Combustion air supply to in-situ retorts

Details Combustion air supply to in-situ retorts Combustion air supply to in-situ retorts

1978-05-23

1979-05-08

Purser, Ernest R.

Mining or in situ disintegration of hard material

Tunnel recovery of fluid material

299 19, E21C 4110

Patent

active

041532996

ABSTRACT:
An underground deposit of a carbonaceous material is retorted in an array of in-situ retorts arranged in a plurality of parallel rows. Each row of retorts is separated from adjacent rows by a pillar that extends unbroken for the length of the row. An apex drift extends longitudinally of each row and forms the crown of the retorts in that row. Combustion air for the retorting of the deposit in rubblized retorts in one row is supplied through the apex drift of an adjacent row. Delivery of combustion air into the crown of a retort for the retorting of the rubblized oil shale is through cross drifts from the apex drift of the adjacent row of retorts. Following combustion of the deposit in retorts in the first row, retorts are constructed and rubblized in a second row with the apex drift through which air had previously been supplied forming the crown of the retorts in the second row. Air for retorting deposit in the second row of retorts is delivered through a third apex drift.

REFERENCES:
patent: 3765722 (1973-10-01), Crumb
patent: 4072350 (1978-02-01), Bartel et al.

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