Channelling machine for cutting a preliminary groove around the

Details Channelling machine for cutting a preliminary groove around the Channelling machine for cutting a preliminary groove around the

1977-11-22

1979-01-16

Purser, Ernest R.

Mining or in situ disintegration of hard material

Hard material disintegrating machines

With mine roof-supporting means

299 15, 299 75, E21D 908

Patent

active

041346203

ABSTRACT:
A channelling machine for cutting a preliminary groove around the working face of a tunnel being excavated. A guide and drive track assembly comprising at least two guide rails and a drive rail displaceable into the immediate proximity of the working face. The guide and drive track assembly is disposed entirely inside a hollow support frame of cross-section complementary to that of the tunnel being excavated. The guide and drive track assembly also includes a back-up rail likewise disposed inside the support frame. Another guide and drive track assembly may be provided symmetrical to the first. The machine is braced against the walls by a plurality of front and rear hydraulic cylinders which also adjust the alignment of the machine in the tunnel. The machine is mounted for displacements on a cradle.

REFERENCES:
patent: 3325217 (1967-06-01), Enz
patent: 3537754 (1970-11-01), Valantin
patent: 3547493 (1969-05-01), Starkle

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