METHOD AND APPARATUS IN TUNNELLING

PCT No. PCT/SE79/00223 Sec. 371 Date Jul. 3, 1980 Sec. 102(e) Date Jun. 23, 1980 PCT Filed Nov. 1, 1979 PCT Pub. No. WO80/01003 PCT Pub. Date May 15, 1980.Disclosed is a method for marking out drill holes in accordance with a predetermined drill hole pattern. A direction reference beam (c) is projec...

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Hauptverfasser:	BIEDERMANN K, NORDGREN B, AKERLIND B
Format:	Patent
Sprache:	eng
Schlagworte:	AMMUNITION BLASTING EARTH DRILLING FIXED CONSTRUCTIONS GALLERIES GYROSCOPIC INSTRUMENTS HEATING LARGE UNDERGROUND CHAMBERS LIGHTING MEASURING MEASURING DISTANCES, LEVELS OR BEARINGS MECHANICAL ENGINEERING MINING NAVIGATION PHOTOGRAMMETRY OR VIDEOGRAMMETRY PHYSICS SHAFTS SURVEYING TESTING TUNNELS WEAPONS
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Zusammenfassung:	PCT No. PCT/SE79/00223 Sec. 371 Date Jul. 3, 1980 Sec. 102(e) Date Jun. 23, 1980 PCT Filed Nov. 1, 1979 PCT Pub. No. WO80/01003 PCT Pub. Date May 15, 1980.Disclosed is a method for marking out drill holes in accordance with a predetermined drill hole pattern. A direction reference beam (c) is projected in a direction defining the direction of the tunnel and part of a beam (e) is deflected from the reference beam, the part of the beam is passed to a beam derivating means (d2) by means of which the part beam is directed in accordance with a predetermined drill hole pattern onto the rock surface (4) to present thereon images of the part beam at locations of intended drill holes. Correspondingly, a device for executing said method comprises means (d1) for deflecting at least part of a direction reference light beam (c) to form part of a beam (e), and means (d2) to direct the part of the beam onto locations of drilling holes for explosives in accordacne with a predetermined pattern.