@article {:2015:0253-9993:293,
title = "Pre-tightening effect of mine cable and its force calculation",
journal = "Journal of China Coal Society",
parent_itemid = "infobike://jccs/jccs",
publishercode ="jccs",
year = "2015",
volume = "40",
number = "2",
publication date ="2015-02-15T00:00:00",
pages = "293-300",
itemtype = "ARTICLE",
issn = "0253-9993",
url = "https://www.ingentaconnect.com/content/jccs/jccs/2015/00000040/00000002/art00008",
keyword = "cable, pre-tightening force, locking converting rate, installing tension",
abstract = "The pre-tightening force is a key index in bolting and anchoring engineering,because of its important influence on surrounding rock structures rigidity and anchorage group effect.The mechanism using ANSYS simulation and the cables pre-tightening course with mechanical
analysis was investigated.According to its installation and pre-tighten process,a series drag springs model was put forward for mechanical analysis,which includes surrounding rock,cable,anchor cup,and anchor wedge.The difference and connection of installing tension load and pre-tightening
force were analyzed in detail.Some formulas for pre-tightening force were deduced and demonstrated by a calculation example.The studies show that the bigger installing tension load,the softer rock,the longer free cable section and the better following performance of wedges,would lead to the
bigger pre-tightening force and the smaller converting loss rate.In the engineering application,the super-tension,replenish-tension,optimal length of free section,improved restriction mode and lag resin bolt,could be applied to realize high pre-tightening force anchoring and better support
efficiency.",
}