Overburden removal method with blast casting and excavating appa

Details Overburden removal method with blast casting and excavating appa Overburden removal method with blast casting and excavating appa

1993-10-15

1995-05-09

Nelson, Peter A.

Ammunition and explosives

Blasting

Terrain clearance

F42D 300

Patent

active

054130476

ABSTRACT:
Coal and other mineral seams are uncovered of overburden to a predetermined width by blast casting a portion of the overburden into an adjacent spoil pit followed by fragmentation blasting of the remaining width of the overburden panel. A dragline excavator is moved at least partially onto the fragmented overburden for excavating a keycut portion together with excavation to level the bench for an adjacent overburden panel and placement of the material on a temporary spoil pile.

REFERENCES:
patent: 5140907 (1992-08-01), Syatek
patent: 5194689 (1993-03-01), Cummins

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