Mining or in situ disintegration of hard material – Hard material disintegrating machines – Stepper-type advance-causing means
Patent
1976-11-29
1978-12-26
Purser, Ernest R.
Mining or in situ disintegration of hard material
Hard material disintegrating machines
Stepper-type advance-causing means
299 11, 299 33, 299 57, 299 75, 299 87, E21C 2506, E21C 2552, E21C 2922, E21D 1544
Patent
active
041313178
ABSTRACT:
The mining machine has a body portion mounted on a pair of endless propelling tracks which advance the mining machine forwardly in the mine. Pairs of forwardly extending arm members are pivotally connected to the body portion and support at their end portions a skid plate which is positioned transversely across the body portion and arranged to rest on and slide over the mine floor. A first conveyor is supported by the skid plate and receives and directs dislodged material from the mine floor to a second conveyor connected to the end portion of the first conveyor. The second conveyor discharges the dislodged material to the rear of the body portion. A support frame is positioned on the skid plate and horizontally supports a pair of transverse guide rails at the front end of the body portion. A carriage is slidably mounted for transverse movement on the guide rails and includes a rotatable supporting shaft. A transverse support arm having axial spaced cutter shafts positioned thereon is secured to and rotatable with the supporting shaft. Forward movement of the body portion sumps the rotating cutter shafts into the mine face and by rotating the supporting shaft and feeding the carriage laterally on the guide rails a rectangular section is cut from the face. A first roof supporting apparatus supported by the body portion includes a vertically movable beam member arranged to engage the mine roof. A second roof supporting apparatus having vertically movable beam members is connected by piston cylinder assemblies to the body portion and is independently operable of the first roof supporting apparatus to support the mine roof when the first roof supporting apparatus is removed from engagement with the mine roof and advances forwardly with the body portion.
REFERENCES:
patent: 2920879 (1960-01-01), Driehaus
patent: 3387892 (1968-06-01), Fischer et al.
patent: 3647262 (1972-03-01), Kacmarcy
patent: 3677603 (1972-07-01), Small
patent: 3879088 (1973-09-01), Sodder et al.
Fleck Henry
Jamison Will B.
Consolidation Coal Company
Mikesell, Jr. William A.
Pate III William F.
Price, Jr,. Stanley J.
Purser Ernest R.
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