MODEL STUDIES OF SUBSIDENCE AND GROUND MOVEMENT USING LASER HOLOGRAPHIC INTERFEROMETRY

Laser holographic interferometry is a method of remotely monitoring surface movement even on the surface of granular material in three dimensions, without the surface disturbances associated with instrument emplacement. In this study, models of longwall and room and pillar layouts were used to demonstrate the validity of the technique and to generate data as the parameters controlling displacement were varied. The effects of cavity size, depth and orientation and material elasticity, time and geologic structure on surface displacement were analyzed. Gelatin and sand were successfully used as model materials. The study demonstrated that laser holographic interferometry is a practical system with potential to examine complex structures such as multiple panel extraction in longwall, multiple seam extraction or extraction of seams associated with irregular geologic conditions which might otherwise be difficult to monitor.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00207624
• Corporate Authors:

  Pergamon Press, Incorporated

  Headington Hill Hall
  Oxford OX30BW,    
• Authors:
  • Park, Dongjoo
  • SUMMERS, D A
  • Aughenbaugh, N B
• Publication Date: 1977-11

Media Info

• Features: References;
• Pagination: p. 235-245
• Serial:
  • International Journal of Rock Mechanics and Mining Science
  • Volume: 14
  • Issue Number: 5-6
  • Publisher: Pergamon Press, Incorporated
  • ISSN: 0020-7624

Subject/Index Terms

• TRT Terms: Coal mines; Columns; Depth; Geology; Holography; Interferometers; Lasers; Mathematical models; Mechanical elasticity; Mineral dislocations; Mines; Rock mechanics; Sand; Seismicity; Structural settlement; Subsidence; Time
• Uncontrolled Terms: Models; Orientation
• Old TRIS Terms: Cavity channels; Gelatin; Geology (Soils); Laser applications
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00178099
• Record Type: Publication
• Source Agency: Engineering Index
• Files: TRIS
• Created Date: Sep 27 1978 12:00AM