PEAT PRODUCTION METHOD Russian patent published in 2006 - IPC E21C49/00 

FIELD: open-pit mining for obtaining peat.

SUBSTANCE: method involves prior dewatering peat deposit; serially excavating peat from separate zones for depth equal to peat deposit thickness; installing caisson with watertight walls to isolate zone having volume equal to that of caisson from remainder peat deposit; pumping out water from peat deposit zone isolated by caisson to dewater peat inside caisson; removing peat from caisson along with retaining of cut upper horizontal ground forming layer; taking out caisson from excavated zone and diverting water from adjacent zones to above excavated zone; filling hole created in place of previous caisson location with cut upper horizontal ground-forming layer; reinstalling caisson in adjacent zone and repeating above peat production operations.

EFFECT: increased output due to reduced time of prior peat deposit dewatering, reduced peat drying time due to production of peat mass having lesser moisture content and possibility to maintain natural water balance of surrounding territory.