Surrounding Rock Stress Monitoring With Hydraulic Burst Mitigation
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Solution Overview
Problem
Existing technologies lack effective monitoring and early warning means for areas of abnormally increased stress in surrounding rock, leading to dynamic disasters such as rock bursts and roof collapses in deep mines, posing risks to equipment and personnel.
Innovation Solution
An early warning and emergency device comprising a tubular front and rear shell with stress monitoring units, a high-pressure jet mechanism, acoustic and optical warning units, and a data analysis controller, which forms a real-time cloud map of stress changes and responds with hydraulic perforation and softening to mitigate sudden stress changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If stress monitoring and early warning systems are installed in deep mines, then safety of underground workers is improved, but device complexity and cost increase
Solution Approach 1:
The monitoring system is divided into multiple independent monitoring units that can be distributed throughout the mine. Each unit independently monitors stress in its local area, allowing the system to scale without increasing overall complexity. The modular design enables incremental deployment and simplifies maintenance.
Solution Approach 2:
Wireless communication modules serve as intermediaries between the distributed monitoring units and the central control system. This eliminates the need for complex wired infrastructure in the harsh mine environment, reducing installation complexity while maintaining reliable data transmission for safety monitoring.
2Measurement precision
If multiple monitoring units are deployed to cover areas of abnormally increased stress, then measurement coverage is improved, but device complexity increases
Solution Approach 1:
Each monitoring unit is designed as a universal module capable of monitoring stress in multiple directions and adapting to different installation locations. The standardized design allows the same unit to be deployed throughout the mine, reducing the variety of components needed and simplifying the overall system while achieving comprehensive coverage.
3Loss of time
If real-time monitoring and early warning systems are implemented, then response time to rock bursts is improved, but energy consumption increases
Solution Approach 1:
The monitoring system employs periodic stress measurements rather than continuous monitoring. The monitoring units take readings at predetermined intervals and only activate warning signals when stress thresholds are exceeded. This periodic operation significantly reduces energy consumption while maintaining the ability to detect and respond to sudden stress changes that precede rock bursts.
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
Enables timely monitoring, early warning, and targeted intervention to minimize casualties and property losses from sudden stress changes and rock bursts by forming a real-time cloud map and deploying a self-positioning temporary patrol robot for support and communication.
Implementation Method 1
the high-pressure jet mechanism includes a water supply pipe I, a rotary joint, a water supply pipe II, a high-pressure nozzle, and a direction adjustment assembly
Implementation Method 2
responds with hydraulic perforation and softening to mitigate sudden stress changes
Implementation Method 3
a stress monitoring unit is provided inside each of the annular cavities of the front shell and the rear shell
Implementation Method 4
an acoustic and optical early warning unit, which is disposed at the rear end of the rear shell and is communicatively connected to the data analysis controller
Data Source
AI summary
Provided are an early warning and emergency device for a sudden stress change in surrounding rock and a method of use, which relates to the technical field of underground mining. The device includes a front shell, a rotating body, a rear shell, a driving device, a stress monitoring unit, an acoustic and optical early warning unit, a high-pressure jet mechanism, and a data analysis controller. By using the device of the present disclosure, a cloud map of sudden stress changes in surrounding rock can be formed in real time, timely monitoring can be carried out in a case where the stress in the surrounding rock undergoes a high-intensity sudden change, the self-positioning temporary patrol robot is mobilized to perform temporary support for the sudden stress change point of the surrounding rock and timely transmit a sudden stress change early warning signal to remind nearby workers to evacuate in time.