Radar Antenna Coal-Rock Interface Detection
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Solution Overview
Problem
Current coal-rock interface detection technologies in mines face challenges such as low accuracy and inability to adapt to sudden changes in working conditions, leading to resource wastage, gear abrasion, and safety risks due to environmental disturbances and complex geological conditions.
Innovation Solution
An intelligent detection and recognition system comprising a radar antenna, an intelligent lifting support, and an operating terminal that collects and processes radar data to draw a coal-rock horizon occurrence curve using a trace correlation coefficient algorithm, enabling accurate and adaptive detection of the coal-rock interface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual observation and experience-based judgment are used to adjust drum height, then operational simplicity is maintained, but detection accuracy and adaptability to sudden changes in working conditions deteriorate
Solution Approach 1:
The patent replaces manual observation and experience-based judgment with a radar-based detection system that uses electromagnetic waves to automatically detect the coal-rock interface. The radar antenna emits electromagnetic waves that penetrate the coal seam and reflect off the interface, providing objective, precise measurements without requiring manual intervention or complex mechanical adjustment mechanisms.
Solution Approach 2:
The system enables automatic detection and recognition of the coal-rock interface through the radar antenna and processing unit, which continuously monitor and analyze the interface position without requiring manual operation. The intelligent lifting support automatically adjusts the shearer drum height based on real-time radar data, making the system self-regulating and eliminating the need for continuous manual adjustment.
2Reliability
If existing coal and rock detection technology is used, then device simplicity is maintained, but detection accuracy and reliability deteriorate under complex mining geological conditions
Solution Approach 1:
The patent employs radar technology that uses electromagnetic wave propagation and reflection to detect the coal-rock interface, replacing less reliable mechanical or visual detection methods. The radar system emits electromagnetic waves that penetrate the coal seam and reflect off the interface, with the reflected waves being received and processed to determine interface position, providing reliable detection even under complex geological conditions with gangue, fissures, gas, and water.
Solution Approach 2:
The system dynamically adjusts detection parameters such as radar frequency, power, and processing algorithms based on the detected geological conditions. The intelligent lifting support modifies the shearer drum height in real-time according to the detected interface position and characteristics, allowing the system to adapt to varying coal seam thickness, rock hardness, and environmental factors like gas and water presence.
3Productivity
If non-contact real-time detection is implemented, then operational safety and productivity are improved, but detection precision and adaptability to environmental disturbances worsen
Solution Approach 1:
The patent uses radar technology that emits electromagnetic waves to detect the coal-rock interface without physical contact, enabling real-time detection while the shearer operates. The radar antenna is mounted on the intelligent lifting support and continuously scans the coal seam ahead of the cutting drum, providing real-time interface position data that improves productivity by eliminating the need for stop-and-observe operations.
Solution Approach 2:
The system implements a closed-loop feedback mechanism where the radar antenna continuously detects the coal-rock interface position, the processing unit analyzes the reflected electromagnetic waves to determine interface characteristics, and the intelligent lifting support automatically adjusts the shearer drum height in real-time based on this feedback. This continuous feedback loop maintains high detection precision despite environmental disturbances by constantly adapting to changing conditions.
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
The system improves detection accuracy to 2 cm and allows for real-time adaptation to changing mining environments, enhancing resource recovery and safety by dynamically adjusting the radar antenna position and reducing manual intervention.
Implementation Method 1
a radar antenna, an intelligent lifting support... the radar antenna is disposed at the top of the intelligent lifting support... acquire radar data of the to-be-detected coal seam collected by the radar antenna
Data Source
AI summary
An intelligent detection and recognition system and method for a coal-rock interface of a mine are provided. The intelligent detection and recognition system mainly includes an intelligent lifting support fastened to the top of a shearer, a non-contact radar antenna disposed at the top of the intelligent lifting support, and an operating terminal with which the radar antenna wirelessly conducts information transmission. In an operating state, a radiation direction of the radar antenna is perpendicular to the surface of a to-be-detected coal seam, and the operating terminal is configured to acquire radar data of the to-be-detected coal seam collected by the radar antenna, and draw and display a coal-rock horizon occurrence curve according to the radar data.