IN-SITU PULL TESTING OF A YIELDABLE ROCK BOLT, ROOFEX
A recently introduced yielding rock bolt, trade name Roofex, appears to have the required energy absorbing component of a dynamic support system. According to the manufacturers specification, the Roofex bolts can yield 300 mm (or more) displacement while holding 80 kN pull load. In order to assess the performance of this support unit in situ, particularly in coal ribs, a series of in situ pull tests performed in one hard rock and two coal mines. The results show that, under conventional pull test loading conditions, Roofex yielding bolts perform very close to their claimed specifications., thus showing a potential for their use as the main energy absorbing component of a dynamic support system. Further studies are required to confirm the in situ performance of these bolts under dynamic loading conditions.
UGUR OZBAY ERICH NEUGEBAUER
Department of Mining Engineering, Colorado school of Mines Salzburg, Austria Atlas Copco Salzburg, Austria
国际会议
The 7th International Symposium on Rockburst and Seismicity in Mines(2009年第七届国际岩爆与微振动性学术研讨会)
大连
英文
1081-1090
2009-08-21（万方平台首次上网日期，不代表论文的发表时间）