236A 876159 Laboratory determination of the in-situ stress tensor Thiercelin, M J; Hudson, P J; Ren, N K; Roegiers, J C Prae International Symposium on Engineering in Complex Rock Formations, Beijing, 3-7 November, 1986 P278-283. Publ Beijing: Science Press, 1986 Core specimens drilled and obtained from soft deep formations usually exhibit a large amount of oriented cracks. These microcracks, if not preexisting in the formation, are attributed to stress relaxation during coring and can be used as a fingerprint to obtain indications on the in situ state of stress. Two techniques are proposed to obtain information on the in situ stress tensor. A field study is presented which provides a good validation of the methods. Auth.
Site Investigation and Field O rvation See also: 876054, 876062, 876310, 876326. 876388 876160 Site investigation for USAF weapon effects tests Lockhart, R J; Logan, J W Bull Assoc Engng Geol I:24, NI, Feb 1987, P83-92 Because of political and environmental considerations, most weapons effects tests are carried out at remote desert sites. It is necessary to select a site whose properties reflect those of the potential target area. Typical site investigations begin with a literature review of available geotechnical data, geophysical surveying, test pit and borehole sampling and logging, conventional and special laboratory tests and an explosive in situ material properties test. The unique geotechnical and geologic data requirements associated with each phase of the weapons effect test site investigation are discussed with reference to a specific site. 876161 Temperature anomalies over underground cavities Moscicki, W J
Geoptiys Prospect V35, N4, May 1987, P393-423 Theoretical and practical aspects of a new method for cavity location, based on shallow temperature measurements, are presented. Results from finite difference analyses indicate possible origins of the anomalies. Field measurements and theoretical predictions of temperature anomalies are in good agreement. The advantages and drawbacks of this technique, which can complement the commonly use geophysical methods, are discussed. 876162 Application of complex geological and geophysical methods for evaluation of rock masses as foundations for waterworks Moulina, A V; Lavrova, L D
study the distribution of mechanical properties within the rock mass. Investigation of a complex, weathered rock mass in t;'~e Katun River valley, USSR, is described. 876163 Pumped-storage schemes in tectonically deteriorated rock Matula, M; Ondrasik, R; Wagner, P; Matejcek. A Proc 5th International Congress International Association of Engineering Geology, Buenos Aires, 20-25 October 1986 VI, P199-205. Publ Rotterdam: A .4 Balkema. 1986 In large areas of the Czechoslovak Carpathian mountains, the crystalline rocks are tectonically disturbed, with deep weathering and alteration in joints. Exploration work to find a suitable site for a pumped storage project is described. Initial work to classify the lithogenic conditions and tectonic history of the rock environment enabled better understanding of local geological conditions, more efficient understanding of site investigation data, easier siting of excavations, and a more efficient project design program.
Remote sensing and photographic techniques 876164 Geogas detection aids Boliden in its search for hidden ore Engng Min J V188, N4, April 1987. P56-57 The geogas detection technique uses inverted funnels containing measuring membranes to trap microflows of gas ascending from depth to the earth's surface. Analysis of elements registered on the membrane is expected to yield indications of areas with anomalously high base metal or gold content. It will be used to screen results from airborne geophysical surveys and eliminate anomalies caused solely b y ~aphite or pyrite: Case studies from Sweden and Saudi Arabia are described. 876165 Remote sensing for mineral exploration in Australia Horsfatl, C Aust Min V79, N3, March 1987, P23-31 Developments in remote sensing have improved the quality and quantity of information that can be derived from remotely imaged data. and techniques that map previously unrecognised geological features and rock alteration patterns are available. Techniques and instruments used in Australia include: advanced very high resolution radiometer (AVHRR); heat capacity mapping radiometer (HCMR); Landsat multispectral scanner (MSS); Landsat thematic mapper (TM); high resolution visible imagery; shuttle imaging radar (SIR); airborne TM; airborne MSS; multispectral electro-optical imaging scanner (MEIS); airborne imaging spectrometer (AIS); thermal infrared multispectral scanner (TIMS); and thematic mapper simulator (TMS). Scope, research, and the future for these instruments are considered. 876166
Proc 5th International Congress Imernatimml Assoeiatio~ of Engi~eri~4[ Geolagy, Buenos Aires, 20-25 October 1986 V1, P53-58. Publ Rotterdam: A A Balkema, 1986
Remote sensing aEplicatioasin hydrology
Foundation site investigation for hydraulic structures is carfled out using a combination of methods, geological surveying, exploration drilling and excavation, laboratory tests, and hydrogeological and geophysical studies. The most used geophysical methods in the initial stages employ magnetic, seismic, and electrical techniques. Seismo-acoustics is later used to
Recent developments in the application of remote sensing to hydrology are reviewed. Passive (radiometry) and active (radar) techniques to determine soil moisture are described, together with measurements of soil temperature and evapotranspiration. Satellite observations are also considered. 120 refs.
Schmugge, T Rev Geopkys V25, N2, March 1987, P148-152
,~ 1987 Pergamon Journals Ltd. Reproduction not permitted