US 4,732,509 A · Method and a device for feeding concrete into a drill hole in the concrete boiling of a rock

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the hole is filled properly, the amount of concrete pumped into the feeding hose for the distance the feeding hose is withdrawn, is greater than the concrete amount theoretically sufficient for filling an unbroken hole with concrete when the hose is withdrawn that distance.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pump which in turn pumps the metered amount of concrete into the feeding hose in proportion as the feeding hose is withdrawn.

Claims10

Dependent claims

A method for feeding concrete into a drill hole in the concrete bolting of a rock, comprising the steps of:

pushing a feeding hose into a hole;
pumping concrete into the hole through the feeding hose;
and
drawing the feeding hose outwards within the hole in a synchronized manner with the pumping of concrete, said drawing normally being at a predetermined, continuous speed, wherein the amount of concrete pumped into the feeding hose for the distance the feeding hose is withdrawn is greater than the concrete amount which would fill an unbroken hole when the feeding hose is withdrawn said distance.

1 more element

Dependencies are inferred from the claim text.

Method and a device for feeding concrete into a drill hole in the concrete boiling of a rock

Life of this patent

Method and a device for feeding concrete into a drill hole in the concrete boiling of a rock

Life of this patent

Abstract

Claims10