Advanced detection device and detection method for geophysical prospecting while drilling

Abstract

The invention discloses drilling geophysical prospecting advanced detecting device. A first probe wire and a second probe wire are arranged inside a probe of the device, one end of the first probe wire is connected with the signal input end of a first electric brush ring, the other end of the first probe wire is connected with the high-potential signal output end of a first signal sending module, one end of the second probe wire is connected with the signal input end of a second electric brush ring, the other end of the second probe wire is connected with the high-potential signal output end of a second signal sending module, a metal conductive rod is connected with a zero-potential interface of the first signal sending module and a zero-potential interface of the second signal sending module respectively, the current signal input end of a first signal receiving module is communicated with the first probe wire, the current signal input end of a second signal receiving module is communicated with the second probe wire, and the signal output end of the first electric brush ring and the signal output end of the second electric brush ring are connected with the inner wall of a drill stem. The drilling geophysical prospecting advanced detecting device can conduct fine and effective detection prediction on harmful geologic bodies of eutrophic water and water conduction channels around drilled holes of tunnels and roadway heads.

Description

technical field [0001] The invention relates to the field of applied geophysical electrical method and drilling technology, in particular to an advanced detection device and detection method for geophysical prospecting while drilling. Background technique [0002] Advanced detection is mainly to detect whether there are harmful geological structures or water-rich bodies and water-guiding channels in front of the excavation roadway by direct or indirect methods to the direction of tunnel and roadway excavation, and provide detailed detection data for safe excavation of tunnels. [0003] At present, the direct method used for advanced detection of coal mines is the drilling method, and the indirect method is the geophysical method. Although the drilling results of the drilling method are relatively reliable, the construction period is long and the cost is high, which has a great impact on the normal production of tunnels and roadways. [0004] At present, there are mainly four...

AI Technical Summary

Problems solved by technology

[0005] Except for the drilling advance water detection method above, other geophysical methods are all advanced detection methods for tunnels, roadways or working faces. Various metal facilities such as I-beam support, bolt support, and conveyor belt support have a great influence on the observation results. The rate is a parameter, and the ability to exclude multi-solutions is poor, and the result is multi-solutions

Drilling advanced water detection method is to put the detection probe into the borehole for detection after drilling, but it will not work after the borehole collapses, and it is difficult to advance the probe after the borehole is too deep.

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