Process and device for blocking a well opening out in the ceiling of an underground cavity for low temperature storage

摘要

To block the mouth of a well (1) opening out in the ceiling of an underground cavity (2), a part (4) in the shape of a keystone is used, which has a hole through the middle for the passage of pipes (31, 32), suitable cements are then poured in to make the whole system integral, and the well is filled.