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Identification of underconsolidated zones in tailings with piesocone
234A
Monitoring rock and soil mass performance 866161 Sand. gravel and crushed rock aggregates for construction purposes Sims. I Q J Engng Geol vIg. N3, 1986. P325-338 A summary of the Geological Society Engineering Group Working Party report covering the most important aspects of natural and crushed rock aggregates used for construction purposes. The report is intended to provide basic information. serving as a reference. Sections covered include: occurrences and associations of aggregate sources: field mvestigations of deposits: extraction: processing; classification; sampling and testing; aggregates for concrete, mortars, in unbound pavement constructton, in bituminous bound construction materials, railway track ballast and for use as filter media.
866162 Use of a very-high-resolution tiltmeter for the study of the response of civil engineering structures (In French) Aste. J P: Blum. P A: Bordes. J L: Memier. B: Saleh. B Rev Fr Geotech N34, 1986, P57-67 A very high resolution tiltmeter, originally designed for the terrestial measurement of tidal waves, was used for the short term monitoring of the anchor block for the steel ropes of an overhead railway and a retaining wall. The tilting of the block under the loads applied to the block by movement ot" cars was measured with very high precismn. Despite variations due to temperature effects, the stability of the wall was demonstrated. Very high precision instruments appear to yield signiticant intbrmation on structures m short ume periods.
866163 Detection of yield and rupture of underground openings by displacement monitoring Maloney, S M; Kaiser. P K In: Research and Engineering Applications in Rock Masses (paper to the 26th US Symposium on Rock Mechanics, Rapid City, 26-28 June 1985) ~ . P957-966. Publ Rotterdam." A, el. Balkema. 1985 Laboratory model tests on small circular openings in a jointed. heterogeneous rock mass (coal) were used to examine the suitability of monitoring techniques to evaluate stability. Convergence rate during excavation is a function of the time de pendent properties of the rock and the rate of face advance. Expressions were established separating the two components and were verified by testing. The significance of these findings with respect to monitoring systems and the relevance of closure rates m excess of closure rate functions as predictors of failure are discussed.
866164 Some recent developments in vibrating wire rock mechanics instrumentation Dutta, P K In: Research and Engineering Applications in Rock Masses (paper to the 26th US Symposium on Rock Mechanics, Rapid City, 26-28 June 1985) V2, P1043-1054. Publ Rotterdam: el. A, Balkema. 1985 Vibrating wire instruments have many advantages in remote and long term geotechnical monitoring, as measurements are of mechanical rather than electrical properties. Some recent developments in stress meters, strain gauges, piezometers, load
cells, joint meters and temperature sensors arc described. The rock mechanical instrumentation problems in terms of scale of measurement, reliability and the uncertaint~ of analxtical models are discussed.
866 ! 65 Borehole instrument for measuring mining-induced pressure changes in underground coal mines Bauer. E R: Chekan. G J: Hill. J L In: Research and Engineering Applications in Rock Masses (paper to the 26th US Symposium on Rock Mechanics, Rapid City, 26-28 June 1985) V2. P1075-1084. Publ Rotterdam: A, A. Balkema. 1985 The Borehole Platened Flatjack (BPF) has been developed as an inexpensive.easily installed instrument to measure pressure changes m mine roofs and pillars. It consists of a copper flatjack between aluminium platens. It is calibrated in simulated coal or coal measures rock before installation, Laboratory tests show the BPF to be reliable and repeatable and that the relationship between gauge pressure and strata pressure is dependent on initial setting pressure, Field tests have demonstrated its usefulness. Up to three BPFs may be installed in a single borehole, permitting pressure change m more than one dircction to be measured
866166 Identification of underconsolidated zones in tailings with piezocone wm Zyl, D Proc Conj" on Updating Surface Samplings o f Soils and Rocks and their In-Situ Testing, Santa 8m'bara. California, 3-8 Jan 1982 P269-278. Puhl New York: Engineering Foumlation. t985 Thc piezocone was used etficientty and economically to identify zones of underconsolidated material in a platinum railings impoundment, by monitoring of pore pressure dissipation m the varying zones. The causes of such zones o f differing properties and the importance of their identification in ordcr to monitor the allowable rise of tailings dams are discussed.
Design Methods See also: 866021, 866022, 866089. 866090, 866098, 866099. 866101. 866167 Boundary element solutions for some problems in soil dynamics Tullberg, O; Wiberg. N E Proc 5th International Conference on Numerical ~lqethods in Geomechanics, Nagoya, 1-5 April 1985-VI. P157-164. Pub[ Rotterdam: A. A. Balkema. 1985 Boundary element solutions of some common problems encountered in soil dynamics are presented. The dynamic boundary element equations are derived outgoing from the Laplace transform of the elastodynamic differential equations. Only the plane strain case is studied. A few important details of the computer program BEMDYN. used in this study, are also commented on. Auth.
(), 1986 Pergamon Journals Ltd. Reproduction not permitted
Monitoring rock and soil mass performance 866161 Sand. gravel and crushed rock aggregates for construction purposes Sims. I Q J Engng Geol vIg. N3, 1986. P325-338 A summary of the Geological Society Engineering Group Working Party report covering the most important aspects of natural and crushed rock aggregates used for construction purposes. The report is intended to provide basic information. serving as a reference. Sections covered include: occurrences and associations of aggregate sources: field mvestigations of deposits: extraction: processing; classification; sampling and testing; aggregates for concrete, mortars, in unbound pavement constructton, in bituminous bound construction materials, railway track ballast and for use as filter media.
866162 Use of a very-high-resolution tiltmeter for the study of the response of civil engineering structures (In French) Aste. J P: Blum. P A: Bordes. J L: Memier. B: Saleh. B Rev Fr Geotech N34, 1986, P57-67 A very high resolution tiltmeter, originally designed for the terrestial measurement of tidal waves, was used for the short term monitoring of the anchor block for the steel ropes of an overhead railway and a retaining wall. The tilting of the block under the loads applied to the block by movement ot" cars was measured with very high precismn. Despite variations due to temperature effects, the stability of the wall was demonstrated. Very high precision instruments appear to yield signiticant intbrmation on structures m short ume periods.
866163 Detection of yield and rupture of underground openings by displacement monitoring Maloney, S M; Kaiser. P K In: Research and Engineering Applications in Rock Masses (paper to the 26th US Symposium on Rock Mechanics, Rapid City, 26-28 June 1985) ~ . P957-966. Publ Rotterdam." A, el. Balkema. 1985 Laboratory model tests on small circular openings in a jointed. heterogeneous rock mass (coal) were used to examine the suitability of monitoring techniques to evaluate stability. Convergence rate during excavation is a function of the time de pendent properties of the rock and the rate of face advance. Expressions were established separating the two components and were verified by testing. The significance of these findings with respect to monitoring systems and the relevance of closure rates m excess of closure rate functions as predictors of failure are discussed.
866164 Some recent developments in vibrating wire rock mechanics instrumentation Dutta, P K In: Research and Engineering Applications in Rock Masses (paper to the 26th US Symposium on Rock Mechanics, Rapid City, 26-28 June 1985) V2, P1043-1054. Publ Rotterdam: el. A, Balkema. 1985 Vibrating wire instruments have many advantages in remote and long term geotechnical monitoring, as measurements are of mechanical rather than electrical properties. Some recent developments in stress meters, strain gauges, piezometers, load
cells, joint meters and temperature sensors arc described. The rock mechanical instrumentation problems in terms of scale of measurement, reliability and the uncertaint~ of analxtical models are discussed.
866 ! 65 Borehole instrument for measuring mining-induced pressure changes in underground coal mines Bauer. E R: Chekan. G J: Hill. J L In: Research and Engineering Applications in Rock Masses (paper to the 26th US Symposium on Rock Mechanics, Rapid City, 26-28 June 1985) V2. P1075-1084. Publ Rotterdam: A, A. Balkema. 1985 The Borehole Platened Flatjack (BPF) has been developed as an inexpensive.easily installed instrument to measure pressure changes m mine roofs and pillars. It consists of a copper flatjack between aluminium platens. It is calibrated in simulated coal or coal measures rock before installation, Laboratory tests show the BPF to be reliable and repeatable and that the relationship between gauge pressure and strata pressure is dependent on initial setting pressure, Field tests have demonstrated its usefulness. Up to three BPFs may be installed in a single borehole, permitting pressure change m more than one dircction to be measured
866166 Identification of underconsolidated zones in tailings with piezocone wm Zyl, D Proc Conj" on Updating Surface Samplings o f Soils and Rocks and their In-Situ Testing, Santa 8m'bara. California, 3-8 Jan 1982 P269-278. Puhl New York: Engineering Foumlation. t985 Thc piezocone was used etficientty and economically to identify zones of underconsolidated material in a platinum railings impoundment, by monitoring of pore pressure dissipation m the varying zones. The causes of such zones o f differing properties and the importance of their identification in ordcr to monitor the allowable rise of tailings dams are discussed.
Design Methods See also: 866021, 866022, 866089. 866090, 866098, 866099. 866101. 866167 Boundary element solutions for some problems in soil dynamics Tullberg, O; Wiberg. N E Proc 5th International Conference on Numerical ~lqethods in Geomechanics, Nagoya, 1-5 April 1985-VI. P157-164. Pub[ Rotterdam: A. A. Balkema. 1985 Boundary element solutions of some common problems encountered in soil dynamics are presented. The dynamic boundary element equations are derived outgoing from the Laplace transform of the elastodynamic differential equations. Only the plane strain case is studied. A few important details of the computer program BEMDYN. used in this study, are also commented on. Auth.
(), 1986 Pergamon Journals Ltd. Reproduction not permitted