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Gas Migration in EBS and Geosphere (GMT)
Excavation of the EBS - Depressurisation of the GMT Cavern |
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During the course of the experiment, the GMT cavern and the EBS
were pressurised to around 600kPa by continuous water injection
into the backfill. Depressurisation of the cavern was achieved by
stepwise reduction of water injection into backfill and a controlled
extraction of water from the backfill and silo.
In total some 30m3 of water was
removed during the dewatering stage.
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