HYDRAULIC SITE FOR COAL SEAM MINING WITH UNDERGROUND CLOSED-CYCLE WATER SUPPLY Russian patent published in 2014 - IPC E21C45/00 

FIELD: mining.

SUBSTANCE: invention relates to mining and can be used for hydraulic process of coal production. Main and auxiliary openings are driven via tandem and/or single faces that delineate blocks, barrier and safety pillars. Water is forced into faces by pump stations after cleaning at drainage complexes, mechanised settlers and/or water headers. The latter are located in intercommunicated chambers located at lower points of hydraulic site blocks and exiting into accumulation openings via which hydraulic transport is performed and rock is discharged. Abandoned pillars are liquidated after working of extraction pillar at backstroke in tow-side or single-side cuts. Water is cleaned at mechanised settlers and/or water headers with application of combination of water cleaning technical means and processes. For this, used are, for example, water impermeable partitions with water bypass nearby bottom, thin-layer clarifiers, flotation, coagulation, water processing by constant pulsating current, etc.

EFFECT: working of coal at complex mining and geological conditions, lower costs.

4 cl, 2 dwg