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Pemali open pit mine slope stability problem
183A dredged river sand for the core. It was extensively instru~nented. Strains and loads measured were within those estimated during the design stage. Significant cost savings are possible compared to current embankment construction practices.
Hydraulic structures 913424 Stability of breakwaters on poor foundation Lundgren, H; Jacobsen, H C L; Romhild, C J Proe 12th International Conference on Soil Mechanics and FoMdution Engineering, Rio de Janeiro, 1:1-18 August 1989 VI, P451-454. Publ Rotterdam: A A Balkema, 1989 Breakwaters are exposed to large wave loads. Stability problems of rubble mound breakwaters and their foundations subject to earthquake or wave Ioadings are examined. Where foundation soils are weak, they may be excavated and replaced by sand. The use of a submerged breakwater with piled wave screen founded through fill materials and sand replacing poor ground is illustrated.
Slopes See also: 913259, 913269, 913519 913425 Predicting deposition of debris flows in mountain channels Benda, L E: Cundy, T W Can Geotech J V27. N4. Aug 1990, P409-417 Debris flows in confined mountain channels were studied in the Knowles Creek Basin of the Oregon Coast Range, USA. Initiation, travel distance and erosion, deposition, and gradation were examined. An empirical model to predict deposition has been developed which uses two criteria, channel slope angle and tributary junction angle. It has been tested against flows in the study area and from other regions, where approximate travel distances were estimated from aerial photographs, and gives satisfactory results. 913426 Instrumented laboratory flowslides Eckersley. D Geotecbnique V40, N3, Sept 1990, P489-502 Slides were initiated in lm high slopes of coking coal in a flowslide tank by saturation of the base and slow pore pressure increase. Events reproduced field behaviour, with sudden collapse, rapid flow-like motion, and very flat final slopes. Failure initiated under essentially static, drained conditions, where the effective strength parameter was considerably less than the steady state value. Instrumentation revealed excess pore pressures were generated during rather than before movement, liquefaction being a result of shear failure rather than a cause.
913427 Centrifugal modeling of drains for slope stabilization Resnick, G S: Znidarcic, D J Geotech Engng Div ASCE FlI6, Nil, Nov 1990. P!6071624 Layout of horizontal drains used to stabilise slopes is usually determined from design charts or on the basis of engineering judgement. Centrifuge tests on model drained slopes have been used to study distribution of phreatic levels within the slopes, and results are compared to reference tests on undrained slopes and computer simulations. Data can be used
to verify or develop design charts. The limited capacity of the centrifuge used places restrictions on slope geometry, but the usefulness of the approach is demonstrated.
913428 Engineering geological and geotechnical investigation for slope stability evaluation of deep opeocast mines in complex geological conditions Herstus, J Proc 5th International Congress International Association of Engineering Geology, Buenos Aires, 20-25 October 1986 V4, P2311-2318. Publ Rotterdam: A A Balkema, 1990 The stability of opencast mine slopes, several hundreds of meters high, has been studied by means of geological investigations and measurements of geostatic stress, shearing resistance, and deformational properties of the rock massif. On the basis of analysis made by the finite element method, the development of slope disturbance has been predicted and a monitoring system has been proposed. The data obtained using this system are employed for refining the prognosis of the slope behaviour during proceeding mining work. Auth. 913429 Application of engineering geological investigation and mapping techniques for stability assessment of an urban slope in weathered rock in Hong Kong lrfan, T Y; Cipullo, A Proc 6th International Congress International Association of Engineering Geology, Amsterdam, 6-10 August 1990 VI, P141-150. Publ Rotterdam: A A Balkema, 1990 Given the complexity of the geology in Hong Kong, high annual rainfall, and existence of old, poorly designed slopes, engineering geological investigations and mapping arc of great importance. In ensuring slope stability, especially in weathered rocks, old slopes are studied and reassessed in order to identify those requiring stabilization. These studies include aerial photographic interpretation, geological mapping, sampling, and probing. Details of these studies, including groundwater monitoring and the slope model, are presented.
913430 Pemali open pit mine slope stability problem Manaf, M H; Bhattacharyya, A K Proc 2nd Conference on Large Open Pit Mining, Latrobe Valley, 3-6 April 1989 PI3-17. Publ Melbourne: AuslMM, 1989 The Pemali open pit mine has experienced slope stability problems, most of which have been associated with high rainfall. Measures to reduce these problems include reducing the overall slope angle to 20 deg, construction of drainage ditches and trenches, and installation of drainage holes at the bench toes. Back analysis using the major west wall failure and the application of computer programs using the obtained parameters in order to stabilise the east wall are discussed.
913431 Mine planning and geotechnical considerations in the development of the western batters of Yallourn olin cut mine Newcomb, S R; Tilley, J L Proc 2nd Conference on Large Open Pit Mining, Latrobe Valley, 3-6 April 1989 P19-24. Publ Melbourne: AuslMM, 1989 Detailed site and laboratory investigations were carried out at the Yallourn mine in order to improve the geological understanding of the area and instigate a water pressure monitoring program. Hydraulic fracturing techniques were employed to
:9 1991 Pergamon Press plc. Reproduction not permitted
Hydraulic structures 913424 Stability of breakwaters on poor foundation Lundgren, H; Jacobsen, H C L; Romhild, C J Proe 12th International Conference on Soil Mechanics and FoMdution Engineering, Rio de Janeiro, 1:1-18 August 1989 VI, P451-454. Publ Rotterdam: A A Balkema, 1989 Breakwaters are exposed to large wave loads. Stability problems of rubble mound breakwaters and their foundations subject to earthquake or wave Ioadings are examined. Where foundation soils are weak, they may be excavated and replaced by sand. The use of a submerged breakwater with piled wave screen founded through fill materials and sand replacing poor ground is illustrated.
Slopes See also: 913259, 913269, 913519 913425 Predicting deposition of debris flows in mountain channels Benda, L E: Cundy, T W Can Geotech J V27. N4. Aug 1990, P409-417 Debris flows in confined mountain channels were studied in the Knowles Creek Basin of the Oregon Coast Range, USA. Initiation, travel distance and erosion, deposition, and gradation were examined. An empirical model to predict deposition has been developed which uses two criteria, channel slope angle and tributary junction angle. It has been tested against flows in the study area and from other regions, where approximate travel distances were estimated from aerial photographs, and gives satisfactory results. 913426 Instrumented laboratory flowslides Eckersley. D Geotecbnique V40, N3, Sept 1990, P489-502 Slides were initiated in lm high slopes of coking coal in a flowslide tank by saturation of the base and slow pore pressure increase. Events reproduced field behaviour, with sudden collapse, rapid flow-like motion, and very flat final slopes. Failure initiated under essentially static, drained conditions, where the effective strength parameter was considerably less than the steady state value. Instrumentation revealed excess pore pressures were generated during rather than before movement, liquefaction being a result of shear failure rather than a cause.
913427 Centrifugal modeling of drains for slope stabilization Resnick, G S: Znidarcic, D J Geotech Engng Div ASCE FlI6, Nil, Nov 1990. P!6071624 Layout of horizontal drains used to stabilise slopes is usually determined from design charts or on the basis of engineering judgement. Centrifuge tests on model drained slopes have been used to study distribution of phreatic levels within the slopes, and results are compared to reference tests on undrained slopes and computer simulations. Data can be used
to verify or develop design charts. The limited capacity of the centrifuge used places restrictions on slope geometry, but the usefulness of the approach is demonstrated.
913428 Engineering geological and geotechnical investigation for slope stability evaluation of deep opeocast mines in complex geological conditions Herstus, J Proc 5th International Congress International Association of Engineering Geology, Buenos Aires, 20-25 October 1986 V4, P2311-2318. Publ Rotterdam: A A Balkema, 1990 The stability of opencast mine slopes, several hundreds of meters high, has been studied by means of geological investigations and measurements of geostatic stress, shearing resistance, and deformational properties of the rock massif. On the basis of analysis made by the finite element method, the development of slope disturbance has been predicted and a monitoring system has been proposed. The data obtained using this system are employed for refining the prognosis of the slope behaviour during proceeding mining work. Auth. 913429 Application of engineering geological investigation and mapping techniques for stability assessment of an urban slope in weathered rock in Hong Kong lrfan, T Y; Cipullo, A Proc 6th International Congress International Association of Engineering Geology, Amsterdam, 6-10 August 1990 VI, P141-150. Publ Rotterdam: A A Balkema, 1990 Given the complexity of the geology in Hong Kong, high annual rainfall, and existence of old, poorly designed slopes, engineering geological investigations and mapping arc of great importance. In ensuring slope stability, especially in weathered rocks, old slopes are studied and reassessed in order to identify those requiring stabilization. These studies include aerial photographic interpretation, geological mapping, sampling, and probing. Details of these studies, including groundwater monitoring and the slope model, are presented.
913430 Pemali open pit mine slope stability problem Manaf, M H; Bhattacharyya, A K Proc 2nd Conference on Large Open Pit Mining, Latrobe Valley, 3-6 April 1989 PI3-17. Publ Melbourne: AuslMM, 1989 The Pemali open pit mine has experienced slope stability problems, most of which have been associated with high rainfall. Measures to reduce these problems include reducing the overall slope angle to 20 deg, construction of drainage ditches and trenches, and installation of drainage holes at the bench toes. Back analysis using the major west wall failure and the application of computer programs using the obtained parameters in order to stabilise the east wall are discussed.
913431 Mine planning and geotechnical considerations in the development of the western batters of Yallourn olin cut mine Newcomb, S R; Tilley, J L Proc 2nd Conference on Large Open Pit Mining, Latrobe Valley, 3-6 April 1989 P19-24. Publ Melbourne: AuslMM, 1989 Detailed site and laboratory investigations were carried out at the Yallourn mine in order to improve the geological understanding of the area and instigate a water pressure monitoring program. Hydraulic fracturing techniques were employed to
:9 1991 Pergamon Press plc. Reproduction not permitted