西安科技大学学报2018，Vol.38Issue(1)：79-84,6.DOI:10.13800/j.cnki.xakjdxxb.2018.0112
软岩冻结凿井井帮稳定性影响因素敏感性分析
Sensitivity analysis of influential factors of surrounding rock stability in soft rock freezing sinking
摘要
Abstract
The construction design of freezing sinking in western soft rock mainly refers to the construc-tion experience of freezing sinking in East Midlands,which the determination of key parameters has no reliable evidence such as the section height of excavation,freezing strength,etc. For this purpose, through the identification of the main factors which influence the freezing soft rock radial deformation of surrounding rock and fully considering the intrinsic relationship between influential factors and the ac-tual engineering situation,four factors and four levels orthogonal test scheme were designed according to the theory of orthogonal test. Based on the correlation of sandstone strength parameters and freezing temperature,and programmed with fish parameter assignment for numerical model,the maximum radial displacement points is actually appeared at 2.13 h/3.Using 2 h/3 radial displacement as the evalua-tion index,the section height of excavation has the biggest effect on the radial deformation by range a-nalysis,and it has significant affect after more than 4.0 m.Finally,after supplement program simulation analysis,the results show that the section height has the largest impact with 22.7%.When the freeze strength is 24.0 ℃,the increase of freeze strength to control the deformation of frozen is not obvious. The conclusion has a practical reference for the determination of freezing temperature in the freezing sinking construction and setup of the section height of excavation.关键词
软岩冻结凿井/正交模拟试验/敏感性分析/数值模拟Key words
freezing sinking in soft rock/orthogonal simulation test/sensitivity analysis/numerical sim-ulation分类
矿业与冶金引用本文复制引用
王磊,陈世官,李祖勇..软岩冻结凿井井帮稳定性影响因素敏感性分析[J].西安科技大学学报,2018,38(1):79-84,6.基金项目
国家自然科学基金(51404193) （51404193）
中国博士后基金(2015M572581) （2015M572581）
陕西省自然科学基金(S2015YFJQ1194) （S2015YFJQ1194）
