Abstract: In this paper,the drilling trajectory measurement is taken as the research object,aiming at the large deviation between the actual trajectory and the design of drilling caused by the traditional drilling method of rotary drill,and combined with the field application of mine,the drilling trajectory measurement is proposed.This paper describes the structure,principle and construction method of borehole track recorder used in YZG7 mine and its application in the field of Zhu Jiadian coal mine.In practice,the deviation of the position of the end hole and the designed end hole is 2.28 m up and down,and 7.62 m left and right,and the drilling situation of the track of the real drill is mastered.

Key words: borehole track recorder,probe tube,borehole track,parameter monitoring