SEISMIC PROSPECTING METHODS

METHODES D'AUSCULTATION SISMIQUE

In connection with the measurements carried out during the construction of the Bourse Experimental Gallery, the "Compagnie de Prospection Geophysique Francaise" (the French Geophysical Exploration Company) conducted some non- destructive dynamic tests. A seismic prospecting device was positioned in boreholes in front of the drilling face and 20 series of measurements were made over 7 months. They showed the influence of drilling machines on rocks. Beyond A decompressed zone there exists a compressed ring, the characteristics of which improve up to a 5-diameter heading and remain even after 7 months. Tests on samples enabled formulae to be derived for forecasting average stress values. /TRRL/

• Corporate Authors:

  Comite Francais de Mecanique des Roches

  Rue du Grand Moulin 19
  Saint Etienne,   France 
• Authors:
  • Lakshmanan, J
• Publication Date: 1973-7-15

Language

• French

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 33-41
• Serial:
  • Issue Number: 5

Subject/Index Terms

• TRT Terms: Boreholes; Drilling; Drilling machines; Equipment; Measurement; Methodology; Rocks; Seismicity; Stresses; Surveying
• Uncontrolled Terms: Site investigation
• Old TRIS Terms: Drilling equipment; Seismic (Prospect); Seismic properties
• ITRD Terms: 5711: Bore hole; 7151: Decomposition; 3674: Equipment; 6136: Measurement; 4154: Rock; 5731: Seismic; 5722: Site investigation; 5408: Speed; 5575: Stress (in material); 6255: Test; 3374: Tunnel
• Subject Areas: Geotechnology; Highways; I41: General Soil Surveys;

Filing Info

• Accession Number: 00129652
• Record Type: Publication
• Source Agency: Central and Regional Labs of Bridges & Highways,Fr
• Files: ITRD, TRIS
• Created Date: Apr 7 1976 12:00AM