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3-D analysis of a group of piles in a multilayered soil submitted to a seismic field — comparisons with experiments
120A
the analysis is discussed. A site usually amplifies bedrock motion, but, in the neighbourhood of a structure, deamplification can occur. The results of such deamplification are considered.
Underground Excavations Geological factors of importance in underground excavations 873282 Utilizing geologic characterization techniques to evaluate an
873279 3-D analysis of a group of piles in a multilayered soil
unsaturated gold deposit for in situ mining
submitted to a seismic field - comparisons with experiments Chapel, F; Crepel, J M Proc 5th International Conference on Numerical Methods in Geomechanics, Nagoya, 1-5 April 1985 V2, P867-873. Publ Rotterdam: A. A. Balkema, 1985
Design (papers to the International Symposium on Application of Rock Characterisation Techniques in Mine Design, New Orleans, March 1986) P88-97. Publ Littleton: AIME, 1986
The study of the behaviour of a pile group in a multilayered soil subject to dynamic loading is proposed. The problem is transformed into a series of more tractable ones by the substructuring method. The piles are taken to be sufficiently slender to be modelled by beam elements and the soil response is a combination of the displacement fields due to the concentrated forces and moments applied at the centrelines of piles. Results will be compared with those from experiments on medium scale pile foundations.
Larson, W C; McCormick, T H In: Application of Rock Characterization Techniques in Mine
A primary objective of this study was to evaluate the effects of geologic structure such as jointing, fracturing, and faulting on the migration, detection, and containment of fluids for in situ mining. A fluid injection test was conducted at the Morning Star gold mine, San Bernardino County, California. Results show that characterisation of the joint system within the ore body is a key factor in understanding the direction and containment of fluid. The use of geologic characterisation methods at the macroscale is an example of the types of premining studies that would be required for determining the feasibility of in situ mining in an unsaturated deposit. 873283 Effect of geological environments and direction on behaviour of roof
873280 Dynamic response of offshore cylindrical shell tank on uneven elastic foundation
Ninomiya, K; Baba, S; Kajita, T Proc 5th International Conference on Numerical Methods in Geomechanlcs, Nagoya, 1-5 April 1985 V2, P875-882. Publ Rotterdam: A. A. Balkema, 1985 The soil-water-structure interaction is modelled for submerged and semi-submerged cylindrical tanks on a shallow sea bed with uneven properties and subject to dynamic forces by wave action. The soil is represented by a Winkler spring model and three different distributions of springs are used to describe three different distributions of soil properties. Dynamic response is evaluated by finite element analysis.
873281 Method for time-domain analysis of semi-finite foundationstructure-water systems
Shiojiri, H; Nakagawa, T T Proc 5th International Conference on Numerical Methods in Geomechanics, Nagoya, 1-5 April 1985 V2, P883-888. Publ Rotterdam: A. A. Balkema, 1985 A method of time domain analysis for structure-foundationwater interaction under seismic loading is proposed. The finite element method is used to describe the structure for the near field and the finite difference method for the far field. Numerical examples for linear problems are presented, and results agree with those from transmitting boundary methods and analytical solutions. Responses of structures with slip/separation of the base are examined. Comparison with the linear analysis demonstrates the importance of accounting for slip/separation in the response analysis of structures subjected to strong ground motion.
Lama, R D; Lamb, P; Griffiths, L; Jaggar, F E In: Application of Rock Characterization Techniques in Mine
Design (papers to the International Symposium on Application of Rock Characterisation Techniques in Mine Design, New Orleans, March 1986) Pl14-123. Publ Littleton: A[ME, 1986 Observations on the stability of roof as influenced by geological setting and the direction of drivage in relation to the major principal stress are presented, including actual observations on the behaviour of roadways driven at different directions. Model studies were conducted to examine the effect of change in material properties on stresses in ribs and roof, and their behaviour. It is concluded that direction has a major influence on the stability of roadways, especially when driven under weaker materials such as mudstone or laminated shales. 873284 Geologic and geotechnical controls on the stability of coal mine entries Kane, W F; Karmis, M In: Application of Rock Characterization Techniques in Aline Design (papers to the International Symposium on Application of Rock Characterisation Techniques in Mine Design, New Orleans, March 1986) P124-132. Publ Littleton: AIME, 1986 A detailed study of several mines in the southern Appalachian coalfields was undertaken in order to determine the most prominent geomechanical factors affecting roof stability, and to evaluate their influence in promoting unstable ground conditions. This was accomplished by identifying and mapping major geological and geomechanical features that could possibly be detrimental to coal mine roof within the region. Statistical processing by chi-squared and linear regression analysis, as well as analysis by the finite element method were used to determine the influence of geology and mine layout on roof stability. A simplified roof classification system was developed based on these parameters, which can be used to characterize and assess the stability of mine roof. The probability of a failure under given conditions can be determined by means of a Roof Rating Index based on the results of this research.
© 1987 Pergamon Journals Ltd. Reproduction not permitted
the analysis is discussed. A site usually amplifies bedrock motion, but, in the neighbourhood of a structure, deamplification can occur. The results of such deamplification are considered.
Underground Excavations Geological factors of importance in underground excavations 873282 Utilizing geologic characterization techniques to evaluate an
873279 3-D analysis of a group of piles in a multilayered soil
unsaturated gold deposit for in situ mining
submitted to a seismic field - comparisons with experiments Chapel, F; Crepel, J M Proc 5th International Conference on Numerical Methods in Geomechanics, Nagoya, 1-5 April 1985 V2, P867-873. Publ Rotterdam: A. A. Balkema, 1985
Design (papers to the International Symposium on Application of Rock Characterisation Techniques in Mine Design, New Orleans, March 1986) P88-97. Publ Littleton: AIME, 1986
The study of the behaviour of a pile group in a multilayered soil subject to dynamic loading is proposed. The problem is transformed into a series of more tractable ones by the substructuring method. The piles are taken to be sufficiently slender to be modelled by beam elements and the soil response is a combination of the displacement fields due to the concentrated forces and moments applied at the centrelines of piles. Results will be compared with those from experiments on medium scale pile foundations.
Larson, W C; McCormick, T H In: Application of Rock Characterization Techniques in Mine
A primary objective of this study was to evaluate the effects of geologic structure such as jointing, fracturing, and faulting on the migration, detection, and containment of fluids for in situ mining. A fluid injection test was conducted at the Morning Star gold mine, San Bernardino County, California. Results show that characterisation of the joint system within the ore body is a key factor in understanding the direction and containment of fluid. The use of geologic characterisation methods at the macroscale is an example of the types of premining studies that would be required for determining the feasibility of in situ mining in an unsaturated deposit. 873283 Effect of geological environments and direction on behaviour of roof
873280 Dynamic response of offshore cylindrical shell tank on uneven elastic foundation
Ninomiya, K; Baba, S; Kajita, T Proc 5th International Conference on Numerical Methods in Geomechanlcs, Nagoya, 1-5 April 1985 V2, P875-882. Publ Rotterdam: A. A. Balkema, 1985 The soil-water-structure interaction is modelled for submerged and semi-submerged cylindrical tanks on a shallow sea bed with uneven properties and subject to dynamic forces by wave action. The soil is represented by a Winkler spring model and three different distributions of springs are used to describe three different distributions of soil properties. Dynamic response is evaluated by finite element analysis.
873281 Method for time-domain analysis of semi-finite foundationstructure-water systems
Shiojiri, H; Nakagawa, T T Proc 5th International Conference on Numerical Methods in Geomechanics, Nagoya, 1-5 April 1985 V2, P883-888. Publ Rotterdam: A. A. Balkema, 1985 A method of time domain analysis for structure-foundationwater interaction under seismic loading is proposed. The finite element method is used to describe the structure for the near field and the finite difference method for the far field. Numerical examples for linear problems are presented, and results agree with those from transmitting boundary methods and analytical solutions. Responses of structures with slip/separation of the base are examined. Comparison with the linear analysis demonstrates the importance of accounting for slip/separation in the response analysis of structures subjected to strong ground motion.
Lama, R D; Lamb, P; Griffiths, L; Jaggar, F E In: Application of Rock Characterization Techniques in Mine
Design (papers to the International Symposium on Application of Rock Characterisation Techniques in Mine Design, New Orleans, March 1986) Pl14-123. Publ Littleton: A[ME, 1986 Observations on the stability of roof as influenced by geological setting and the direction of drivage in relation to the major principal stress are presented, including actual observations on the behaviour of roadways driven at different directions. Model studies were conducted to examine the effect of change in material properties on stresses in ribs and roof, and their behaviour. It is concluded that direction has a major influence on the stability of roadways, especially when driven under weaker materials such as mudstone or laminated shales. 873284 Geologic and geotechnical controls on the stability of coal mine entries Kane, W F; Karmis, M In: Application of Rock Characterization Techniques in Aline Design (papers to the International Symposium on Application of Rock Characterisation Techniques in Mine Design, New Orleans, March 1986) P124-132. Publ Littleton: AIME, 1986 A detailed study of several mines in the southern Appalachian coalfields was undertaken in order to determine the most prominent geomechanical factors affecting roof stability, and to evaluate their influence in promoting unstable ground conditions. This was accomplished by identifying and mapping major geological and geomechanical features that could possibly be detrimental to coal mine roof within the region. Statistical processing by chi-squared and linear regression analysis, as well as analysis by the finite element method were used to determine the influence of geology and mine layout on roof stability. A simplified roof classification system was developed based on these parameters, which can be used to characterize and assess the stability of mine roof. The probability of a failure under given conditions can be determined by means of a Roof Rating Index based on the results of this research.
© 1987 Pergamon Journals Ltd. Reproduction not permitted