Soft rock shear rheological test system with simulation of coupled rainfall seepage and blasting vibrations
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Solution Overview
Problem
Existing rock shear rheological test systems face challenges in simulating the coupled effects of rainfall seepage and blasting vibrations, including inefficient specimen disassembly, difficulty in simulating dry-wet cycles, specimen deflection, sliding friction, and the inability to accurately apply cyclic vibration loads, which affects test accuracy and efficiency.
Innovation Solution
A soft rock shear rheological test system with a loading device and shear box design that includes a frame with electric cylinders, a shear box with a vertical roller shaft for tangential movement, and a water/air channel system for high-pressure water injection and air compression to simulate rainfall seepage and blasting vibrations, reducing friction and enabling quick dry-wet cycles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high-pressure water is injected via a single hole in radial flow form, then seepage effect is achieved, but test efficiency is reduced due to tedious disassembly process
Solution Approach 1:
The single injection hole is divided into multiple injection holes (at least two) arranged in the cavity. This segmentation allows water to be injected simultaneously through multiple holes, achieving the required seepage effect while enabling faster assembly and disassembly operations, thereby improving test efficiency without compromising seepage simulation accuracy.
2Reliability
If high-pressure water is injected to increase water content, then rainfall seepage effect is simulated, but dry-wet cycle simulation is difficult due to inability to quickly dry the specimen
Solution Approach 1:
The injection holes serve dual functions: they are used to inject high-pressure water for simulating rainfall seepage, and they are also used to inject air for drying the specimen. This multi-functionality of the injection holes enables the system to efficiently perform both wetting and drying operations, making dry-wet cycle simulation feasible and improving the system's adaptability.
3Device complexity
If constant size cavity is used to place rock specimen, then structure is simple, but specimen deflection occurs during shearing process affecting test accuracy
Solution Approach 1:
The cavity size is made adjustable rather than fixed. The cavity can be adjusted to match different specimen sizes and shapes, ensuring that the specimen is properly supported during shearing and preventing deflection. This dynamic adjustment capability maintains test accuracy while avoiding the complexity of an overly complex fixed structure.
4Ease of operation
If upper and lower shear boxes are used, then shearing test is enabled, but sliding friction causes energy loss and inflates measured shearing strength
Solution Approach 1:
A lubricating layer or intermediary substance is introduced between the upper and lower shear boxes to reduce sliding friction. This intermediary layer allows the shear boxes to move smoothly during the shearing test, minimizing energy loss and ensuring that the measured shearing strength reflects the actual strength of the specimen rather than being inflated by frictional forces.
5Device complexity
If cyclic vibration load is not applied, then test system is simple, but blasting vibration effects cannot be simulated under actual working conditions
Solution Approach 1:
A vibration device is integrated into the test system to apply cyclic vibration loads during the shearing test. This vibration device simulates the blasting vibrations that occur in actual mining conditions, enabling the system to accurately reproduce the coupled effects of rainfall seepage and blasting vibrations on the rock specimen, thereby improving the reliability of the test results.
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 improves test efficiency and accuracy by allowing quick specimen preparation and replacement, reducing friction, and accurately simulating the effects of rainfall seepage and blasting vibrations, resulting in more consistent and reliable test results.
Implementation Method 1
a shear box with a vertical roller shaft for tangential movement
Implementation Method 2
a water/air channel system for high-pressure water injection and air compression to simulate rainfall seepage
Implementation Method 3
air compression to simulate rainfall seepage and blasting vibrations
Data Source
AI summary
The disclosure relates to a soft rock shear rheological test system with simulation of coupled rainfall seepage and blasting vibrations, which is at least provided with a loading device and a shear box. The loading device includes a frame (2), a normal static load electric cylinder (1) disposed on a top of the frame (2) and a normal dynamic load electric cylinder (16) disposed on a lower portion of the frame (2), a horizontal static load electric cylinder (5) and a horizontal dynamic load electric cylinder (12) disposed on both sides of the frame (2), and a reaction post (10). This test system can perform a dry-wet cycle operation on the test specimen without disassembling the shear box during the shear rheological test, and can truly simulate influences of rainfall seepage and blasting vibrations on the shear rheological effect of soft rock.