Title: Method of forming a rubblized in-situ retort

Abstract: An in-situ retort is formed in an oil shale deposit by a sublevel caving method in which the starting slot for the sublevel caving is at opposite ends of the retort on adjacent sublevels. Any zones of high permeability that are formed adjacent to the starting slots are limited in vertical extent to the vertical spacing of the sublevels and are spaced from the zones of high permeability in adjacent sublevels by the length of the retort. A source of channeling through the retort that is caused by the usual sublevel caving mining method is thereby eliminated.

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Inventors: Miller, J. Blaine (Englewood, CO, US)

Application Number: 882360
Filing Date: 1978-03-01
Publication_date: 1980-03-25
Assignee: Gulf Oil Corporation (Pittsburgh, PA)
Primary Class(es): 299/2 299/13, 299/19
Other Classes:
US Patent Ref:

3001776	Sep, 1961	Van Poollen	299/2.
4017119	Apr, 1977	Lewis	299/2.
4106814	Aug, 1978	French	299/2.

Other Refs: Other References: "SME Mining Engineering Handbook", 12.15--Sublevel Caving, pp. 12-222 to 12-233.