Transient Electromagnetic Detection in Drill Rods for Real-Time Geological Warning
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Solution Overview
Problem
Conventional hydrogeological condition detection methods in mine roadways are either expensive and time-consuming (borehole detection) or difficult to apply at the driving face due to sensitivity and space limitations (geophysical detection), and traditional borehole detection methods face challenges with borehole deformation and collapse, preventing real-time early warnings and predictions.
Innovation Solution
A transient electromagnetic advanced detection system and method that includes a detection host, an electromagnetic signal transmitter, and a probe within a drill rod, emitting and receiving signals to determine three-dimensional electromagnetic intensities and locate harmful geological bodies, such as water-bearing bodies, in real-time during drilling, combining borehole and geophysical detection methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If borehole detection methods are used, then detection accuracy is improved, but cost and time consumption increase significantly
Solution Approach 1:
The system performs detection during the drilling process itself, before the borehole is completed. The electromagnetic transmitter and receiver are positioned on the drill rod to detect geological features in advance, allowing early warning and prediction without waiting for post-drilling analysis
Solution Approach 2:
The patent replaces traditional mechanical borehole detection methods with electromagnetic detection. The electromagnetic transmitter generates signals that penetrate the surrounding rock, and the receiver detects reflected or transmitted signals to identify geological features, eliminating the need for physical borehole sampling and analysis
2Measurement precision
If traditional borehole detection methods are used, then geological features can be detected, but borehole deformation and collapse prevent real-time detection
Solution Approach 1:
The system detects geological features during the drilling process before borehole deformation or collapse occurs. By positioning the electromagnetic transmitter and receiver on the drill rod, detection is performed in advance when the borehole structure is still stable
Solution Approach 2:
The drill rod serves as an intermediary carrier for the electromagnetic transmitter and receiver. This allows the detection system to be positioned within the borehole without requiring the borehole to be stable, as the drill rod provides structural support and signal transmission path
3Ease of manufacture
If geophysical detection methods are used, then detection cost is reduced, but sensitivity and roadway space limitations prevent application at the driving face
Solution Approach 1:
The detection system is divided into modular components (transmitter, receiver, processing unit) that can be integrated onto the drill rod. This segmented design allows the system to adapt to the confined space of the roadway while maintaining detection capabilities
Solution Approach 2:
The drill rod serves multiple functions: it is both the drilling tool and the carrier for the electromagnetic detection system. This multi-functionality eliminates the need for separate detection equipment, reducing cost while enabling deployment in the limited roadway space
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This system enables accurate, real-time detection of geological features and harmful bodies around the borehole, improving detection accuracy and reducing the number of boreholes drilled, while providing early warnings and predictions, overcoming the limitations of traditional methods.
Implementation Method 1
The electromagnetic signal transmitter is configured to emit a transient electromagnetic signal in accordance with a detection control signal from the detection host
Implementation Method 2
The probe, arranged inside the other end of the drill rod and close to the drill bit, is configured to receive a secondary magnetic signal excited by the transient electromagnetic signal via a surrounding rock
Data Source
AI summary
Disclosed is a system and a method of transient electromagnetic advanced detection. The system includes a detection host, an electromagnetic signal transmitter, a probe, and a communication device. The system and method of transient electromagnetic advance detection disclosed by examples of the present disclosure can realize an early-warning through a transient electromagnetic advance detection in a borehole while drilling the borehole in a tunnel or a roadway.