The servo pressurization and stabilization system acts as the foundation for accurate simulation by delivering precise control over seepage pressure. Its primary function is to maintain a constant, high-pressure environment—specifically within a range of 5.8 to 6.5 MPa—to establish a stable hydraulic gradient. This ensures the initial background stress state mimics real-world conditions before any mining activity is simulated.
Core Takeaway: This system ensures experimental validity by locking in a stable "pre-mining" stress state. Without this precise stabilization, subsequent simulations of mining disturbances would lack the necessary baseline accuracy.
Creating the Baseline Environment
Precise Pressure Regulation
The system allows researchers to exert exact control over seepage pressure. This control is vital for maintaining a consistent hydraulic gradient throughout the test material.
Replicating Deep-Earth Stress
To simulate deep mining conditions, the system holds pressure constant within a specific high-range window of 5.8 to 6.5 MPa. This replicates the intense background stress naturally found in subterranean environments.
Enabling Accurate Disturbance Simulation
The Prerequisite for Mining Activity
You cannot accurately simulate the settlement caused by mining without a stable starting point. This system ensures the "ground" is statically loaded before the actual experiment begins.
Facilitating Controlled Release
Once stability is confirmed, the simulation proceeds by releasing oil pressure in hydraulic pillows. This release mimics the physical disturbance of mining, but the validity of this step relies entirely on the stability established by the servo system first.
Critical Factors for Success
Sensitivity to Fluctuations
The system's value lies entirely in its ability to hold the 5.8 to 6.5 MPa range without deviation. Even minor fluctuations in pressure can disrupt the hydraulic gradient, rendering the initial stress state inaccurate.
Dependency on Calibration
The transition from the stabilization phase to the mining disturbance phase must be seamless. Any error in the initial pressurization can skew the data observed during the subsequent pressure release.
Ensuring Experimental Fidelity
To maximize the effectiveness of this system in your simulation work:
- If your primary focus is experimental setup: Ensure your equipment is calibrated to maintain the strict 5.8 to 6.5 MPa window to guarantee a valid baseline.
- If your primary focus is analyzing settlement data: Verify that the initial hydraulic gradient was stable prior to the release of oil pressure to confirm the data reflects true mining disturbance.
By locking in the initial stress state, the servo system transforms a simple pressure test into a realistic simulation of geological behavior.
Summary Table:
| Feature | Specification/Role | Impact on Simulation |
|---|---|---|
| Pressure Range | 5.8 to 6.5 MPa | Replicates deep-earth background stress |
| Primary Function | Stabilization | Establishes a valid "pre-mining" baseline |
| Control Mechanism | Servo-Regulated Seepage | Maintains consistent hydraulic gradient |
| Disturbance Method | Hydraulic Pillow Release | Accurately mimics mining-induced settlement |
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References
- Xu Han, Jian Zhang. Simulation test on shaft deformation induced by mining subsidence under similar gravity field in deep soil strata. DOI: 10.1007/s42452-024-05779-4
This article is also based on technical information from Kintek Press Knowledge Base .
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