Keys of electro-hydraulic control of support used for coal plough unit

Abstract

Structure of electro-hydraulic control system of support used for coal plough unit was introduced and keys of electro-hydraulic control of support as well as solutions were focused on including precision of support pushing, support quick-moving and optimal arrangement of tip-to-face distance. Application shows that the electro-hydraulic control system of support used for coal plough unit can precisely control automatic pushing-step of support with moving-forward time of 8 s, and there is no top off or rib spalling.

Keywords

• thin coal seam mining
• coal plough unit
• support
• electro-hydraulic control
• automatic pushing
• support quick-moving
• optimal arrangement of tip-to-face distance