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Design of underground supports for high-level nuclear waste repositories
59A 901471 Automated ground support systems in deep metal mines Dupree, P D Proc 6th Annual Workshop Generic Mineral Teclmology Center Mite Systems Design and Ground Control, Fairbanks, 31 July-2 August 1988 P147-153. Publ Blacksburg: Virginia Polytechnic Institute and State Unicersity, 1988
901475 Design of underground supports for high-level nuclear waste repositories Sands, P F Proc Symposium on Rock Mechanics and Power Plants, Madrid, 12-16 September 1988 VI, P589-597. Publ Rotterdam: A A Balkema, 1988
Multi-institutional research on ground control in areas of high stress and rockburst is described with reference to the Lucky Friday Underhand Longwall (LFUL) project. Raise bored shafts can only be sunk when the mine is not in production, because of danger caused by induced seismicity. Shotcrete lining is used for these shafts. The manual systems previously used for shaft lining, and the automated remote systems developed to improve safety are described.
A review of design considerations for nuclear waste repositories shows that wide variations are possible in the host rock, in situ stress fields and hydrology, that these values are difficult to measure, rock supports vary in strength, and mathematical models vary in accuracy. A statistical approach to design based on a normal distribution curve is outlined and a hypothetical calculation presented. The applicability of using conventional rock supports in waste repositories is discussed, and some designs suggested.
Radioactive waste disposal 901472 Thermal-mechanical analysis of an underground facility for nuclear waste burial in a gneissie formation Vieira, A Proc Symposium on Rock Mechanics and Power Plants, Madrid, 12-16 September 1988 VI, P607-612. Publ Rotterdam: A A Balkema, 1988 An analytical solution for the evaluation of thermal and mechanical behaviour of a rock mass used as a high level waste store is presented. The model allows for thermally induced stress and strain, and storage energy decay with time. The model is then applied to simulate expected Brazilian conditions, estimating type of radioactive waste and geomechanical features of gneissic rock.
901473 Storage of nuclear waste in Sweden Bjurstrom, S Tuanlg Underground Space Technol V4. N2, 1989, P139-142 The Swedish program for radioactive waste management is described: sea transportation system, interim storage facility for spent fuel, and repositories for low to medium and high level wastes. The repositories are situated in crystalline gneiss granite bedrock beneath the Baltic sea near Forsmark, with a rock cover of about 60m. Storage is in copper canisters in silos in boreholes or caverns. The rock mass, bentonite buffer and the canisters form three retardant layers. A hydraulic cage isolates the waste from the groundwater. Research and development at Stripa mine is briefly described.
901474 Site investigations for the Swedish undersea repository for reactor waste Carlsson, A: Christiansson, R Proc Symposium on Rock Mechanics and Power Plants, Madrid, 12-16 September 1988 VI, t'561-569. Publ Rotterdam: A A Balkema, 1988 Initial investigations for the Swedish Final Repository included seismic surveys and in situ stress measurement, leading to a conceptual model of the rock mass. Subsurface investigations and engineering geological techniques are outlined, along with a summary of the derived geological and hydrogeological data. Practical applications of the investigation programme are presented.
901476 Accounting for excavation responses in developing an underground repository in argillaceous formations Bonne, A A Proc NEA Workshop on Excavation Response in Geological Repositories for Radioactive Waste, Winnipeg, 26-28 April 1988 P29-45. Publ France: OECD, 1989 The construction of radioactive waste repositories in argillaceous rocks is considered. Design considerations, such as strength and initial deformation characteristics, and mining methods are outlined. Excavation effects include convergence, fracturing and pore pressure dissipation. Longterm performance considerations suggest these effects are not significant if their extent and intensity are kept within limits. In situ tests related to excavation response are outlined. 901477 Accounting for excavation responses in developing an underground repository in hard crystalline rock Simmons, G R Proc NEA Workshop on Excavation Response in Geological Repositories for Radioactive Waste, Winnipeg, 26-28 April 1988 P47-66. Publ France: OECD, 1989 Many countries are considering disposal of radioactive waste deep in stable hard crystalline rock. During repository excavation, an excavation disturbed zone (EDZ) will be created due to the excavation method and stress redistribution around the opening. The possible effects of this zone on operational and post-closure safety of repositories are discussed. Research should take place into the mechanisms of the processes creating the EDZ both by measurement and modelling. Existing or planned research in Sweden, USA and Switzerland is described. 901478 Investigations of excavation effects at the Asse salt mine Brewitz, W; Kuhn, K; Schmidt, M W Proc NEA Workshop on Excavation Response in Geological Repositories for Radioactive Waste, Winnipeg, 26-28 April 1988 P67-86. Publ France: OECD. 1989 A disused salt mine has been studied to assess the potential for radioactive waste disposal. Convergence measurement and pillar deformation monitoring were carried out in and around old mine workings. Microseismic monitoring of the area confirmed the concentration of rock falls in the central stoping area where creep rates in pillars and convergence are highest. In situ stress measurements, using mainly hydraulic fracturing, were conducted below 750m. A prototype cavern was excavated at 979m for field testing and analysis of a disposal method. The rock mechanical conditions below 800m are less complex and therefore more favourable.
© 1990 Pergamon Press pie. Reproduction not permitted
901475 Design of underground supports for high-level nuclear waste repositories Sands, P F Proc Symposium on Rock Mechanics and Power Plants, Madrid, 12-16 September 1988 VI, P589-597. Publ Rotterdam: A A Balkema, 1988
Multi-institutional research on ground control in areas of high stress and rockburst is described with reference to the Lucky Friday Underhand Longwall (LFUL) project. Raise bored shafts can only be sunk when the mine is not in production, because of danger caused by induced seismicity. Shotcrete lining is used for these shafts. The manual systems previously used for shaft lining, and the automated remote systems developed to improve safety are described.
A review of design considerations for nuclear waste repositories shows that wide variations are possible in the host rock, in situ stress fields and hydrology, that these values are difficult to measure, rock supports vary in strength, and mathematical models vary in accuracy. A statistical approach to design based on a normal distribution curve is outlined and a hypothetical calculation presented. The applicability of using conventional rock supports in waste repositories is discussed, and some designs suggested.
Radioactive waste disposal 901472 Thermal-mechanical analysis of an underground facility for nuclear waste burial in a gneissie formation Vieira, A Proc Symposium on Rock Mechanics and Power Plants, Madrid, 12-16 September 1988 VI, P607-612. Publ Rotterdam: A A Balkema, 1988 An analytical solution for the evaluation of thermal and mechanical behaviour of a rock mass used as a high level waste store is presented. The model allows for thermally induced stress and strain, and storage energy decay with time. The model is then applied to simulate expected Brazilian conditions, estimating type of radioactive waste and geomechanical features of gneissic rock.
901473 Storage of nuclear waste in Sweden Bjurstrom, S Tuanlg Underground Space Technol V4. N2, 1989, P139-142 The Swedish program for radioactive waste management is described: sea transportation system, interim storage facility for spent fuel, and repositories for low to medium and high level wastes. The repositories are situated in crystalline gneiss granite bedrock beneath the Baltic sea near Forsmark, with a rock cover of about 60m. Storage is in copper canisters in silos in boreholes or caverns. The rock mass, bentonite buffer and the canisters form three retardant layers. A hydraulic cage isolates the waste from the groundwater. Research and development at Stripa mine is briefly described.
901474 Site investigations for the Swedish undersea repository for reactor waste Carlsson, A: Christiansson, R Proc Symposium on Rock Mechanics and Power Plants, Madrid, 12-16 September 1988 VI, t'561-569. Publ Rotterdam: A A Balkema, 1988 Initial investigations for the Swedish Final Repository included seismic surveys and in situ stress measurement, leading to a conceptual model of the rock mass. Subsurface investigations and engineering geological techniques are outlined, along with a summary of the derived geological and hydrogeological data. Practical applications of the investigation programme are presented.
901476 Accounting for excavation responses in developing an underground repository in argillaceous formations Bonne, A A Proc NEA Workshop on Excavation Response in Geological Repositories for Radioactive Waste, Winnipeg, 26-28 April 1988 P29-45. Publ France: OECD, 1989 The construction of radioactive waste repositories in argillaceous rocks is considered. Design considerations, such as strength and initial deformation characteristics, and mining methods are outlined. Excavation effects include convergence, fracturing and pore pressure dissipation. Longterm performance considerations suggest these effects are not significant if their extent and intensity are kept within limits. In situ tests related to excavation response are outlined. 901477 Accounting for excavation responses in developing an underground repository in hard crystalline rock Simmons, G R Proc NEA Workshop on Excavation Response in Geological Repositories for Radioactive Waste, Winnipeg, 26-28 April 1988 P47-66. Publ France: OECD, 1989 Many countries are considering disposal of radioactive waste deep in stable hard crystalline rock. During repository excavation, an excavation disturbed zone (EDZ) will be created due to the excavation method and stress redistribution around the opening. The possible effects of this zone on operational and post-closure safety of repositories are discussed. Research should take place into the mechanisms of the processes creating the EDZ both by measurement and modelling. Existing or planned research in Sweden, USA and Switzerland is described. 901478 Investigations of excavation effects at the Asse salt mine Brewitz, W; Kuhn, K; Schmidt, M W Proc NEA Workshop on Excavation Response in Geological Repositories for Radioactive Waste, Winnipeg, 26-28 April 1988 P67-86. Publ France: OECD. 1989 A disused salt mine has been studied to assess the potential for radioactive waste disposal. Convergence measurement and pillar deformation monitoring were carried out in and around old mine workings. Microseismic monitoring of the area confirmed the concentration of rock falls in the central stoping area where creep rates in pillars and convergence are highest. In situ stress measurements, using mainly hydraulic fracturing, were conducted below 750m. A prototype cavern was excavated at 979m for field testing and analysis of a disposal method. The rock mechanical conditions below 800m are less complex and therefore more favourable.
© 1990 Pergamon Press pie. Reproduction not permitted