Separation Layer Status Monitoring via Subsidence and Stress Data
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Solution Overview
Problem
In coal mining, water inrush accidents often occur due to aquifer influences in coal mine seam roofs without clear warning signs, posing serious safety and economic risks, and existing methods for determining the development status of separation layers are inaccurate and costly.
Innovation Solution
A method and device that utilize surface subsidence variation data, rock stress variation data, and water pressure variation data to determine the height decrease of a caving zone, allowing for accurate assessment of the separation layer's development status, thereby predicting and preventing water inrush accidents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional methods are used to determine the development status of separation layer, then the determination can be made, but the accuracy is low and the cost is high
Solution Approach 1:
The patent replaces traditional mechanical drilling and physical sampling methods with a field monitoring system that uses sensors to detect rock stress, water pressure, and surface subsidence. This substitution of mechanical intrusion with remote sensing and data analysis achieves more accurate determination of separation layer development status while eliminating the high costs and safety risks associated with traditional methods
Solution Approach 2:
The patent introduces field monitoring devices as intermediaries between the separation layer and the analysis system. These devices (stress sensors, pressure sensors, subsidence monitoring equipment) act as mediators that indirectly measure the development status of the separation layer by detecting changes in rock stress, water pressure, and surface movement, thereby achieving accurate determination without direct physical access to the separation layer
2Measurement precision
If field monitoring is used to detect separation layer status, then the accuracy improves, but the device complexity increases
Solution Approach 1:
The patent designs field monitoring devices that perform multiple functions: stress sensors simultaneously monitor rock stress changes and provide data for determining separation layer development; water pressure sensors detect both water pressure variations and aquifer influence; subsidence monitoring equipment tracks surface movement and caving zone evolution. This multi-functionality reduces the need for separate specialized devices, thereby managing system complexity while maintaining high determination accuracy
Solution Approach 2:
The patent implements a feedback mechanism where field monitoring data is continuously collected, analyzed, and used to update the determination of separation layer development status. The system processes real-time data from multiple sensors, provides feedback on the development status, and allows for dynamic adjustment of monitoring parameters, thereby achieving high accuracy through an integrated but manageable system architecture
Data Source
AI summary
Disclosed are a method and a related device for determining a development status of a separation layer in a coal mine. The method includes: obtaining surface subsidence variation data of the coal mine within a preset time interval, rock stress variation data of a caving zone of the coal mine and water pressure variation data; determining a height decrease of the caving zone based on the rock stress variation data and the water pressure variation data; and determining the development status of the separation layer of the coal mine based on the height decrease and the surface subsidence variation data.