塔什店矿区马头门稳定性数值模拟分析

Numerical Simulation Study on Stability of Ingate in Soft Rock Layer of Tashidian Mining Area

摘要: 以塔什店风井马头门为例，根据该软岩地层实测物理特性参数，利用有限元软件对马头门结构进行模拟，并对马头门结构支护前后巷道围岩及称砌受力情况进行分析。分析结果表明：随着断面减小，直墙高度降低，直墙应变呈下降的趋势，而拱顶与拱肩混凝土应变呈上升趋势；支护前后巷道周边围岩的最大沉降位移均位于巷道顶部，混凝土衬砌能够较好地控制围岩变形；实时监测马头门应力应变的变化并采取相应的措施能够确保衬砌结构的正常工作状态和井筒安全。

Abstract: Based on the ingate of the wind shaft in Tashidian and the measured physical parameters in that soft rock layer, the ingate structure is simulated by Ansys and the forces of the surroundings and blocks are studied before and after the ingate structure is supported. The study shows that the straight wall strain falls and that the strain of the vault and spandrel rises when the ingate section and the straight wall height reduce. The largest settlement displacements of the surrounding rock are all located on the roadway top before and after supporting. The concrete blocks control the deformation of the surrounding rock very well. Continuously monitoring the stress and the strain of the ingate and taking corresponding measures make a normal state of the block structure and the safety of the shaft.