井壁整体稳定性
structural stability of bored shaft
泥页岩井壁不稳定性
Shale-Related borehole instability
潜水非稳定井流
groundwater flow in unconfined aquifer
unstable well flow in underground water
完整井稳定流
steady flow to fully penetrated well
孔壁稳定
Stability of hole wall
Stabilization of Hole Wall