested a slip-stick mechanism for the ground movements. Two major shear zones were Identified ard shown to extend well back from the hlghwall though no evidence of ground movement was obvlcus from the surface. Avail: CSIRO Division of Applied Geomechsmlcs, PO Box 54, Mt Waverley, Vie 3149, Australia