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| Study on construction technology of freezing method sinking in main inclined shaft of Yuandatan Mine |
| Yang Jie1, Liu Leibin2, Liang Hongzhen1, Zhao Jian2, 3 |
| 1. China Coal Construction Engineering Group Co., Ltd., Beijing 102218, China; 2. College of Resources and Safety Engineering, China University of Mining and Technology, Beijing 100083, China; 3. Geotechnical Institute, TU Bergakademie Freiberg, Freiberg 09599, Germany |
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Abstract The freezing method construction of Yuandatan Mine main inclined shaft was taken as engineering background, the freezing construction, sinking construction technology and safety measures were studied. Freezing construction process was sectional freezing, different diameter frozen tube and local freezing. The thickness of frozen wall was calculated by the Domke formula, and the thickness of the frozen wall of different freezing section was determined. The recycling length was 6 m. The inner well wall was parallel constructed after the tunneling and outer well wall construction. To prevent broken water, fire and other accidents, measures that waterstops at well wall connections, avoiding inner and outer well wall connections together, laying reasonably the equipment of cutting frozen tube were taken.
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