Rock Coal Permeability Coefficient Tester
Working principle
Based on Darcy's Law, the permeability coefficient is calculated by measuring the steady-state flow rate of a fluid under a constant pressure gradient.
Application area
Geological Engineering: Evaluating the rock permeability of oil and gas reservoirs, geothermal extraction, and nuclear waste disposal facilities.
Civil Engineering: Rock Mass Seepage Characteristics in Tunnel and Slope Stability Analysis.
Research and Teaching: Experimental Research in Rock Mechanics and Hydrogeology.
Standard specifications:
Follow international standards such as ASTM D4525 and ISO 17313.
Parameter
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Variety |
Name |
Parameter |
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1 |
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Maximum test force |
2000KN.（300KN;1000KN） |
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Accuracy class |
Level 1 |
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2 |
Load parameters |
Test force measurement range |
0.4%～....FS（Full range） |
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Test force indication error |
示值的±0.5% |
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Test force resolution |
± 1/300000 of the maximum test force, no gear division throughout the entire process, and constant resolution throughout the entire process |
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3 |
Control parameters |
Range of force control rate adjustment |
0.005～5%FS/s |
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Force control rate control accuracy |
When the speed is less than 0.05% FS/s, it is within ± 2% of the set value, and when the speed is greater than or equal to 0.05% FS/s, it is within ± 0.5% of the set value； |
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Test bench speed adjustment range |
0.1～250mm/min |
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Test bench speed control accuracy |
Within ± 0.2% of the set value |
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control range |
0.5%～....FS |
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control accuracy |
When the set value is ≥ 10% FS, it is within ± 0.5% of the set value. When the set value is ＜ 10% FS, it is within ± 1% of the set value |
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4 |
Host Parameters |
External dimensions |
910×400×1200mm |
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Maximum stroke of oil cylinder piston |
150mm |
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Maximum distance between upper and lower pressure plates |
450mm |
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Power |
380V/50Hz，±10% |
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Weight |
900Kg |
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5 |
Surrounding pressure |
0～20MPa±0.02kPa Adjustable settings, LCD display |
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6 |
Permeation reverse pressure water pressure |
0～60MPa±0.02kPa Adjustable settings, LCD display |
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7 |
Test specimen |
￠50mm×100mm ；￠25mm×100mm；Specialized rubber film; Other sizes can also be optionally selected |
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8 |
Permeability coefficient acquisition instrument |
Water output accuracy: 0.2ml; Automatic data collection; real time display。 |
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9 |
triaxial cell |
Thick walled seamless steel material, capable of withstanding high pressure |
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