Method for monitoring intrusive tunnel based on resistivity change gradient

• Main Authors: WANG YING, LI YUNCHEN, SU YUBIN, XU XIAOYANG, XIE LIUJUN, SHEN SIHONGREN, WANG BO, XIN GUOXU, CHEN HONGYUN, XU ZIQIANG, SHE ZILONG, LI XIAOZHAO, ZHANG YAN, CHEN SHENG, ZENG LINFENG
• Format: Patent
• Language: Chinese; English
• Published: 09.01.2024
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention discloses a method for monitoring an invading tunnel based on a resistivity change gradient, which comprises the following steps of: performing electrical method monitoring for the first time to obtain initial apparent resistivity data, performing calculation processing on the initial apparent resistivity data to obtain a baseline resistivity grid data matrix, and performing electrical method monitoring again after a period of time to obtain a baseline resistivity grid data matrix; calculating and processing to obtain a resistivity grid data matrix of the section at the moment t, and performing gradient operation on the two matrixes to obtain a section resistivity change gradient map at the moment t; taking the matrix at the moment t as a new baseline resistivity data matrix; repeating the steps to obtain a profile resistivity change gradient map of each subsequent interval time period; and finally, setting a threshold value, and analyzing and judging a high abnormal region to realize distinguis