Device for breaking monolithic structures by pulsewise liquid pr

Details Device for breaking monolithic structures by pulsewise liquid pr Device for breaking monolithic structures by pulsewise liquid pr

1982-06-10

1984-05-22

Purser, Ernest R.

Mining or in situ disintegration of hard material

Expansible breaking-down devices

Fluid-pressed element

102304, 102333, 299 13, 299 16, E21C 3712

Patent

active

044497547

ABSTRACT:
A device for breaking monolithic structures or pulsating by inducing pressure in a liquid filling a pre-drilled hole in the monolithic structure to be shattered comprises a tubular housing having a cavity for accommodating an explosive charge. Provided in the lower portion of the housing is a partition of an elastomeric material and a pipe serving to locate the device in a mouth of the hole and be filled with the liquid so as to form an air gap between the partition and the surface of the liquid. In order to retain the device inside the hole a means is provided connected to the housing and fashioned as an inertia element disposed outside the hole.

REFERENCES:
patent: 318771 (1885-05-01), McCall
patent: 3960082 (1976-06-01), Sloevsky et al.

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