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Sky eye monitors tailings dams
18A
structures round the dtump, which attains a maximum width of about 500m and a height of 1520m. Toe-failure generally expands from the dump towards the forefield at an average rate of 6-7m/ds~v. The deformation rate varies with time, which is due to successive shifting of the dump front. Landslides and dislocation systems arise in the heaped masses.
781172 G~0PHYSICAL METHODS FOR THE INVESTIGATION OF LANDSLIDES Bogoslovsky, V A; Ogilvy, A A Geophysics, V42, N3, April 1977, P562-571 Electrical and seismic methods are used to obtain the information needed to determine slope stability. Experience has been gained from long-term investigations carried out in various regions of the USSR. Applications include evaluating geologic and hydrologic conditions related to the occurrence of landslides. Primary attention is devoted to the study of landslide slopes proper. The geologic structure of a landslide is considered in modeling it and determining the thickness of both the landslide body and the slip zone. Self-potential, resistivity, and temperature anomalies are associated with sites of increased landslide activity. Examples of geophysical investigations of landslides in the Crimea, on the Black Sea coast of the Caucasus, and in the Volga River Valley are presented. 781173 SKY EYE MONITORS TAILINGS DAMS Roth, L H; Cesare, J A; Allison, G S Coal Age, V82, N8, Aug 1977, P58-62 Discusses the use of a rapid monitoring system using convergent and vertical photography from conventional fixed wing aircraft. The system was tested on an active landslide and on 2 coal refuse facilities using both black and white colour infrared film. Field tests showed that the system was capable of accurate measurement while producing qualitative data through photointerpretion. 781174 PIT sLOPE MANUAL, SUPPLEMENT 2-3. GEOPHYSICS FOR OPEN PIT SITES Herget, G Canada Centre for Mineral and Energy Technology (CANMET) report 77-22, Sept 1977, 25P Reviews surface and borehole geophysical methods useful in evaluating the distribtuion of rock and soil types and of rock fractures at open pit sites. Emphasises inexpensive, do-ityourself methods for surface work and discusses in detail hammer seismic refraction surveys and electrical resistivity surveys. For borehole logging, describes types of equipment and considers possible benefits and costs of logging for open pit sltes. Avail: CANMET, 555 Booth St, Ottawa, Canada KIA OG1 781175 PIT SLOPE MANUAL, CHAPTER 3. MECHANICAL PROPERTIES Gyenge, M; Herget, G Canada Centre for Mineral and Energy Technology (CANMET) report 77-15, Aug 1977, 87P Discusses planning and execution of a test progrsame to determine shear strengths of material and discontinuities, compressive strength, and other mechanical properties,
statistical analysis of test data, and presentation of test results. Considers test programmes of the different development stages; feasibility, mine design and operation, and their costs, and gives some case histories. Avail: CANMET, 555 Booth St, Ottawa, Canada KIA OGI 781176 PIT SLOPE MANUAL, CHAPT~ 8. MONITORING Larocque, G Canada Centre for M i n ~ a l and Hhergy Technology (CANMET) report 77-15, Aug 1977, 188P Monitoring is divided into 3 levels. Level i is the overall n~nitoring of the walls, designed to locate areas of potential instability, Level 2 is the detailed monitoring of these potential instabilities and Level 3 the monitornlg of actual instabilities, when the pit wall cannot be st~bilised, to allow mining to continue with safety. The 3 levels are discussed in detail and monitoring by rock noise and by railways is also considered. Finally, data collection and presentation and telemetry and the data processing system are discussed. Appendices cover theodolites and EDM, levels, extensometers, inclinometers, inverted pendulums, rock bolt and cable dynamometers, a case history of telemetry system trials, a recommended telemetry system for open pit mines, an FM/FM telemetry system. Avail: C&NMF~, 555 Booth St, Ottawa, Canada KIA OGI
Earth retaining structures 781177 DESIGN AND FIELD BEHAVIOUR OF A REINFORCED EARTH WALL Chang, J C; Forsyth, R A J Geotech Engng Div ASCE, VI03, NGT7, 1977, P677-692 The design and field behaviour of the first reinforced wall in the United States are discussed. It is concluded that active earth pressure should be used for calculating the stresses in the front end portion of the reinforcement and its connection. The at rest earth pressure should be used in designing the central section of the reinforcement. The stresses in the skin plate can be analysed by assuming a hinged end. The vertical deformation of the skin plate on which the calculations are based is proportional to overburden pressure. 781178 FINITE ELL~4ENT ANALYSIS OF REINFORCED K~RTH WAL Chang, J C; Forsyth, R A J Geotech Engng Div ASCE, VI03, NGT7, 1977, P711-724 Results of a finite element analysis of a reinforced earth wall on California Highway 39 are presented. The analysis uses a composite elasticity property of the steel reinforcing strip and soil. Reasonable agreement was obtained between predictions and measured stresses and horizontal deformations.
structures round the dtump, which attains a maximum width of about 500m and a height of 1520m. Toe-failure generally expands from the dump towards the forefield at an average rate of 6-7m/ds~v. The deformation rate varies with time, which is due to successive shifting of the dump front. Landslides and dislocation systems arise in the heaped masses.
781172 G~0PHYSICAL METHODS FOR THE INVESTIGATION OF LANDSLIDES Bogoslovsky, V A; Ogilvy, A A Geophysics, V42, N3, April 1977, P562-571 Electrical and seismic methods are used to obtain the information needed to determine slope stability. Experience has been gained from long-term investigations carried out in various regions of the USSR. Applications include evaluating geologic and hydrologic conditions related to the occurrence of landslides. Primary attention is devoted to the study of landslide slopes proper. The geologic structure of a landslide is considered in modeling it and determining the thickness of both the landslide body and the slip zone. Self-potential, resistivity, and temperature anomalies are associated with sites of increased landslide activity. Examples of geophysical investigations of landslides in the Crimea, on the Black Sea coast of the Caucasus, and in the Volga River Valley are presented. 781173 SKY EYE MONITORS TAILINGS DAMS Roth, L H; Cesare, J A; Allison, G S Coal Age, V82, N8, Aug 1977, P58-62 Discusses the use of a rapid monitoring system using convergent and vertical photography from conventional fixed wing aircraft. The system was tested on an active landslide and on 2 coal refuse facilities using both black and white colour infrared film. Field tests showed that the system was capable of accurate measurement while producing qualitative data through photointerpretion. 781174 PIT sLOPE MANUAL, SUPPLEMENT 2-3. GEOPHYSICS FOR OPEN PIT SITES Herget, G Canada Centre for Mineral and Energy Technology (CANMET) report 77-22, Sept 1977, 25P Reviews surface and borehole geophysical methods useful in evaluating the distribtuion of rock and soil types and of rock fractures at open pit sites. Emphasises inexpensive, do-ityourself methods for surface work and discusses in detail hammer seismic refraction surveys and electrical resistivity surveys. For borehole logging, describes types of equipment and considers possible benefits and costs of logging for open pit sltes. Avail: CANMET, 555 Booth St, Ottawa, Canada KIA OG1 781175 PIT SLOPE MANUAL, CHAPTER 3. MECHANICAL PROPERTIES Gyenge, M; Herget, G Canada Centre for Mineral and Energy Technology (CANMET) report 77-15, Aug 1977, 87P Discusses planning and execution of a test progrsame to determine shear strengths of material and discontinuities, compressive strength, and other mechanical properties,
statistical analysis of test data, and presentation of test results. Considers test programmes of the different development stages; feasibility, mine design and operation, and their costs, and gives some case histories. Avail: CANMET, 555 Booth St, Ottawa, Canada KIA OGI 781176 PIT SLOPE MANUAL, CHAPT~ 8. MONITORING Larocque, G Canada Centre for M i n ~ a l and Hhergy Technology (CANMET) report 77-15, Aug 1977, 188P Monitoring is divided into 3 levels. Level i is the overall n~nitoring of the walls, designed to locate areas of potential instability, Level 2 is the detailed monitoring of these potential instabilities and Level 3 the monitornlg of actual instabilities, when the pit wall cannot be st~bilised, to allow mining to continue with safety. The 3 levels are discussed in detail and monitoring by rock noise and by railways is also considered. Finally, data collection and presentation and telemetry and the data processing system are discussed. Appendices cover theodolites and EDM, levels, extensometers, inclinometers, inverted pendulums, rock bolt and cable dynamometers, a case history of telemetry system trials, a recommended telemetry system for open pit mines, an FM/FM telemetry system. Avail: C&NMF~, 555 Booth St, Ottawa, Canada KIA OGI
Earth retaining structures 781177 DESIGN AND FIELD BEHAVIOUR OF A REINFORCED EARTH WALL Chang, J C; Forsyth, R A J Geotech Engng Div ASCE, VI03, NGT7, 1977, P677-692 The design and field behaviour of the first reinforced wall in the United States are discussed. It is concluded that active earth pressure should be used for calculating the stresses in the front end portion of the reinforcement and its connection. The at rest earth pressure should be used in designing the central section of the reinforcement. The stresses in the skin plate can be analysed by assuming a hinged end. The vertical deformation of the skin plate on which the calculations are based is proportional to overburden pressure. 781178 FINITE ELL~4ENT ANALYSIS OF REINFORCED K~RTH WAL Chang, J C; Forsyth, R A J Geotech Engng Div ASCE, VI03, NGT7, 1977, P711-724 Results of a finite element analysis of a reinforced earth wall on California Highway 39 are presented. The analysis uses a composite elasticity property of the steel reinforcing strip and soil. Reasonable agreement was obtained between predictions and measured stresses and horizontal deformations.