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本文通过对与南寨煤矿地层条件相近的有关冻结井井壁破坏原因分析。在南寨煤矿冻结井筒井壁结构设计中，运用了“抗”与“让”相结合的支护技术，采用了泡沫板，ＢＲ型增强防水剂等新的井壁支护材料，提出了可压缩围板双层钢筋混凝土井壁结构。它不仅具有复合井壁在防水、减少竖向约束力等方面的优点，而且弥补了复合井壁费用高，井壁可缩性差及施工工艺复杂的问题。实践证明了设计的合理性和先进性，并取得了预期的技术经济效果。
In this paper, we analyze the reason of the damage to the shaft wall of the frozen shaft that is similar to the formation conditions in Nanzai Coal Mine. In the design of the wellbore wall structure of the frozen shaft in Nanzhai Coal Mine, the support technology of “anti” and “let” is used, and the new shaft wall support material such as foam board and BR reinforced waterproofing agent is adopted, Coat double-wall reinforced concrete shaft wall structure. The utility model not only has the advantages of composite wellbore in waterproofing and vertical restraint reduction, but also makes up for the problems of high cost of composite wellbore, poor shrinkability of sidewall and complicated construction process. Practice has proved the rationality and advanced design, and achieved the expected technical and economic results.