煤矿安全2017，Vol.48Issue(2)：138-140,144,4.DOI:10.13347/j.cnki.mkaq.2017.02.037
综放大跨度开切眼锚索中心对称控制系统研究与应用
Study on Central Symmetry Controlling System for Cable of Large Span Open-off Cut at Fully Mechanized Caving Mining Face and Its Application
摘要
Abstract
For the problem of surrounding rock control problem of large span open-off cut at fully mechanized caving mining face,we use UDEC4.0 to simulate and analyze the deformation and failure features of surrounding rock.The analysis result shows that the plastic zone of thick top coal is the arch shape and the plastic zone of floor is the inverted trapezoidal shape.And the increase of open-off cut width is the most sensitive to the range of roof plastic failure,but the least to floor.The shortcomings of original support scheme are pointed out in this paper.On the basis of the analysis results,the central symmetry cable support technology of truss cable and sing cable is proposed to control the surrounding rock.The truss cable and sing cable in the system are considered to be anchored on the both sides of arch roof in the stable zone which could constrict the development of plastic zone with stress arch in roof coal.Field practices show that the support program can control the deformation of surrounding rock.关键词
大跨度开切眼/厚顶煤/数值模拟/锚索中心对称支护/围岩控制Key words
large span open-off cut/thick top coal/numerical modeling/cable central symmetry support/surrounding rock control分类
矿业与冶金引用本文复制引用
徐祝贺,段其涛,李永明,杨玉亮..综放大跨度开切眼锚索中心对称控制系统研究与应用[J].煤矿安全,2017,48(2):138-140,144,4.基金项目
大同大学2015年度青年科研基金资助项目(2015Q8) （2015Q8）
