立井井壁厚度的围岩压力最大值确定法

根据立井井壁破裂事故的调研,将井壁变形灾害分为五类,提出采用适当强度的井壁承受常规围岩压力;预测可能发生变形灾害的类型,设计谐调变形井壁结构,躲开井壁不可承受的灾害性荷栽。推出了由围岩压力最大值确定井壁厚度的简化计算公式,通过与精确解进行对比分析,给出了该简化公式的误差补偿系数。千米深立井的井壁结构设计实践与分析表明：此简化公式不仅便于工程应用,而且所设计的井壁能够满足“安全可靠、经济合理”的要求。最后讨论了井壁设计厚度的合理区间、井壁混凝土强度的合适等级,对抵御不同变形灾害的谐调井壁结构形式进行了初步讨论。

The Maximum Value Method for Determining the Pressures in Surrounding Rocks of Vertical Shaft Walls

Based on the investigation of accidents in shaft wall fracturing, the deformation hazards of shaft wall can be classified into five groups. This paper suggests: adopt the proper strength of shaft wall to bear the routine pressures in surrounding rocks; predict the type of the occurrences of deformation hazards; design tie harmonious deformation structure of shaft wall, avoid the hazardous load that the wall cannot bear. The simplified calculation formulae for determining the thickness of shaft wall by means of maximum pressure value in surrounding rocks are derived and through comparing with accurate solution, the compensating coefficient for errors of the simplified formulae is put forward. Design practice and analysis of 1000 m shaft show that the formulae not only facilitate the project application but also meet the " safe, reliable, economic and rational" requirements in design of shaft wall. At last, the rational range of wall thickness designed and the suitable grade of concrete for shaft walls and the harmonious structure of shaft wall in resisting the different deformation hazards are discussed.