软岩硐室U型钢支护结构稳定性分析及加固措施研究  

Stability Analysis and Reinforcement Measures of U-shaped Steel Support Structure

作　　者：黄鑫 庞建勇[1] HUANG Xin;PANG Jian-yong(School of Civil Engineering and Architecture,Anhui University of Science and Technology,Huainan 232001,China)

机构地区：[1]安徽理工大学土木建筑学院

出　　处：《煤炭工程》2019年第8期39-43,共5页Coal Engineering

基　　金：淮南市科技计划重大创新平台及创新人才团队专项(2017A055);安徽省高校自然科学重大项目(KJ2015ZD20)

摘　　要：根据张集矿第二副井主排水泵房的围岩物理性质,对其存在的软岩硐室进行U型钢支护设计。利用ANSYS有限元分析软件建立U型钢模型,对其进行稳定性分析,绘制其应力图、位移图和弯矩图。结果显示,其应力主要集中在拱脚和两帮处,最大位移发生在拱顶处,为372.783mm;最大弯矩位于巷道两帮,为162kN·m,弯矩分布沿两帮竖直方向向下呈线性增大。根据分析结果提出加固措施,即在U型钢凹槽上每隔500mm焊接补强板,同时在其凹槽内填充混凝土提高支护刚度,通过60d围岩收敛量监测,证明加固措施取得了良好的效果。According to the physical properties of the surrounding rock of the main auxiliary drainage pump house of the second auxiliary shaft of Zhangji Mine,the U-shaped steel support is designed for the soft rock chamber in the roadway.The Ushaped steel model is established by ANSYS finite element analysis software and its stability analysis is carried out,to obtain its stress,displacement and bending moment diagrams.The results show that the stress mainly concentrates in the skewback and the roadway's sides.The maximum displacement occurs at 372.783mm at the vault,and the maximum bending moment is 162kN·m at the roadway's sides,the bending moment distribution increases linearly along the vertical direction of the roadway's sides.According to the analysis results,the reinforcement measures are proposed,that is,the reinforcing plate is welded every 500mm on the U-shaped steel groove,and the concrete is filled in the groove to improve the support rigidity.Through the monitoring of the convergence of 60d surrounding rock,it is proved that the reinforcement measures have achieved good results.

关 键 词：软岩硐室 U型钢支护 ANSYS有限元分析 加固措施 

分 类 号：TD354[矿业工程—矿井建设]