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Directional induced polarization real-time advance water detecting device and method while drilling for tunnel construction

A technique for stimulating polarization and tunnel construction, applied in measuring devices, electric/magnetic exploration, instruments, etc., can solve the problems that auxiliary geophysical detection methods cannot be directly applied to tunnels, metal drill pipe interference, and have not been widely promoted. , to achieve the effect of avoiding interference, breaking through low resistance, and realizing orientation

Active Publication Date: 2013-05-01
山东百廿慧通工程科技有限公司
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  • Abstract
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Problems solved by technology

However, there are some special problems in the advanced drilling and water exploration of the tunnel working face, which makes the auxiliary geophysical detection method of ground drilling unable to be directly applied to the tunnel.
An advanced water detection and forecasting device proposed by the patent application number 201210182857.0 has not been widely promoted in practical applications due to its low detection depth and serious interference and influence from metal drill pipes.

Method used

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  • Directional induced polarization real-time advance water detecting device and method while drilling for tunnel construction
  • Directional induced polarization real-time advance water detecting device and method while drilling for tunnel construction
  • Directional induced polarization real-time advance water detecting device and method while drilling for tunnel construction

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Embodiment Construction

[0035]The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0036] Taking a certain tunnel as an example, the section of the tunnel is arched, with a span of 12m and a height of 10m. The tunnel construction progresses to the vicinity of mileage YK15+533, and there may be water bodies ahead. In order to ascertain the geological conditions ahead and provide basis and guidance for construction, the method of directional real-time advanced water exploration and prediction while drilling is used for detection. The method flow chart is as follows Figure 7 shown.

[0037] (1) On the drill bit 1 for advanced horizontal drilling, the connecting bearing 2 is installed, and the rear end of the connecting bearing 2 is connected to the high-strength insulating drilling sleeve 3 in the form of a slot, as shown in image 3 shown.

[0038] (2) Arrange elastic ring-shaped rolling electrodes 4 on the outer periphery of the high...

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Abstract

The invention discloses a directional induced polarization real-time advance water detecting device while drilling for tunnel construction. The device comprises a drill bit, a high-strength insulated sleeve while drilling, and a directional induced polarization detection system, wherein the drill bit is connected with the high-strength insulated sleeve while drilling through a connecting bearing, and the directional induced polarization detection system is distributed at the periphery of the high-strength insulated sleeve while drilling. The invention also provides a corresponding directional induced polarization real-time advance water detecting method while drilling for tunnel construction. According to the device and the method disclosed by the invention, the interference of the construction environment is avoided, the detection effect is better, the utilization efficiency of an advance borehole is improved, current orientation is realized, the low resistance at the borehole wall is broken through, the detection range is enlarged, an electrode is protected, and a better coupling contact between the electrode and a rock-soil body is guaranteed.

Description

technical field [0001] The invention relates to a device and method for detecting and predicting directional excitation polarization while drilling during tunnel construction, in particular to a device and method for detecting and predicting polarization while drilling. Under advanced conditions, a device and method for real-time detection and forecasting of the water content in front of the working face during tunnel construction by using a directional induced polarization detection system. Background technique [0002] Water and mud inrush disasters are the main challenges and difficulties faced in tunnel construction, often causing serious economic losses and production safety problems. During tunnel construction, early detection of the water content in front of the construction face plays an important role in avoiding water and mud inrush disasters. Advanced horizontal drilling is a commonly used advanced water detection method at present. By arranging 1-3 boreholes on ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/02
Inventor 李术才刘斌王传武聂利超宋杰刘征宇孙怀凤许新骥徐磊郝亭宇周浩
Owner 山东百廿慧通工程科技有限公司
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