Error analysis and calibration method of mine directional drilling trajectory measuring device
Zhao Guangping 1, Ma Qingxun 2, Yuan Jianxiong 2, Xi Jianjun 2, Tong Jingxiong 3
1. Jinneng Holding Group Chengzhuang Coal Mine, Jincheng, 048012, China; 2. Xi 'an University of Science and Technology, Xi 'an 710054, China; 3.Xi 'an Ruitai Electric Co., Ltd., Xi 'an 710054, China
Directional drilling technology is the mainstream trend of current underground drilling. Medium and large coal mines often purchase drilling rigs or MWD devices from different manufacturers in batches according to the needs of mine safety production. The accuracy evaluation and calibration of new MWD devices is a technical problem faced by coal mine users. In this paper, based on the existing more accurate measuring device, the new measuring device is evaluated and calibrated by the method of borehole retest, and good results are obtained. At the same time, the measurement accuracy caused by the change of magnetic declination is discussed.
