Mining method for co-extraction of non-combustible ore and mine methane
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United States of America Patent
Stats
-
Jun 3, 2014
Grant Date -
Dec 24, 2009
app pub date -
Jun 19, 2009
filing date -
Jun 20, 2008
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A method for co-extracting non-combustible ore (e.g., trona) and methane from an underground formation comprising at least one methane-bearing layer and a non-combustible ore bed having a rock roof, comprising:
- providing a well having a downhole end positioned above the ore bed roof;mining an ore region from an initial cavity and removing the mined ore, thereby creating a subsequent cavity;advancing the mining step to another ore region from the subsequent cavity;allowing the roof of the initial cavity to cave so as to create a gob;repeating the mining, advancing and caving steps, the caving being effective in generating fluid communication between the gob and the well downhole end and in fracturing the methane-bearing layer so as to release methane into the gob; andrecovering a gob gas comprising released methane through the well to the surface.
First Claim
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International Classification(s)
- 2009 Application Filing Year
- E21F Class
- 19 Applications Filed
- 14 Patents Issued To-Date
- 73.69 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 1 Citation Count
- E21F Class
- 9.09 % this patent is cited more than
- 11 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Dec 3, 2025 |
