Method of breaking free-standing rock boulders

Details Method of breaking free-standing rock boulders Method of breaking free-standing rock boulders

1974-12-11

1976-06-15

Purser, Ernest R.

Mining or in situ disintegration of hard material

Processes

Explosive

89 1C, 102 23, 175 45, 241 27, 241 30, E21C 3700

Patent

active

039632750

ABSTRACT:
Free-standing boulders or rocks are fractured and broken down into many smaller pieces by impacting the boulder with a high velocity projectile. The impact energy is delivered to the rock by a blunt nosed projectile in a time which is less than the transit time of a sound signal across the average diameter of the rock.

REFERENCES:
patent: 3404847 (1968-10-01), Smith
patent: 3695715 (1972-10-01), Godfrey
"High Velocity Impact in Comminution", Mining Engineering, Oct. 1956, pp. 1028-1032.

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