Discussion on the freezing drilling technology of shafts in Taigemiao mining area
HE Yuqiao
HAN Shengming
LIU Mingliang
WEI Zihang
Abstract：To clarify the main influencing factors of the key processes of frozen drilling in the wellbore of the Taigemiao mining area,an analysis was conducted based on the distribution characteristics of the rock strata in the mining area and the physical and mechanical properties of various types of sand-stone,combined with the actual drilling construction data.Analysis suggests that the total thickness of sandy rock strata in the mining area accounts for more than 80％.The overall distribution of the rock strata is simple,with low compressive strength and small rock strata inclination.However,the rock strength varies greatly at 300 m and 650 m,and the alternating hardness of the rock is prone to cause borehole deviation.In a very few layers,there is a risk of slurry leakage and diameter reduction,which requires attention during the drilling period.Through the statistical analysis of the drilling effi-ciency of the four shafts in the mining area,it is concluded that the actual conditions of the strata are more favorable than the expected conditions,the drilling period is guaranteed,and the drilling effi-ciency of 2 100 m/(unit·month)can be achieved.
Keywords：frozen boreholecorrect deviationsandstonestratum dip angledrilling rig efficiency
Publication Date：2025-12-31
Online Publishing Date：2025-11-25(First online date of this platform, not the publication date of the document)
Pages：5( 84-88 )