SOLUTION MINING A STABLE ROOF UNDER AN INERT GAS
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United States of America Patent
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Issued Date -
Jun 9, 2016
app pub date -
May 13, 2015
filing date -
Dec 9, 2014
priority date (Note) -
Abandoned
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Abstract
This method includes a solution mined underground salt cavern, wherein the salt cavern has a main body with a mean diameter of DN, and an upper portion comprising an inert gas pad, a stream of leaching water which is injected below the inert gas pad with a velocity V, thereby leaching an Nth tier adjacent to the upper portion having a height H1 and a mean diameter DN+1 that is smaller than DN by a ratio R raising the inert gas pad by an amount A1, providing a stream of leaching water which is injected below the inert gas pad with a velocity V, thereby leaching a N+1th tier adjacent to the Nth tier having a height H2 and a to a mean diameter DN+2 that is smaller than DN+1 by a ratio R, and repeating steps c and d a number of times T, thereby forming a stable roof.
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