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Learning from nuclear waste repository design: the ground control plan
103A emphasised. Accumulated data are used to predict effects of rock property change, layout, or extraction plan on underground stability.
General underground storage 892418 Calculation of creep induced volume reduction of the Weeks Island SPR facility using 3-D finite element methods Preece, D S Key Questions in Rock Mechanics: Proc 29th US Symposium, Minneapolis, 13-15 June 1988 P343-350. Publ Rotterdam: A A Balkema, 1988 Closure of a crude oil storage facility in rock salt has been modelled. The room and pillar mine can be divided into 3 different categories according to depth and geometry, and a three dimensional finite element model is created to represent each category. Material properties were determined in the laboratory. Calculated and measured convergences are in good agreement.
Radioactive waste disposal 892419 Learning from nuclear waste repository design: the ground control plan Schmidt, B Bull Proc Aust inst Min Metall V293, N4, June 1988, P67-73 Three repositories are at the initial stages in the USA, in tuff, salt, and basalt, and a pilot plant in salt is under construction. Work on analysis of underground openings under unique repository conditions is being undertaken, which will increase overall knowledge of rockmass behaviour. The design concepts, time/temperature regime, and an overview of the ground control plan are examined. The role of numerical modelling in ground control, criteria for acceptability, the role of empirical design and monitoring are discussed,
892420 Measurements, calculations and stability prognoses at the SFR undersea repository for low- and medium-level nuclear waste Stille, H; Fredriksson, A Tunnlg Underground Space Technol V3, N3, 1988, P277-282
drilling semi-horizontal wells to inject steam and produce bitumen. Features of an underground test facility set up to test the method are described, including shaft construction, shaft liner, surface layout and underground layout. Geotechnical monitoring was used to study the effect of steam on the reservoir and adjacent strata.
Groundwater problems 892422 Prediction of minewater inflows Morton, K L; Bouw, P C; Connelly, R J J S Aft lnst Min Metali V88, N7. July 1988, P219-226 A procedure to assess potential groundwater inflows into mines has been developed using computer modelling techniques. The method uses interactive operation of 2 separate computer models, regional fl0w model and inflow model, both based on a nonlinear relation between area mined and inflow. Historical hydrogeological data were used for calibration. The method has been successfully applied to a new gold mine in South Africa.
892423 Keeping tunnels dry using plastic membranes Schlutter, A Tunn Tunnlg V20. NIO. Oct 1988. P39-41 Plastic waterproofing membrane is considered important for water protection in tunnel construction. Factors such as effect of water pressure, type of seal, and tunnel excavation method, and their influence on application of the membranes are considered. Technical procedures, including surface preparation, membrane securing and seam welding, are outlined.
Surface subsidence, caving and rockbursts See also: 892214 892424 Monitoring rockbutst-prone zones by manometricextensometric means (In German) Hahnekamp, H G Gluckauf-forschungsh V49, NS, Oct 1988, P215-220
Underground construction methods
Manometer and extensometer readings can aid identification of rockburst danger if the pressure probes within the highpressure zone ahead of the face are inserted under properly defined initial conditions. As the face approaches, any danger is shown by early and steep pressure rise of the probe. Manometer readings should be taken at different borehole depths to ensure pressure measurement is taken in the high pressure zone itself. The pressure measurements and Iocalised borehole deformation meter readings should be used together to ensure more reliable rockburst identification data.
892421 Underground mining and tunnelling techniques for in-situ oil recovery Stephenson, H G: Luhning, R W Tunn Tunnlg V20, N9, Sept 1988, P41-46
892425 Effect of topography on ground movement due to Iongwall mining Khair, A W; Quinn, M K: Chaffins, R D Min Engng V40, NS. Aug 1988, P820-822
Research into a technique to recover oil from the oil sands of Alberta is presented. Shaft and Tunnel Access Concept (SATAC) involves the construction of vertical wells from the surface and development of tunnels in the oil sands or surrounding strata. This network of tunnels may then be used for
A West Virginia mine was monitored using inclinometers and surveying with electronic distance meters, theodolites and levelling instruments. Results show topography to have a significant effect on mining induced horizontal ground movements, dictating damage inflicted to surface structures, but no effect
The repository at Forsmark, Sweden, was constructed in gneiss granite with amphibolite and pegmatite intrusions. The main silo is 69m high and 30m diameter. Extensive site investigation, including in situ stress measurement, was carried out, and finite element modelling of the structure undertaken. Deformations of the order of a few mm were monitored during excavation, in good agreement with analytical predictions.
'~ 1989 Pergamon Press plc. Reproduction not permitted
General underground storage 892418 Calculation of creep induced volume reduction of the Weeks Island SPR facility using 3-D finite element methods Preece, D S Key Questions in Rock Mechanics: Proc 29th US Symposium, Minneapolis, 13-15 June 1988 P343-350. Publ Rotterdam: A A Balkema, 1988 Closure of a crude oil storage facility in rock salt has been modelled. The room and pillar mine can be divided into 3 different categories according to depth and geometry, and a three dimensional finite element model is created to represent each category. Material properties were determined in the laboratory. Calculated and measured convergences are in good agreement.
Radioactive waste disposal 892419 Learning from nuclear waste repository design: the ground control plan Schmidt, B Bull Proc Aust inst Min Metall V293, N4, June 1988, P67-73 Three repositories are at the initial stages in the USA, in tuff, salt, and basalt, and a pilot plant in salt is under construction. Work on analysis of underground openings under unique repository conditions is being undertaken, which will increase overall knowledge of rockmass behaviour. The design concepts, time/temperature regime, and an overview of the ground control plan are examined. The role of numerical modelling in ground control, criteria for acceptability, the role of empirical design and monitoring are discussed,
892420 Measurements, calculations and stability prognoses at the SFR undersea repository for low- and medium-level nuclear waste Stille, H; Fredriksson, A Tunnlg Underground Space Technol V3, N3, 1988, P277-282
drilling semi-horizontal wells to inject steam and produce bitumen. Features of an underground test facility set up to test the method are described, including shaft construction, shaft liner, surface layout and underground layout. Geotechnical monitoring was used to study the effect of steam on the reservoir and adjacent strata.
Groundwater problems 892422 Prediction of minewater inflows Morton, K L; Bouw, P C; Connelly, R J J S Aft lnst Min Metali V88, N7. July 1988, P219-226 A procedure to assess potential groundwater inflows into mines has been developed using computer modelling techniques. The method uses interactive operation of 2 separate computer models, regional fl0w model and inflow model, both based on a nonlinear relation between area mined and inflow. Historical hydrogeological data were used for calibration. The method has been successfully applied to a new gold mine in South Africa.
892423 Keeping tunnels dry using plastic membranes Schlutter, A Tunn Tunnlg V20. NIO. Oct 1988. P39-41 Plastic waterproofing membrane is considered important for water protection in tunnel construction. Factors such as effect of water pressure, type of seal, and tunnel excavation method, and their influence on application of the membranes are considered. Technical procedures, including surface preparation, membrane securing and seam welding, are outlined.
Surface subsidence, caving and rockbursts See also: 892214 892424 Monitoring rockbutst-prone zones by manometricextensometric means (In German) Hahnekamp, H G Gluckauf-forschungsh V49, NS, Oct 1988, P215-220
Underground construction methods
Manometer and extensometer readings can aid identification of rockburst danger if the pressure probes within the highpressure zone ahead of the face are inserted under properly defined initial conditions. As the face approaches, any danger is shown by early and steep pressure rise of the probe. Manometer readings should be taken at different borehole depths to ensure pressure measurement is taken in the high pressure zone itself. The pressure measurements and Iocalised borehole deformation meter readings should be used together to ensure more reliable rockburst identification data.
892421 Underground mining and tunnelling techniques for in-situ oil recovery Stephenson, H G: Luhning, R W Tunn Tunnlg V20, N9, Sept 1988, P41-46
892425 Effect of topography on ground movement due to Iongwall mining Khair, A W; Quinn, M K: Chaffins, R D Min Engng V40, NS. Aug 1988, P820-822
Research into a technique to recover oil from the oil sands of Alberta is presented. Shaft and Tunnel Access Concept (SATAC) involves the construction of vertical wells from the surface and development of tunnels in the oil sands or surrounding strata. This network of tunnels may then be used for
A West Virginia mine was monitored using inclinometers and surveying with electronic distance meters, theodolites and levelling instruments. Results show topography to have a significant effect on mining induced horizontal ground movements, dictating damage inflicted to surface structures, but no effect
The repository at Forsmark, Sweden, was constructed in gneiss granite with amphibolite and pegmatite intrusions. The main silo is 69m high and 30m diameter. Extensive site investigation, including in situ stress measurement, was carried out, and finite element modelling of the structure undertaken. Deformations of the order of a few mm were monitored during excavation, in good agreement with analytical predictions.
'~ 1989 Pergamon Press plc. Reproduction not permitted