Roadway drivage drilling induced polarization advance water probing forecasting method, device and probe

Abstract

The invention discloses a roadway drivage drilling induced polarization advance water probing forecasting method, device and probe. The probe is placed in a drill hole; a power supply negative electrode B is mounted in a roadway outside the drill hole and is connected with an on-site main machine by a power supply cable; a power supply positive electrode A, a measuring electrode M and a measuring electrode N of the probe are mounted inside the drill hole, and are connected with the on-site main machine by the power supply cable and a signal cable; the power supply positive electrode A and the power supply negative electrode B outside the drill hole form the power supply cable; the on-site main machine measures an electric field change signal by the measuring electrode M and the measuring electrode N of the probe; and the electric field change signal is input to the main machine to calculate and detect the apparent resistivity and apparent chargeability of a target; the probe is propelled to repeat the steps at each measuring point to measure the apparent resistivity and apparent chargeability of each point and generate a resistivity profile map and a chargeability profile map; and the rate of change of the apparent resistivity and apparent chargeability is calculated to determine an inner geological structure taking a drilling axis as a central cylindrical space.

Description

technical field [0001] The invention relates to a roadway excavation borehole induced polarization advanced water detection and prediction method, device and probe, which belong to the technical field of induced polarization method applied to geophysical electrical detection, and especially relate to the roadway excavation front and surrounding water-bearing bodies or Electrical advanced detection and forecasting technology for other unfavorable geological bodies. Background technique [0002] The advanced detection mainly uses direct or indirect methods to detect the tunneling direction in the front of the tunnel to detect whether there are geological structures or water-rich bodies and water-guiding channels ahead, and provide detailed detection data for safe tunneling. [0003] At present, the direct method used for advanced detection in coal mines is the drilling method. The drilling results are relatively reliable, but the construction period is long, the cost is high, ...

AI Technical Summary

Problems solved by technology

[0017] The above geophysical methods are all advanced detection methods for roadways or working faces. Due to the large interference of roadways or working faces, roadheaders in the roadway, rails on the roadway floor, I-beam support, bolt support, transportation, etc. Various metal facilities such as belt brackets have a great influence on the observation results, and the site construction design, data observation, result analysis, and interpretation are more complicated, and the detection parameters are single. Only one parameter of resistivity is used, and the ability to eliminate multiple solutions is poor. solution, the commonly used measure is to use multiple methods in combination, but this will greatly increase the cost of advanced forecasting

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