Coalbump Test Chamber With Shear Loading for Fault Dislocation
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Solution Overview
Problem
Existing testing devices for simulating coalbump cannot generate shearing force on test specimens, preventing physical simulation tests under disturbed shear dynamic loads caused by fault dislocation.
Innovation Solution
A testing device with a pair of coaxial oil cylinders and a shear loading unit generates shearing force on the test specimen by synchronously moving piston rods, allowing simulation under disturbed shear dynamic loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a testing device with only compression loading units (first, second, third oil cylinders) is used, then ground stress simulation is achieved, but shearing force cannot be generated on the test specimen
Solution Approach 1:
The loading system is segmented into independent compression loading units (first, second, third oil cylinders) and a shear loading unit (fourth and fifth oil cylinders). Each unit can be controlled independently, allowing the shear loading unit to generate shearing force while the compression units maintain ground stress simulation.
Solution Approach 2:
The testing device is designed with multi-functional loading units that can perform both compression and shearing operations. The fourth and fifth oil cylinders, when configured in specific spatial relationships with the test specimen, can generate shearing force in addition to the compression capabilities provided by the first three oil cylinders.
2Adaptability or versatility
If the fourth and fifth oil cylinders are positioned coaxially, then shearing force generation capability is achieved, but device structure becomes more complex
Solution Approach 1:
The solution transitions from a single-dimension compression loading approach to a multi-dimensional loading approach by introducing the fourth and fifth oil cylinders in a coaxial arrangement. This spatial configuration enables shearing force generation through differential movement of the piston rods along the same axis, adding a new dimension of loading capability.
3Productivity
If manual loading of test specimens is performed, then operation simplicity is maintained, but labor force requirement increases
Solution Approach 1:
The testing device incorporates a test specimen carrier that automatically transports the test specimen to the loading position. This self-service mechanism eliminates the need for manual handling and positioning of specimens, reducing labor requirements while maintaining operational simplicity through automated carrier movement.
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 physical simulation of coalbump under fault dislocation conditions, with improved loading convenience and reduced labor requirements.
Implementation Method 1
Pressure is applied onto a cube test specimen by hydraulic pressure of the oil cylinder
Implementation Method 2
a shear loading unit including a fourth oil cylinder and a fifth oil cylinder... the fourth piston rod of the fourth oil cylinder and the fifth piston rod of the fifth oil cylinder stretch or retract along the X direction, Y direction or Z direction
Data Source
AI summary
A testing device for simulating coalbump includes a testing chamber. A first oil cylinder, a second oil cylinder and a third oil cylinder are provided within the testing chamber; each piston rod of each oil cylinder can stretch or retract. A first reaction seat, a second reaction seat and a third reaction seat are arranged opposite to a side of the first piston rod of the first oil cylinder, a side of the second piston rod of the second oil cylinder and a side of the third piston rod of the third oil cylinder respectively. The testing device includes a shear loading unit including a fourth oil cylinder and a fifth oil cylinder located on a same axis, and a side of a fourth piston rod of the fourth oil cylinder and a side of a fifth piston rod of the fifth oil cylinder are arranged opposite to each other.