Subsidence from underground defects is an increasing problem, and effective preventive or corrective measures depend on knowing the mechanism causing the failure. Too often, however, the mechanism is ignored or diagnosed from the appearance of the ground surface, leading to routine indiscriminate treatment such as filling the depression or draining any water, which can be successful, ineffective, or harmful, depending on the mechanism involved. A number of types of openings are involved: open excavtions, leaking sewers and culverts, solution channels in limestones, enlarged joints, faults, mines, tunnels, porous lava, erosion caves, voids between boulders, and voids between large debris. The mechanisms responsible include stratum thinning (including consolidation, collapse, or plastic flow), chemical and biochenical action (including burning), lateral strain, loss of lateral support, collpase of an opening, and reveling or erosion. Various combinations of opening and mechanisms can produce similar effects, but the necessary corrective measures are often different. Moreover, subsidences due to other resemble those from openings. This paper briefly discusses these to show their similarities and differences. /Author/

Media Info

  • Media Type: Print
  • Features: Figures; References;
  • Pagination: pp 2-8
  • Monograph Title: Subsidence over mines and caverns, moisture and frost actions, and classification
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00158165
  • Record Type: Publication
  • ISBN: 0309025885
  • Files: TRIS, TRB
  • Created Date: Sep 28 1977 12:00AM