US 12,252,989 B1
Induced polarization method and system mounted on while drilling-type drill rig based on long-length power source for water detection in tunnels
Lichao Nie, Jinan (CN); Zhaoyang Deng, Jinan (CN); Zhiqiang Li, Jinan (CN); Lei Han, Jinan (CN); Shixun Jia, Jinan (CN); Yuancheng Li, Jinan (CN); and Pengyu Jing, Jinan (CN)
Assigned to SHANDONG UNIVERSITY, Jinan (CN)
Filed by SHANDONG UNIVERSITY, Jinan (CN)
Filed on Nov. 8, 2024, as Appl. No. 18/941,053.
Claims priority of application No. 202410711107.0 (CN), filed on Jun. 4, 2024.
Int. Cl. E21D 9/00 (2006.01)
CPC E21D 9/003 (2013.01) 7 Claims
OG exemplary drawing
 
1. An induced polarization (IP) system mounted on a while drilling-type drill rig based on a long-length power source for water detection in tunnels, comprising a long-length power source module for power supply while drilling, an array-type data collection module and a positioning and interpretation module; wherein,
the long-length power source module for power supply while drilling comprises a long-length power source and an electrode; wherein, the electrode is a drill pipe of the while drilling-type drill rig; the drill pipe is connected to the while drilling-type drill rig through a rotary joint; one end of the rotary joint connected to the drill pipe is able to rotate, another end of the rotary joint connected to the while drilling-type drill rig is fixed, and a silicon carbide connecting piece is connected therebetween; and, the long-length power source is defined to be formed by superposing finite point power sources in a period of IP detection in a tunnel performed by the drill pipe at different depths;
the array-type data collection module is arranged on a tunnel face of the tunnel in an array mode and is used for acquiring IP signals for water detection in the tunnel at different depths and transmitting the signals to the positioning and interpretation module; and
the positioning and interpretation module, is configured to:
obtain data induced separately when a point power source is located near a drill bit at a current time, through differentiating an IP signal for water detection in the tunnel at the current time from an IP signal for water detection in the tunnel at a previous time; and
interpret and image the data induced separately when the point power source is located near the drill bit, to realize a dynamic identification of hazardous water sources in front of the tunnel face.