Injection technology and injection trials
systems engineering:
- Melting of the plastic
- Temperature control and conveying via heated hoses
Injection agent :
- single-phase, water-insoluble plastic
- Environmentally friendly
- Temperature dependence of viscosity
Injection strategy:
- Range control via injection temperature and injection rate
test setup:
- one-dimensional injection channel
- total length 7,5 m
Measurement:
- range
- Temperature field in the rock
- pressure development
Variations:
- Melt temperature
- injection rate
- gap geometry
- water backflow
Test results
Temperature field (left):
- Low heat penetration into the rock
- Calculatory traceability
rise in pressure (right):
- Exponential pressure increase over time
- low injection temperature leads to short ranges
