Drill-Hole Rock Burst Monitoring with Radial Strain Sensing
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Solution Overview
Problem
Current rock burst monitoring methods in coal mines are single and inflexible, failing to effectively monitor and warn of rock burst events, which poses a significant threat to coal mine safety.
Innovation Solution
A monitoring and warning device for rock burst in coal mines, comprising an integration rod with radial adjustment components, bases with elastic components and strain gauges, and a measuring instrument, which allows for real-time monitoring of rock mass stress and movement, and adjusts monitoring locations based on distance changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single monitoring method is used, then the device structure is simple, but the monitoring effect is general and cannot be adjusted according to actual situation
Solution Approach 1:
The monitoring device is segmented into multiple independent monitoring components (stress monitoring, displacement monitoring, acoustic emission monitoring, gas monitoring) that can be selectively activated. Each component is a separate module with its own sensors and measurement mechanisms, allowing the system to be configured based on specific monitoring needs without requiring complete system deployment.
Solution Approach 2:
The device employs adjustable monitoring parameters and dynamic configuration capabilities, where monitoring frequencies, sensor positions, and active monitoring types can be modified based on real-time conditions. The radial adjustment mechanism allows dynamic repositioning of sensors along the drill hole radius to adapt to varying rock mass conditions.
2Measurement precision
If radial adjustment components with elastic components are used to ensure tight attachment, then the measurement precision is improved, but the device complexity increases
Solution Approach 1:
The elastic components (springs) are configured to automatically adjust the attachment pressure between the monitoring device and the drill hole wall. The system uses its own structural elasticity to maintain optimal contact force, eliminating the need for external adjustment mechanisms or additional actuators. The radial adjustment mechanism allows the device to self-regulate its attachment force based on hole diameter variations.
3Reliability
If multiple monitoring components are integrated, then the monitoring comprehensiveness is improved, but the device complexity increases
Solution Approach 1:
The monitoring device integrates multiple monitoring functions (stress, displacement, acoustic emission, gas detection) within a single unified platform that shares common structural elements, power supply, and data processing systems. The drill hole-based installation method serves as a universal approach for deploying all monitoring components, reducing the need for separate installation procedures for each sensor type.
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 device provides enhanced monitoring and warning capabilities by ensuring tight attachment of sensors to the drill hole wall, allowing for precise stress monitoring, movement tracking, and directional gas leakage detection, thereby improving coal mine safety.
Implementation Method 1
the bases are further connected with attachment components through elastic components
Implementation Method 2
the attachment components are embedded with first strain gauges
Implementation Method 3
the measuring instrument is used to measure a distance between the measuring instrument and the attachment components
Data Source
AI summary
The present disclosure provides a monitoring and warning device for rock burst in coal mine, which is configured for monitoring a rock mass in a drill hole, the monitoring and warning device for rock burst in coal mine includes: an integration rod, radial adjustment components, a plurality of bases, and a measuring instrument, the integration rod is extended into the drill hole; the radial adjustment components are provided on the integration rod, and have a plurality of radial adjustment ends; a plurality of bases are correspondingly provided in the radial adjustment ends, and the bases are further connected with attachment components through elastic components, and the attachment components are embedded with first strain gauges; the measuring instrument is rotatably provided in the integration rod, and is used to measure the distance between the measuring instrument and the attachment components.