煤矿安全2017，Vol.48Issue(6)：219-222,4.DOI:10.13347/j.cnki.mkaq.2017.06.058
基于应变软化的巷道锚固失稳分析
Instability Analysis of Anchorage Supporting in Soft Rock Roadway Based on Strain Softening
摘要
Abstract
In view of the problems such as spray layer falling off,decrease of anchoring force and serious floor heave which appear in the western weakly cemented soft rock roadway,we carry out field sampling in main transport roadway sandy mudstone formation of Inner Mongolia Luxin Mining Area and triaxial tests have been performed in different confining pressure.The experiment date show that the stain behavior has the obvious softening characteristic after peak strength,and there is residual deformation stage.So it is more suitable for thilinear strain softening model to analyze.By means of FLAC double linear strain softening model to carry out fish correction and to realize the numerical application of the model.The verification model shows that the thilinear strain softening model even more conforms to the deformation characteristics of mudstone.Through the analysis of construction stability of mudstone roadway and the evaluation with the help of softening degree index.It shows that the mudstone roadway under the effect of the anchoring and shotcreting support has little influence on controlling the deformation of surrounding rock because of the maximum degree of softening and the increasing of softening depth.And the bolt axial force increases and later decreases and loses support ability in the end.关键词
弱胶结泥岩/三轴压缩/应变软化/软化度/数值模拟Key words
poor cemented mudstone/triaxial compression/strain softening/degree of softening/numerical simulation分类
矿业与冶金引用本文复制引用
李祖勇,王磊..基于应变软化的巷道锚固失稳分析[J].煤矿安全,2017,48(6):219-222,4.基金项目
国家自然科学基金资助项目(51404193) （51404193）
中国博士后基金面上资助项目(2015M572581) （2015M572581）
陕西省自然科学基金青年人才资助项目(S2015YFJQ1194) （S2015YFJQ1194）
