REINFORCEMENT EFFECT AND ACTION OF PERPENDICULAR AND AND INCLINED ROOFBOLTS IN LAYERED ROCK FORMATIONS

MEASUREMENTS WERE MADE OF THE SAG AND THE STRAINS IN THE ROOF OF A SCALE MODEL REPRESENTING A SINGLE ROADWAY IN SEDIMENTARY ROCK; THE ROOF CONSISTS OF A NUMBER OF "HARD" LAYERS, ALTERNATING WITH "SOFT" LAYERS OF VARYING THICKNESSES AND LOW RIGIDITY, INTO WHICH ROOFBOLTS CAN BE INSTALLED EITHER PERPENDICULAR OR INCLINED TO THE ROOFLAYERS. THE REINFORCEMENT EFFECT OF ROOFBOLTING WAS DEDUCED FROM THE REINFORCEMENT FACTOR, CALCULATED FROM THE SAG AND PHOTOELASTIC STRAIN MEASUREMENTS. GOOD AGREEMENT IS SHOWN TO EXIST BETWEEN THE EXPERIMENTAL RESULTS AND THE THEORETICAL REINFORCEMENT ACTION OF ROOFBOLTING BASED ON A MATHEMATICAL MODEL. IT WAS SHOWN THAT INCLINED ROOFBOLTS ARE ALWAYS MORE EFFECTIVE THAN PERPENDICULAR ROOFBOLTS ESPECIALLY WHEN THE ROOF CONTAINS SOFT INTERCALATIONS. /AUTHOR/

  • Supplemental Notes:
    • Vol 2, No 4-11, PP 457-467, 7 FIG, 4 TAB, PHOTS, 18 REF
  • Authors:
    • Ham, F V
    • Tsur-lavie, Y
  • Publication Date: 1970

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Filing Info

  • Accession Number: 00236199
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 22 1972 12:00AM