Distribution Law Research Of Freezing Temperature Field In High Pressure Water Strata

The moisture content of the various strata of the key issues of the high-pressure water strata freezing sinking relative to the average rock formations high in this case, how to ensure the stability and security of the frozen wall, and with the depth of the well construction continued to increase, accuratepredict freezing wall temperature field development was extremely important.Return air shaft Pingdingshan Pingdingshan Coal Mine is located in a port south of the village, Li, the Jiaxian Lee rural population, belongs to piedmont Hung colluvium plains. The wellbore design uses vertical shaft pioneering, freezing method construction, wellbore full depth of1075m. Net Pingdingshan Coal Mine back Air Shaft diameter6.5m, borehole wall maximum thickness of0.8m wellbore Maximum boring diameter of8.1m, the main row of holes+anti-spalling the hole freeze the program for construction. In this paper, the indoor soil test and field measurement data of high-pressure water layer of freezing construction method to conduct preliminary studies, preliminary forecast from the measured data to the various layers freeze wall cross circle time; orthogonal experiment method of least squares will be Soil coefficient actual thermophysical parameters of the indoor soil test based layer bit optimized, ready for the next analog loop temperature as well as the various layers; Finally, the site measured data for each freeze drilling brine go using ANSYS simulation software information modeling and the final development of freezing wall temperature field simulated horizon, get each layer frozen wall thickness changes over time, the average temperature and temperature wells to help freeze wall construction actual physical quantity, provide scientific guidance for the safe and efficient construction.In this paper, a field measurement, numerical simulation method of combining freezing wall temperature field of high-pressure water strata formation and melting of the law, with some reference to the actual construction of the project.