MODELLING OF SUBSIDENCE CAUSED BY LONGWALL MINING USING FINITE ELEMENT AND DISPLACEMENT DISCONTINUITY METHODS. PROCEEDINGS OF THE SIXTH INTERNATIONAL CONFERENCE ON NUMERICAL METHODS IN GEOMECHANICS, 11-15 APRIL 1988, INNSBRUCK, AUSTRIA. VOLUMES 1 - 3

Numerical techniques based on the finite element method and the displacement discontinuity method have been developed for predicting subsidence over longwall mine panels. A new approach based on history matching (back analysis) concept, called the "displacement approach" is presented. Material bulking due to roof collapse and subsequent failure of overlying strata is also introduced. A modified version of the displacement discontinuity method is used to simulate discrete cracks caused by mining in the overburden. The developed procedure has been verified by comparing predictions with published field observations at several mine panels. Here, the results for a mine with shallow overburden depth and for a deep mine located in northern West Virginia are presented. The study indicates that the shape and the magnitude of subsidence can be predicted reasonably well by simulating major mechanisms of roof collapse and crack propagation. (TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/906191809X
• Corporate Authors:

  AA Balkema

  P.O. Box 1675
  Rotterdam,   Netherlands  BR-3000
• Authors:
  • Siriwardane, H J
  • Amanat, J
• Publication Date: 1988

Media Info

• Features: References;
• Pagination: p. 1901-10
• Serial:
  • Publication of: Balkema (AA)
  • Publisher: AA Balkema

Subject/Index Terms

• TRT Terms: Conferences; Cracking; Failure; Finite element method; Forecasting; Ground settlement; Mathematical models; Mines
• ITRD Terms: 6471: Analysis (math); 8525: Conference; 5211: Cracking; 5520: Failure; 6490: Finite element method; 132: Forecast; 6473: Mathematical model; 5117: Mine; 5792: Settlement
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00492713
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• ISBN: 90-6191-809-X
• Files: ITRD, TRIS
• Created Date: Mar 31 1990 12:00AM