CONTROLLING THE FEEDING BEAM OF A ROCK DRILL

• Main Authors: JUHA PIIPPONEN, OSSI TIENARI
• Format: Patent
• Language: English
• Published: 22.09.1988
• Edition: 4
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

A method of and an arrangement for controlling rock drilling when a feeding beam (3) is displaced so that the forward end thereof makes contact with a rock surface to be drilled. The arrangement comprises a displacing device for displacing the feeding beam in the longitudinal direction thereof and a control device for controlling the operation of the displacing device. The control means comprise a control element which is mounted at the forward end of the feeding beam (3) so that when the feeding beam is displaced in the longitudinal direction, the control element is the first to make contact with the rock surface. The control element is connected to stop the operation of the displacing device of the feeding beam (3) when it hits the rock surface. The control element further comprises a detecting element (10) formed by a sleeve-like support and mounted slidably in the longitudinal direction of the feeding beam (3), which detecting element is displaced backwards with respect to the feeding beam (3) when it hits the rock surface; and a spring (12) which pushes the detecting element (10) to its forward position; and a detector (15) which detects the displacement of the element (10) and is connected to control the displacing device of the feeding beam (3).