摘要
预应力在锚索支护中起着非常重要的作用,但是现场工程实践中存在锚索预应力损失现象,在潞安漳村矿进行了锚索预应力损失试验,得出锚索长度、直径、张拉程度、张拉机具、锚具以及煤岩体等因素均对锚索预应力损失产生影响,并提出相应解决方法,超张拉25%,以保证锚索预应力能够满足设计需求。
Pre-stress plays an important role on anchored cable supporting, but in engineering practice, there was pre-stress loss. Pre- stress loss test was done in Zhangcun Colliery, the conclusion that anchored cable length, diameter, tension degree, tension device, anchored device and coal and rock property influenced pre-stress loss. Dissolving method was put forward, that is, anchored cable was supernormally tensioned to 25% , and pre-stress could meet design requirement.
出处
《煤矿开采》
北大核心
2013年第4期62-64,共3页
Coal Mining Technology
基金
国家自然科学基金委员会与神华集团有限责任公司联合资助项目(U1261211)
国家国际科技合作项目(2010DFB73070)
天地科技"公司研发项目"(KJ-2012-TDKC-03)
关键词
矿用锚索
预应力损失
超张拉
mine anchored cable
pre-stress loss
super tension
