METHOD FOR STRENGTHENING OF CRACKED ROCKS Russian patent published in 2010 - IPC E21D1/16 E21D9/00 E02D3/12 

FIELD: mining.

SUBSTANCE: invention relates to mining, namely, to methods for injection strengthening of cracked rocks around mines with cement mortars. Method includes drilling of injection wells and drain wells around, injection of cement mortar into rocks via injection wells, filtering and removal of liquid phase of cement mortar via filtering material of drain wells, at the same time cement mortar liquid phase removal is carried out simultaneously and jointly with removal of gas medium from cemented cracks with smooth increase of underpressure value in drain wells. Underpressure value is maintained at the level that is not less than value of cement mortar injection pressure loss along length of filled crack, and process of filtering is continued after cement mortar injection is stopped until liquid phase stops leaking out from system of cracks.

EFFECT: invention makes it possible to maintain quality of rocks cementation as cement mortar flow is removed from the point of injection.