Method and a device for feeding concrete into a drill hole in th

Details Method and a device for feeding concrete into a drill hole in th Method and a device for feeding concrete into a drill hole in th

1986-10-21

1988-03-22

Corbin, David H.

Hydraulic and earth engineering

Earth treatment or control

Chemical

405269, E21D 2002

Patent

active

047325097

ABSTRACT:
A method of feeding concrete into a drill hole in the concrete bolting of a rock, in which method a feeding hose is pushed into the hole and concrete is pumped into the hole through the feeding hose at the same time as the hose is drawn outwards within the hole. In order to ensure that the hole is filled properly, the amount of concrete pumped into the feeding hose for the distance the feeding hose is withdrawn, is greater than the concrete amount theoretically sufficient for filling an unbroken hole with concrete when the hose is withdrawn that distance. A device designed for the realization of the method comprises a primary pump which pumps concrete into a piston-type metering pump which in turn pumps the metered amount of concrete into the feeding hose in proportion as the feeding hose is withdrawn.

REFERENCES:
patent: 4116368 (1978-09-01), Smith
patent: 4514111 (1985-04-01), Issakainen
patent: 4643619 (1987-02-01), Issakainen

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