Comparison of Wall Protection with Casing and Mud for Medium-depth Hole Drilling in Thick Overburden Layer in the East of Henan

Abstract:

The paper describes the construction technologies of pre-exploration in Jiaozhuang iron mine and Suixian coalmine in Henan Province. By the comparison of the construction experiences in these 2 mines, analysis is made on the adaptability of wall protection with casing and mud in the east of Henan.