Method and apparatus for drilling a tunnel
OwnerValto Ilomakiinventor
Life of this patent
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Abstract
A method for drilling a tunnel in rock which utilizes a drilling apparatus comprising a drill head having tools therein and at least one conveying tube is disclosed. The method utilizes roller units which support the conveying tube to transmit the forward driving force from a power unit at the rear end of the apparatus to the drill head.
Claims9
In an apparatus for drilling a tunnel in rock, said apparatus comprising a drill head comprising a drum section and at least one drilling tool, a conveying drum connected to said drill head, and a power unit positioned at a rear end of said conveying drum for supplying a forward driving force to said apparatus, the improvement which comprises at least one roller unit positioned between an exterior surface of said conveying drum and a tunnel wall for supporting said conveying drum, said at least one roller unit contacting said drum section at a first end thereof and said power unit at a second end thereof for transmitting said forward driving force from said power unit to said drill head.
Dependencies are inferred from the claim text.