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Structural effect in the mechanical behaviour of clay shale
82A 843010 Geotechnical properties of the Pnertollano oil shale Berzal, J L; Oteo, C S; Rodriguez-Ortiz, J M Proc 5th Congress of the International Society for Rock Mechanics, Melbourne, 10-15 April 1983 I1"1, PA87-A91. Publ Rotterdam: A. A. Balkema, 1983
843014 Elastic constants and tensile strength of anisotropic rocks Amadei, B; Rogers, J D; Goodman, R E Proc 5th Congress of the International Society for Rock Mechanics, Melbourne, 10-15 April 1983 VI, PA 189-A196. Publ Rotterdam: A. A. Balkema, 1983
A summary of the geomechanical data resulting from studies of the Puertollano oil shale deposit, Spain. The deposit, consisting of three seams interbedded with schists and sandstones and overlain with marls, appears as bedded material with close microcracks and fracture planes. The compressive strength is low (mean values of 44MN/sq m when loaded parallel to the bedding and 27MN/sq m when loaded normally) the mean tensile strength quite high (9MN/sq m) and the moduli of deformation medium to low (6MN/sq m).
A closed-form solution is proposed for the distribution of stresses and strains within a thin disc of anisotropic material loaded diametrically by a line or a strip load. This is then incorporated into a method to measure the elastic constants and the tensile strength of rocks that can be idealized as linearly elastic, homogeneous, orthotropic or transversely isotropic continua.
843011 Deformational and strength properties of the three structural varieties of carboniferous sandstones Kwasniewski, M Proc 5th Congress of the International Society for Rock Mechanics, Melbourne, 10-15 April 1983 V1, PAIO5-Al l5. Publ Rotterdam: A. A. Balkema, 1983 Triaxial tests were carried out on three structural varieties of quartzose carboniferous sandstones at confining pressures up to 60MPa, to determine: threshold and limit of linearity of longitudinal strain, ultimate strength, Young's modulus, strain at failure, ductility, mode of deformation, type of failure, fracture angle and angle of internal friction. The conditions of transition of the tested sandstone from brittle via the transitional to the ductile state were determined. Analysis of test results allowed consideration of the granulometric characteristics of the rocks as well as their porosity and mineral composition. 843012 Strength and deformation characteristics of soft sedimentary rock under repeated and creep loading Akai, K; Ohnishi, Y Proc 5th Congress of the International Society for Rock Mechanics, Melbourne, 10-15 April 1983 V1, PA121-A124. Publ Rotterdam: A. A. Balkema, 1983 To determine deformation, strength and behaviour of pore water pressure under quasi-static and cyclic loading, consolidated undrained triaxiai tests were applied to samples of a soft, saturated porous tuff with an unconfined compressive strength of 16MN/sq m. In addition, creep tests were carried out to determine the long-term strength. Under cyclic and creep loading the rate of strain greatly increased just before fracture. It was suggested that at the same intensity of applied load, a specimen under creep load failed more rapidly than one under cyclic load. 843013 Structural effect in the mechanical hehaviour of clay shale Sun, G; Zhou, g Proc 5th Congress of the International Society for Rock Mechanics, Melbourne, 10-15 April 1983 V1, PAI53-A155. Publ Rotterdam: A. A. Balkema, 1983 To study the influence of the extent of cutting by structural surfaces on rock mass mechanical properties, samples of low mechanical strength, high deformation, weathered phyllite were tested in a 24 hour load cycle. Results showed the mechanical strength and deformation of the rock mass to be closely related to the number of structural bodies contained in the test specimen.
843015 Standard laboratory testing for compacted shales Lovell, C W Proc 5th Congress of the International Society for Rock Mechanics, Melbourne, 10-15 April 1983 VI, PAI97-A202. Publ Rotterdam: A. A. Balkema, 1983 Where embankments are to be constructed of weak and nondurable rock eg shale, a recommended sequence of eight standard laboratory tests has been identified. Four tests are required to implement the Franklin classification: the Atterberg limits, the point load strength test, and the slake durability or the 5cycle slaking index. Tests to define compaction characteristics and design parameters include: moisture-density relations, compaction degradation, one dimensional compression and consolidated undrained triaxial tests on saturated samples. 843016 Needless stringency in sample preparation standards for laboratory testing of weak rocks Pells, PJ N, Ferry, M J Proc 5th Congress of the International Society for Rock Mechanics, Melbourne, 10-15 April 1983 VI, PA203-A207. Publ Rotterdam: A. A. Balkema, 1983 Comparative laboratory testing of Triassic Hawkesbury sandstone was carried out to evaluate the relative importance of currently recommended procedures for specimen preparation and testing of core samples of weak rocks. Results indicate that many of the recommendations relating to the measurement of unconfined strength, Young's modulus and Brazilian tensile strength are unnecessarily stringent. 843017 Regionalisation of the mechanical properties of rocks. A structural geostatistic approach (In French) Pineau, A; Thomas, A Proc 5th Congress of the International Society for Rock Mechanics, Melbourne, 10-15 April 1983 VI, PB23-B27. Publ Rotterdam: A. A. Balkema, 1983 The results of 482 uniaxial compression tests on samples of iron ore from Lorraine, France, indicated an interrelationship between the mechanical properties and the spatial position of the samples. The mechanical properties are 'regionalized' variables which are dependent on structural geostatistical analysis. The important spatial variations of the mechanical properties determine mechanical heterogeneities related to the geological structure and to the geochemical and structural 'regionalizations' of the examined iron ore. 843018 Structure and mechanical behaviour of a volcanic tuff Rippa, F; Vinale, F Proc 5th Congress of the International Society for Rock Mechanics, Melbourne, 10-15 April 1983 VI, PB33-B40, Publ Rotterdam: A. A. Balkema, 1983
843014 Elastic constants and tensile strength of anisotropic rocks Amadei, B; Rogers, J D; Goodman, R E Proc 5th Congress of the International Society for Rock Mechanics, Melbourne, 10-15 April 1983 VI, PA 189-A196. Publ Rotterdam: A. A. Balkema, 1983
A summary of the geomechanical data resulting from studies of the Puertollano oil shale deposit, Spain. The deposit, consisting of three seams interbedded with schists and sandstones and overlain with marls, appears as bedded material with close microcracks and fracture planes. The compressive strength is low (mean values of 44MN/sq m when loaded parallel to the bedding and 27MN/sq m when loaded normally) the mean tensile strength quite high (9MN/sq m) and the moduli of deformation medium to low (6MN/sq m).
A closed-form solution is proposed for the distribution of stresses and strains within a thin disc of anisotropic material loaded diametrically by a line or a strip load. This is then incorporated into a method to measure the elastic constants and the tensile strength of rocks that can be idealized as linearly elastic, homogeneous, orthotropic or transversely isotropic continua.
843011 Deformational and strength properties of the three structural varieties of carboniferous sandstones Kwasniewski, M Proc 5th Congress of the International Society for Rock Mechanics, Melbourne, 10-15 April 1983 V1, PAIO5-Al l5. Publ Rotterdam: A. A. Balkema, 1983 Triaxial tests were carried out on three structural varieties of quartzose carboniferous sandstones at confining pressures up to 60MPa, to determine: threshold and limit of linearity of longitudinal strain, ultimate strength, Young's modulus, strain at failure, ductility, mode of deformation, type of failure, fracture angle and angle of internal friction. The conditions of transition of the tested sandstone from brittle via the transitional to the ductile state were determined. Analysis of test results allowed consideration of the granulometric characteristics of the rocks as well as their porosity and mineral composition. 843012 Strength and deformation characteristics of soft sedimentary rock under repeated and creep loading Akai, K; Ohnishi, Y Proc 5th Congress of the International Society for Rock Mechanics, Melbourne, 10-15 April 1983 V1, PA121-A124. Publ Rotterdam: A. A. Balkema, 1983 To determine deformation, strength and behaviour of pore water pressure under quasi-static and cyclic loading, consolidated undrained triaxiai tests were applied to samples of a soft, saturated porous tuff with an unconfined compressive strength of 16MN/sq m. In addition, creep tests were carried out to determine the long-term strength. Under cyclic and creep loading the rate of strain greatly increased just before fracture. It was suggested that at the same intensity of applied load, a specimen under creep load failed more rapidly than one under cyclic load. 843013 Structural effect in the mechanical hehaviour of clay shale Sun, G; Zhou, g Proc 5th Congress of the International Society for Rock Mechanics, Melbourne, 10-15 April 1983 V1, PAI53-A155. Publ Rotterdam: A. A. Balkema, 1983 To study the influence of the extent of cutting by structural surfaces on rock mass mechanical properties, samples of low mechanical strength, high deformation, weathered phyllite were tested in a 24 hour load cycle. Results showed the mechanical strength and deformation of the rock mass to be closely related to the number of structural bodies contained in the test specimen.
843015 Standard laboratory testing for compacted shales Lovell, C W Proc 5th Congress of the International Society for Rock Mechanics, Melbourne, 10-15 April 1983 VI, PAI97-A202. Publ Rotterdam: A. A. Balkema, 1983 Where embankments are to be constructed of weak and nondurable rock eg shale, a recommended sequence of eight standard laboratory tests has been identified. Four tests are required to implement the Franklin classification: the Atterberg limits, the point load strength test, and the slake durability or the 5cycle slaking index. Tests to define compaction characteristics and design parameters include: moisture-density relations, compaction degradation, one dimensional compression and consolidated undrained triaxial tests on saturated samples. 843016 Needless stringency in sample preparation standards for laboratory testing of weak rocks Pells, PJ N, Ferry, M J Proc 5th Congress of the International Society for Rock Mechanics, Melbourne, 10-15 April 1983 VI, PA203-A207. Publ Rotterdam: A. A. Balkema, 1983 Comparative laboratory testing of Triassic Hawkesbury sandstone was carried out to evaluate the relative importance of currently recommended procedures for specimen preparation and testing of core samples of weak rocks. Results indicate that many of the recommendations relating to the measurement of unconfined strength, Young's modulus and Brazilian tensile strength are unnecessarily stringent. 843017 Regionalisation of the mechanical properties of rocks. A structural geostatistic approach (In French) Pineau, A; Thomas, A Proc 5th Congress of the International Society for Rock Mechanics, Melbourne, 10-15 April 1983 VI, PB23-B27. Publ Rotterdam: A. A. Balkema, 1983 The results of 482 uniaxial compression tests on samples of iron ore from Lorraine, France, indicated an interrelationship between the mechanical properties and the spatial position of the samples. The mechanical properties are 'regionalized' variables which are dependent on structural geostatistical analysis. The important spatial variations of the mechanical properties determine mechanical heterogeneities related to the geological structure and to the geochemical and structural 'regionalizations' of the examined iron ore. 843018 Structure and mechanical behaviour of a volcanic tuff Rippa, F; Vinale, F Proc 5th Congress of the International Society for Rock Mechanics, Melbourne, 10-15 April 1983 VI, PB33-B40, Publ Rotterdam: A. A. Balkema, 1983