Title:
WALKING AND ADVANCING SYSTEM FOR SHIELD TIMBERING OR SHUMOKU TIMBERING
Document Type and Number:
Japanese Patent JPS5462101
Kind Code:
A
Abstract:
The invention relates to an advance mechanism for a roof support unit to be used in a longwall face of a mineral mining working. The advance mechanism comprises a hydraulic advance ram and guide means constituted by a guide rod means and a guide rail. One end of the guide rod means is attached to a conveyor extending along the longwall face, the other end of the guide rod means being attached to a guide element. The guide rail extends slidably through a guide aperture in the guide element and is pivotally attached to the floor sill of the roof support unit for pivotal movement in a vertical plane perpendicular to the longwall face. The hydraulic advance ram is attached to the guide element and acts on a member fixed to the floor sill.
Inventors:
RUBOMIRU PUREFUAKU
YUURUGEN DOTSUTO
YUURUGEN DOTSUTO
Application Number:
JP12279078A
Publication Date:
May 18, 1979
Filing Date:
October 06, 1978
Export Citation:
Assignee:
GEWERK EISENHUETTE WESTFALIA
International Classes:
C02F1/36; E21D23/08; (IPC1-7): E21D23/08