Molding pillars in underground mining of oil shale

Details Molding pillars in underground mining of oil shale Molding pillars in underground mining of oil shale

1982-02-05

1984-04-03

Purser, Ernest R.

Mining or in situ disintegration of hard material

Processes

Stabilizing underground structure

405267, E21C 4110

Patent

active

044404492

ABSTRACT:
An improvement in room-and-pillar mining of underground oil shale deposits in which: spaces between the pillars are filled with a fluid cementitious composition comprising spent oil shale and a binder to form floor-to-ceiling bodies of the composition; the bodies are allowed to harden to form support members for supporting the roof of the mine cavity; and the pillars are thereafter mined from the mine cavity.

REFERENCES:
patent: 4198097 (1980-04-01), Fondriest
patent: 4219237 (1980-08-01), Sisemore
Rose et al., "Proposed Coal Pillaring Procedure", etc. Society of Mining Engineering, Mar. 1979, pp. 291-297.

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