Research on monitoring data of coal mine shaft deviation based on R/S analysis method
BIN Xiongzhi
YIN Leijian
YUAN Shuai
JIANG Shuyin
Abstract：A monitoring system for coal mine shaft deviation and safety warning in areas with thick soil layers was established using a fiber Bragg grating inclinometer.The variation law of shaft deviation was obtained,and the R/S analysis method was used to conduct in-depth analysis of the monitoring data of shaft deviation.Research has shown that fiber Bragg grating inclinometers can be used for mo-nitoring wellbore deflection,with a maximum deflection of 0.146 9 m during the monitoring period,which is within a safe range.R/S analysis shows that the Hurst exponent of the monitoring data ran-ges from 0.609 4 to 0.996 4,which conforms to the positive biased random walk process and has strong positive persistence.In the future,the development process of wellbore deviation will continue to follow the existing development pattern.The minimum observation time scale for the development law of wellbore deflection should not be less than 15 days.
Keywords：wellbore monitoringwellbore deviationtime seriesrelabeling rangeHurst exponent
Publication Date：2025-02-24
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)