Regression Forecast Gneissic Freeze Water Layer Threshold of Shaft Construction
SHI Zheng-jing1, ZHANG You-bo2, LIAN Fa-xian3
1. Xinji No.1 Mine, State Development and Investment Corporation Ltd., Fengtai 232100, China; 2. Xinji No.2 Mine, State Development and Investment Corporation Ltd., Fengtai 232100, China; 3. Hydrological Department, State Development and Investment Corporation Ltd., Huainan 232000, China
In view of the heavy curtain lower freezing point position was difficult to accurately estimate wellbore freezing leading to construction problems, using the regression analysis method from the vertical and radial temperature field variation analysis, the freezing point of formation was concluded. The scope of safety construction was determined, the construction craft was simplified to achieve the purpose of safety construction. The technology provided important reference value of freezing method construction of Huainan coal mine shaft safety threshold.
