THEORY OF ROOF BOLTING

There is currently an unfulfilled need in the field of rock mechanics for a rational, easily used system of rock bolt design. During the late 1950s and early 1960s, Panek and Lang performed independent studies on the nature of rock bolt behavior. Panek, working with bolt action in flat, laminated mine roof strata, attributed support to both suspension and friction and concluded that reinforcement by friction is a complex function of mine geometry, bolt spacing, and load. Lang, working with bolted gravel beams, developed essentially the same conclusions and, in effect, generalized Panek's work. By taking these two theories a step further, it is shown that rock support is a function of the rock bolt's power to enforce mechanical continuity on the rock. By using equations from two-hinged arch theory, it is possible to relate load directly to beam strength with the parameters of conventional structural analysis--load, strength, and beam geometry. Tables can thus be prepared that compare beam thicknesses and an offset dimension with span length. An example of such a table is included in the paper. /Author/

Media Info

  • Media Type: Print
  • Features: Figures; References;
  • Pagination: pp 44-48
  • Monograph Title: Tunneling and underground structures
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00196628
  • Record Type: Publication
  • ISBN: 0309028299
  • Files: TRIS, TRB
  • Created Date: Aug 28 1979 12:00AM