煤矿安全2017，Vol.48Issue(11)：53-56,4.DOI:10.13347/j.cnki.mkaq.2017.11.014
特大断面立井初支优化研究
Optimization Research on Primary Support of Shaft with Large Section
摘要
Abstract
In this paper,combined with the typical engineering examples,aiming at the phenomenon of shotcrete spalling of concrete and cracks,we study deformation mechanism and failure characteristics of the primary support system,and propose two kinds of primary support optimization schemes.Using numerical simulation,we compare the supporting effect of optimization schemes.The results show that the anchor is the main initial support of shaft,but,in the case of low strength and relatively broken rock mass,the supporting role of the bolt is weakened,the steel arch is needed to control the stability of the wall surrounding rock.The displacement of the well wall is reduced by 16％ through the increase of the length and density of the bolt.Enhance steel arch type and increase the density of steel arch can reduce the displacement of shaft wall by 47％,the plastic yield range is reduced by more than 50％.关键词
特大断面立井/不良岩体地质/初期支护/井筒稳定性控制/变形机理/破坏特征Key words
shaft with large cross section/bad rock mass/initial support/shaft stability control/deformation mechanism/failure characteristics分类
矿业与冶金引用本文复制引用
张赞,苏学贵,王堂,杨宗一,张锁..特大断面立井初支优化研究[J].煤矿安全,2017,48(11):53-56,4.基金项目
国家自然科学基金资助项目(51274145) （51274145）
山西省自然科学基金资助项目(2015011066) （2015011066）
