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Measuring fracture orientation at exposed rock faces by using a non-reflector total station
KTH, Superseded Departments, Land and Water Resources Engineering.
2001 (English)In: Engineering Geology, ISSN 0013-7952, E-ISSN 1872-6917, Vol. 59, no 1-2, 133-146 p.Article in journal (Refereed) Published
Abstract [en]

Measurements of fracture orientation are usually taken by using a compass-inclinometer device on exposed rock faces. The drawbacks when using this method is that it is time-consuming if many fractures are measured and that measurement might be impossible if the rock face cannot be safely reached physically. To improve field mapping of rock fractures, a method for applying a non-reflector total station to measuring fracture orientation is presented in this paper. A non-reflector total station is a geodetic device that captures three-dimensional co-ordinates of target points without using a reflector. Therefore, physical touching the rock surfaces is no longer required. To determine a fracture orientation, co-ordinates of a set of points on the exposed fracture surface are captured at a distance from the rock face. The best-fit plane of the exposed fracture surface is defined by the co-ordinates of the target points, and the orientation (e.g. dip angle and dip direction) of the fracture surface is determined as that of its best-fit plane. This paper presents the technical procedure and a portable system designed for the field mapping of fracture orientation. Results of a case study performed at an exposed rock face are also included.

Place, publisher, year, edition, pages
2001. Vol. 59, no 1-2, 133-146 p.
Keyword [en]
fracture orientation, dip angle, dip direction, non-reflector total station, three-dimensional, co-ordinates, exposed rock faces
URN: urn:nbn:se:kth:diva-20366ISI: 000166953000008OAI: diva2:339061
QC 20100525Available from: 2010-08-10 Created: 2010-08-10Bibliographically approved

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Jing, Lanru
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