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Study of deep open cut mining systems at the Leigh Creek coalfield, South Australia
ll3A shape of the sliding section is wave like, and that particle rotation has a major function in determining the sliding zone of a section. 902391 Influence of slope on subsurface drainage of hillsides Fipps, G; Skaggs, R W Water Resoar Res 1/25, N7, July 1989, P1717-1726 The influence of slope on drainage flow rates and water table level in the central portion of a sloping hillside is examined. Solutions to the two dimensional Richards equation are obtained for slopes with parallel drain tubes located above a sloping impervious layer. Drainage is simulated for two soils and two profile depths under steady state and transient conditions. Two different downslope conditions are considered, a ditch and a horizontal drain intersecting the parallel drain tubes. 902392 Study of deep open cut mining systems at the Leigh Creek coalfield, South Australia O'Brien, M D; Swift, D G Proc International Symposium on Mine Planning and Equipment Selection, Calgary, 3-4 November 1988 P475-483. Publ Rotterdam: A A Balkema. 1988 A detailed study was undertaken of possible methods of mining to and below 200m depth. Current shovel and truck practices are first outlined. Phase I of the study considered 9 feasibility schemes developed from examination of methods for breaking, loading, transporting and disposal of overburden. Phase 2 made a more detailed examination of 4 schemes. Phase 3 considered the terrace haulback system and modified current methods in more detail. This suggested a change to the terrace haulback system on cost grounds. 902393 Design considerations and performance rating of cut slopes under the tropical weathering conditions of Ghana Ayetey, J K Proc 1st Regional Conference for Africa, Rock Mechanics in Africa, Swaziland, 3-4 November 1988 P233-239. Publ Marshaltown: SANGORM, 1988
902395 Slope stability analysis of the north wall of Fnshun open-pit He Manchao; Liu Wenbin; Chen Zhida Proc 2nd International Symposium on Field Measurements in Geomechanics, Kobe, 6-9 April 1987 VI, P501-513. Publ Rotterdam: A A Balkema, 1988 Three main failure modes, circular, non-circular and plane, have been identified on the unstable north wall. Experimental models of the 3 types are presented. A stability analysis has been developed, which considers curvature effect in the sliding process for different failure modes, rock mass structure, hydrogeological structure and load state. The analysis is applied to a section of the pit. Static and dynamic stability analyses and sensitivity analysis were carried out. 902396 Inclinometer measurements for observation of high slopes in an open-cast coal mine Libal, J; Kopic, J; Rozsypal, A Proc 2nd International Symposium on Field Measurements in Geomecbanics, Kobe, 6-9 April 1987 VI, P515-520. Publ Rotterdam: A A Balkema, 1988 A monitoring system was implemented to obtain continuous observations of the behaviour of slopes for an open pit mine in an area of high tectonic disturbance. Inclinometers were installed in 14 boreholes at depths up to 200m to measure horizontal deformation. A new procedure for connecting casings is described. Experimental measurements were carried out to assess the effect of mechanical wear of the instrument, temperature, and probe error. 902397 Field measurements and computational models for solving an open pit mine stability problem Dolezalava, M; Rozsypal, A Proc 2nd International Symposium on Field Measurements in Geomechanics, Kobe, 6-9 April 1987 VI, P521-530. Publ Rotterdam: A A Balkema, 1988
Weathering related properties of rock masses have been examined from the viewpoint of slope design. Fresh massive rocks like granite deteriorate less rapidly than foliated rocks like phyllites or schist. Structural discontinuities are a major factor, as their strength variation on weathering can significantly influence stability. Weathering must be taken into account at initial stages of cut slope design. Recommendations for slope design, slope protection and maintenance are made.
Computer models and a field monitoring system were used to study slope stability at an open pit mine. The finite element method used for a cross section where a pillar of debris and clay was left to protect the crystalline rock slope is described and solutions presented. The monitoring system included inclinometers in boreholes, extensometers, acoustic emission monitoring and water table measurement in boreholes. Slow movement of a large volume of basin deposits was indicated. Computed and observed values are compared, showing reasonable agreement.
902394 Measurement of displacements and execution management for fractured rock slope using laser beam and its sensor Kadota, S; Ohnishi, S; Gotoh, T; Ishii, T; Sugihara, S Proc 2nd International Symposium on Field Measurements in Geomechanics, Kobe, 6-9 April 1987 VI, P493-500. Publ Rotterdam: A A Balkema, 1988
902398 Some aspects of field measurements for slopes in residual soils Brand, E W Proc 2nd InternationalSymposium on Field Measurements in
Displacement of a rock slope and axial force of rock anchors were measured during excavation. The laser beam and sensor technique used to measure displacement is described. Before construction began, the displacement pattern and axial forces were predicted using finite element analysis, taking excavation procedure and distribution of anchors into account. Calculated values were compared with measured values showing reasonable agreement on maximum displacement, but disparity over displacement patterns.
Geomechanics, Kobe, 6-9 April 1987 VI. P531-547. Publ Rotterdam." A A Balkema, 1988 The application of field measurements to design and stability analysis of slopes in residual soils is discussed. Characteristics of residual materials, pore pressure changes caused by rainfall, and slope design in Hong Kong are outlined. A number of the field tests used are described: direct shear tests, piezometers, and tensiometers. Automatic pore pressure systems are described, including the scanivalve used in Hong Kong and TRRL acoustic used in Indonesia. 39 refs.
© 1990 Pergamon Press plc. Reproduction not permitted
902395 Slope stability analysis of the north wall of Fnshun open-pit He Manchao; Liu Wenbin; Chen Zhida Proc 2nd International Symposium on Field Measurements in Geomechanics, Kobe, 6-9 April 1987 VI, P501-513. Publ Rotterdam: A A Balkema, 1988 Three main failure modes, circular, non-circular and plane, have been identified on the unstable north wall. Experimental models of the 3 types are presented. A stability analysis has been developed, which considers curvature effect in the sliding process for different failure modes, rock mass structure, hydrogeological structure and load state. The analysis is applied to a section of the pit. Static and dynamic stability analyses and sensitivity analysis were carried out. 902396 Inclinometer measurements for observation of high slopes in an open-cast coal mine Libal, J; Kopic, J; Rozsypal, A Proc 2nd International Symposium on Field Measurements in Geomecbanics, Kobe, 6-9 April 1987 VI, P515-520. Publ Rotterdam: A A Balkema, 1988 A monitoring system was implemented to obtain continuous observations of the behaviour of slopes for an open pit mine in an area of high tectonic disturbance. Inclinometers were installed in 14 boreholes at depths up to 200m to measure horizontal deformation. A new procedure for connecting casings is described. Experimental measurements were carried out to assess the effect of mechanical wear of the instrument, temperature, and probe error. 902397 Field measurements and computational models for solving an open pit mine stability problem Dolezalava, M; Rozsypal, A Proc 2nd International Symposium on Field Measurements in Geomechanics, Kobe, 6-9 April 1987 VI, P521-530. Publ Rotterdam: A A Balkema, 1988
Weathering related properties of rock masses have been examined from the viewpoint of slope design. Fresh massive rocks like granite deteriorate less rapidly than foliated rocks like phyllites or schist. Structural discontinuities are a major factor, as their strength variation on weathering can significantly influence stability. Weathering must be taken into account at initial stages of cut slope design. Recommendations for slope design, slope protection and maintenance are made.
Computer models and a field monitoring system were used to study slope stability at an open pit mine. The finite element method used for a cross section where a pillar of debris and clay was left to protect the crystalline rock slope is described and solutions presented. The monitoring system included inclinometers in boreholes, extensometers, acoustic emission monitoring and water table measurement in boreholes. Slow movement of a large volume of basin deposits was indicated. Computed and observed values are compared, showing reasonable agreement.
902394 Measurement of displacements and execution management for fractured rock slope using laser beam and its sensor Kadota, S; Ohnishi, S; Gotoh, T; Ishii, T; Sugihara, S Proc 2nd International Symposium on Field Measurements in Geomechanics, Kobe, 6-9 April 1987 VI, P493-500. Publ Rotterdam: A A Balkema, 1988
902398 Some aspects of field measurements for slopes in residual soils Brand, E W Proc 2nd InternationalSymposium on Field Measurements in
Displacement of a rock slope and axial force of rock anchors were measured during excavation. The laser beam and sensor technique used to measure displacement is described. Before construction began, the displacement pattern and axial forces were predicted using finite element analysis, taking excavation procedure and distribution of anchors into account. Calculated values were compared with measured values showing reasonable agreement on maximum displacement, but disparity over displacement patterns.
Geomechanics, Kobe, 6-9 April 1987 VI. P531-547. Publ Rotterdam." A A Balkema, 1988 The application of field measurements to design and stability analysis of slopes in residual soils is discussed. Characteristics of residual materials, pore pressure changes caused by rainfall, and slope design in Hong Kong are outlined. A number of the field tests used are described: direct shear tests, piezometers, and tensiometers. Automatic pore pressure systems are described, including the scanivalve used in Hong Kong and TRRL acoustic used in Indonesia. 39 refs.
© 1990 Pergamon Press plc. Reproduction not permitted