Ground conditions: who is responsible

Ground conditions: who is responsible

119A stability of the fill was critical and a comprehensive programme for monitoring was devised incorporating extensometers, inclinometers and piezom...

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119A stability of the fill was critical and a comprehensive programme for monitoring was devised incorporating extensometers, inclinometers and piezometers.

843370 Geoplanning for underground space Eriksson, L G Underground Space V7, N6, May-June 1983, P387-392

843366 Ground conditions: who is responsible Uff, J New Cie Engr N567, 24 Nov 1983, P24-2S

The objective of geoplanning is to identify the optimal site for the planned facility during the feasibility and design phase, to benefit from continuously increasing knowledge of geology during the construction phase and to maintain functional and environmental control during the operation and closure phase of an underground project.

The ICE (UK) launched its 'Conditions of contract for ground investigation' in 1983. This paper examines problems relating to contracts not fully solved by the new conditions. 843367 Main principles and methods of investigations of iwsitu rock masses Fishman, Y A; Ukhov, S B; Fadeev, A B Proc 5tk Congress of the lnternatiomal Society for Rock Mechanics, Melbourne, 10-15 April 1983 V1, PB69-B77. Publ Rotterdam: A. A. Balkema, 1983 The main principles of in situ investigations are: (1) simulation of the conditions of the foundation for which they are intended, (2) consideration of changes in properties of rock masses occurring during construction and operation, (3) consideration of the scale factor, (4) in situ tests should be accompanied by auxiliary investigations and (5) the scope and accuracy of investigation must be suited to the conditions of construction. Methods of investigating (1) deformation properties: modulus of deformation, coefficient of rebound and Poisson's ratio and (2) strength properties; compressive strength, tensile strength, triaxial compression strength and shear strength are discussed. 843368 Assessment of the groutability of disintegrated granites by means of hydrngeoiogical, engineering geological and geophysical field investigations Blinde, A; Koenzen, J P, Metzler, F; Hotzl, H; Merkler, G P Proc 5th Congress of the International Society for Rock Mechanics, Melbourne, 10-15 April 1983 V1, PBIOS-BI09. Pub/Rotterdam: A. A. Balkema, 1983 The permeability behaviour of a Carboniferous granitic complex showing all transitional stages from solid rock to granitic grus was established using in situ tests: fabric determination, optical soundings in boreholes, joint tracing, Lugeon tests, geoelectrical self-potential measurements and seismic experiments. When these results are combined with packer test results, characterization of the rock mass is more fully achieved and necessary grouting measures more economically assessed.

Planning, geotechnical and structural mapping 843369 Remote sensing for porphyry copper deposits in Southern Arizona Abrams, M J; Brown, D; Lepley, L; Sadowski, R Econ Geol V78, N4, June-July 1983, PS91-604 Data from the current Landsat multispectral scanners are compared with data acquired with an aircraft instrument simulating the new Landsat-4 thematic mapper. Three porphyry copper deposits are used as test sites to evaluate the spatial and spectral capabilities of both systems for the separation oflithologies, discrimination of hydrothermal alteration and structural mapping. Landsat data are useful for delineating areas of iron oxide on the surface but its limited spatial resolution hampers mapping of some critical geological relationships. The simulated thematic mapper however provides additional spectral bands and improved spatial resolution.

843371 Quantitative assessment of potential tunnel instability by extrapolation of rock mass discontinuity mapping Haines,A In: Rock Mechanics in the Design of Tmmels (papers to the Symposium, 26 August 1983) PI-5. Publ South Africa: ISRM South African National Group, 1983 A method for extending the use of rock mass discontinuity mapping by generating the structural patterns produced in any selected section or plan has been developed for computer use. By examining the interaction of the tunnel geometry with these generated patterns it is possible to determine the potential shape and size of unstable blocks of rock identified as kinematically feasible. Early estimates of tunnel support requirements can also be made for the various rock types and structural zones along the proposed tunnel route.

Core recovery, logging, probing, boring and sampiing See also: 843239 843372 Use of synthetic fracture logs derived from horchole geophysics to assess mine roof and floor quality. Technical note Kusznir, N J; Whitworth, K R lnt J Min Engug V1, N3, Oct 1983, P253-260 A new method has been developed to obtain rock strength data, in the form of synthetic fracture logs, from borehole logs. The method is less time consuming and expensive compared with conventional core logging. The technique has been incorporated into a computer software package called Rock Tec, used by the National Coal Board (UK). 843373 Methods for detection and characterization of reservoir rock, Deep Basins gas area, Western Canada Sneider, R M; King, H R; Hawkes, H E; Davis, T B J Pet Technol V35, NIO, Sept 1983, P172S-1734 Pore type has been used to classify reservoir rock in order to determine the potential for gas production. 843374 Study of sonic logging in a cased horehole Chang, S K; Everhart, A H J Pet Teclmol V35, NIO, Sept 1983, P1745-1750 Scale model laboratory tests and computer simulations were used to investigate the feasibility of sonic logging in a cased boreholc. 843375 Hydraulic ram method for obtaining 'undisturbed' core sampies from Quaternary cave sediments. Short communication Jenkinson, R D S; Gilbertson, D D; Griffin, C M Proc Geoi Assoc London V94, N2, 1983, P187-190