煤矿安全2019，Vol.50Issue(8)：194-198,5.DOI:10.13347/j.cnki.mkaq.2019.08.046
考虑渗流作用的锚杆支护巷道围岩稳定性分析
Stability Analysis of Surrounding Rock of Bolt Supporting Roadway Considering Seepage
摘要
Abstract
To study the stability of bolt support roadway under seepage field, using the equivalent analysis method, the support effect of the bolt is considered as a set of clamping force acting on both sides of the anchor and the strengthening parameters of the surrounding rock. What’s more, the seepage field is transformed into a set of one-dimensional radial volume force uniformly distributed in the surrounding rock. At the same time, the effects of bolt support and seepage on surrounding rock are considered. Based on the elastoplastic theory, the stress distribution of the surrounding rock of the roadway is derived, and the radius equation of the plastic zone of the coordinated deformation of the anchor and the surrounding rock under the seepage is obtained. Finally, the evaluation method of the surrounding rock stability is proposed. The results show that the influence of bolt support parameters on the stability of surrounding rock under the effect of seepage and without seepage is compared and analyzed by numerical examples. Under the same conditions, the bolt is required to provide greater support when seepage is considered.关键词
巷道支护/渗流场/围岩强化/锚固体/稳定性分析Key words
roadway support/seepage field/surrounding rock reinforcement/anchor/stability analysis分类
矿业与冶金引用本文复制引用
谷拴成,李晓栋,周攀..考虑渗流作用的锚杆支护巷道围岩稳定性分析[J].煤矿安全,2019,50(8):194-198,5.基金项目
国家自然科学基金资助项目(51508462) （51508462）
