3D Rock Burst Simulation System with Integral Frame and Dynamic Loading
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Solution Overview
Problem
Current large-scale three-dimensional physical model test devices for rock bursts have limitations in high stress loading capacity, three-dimensional stress coordination, multi-source dynamic disturbance simulation, local high stress environment reconstruction, and excavation method simulation, which hinder the effective simulation of various rock burst types and factors in deep engineering projects.
Innovation Solution
A large-scale three-dimensional physical simulation test system incorporating a three-dimensional static stress loading device, 3D printer, CO2 blast cracking device, split Hopkinson pressure bar, miniature rotary excavation mechanical arm, drop hammer impact device, hydraulic oil source, and controller, with advanced hydraulic actuators and sensors for synchronized stress application and intelligent perception, enabling high stress loading, multi-source dynamic disturbance simulation, and accurate stress environment recreation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional steel plate welding-bolt splicing frame structure is used, then device complexity is reduced, but stress loading capacity and rigidity are insufficient
Solution Approach 1:
The patent merges multiple steel plates into an integral frame structure through welding, eliminating the need for bolt splicing connections. This integration strengthens the overall frame rigidity and stress loading capacity while reducing the number of separate components, thus resolving the contradiction between strength and device complexity.
Solution Approach 2:
The patent employs composite construction by integrating steel plates with concrete infill in the frame structure. This composite approach enhances the overall strength and rigidity of the frame, allowing it to withstand higher stress loads while maintaining structural integrity, thereby improving stress loading capacity without proportionally increasing complexity.
2Ease of operation
If single-acting jacks are used for loading, then ease of operation is improved, but three-dimensional stress coordination and loading precision deteriorate
Solution Approach 1:
The loading system is segmented into multiple independently controllable hydraulic actuators positioned at different locations on the frame. Each actuator can be controlled separately to apply precise forces in specific directions, enabling accurate three-dimensional stress coordination while maintaining operational simplicity through individual control of each segment.
Solution Approach 2:
The patent transitions from single-acting (one-dimensional) jacks to multi-axial hydraulic actuators that can apply forces in multiple directions simultaneously. This dimensional enhancement allows precise control of three-dimensional stress states on the model, improving stress coordination precision while maintaining ease of operation through centralized control system.
3Power
If low-frequency hydraulic actuators are used, then power output is sufficient, but dynamic disturbance simulation capability deteriorates
Solution Approach 1:
The patent employs hydraulic actuators with dynamic control capabilities that can adjust their operating frequency and amplitude in real-time. This dynamic adaptability allows the system to simulate various disturbance scenarios including high-frequency vibrations and impact loads while maintaining sufficient power output, thus resolving the contradiction between power and simulation versatility.
Solution Approach 2:
The system utilizes hydraulic actuators whose operating parameters (frequency, amplitude, phase) can be changed dynamically during operation. This parameter variability enables the actuators to transition between low-frequency high-power modes and high-frequency disturbance simulation modes, achieving both sufficient power output and enhanced adaptability for different simulation requirements.
4Reliability
If in-situ micro seismic monitoring is used, then construction safety is improved, but repeatability and mechanism understanding deteriorate
Solution Approach 1:
The patent creates a scaled physical model that copies the essential features and stress conditions of deep rock engineering environments. By conducting controlled experiments on this replica system with embedded sensors, the study achieves repeatable measurements of rock burst mechanisms while the full-scale in-situ monitoring continues to provide safety assurance, thus resolving the contradiction between safety and measurement precision.
Solution Approach 2:
The physical model testing performs preliminary experiments under controlled conditions before actual deep engineering construction. This preliminary action allows detailed measurement and understanding of rock burst mechanisms in a safe environment, while the full-scale in-situ monitoring system provides ongoing safety assurance during actual construction, thus resolving the contradiction between safety and mechanism measurement precision.
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 achieves high stress loading capacity, consistent stress distribution, effective simulation of multi-source disturbances, and realistic excavation processes, enhancing the simulation of rock burst mechanisms and providing intelligent perception for rock burst information, thereby improving prediction and prevention capabilities.
Implementation Method 1
CO2 blast cracking device
Implementation Method 2
CO2 blast cracking device
Implementation Method 3
split Hopkinson pressure bar device
Implementation Method 4
split Hopkinson pressure bar device
Implementation Method 5
drop hammer impact device
Implementation Method 6
drop hammer impact device
Implementation Method 7
three-dimensional static stress loading device
Implementation Method 8
hydraulic actuators
Implementation Method 9
acoustic emission probes
Implementation Method 10
dynamic fiber grating
Data Source
AI summary
The invention relates to a large-scale three-dimensional physical simulation test system for the whole development process of deep engineering rock burst. A CO2 blast cracking device, a dynamic fiber grating and ultrasonic probes are pre-embedded in a physical model sample of similar materials. Acoustic emission probes are pre-mounted on the boundary of a sample. A tunnel excavated in the sample is provided with a three-way acceleration sensor and an industrial endoscope. A sample 3D printer and a drop hammer impact device are arranged outside the three-dimensional static stress loading device. A hydraulic oil source and a controller are arranged outside the three-dimensional static stress loading device and mounted on the ground. The controller is connected with a computer.