Advance mechanism for mine roof support units
This patent describes a mineral mining installation consisting of a longwall conveyor, and of roof support units positioned side-by-side on the goaf side of the conveyor. Each roof support unit has a floor sill, and a respective advance mechanism positioned between the floor sills of each pair of adjacent roof support units. Each advance mechanism consists of a pair of parallel guide rods and a pair of parallel hydraulic advance rams. The guide rods of each advance mechanism are interconnected at one end by a head-piece attached to the conveyor. The guide rods of each advance mechanism are guided in guides attached to the two adjacent floor sills. The improvements described in this patent consist of positioning the guide rods of each advance mechanism beneath the associated hydraulic rams, of connecting the guide rods together by a bridge positioned between the associated head-piece and the other ends, and of providing the floor sills associated with the guide rods with brackets positioned between the bridge and the other ends of the guide rods.
- Assignee:
- Gewerkschaft Eisenhutte, Westfalia, Lunen
- Patent Number(s):
- US 4571127
- OSTI ID:
- 6084569
- Country of Publication:
- United States
- Language:
- English
Similar Records
Advance mechanism for a mine roof support unit
Advance mechanism for a mine roof support unit
Related Subjects
012000* -- Coal
Lignite
& Peat-- Mining
42 ENGINEERING
420206 -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
COAL MINING
CONTROL EQUIPMENT
CONVEYORS
EQUIPMENT
HAULAGE EQUIPMENT
HYDRAULIC CONTROL DEVICES
LONGWALL MINING
MATERIALS HANDLING EQUIPMENT
MECHANICAL STRUCTURES
MINE ROADWAYS
MINING
POSITIONING
POWERED SUPPORTS
ROOFS
SUPPORTS
TUNNELS
UNDERGROUND FACILITIES
UNDERGROUND MINING