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龙固煤矿副立井井筒表土层厚567.7m,冻结深度650m,双圈孔+辅助孔冻结。井筒冻结设计及冻结、掘砌施工中所采用的一些新思路、新技术、新工艺,如冻结壁设计理念、冻结孔靶域施工技术、大型螺杆冷冻机组的应用等,都被证明是可行的,并且具有较大的安全保证系数,改进和完善了冻结法施工工艺。
The shaft of the shaft of the deputy shaft in Longgu Coal Mine is 567.7m thick and has a freezing depth of 650m. The twin-hole + auxiliary hole is frozen. Some new ideas, new technologies and new techniques used in the design of wellbore freezing and freezing and excavation construction have been proved feasible, such as the design concept of frozen wall, the construction technology of freezing hole target area and the application of large screw refrigeration unit , And has a larger safety guarantee coefficient, improve and perfect the freezing method construction technology.