DIRECTIONAL CORRECTION TECHNIQUE IN VERTICAL FROZEN HOLES

Yang Chuanyi, Li Jianxiang, Su Shaoyun. DIRECTIONAL CORRECTION TECHNIQUE IN VERTICAL FROZEN HOLES[J]. COAL GEOLOGY & EXPLORATION, 1993, 21(6): 59-63.

Citation:

Yang Chuanyi, Li Jianxiang, Su Shaoyun. DIRECTIONAL CORRECTION TECHNIQUE IN VERTICAL FROZEN HOLES[J]. COAL GEOLOGY & EXPLORATION, 1993, 21(6): 59-63.

Citation:

Yang Chuanyi, Li Jianxiang, Su Shaoyun. DIRECTIONAL CORRECTION TECHNIQUE IN VERTICAL FROZEN HOLES[J]. COAL GEOLOGY & EXPLORATION, 1993, 21(6): 59-63.

Abstract

During the operation of the vertical frozen holes in Donghuantuo Coal Mine,Kailuan,JTD-3K directional gyroscope and deflector which can be withdrawn with the string were used for directional correction,with mission success rate of 100%.Besides,the operational measurements are much more improved,e.g.correct selection of deflecting position,delimitation of pre-deflecting area,determination of optimum deflector working angle and proper operation,etc.

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