HOW THE ROCK STUD TENSIONER FOUND ITS WAY INTO THE MINING INDUSTRY

ROCK STUD TENSIONERS HAVE BECOME STANDARD UNDERGROUND EQUIPMENT IN MOST MINES. IF ROCK BOLTS OR ROCK STUDS ARE USED UNDERGROUND, IT IS ESSENTIAL THAT THEY BE TENSIONED CORRECTLY AND UNIFORMLY. TO ACHIEVE THIS UNIFORMITY, THE MINING ENGINEER HAS ACCEPTED THE FACT THAT A HYDRAULIC TENSIONER MUST BE USED. A REVIEW IS PRESENTED OF PREVIOUS ATTEMPTS TO PROPERLY TENSION ROCK BOLTS OR STUDS. THE FIRST MECHANICAL ROCK STUD TENSIONING DEVICE WAS DEVELOPED IN 1961 BY BATEMAN. THIS UNIT CONSISTED OF A COARSE THREADED FEED SCREW CARRYING A LARGE NUT WHICH TWISTED AGAINST A PEDESTAL BY MEANS OF A THRUST BEARING. A SLIPPING CLUTCH WAS INCORPORATED IN AN IMPROVED DEVICE. IN 1967, BATEMAN DEVELOPED IN SOUTH AFRICA A HYDRAULIC TENSIONING UNIT. IN ADDITION, BATEMAN ALSO DEVELOPED A TENSIONER WHICH CAN BE EFFECTIVELY USED ON HIGH SPEED DEVELOPMENT WORK AND WHICH MAKES USE OF NORMAL MINE AIR FOR THE PURPOSE OF INSTALLING ROCK STUDS. THIS TENSIONER CONSISTS OF AN AIR BOOSTER TO OPERATE THE HYDRAULIC RAM. APPLICATIONS OF THIS TENSIONER SHOULD FIND THEIR USE FOR POST AND PRE-STRESSING STEEL REINFORCING RODS AND THE INSTALLATION OF ANCHOR BOLTS.

  • Supplemental Notes:
    • Reprint, 8 FIG
  • Corporate Authors:

    Coal, Gold & Base Minerals /S Africa

    ,    
  • Authors:
    • Thiel, P
  • Publication Date: 1968-3

Subject/Index Terms

Filing Info

  • Accession Number: 00215161
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 9 1994 12:00AM