Abstract: A method of aligning the feeding beam (6) of a rock drilling equipment by gravity-operated sensors (7x, 7y) indicating the inclination of the feeding beam (6). In the method, the angle values (.alpha., .beta.) of the feeding beam (6), indicating by the sensors (7x, 7y) are corrected so that they correspond to the actual angles of inclination of the feeding beam (6). The rock drilling equipment comprises two gravity-operated angle sensors (7x, 7y) measuring inclination in two planes perpendicular to each other. The equipment further comprises a calculator (8) which calculates a difference between the angle value of one angle sensor (7x, 7y) and the actual angle of inclination of the feeding beam (6) in the direction in question on the basis of the angle value obtained by the other angle sensor (7y, 7x) and corrects the value so that it corresponds to the actual inclination of the feeding beam.

Abstract: A method, a rock drilling equipment (1) a measuring device (10) for aligning a feeding beam (5) in the rock drilling equipment (1) with a drilling direction. In the method, an angle Sg(g) between the drilling direction (S.sub.p) and a direction (S.sub.t) defined by a fixed point selected as a point of sight (T) is measured and stored in a memory, and the feeding beam (5) is adjusted at the following holes so that it is positioned at an angle .beta. corresponding to the drilling direction (S.sub.p) measured with respect to a direction (S.sub.a) of a carrier (1a) by means of the point of sight (T). The measuring device (10) comprises two mutually turntable discs (11, 12) of which one is positioned to indicate the drilling direction (S.sub.p) and the other is turned in such a way that its measuring line points towards a fixed point serving as a point of sight (T), thus defining a reference line (S.sub.t).

Abstract: The invention relates to a method of drilling holes in rock. In the method, holed (4a-4n, 6a-6n) are drilled in the rock (5) in order to break it into a desired shape. To drill the holes, the drill bit of a rock drilling equipment is positioned successively at the starting points of the holes at the ends of the rows of holes (4a-4n, 6a-6n) to be drilled, and the starting points of the holes are stored in the memory of a control unit provided in the rock drilling equipment. The control unit then calculates the position of the other holes in the row of holes on the basis of the end holes (4a, 4n, 6a, 6n) of the row and drills the holes automatically on the basis of preset drilling parameters, such as direction and depth.