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Keywords: doorstopper
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Proceedings Papers

Paper presented at the 11th ISRM Congress, July 9–13, 2007
Paper Number: ISRM-11CONGRESS-2007-233
... build-up, is the development of potentially extremely bad conditions in the roadways encircling the longwallpanel. The latter was the case in Svea Vest. The stress pattern has been measured in 4 locations in Svea Nord, using doorstoppers and 3D-cells. All the measurements indicate the same direction...
Proceedings Papers

Paper presented at the 7th ISRM Congress, September 16–20, 1991
Paper Number: ISRM-7CONGRESS-1991-114
... in-situ compressive strength doorstopper compressive strength estimation reservoir geomechanics strength length diameter ratio in-situ rock stress measurement Reservoir Characterization Rock Structure in-situ strength stress distribution shear fracture Upstream Oil & Gas...
Proceedings Papers

Paper presented at the 5th ISRM Congress, April 10–15, 1983
Paper Number: ISRM-5CONGRESS-1983-206
... Hauptspannungen fuehren. Dies wird fuer die "Doorstopper"-Methode anhand von Parameterstudien unter Verwendung anisotroper Spannungskonzentrationsfaktoren gezeigt. SYNOPSIS: Anisotropy of mechanical behaviour is a common feature of many crustal rocks. If this is neglected in the analysis of in situ stress...
Proceedings Papers

Paper presented at the 4th ISRM Congress, September 2–8, 1979
Paper Number: ISRM-4CONGRESS-1979-173
... techniques have been used, including borehole deformation gages and photo elastic discs. In 1965 the doorstopper method was introduced, and during the years 1965–68 numerous tests with different versions of the doorstopper were carried out. Even three dimensional measurements by means of measurements...
Proceedings Papers

Paper presented at the 4th ISRM Congress, September 2–8, 1979
Paper Number: ISRM-4CONGRESS-1979-146
... "Doorstopper" is a borehole device widely used for determining absolute stress. Discussion has been continuing regarding the proper data reduction procedures. The paper describes some new procedures for data analysis. Sommaire: La cellule de C.S.M. et le Verin Goodman sont deux dispositifs de me sure de...
Proceedings Papers

Paper presented at the 2nd ISRM Congress, September 21–26, 1970
Paper Number: ISRM-2CONGRESS-1970-005
... Summary Vertical and horizontal virgin stresses have been determined at four sites in three South African gold mines using the "doorstopper" technique. The sites were at depths ranging from 1,300 to 2,400 metres. The measured values of the vertical stresses agreed well with the theoretical...
Proceedings Papers

Paper presented at the 2nd ISRM Congress, September 21–26, 1970
Paper Number: ISRM-2CONGRESS-1970-137
... Summary The CSIR "doorstopper" rock stress measuring equipment was developed five years ago and during the past three years has been commercially available. "Doorstoppers" have, as a result, been used in Australia, Canada, Ghana, Germany, Italy, Spain, Sweden. Norway, Britain, Rhodesia, South...
Proceedings Papers

Paper presented at the 2nd ISRM Congress, September 21–26, 1970
Paper Number: ISRM-2CONGRESS-1970-147
... Summary This paper presents details of an investigation, conducted in South Africa, to determine the stresses in existing coal pillars by means of „doorstopper" measurements. The investigation was divided into two parts. Firstly, the accuracy of the "doorstopper" equipment, under...

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