SURVEILLANCE OF THE STABILITY OF AN EXCAVATION BY MEANS OF DEFORMATION MEASUREMENTS. SELECTION OF A WARNING METHOD

SURVEILLANCE DE LA STABILITE D'UNE EXCAVATION PAR DES MEASURES DE DEFORMATION - CHOIX D'UNE METHODE D'ALARME

The existence of natural excavations or excavations due to the exploitation of mineral resources requires the establishment of a surveillance system, the object of which is to foresee changes in stability and if necessary, to warn of imminent rock falls. This surveillance often takes the form of deformation measurements, the use of which remains to be defined. The method proposed is based on the occurrence of an acceleration in deformations just before a rock fall. Its object is to detect, through fluctuations in measurements, the general direction of the evolution and abnormal variations that are warning signs of the start of a failure. A computer program (the flow chart of which is presented) facilitates the processing of the measurements and could be used to set up an automated surveillance system. The method was tested on an iron mine where convergence measurements were carried out until final failure. Several stages of warning can be established from the evolution observed at 3 measuring stations. /TRRL/

  • Corporate Authors:

    Ministere de l'Industrie et de la Recherche

    19 rue du Grand Moulin
    420 29 Saint Etiene,   France 
  • Authors:
    • Josien, J P
  • Publication Date: 1977-3

Language

  • French

Media Info

  • Features: Figures; Photos;
  • Pagination: p. 51-62
  • Serial:
    • Annales des Mines
    • Volume: 183
    • Issue Number: 3
    • Publisher: Compagnie Francais d'Editions

Subject/Index Terms

Filing Info

  • Accession Number: 00188388
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Mar 28 1979 12:00AM