Mining or in situ disintegration of hard material – Hard material disintegrating machines – Stepper-type advance-causing means
Patent
1978-07-28
1980-04-22
Purser, Ernest R.
Mining or in situ disintegration of hard material
Hard material disintegrating machines
Stepper-type advance-causing means
299 11, 299 33, E21C 2902
Patent
active
041991931
ABSTRACT:
The mining machine consists of a main frame having a front portion and a rearwardly extending portion, and cutter heads disposed for movement across the front portion for dislodging mineral. A conveyor system is provided which extends across of the front of the main frame and along the rearwardly extending portion thereof for carrying dislodge mineral from the mine face. Forward roof support jacks, which are attached to the main frame for unitary movement therewith, provide temporary roof support as the entry is being formed. Rear roof support jacks, disposed behind the forward roof support jacks, also provide temporary roof support. Sumping cylinders, which are disposed generally parallel to the mine floor, connect the rear roof support jacks to the main frame and are used for moving the mining machine. The sumping cylinders are connected to the main frame with a universal joint connection to permit free movement of each sumping cylinder around its point of connection to the main frame. Steering cylinders, for positioning the sumping cylinders, are connected between each sumping cylinder and the main frame. Pivot jacks are provided on the main frame that extend to provide a pivot point around which the main frame can be moved by extending the sumping cylinders. The mining machine includes roof bolters, attached to the rear roof supports, for installing a series of roof bolts as the machine advances. Rib cleaners are provided for cleaning the mine ribs as the machine forms the entry.
REFERENCES:
patent: 2916274 (1959-12-01), Haworth et al.
patent: 3169796 (1965-02-01), Long et al.
patent: 3314723 (1967-04-01), Mennekes
patent: 3363945 (1968-01-01), McLaughlin et al.
patent: 3677603 (1972-07-01), Small
patent: 3995905 (1976-12-01), Jamison
patent: 4131317 (1978-12-01), Jamison et al.
"New Techniques on Short Wall Faces and Headings", by F. Small, Mining Tech., Apr. 1971, pp. 7-16.
Damron Earl M.
Lipps Jack I.
Acme Machinery Company
Purser Ernest R.
Yeager Robert D.
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