Abstract: A method for weighing a payload of a transport vehicle, a transport vehicle and a bogie structure. Vertical loads exerted on wheel suspension of the transport vehicle are measured with sensors and the measurement data is conveyed to a calculating unit of weighing. Further, on a side surface of a horizontal arm belonging to the bogie structure there is arranged a sensor for measuring the vertical load exerted on the horizontal arm.

Abstract: A method for sucking dust in connection with a rock drilling rig, and a rock drilling rig. The rock drilling rig (1) comprises a dust collection system provided with a suction device (11) to produce suction for sucking dust from a drill hole (8) through a first suction channel (12). The rock drilling rig further comprises a second suction channel (17) allowing the suction effect of the dust collection system to be utilized for sucking dust from a location other than the drill hole, for example from the control cabin (15). Exhaust suction is controlled by means of a control unit (26, 48).

Abstract: The invention relates to a rock drill apparatus comprising a feed beam (1) and a rock drill machine moving to-and-fro therealong, a pressure fluid driven feed cylinder (4) which, by means of a flexible transfer element, is connected so as to transfer the rock drill machine in the longitudinal direction of the cylinder, the feed beam (1) being provided with a space in its longitudinal direction wherein the feed cylinder (4) is installed. The rock drill apparatus comprises a measuring device comprising a measuring wheel (7a) for a measuring line (9), the measuring wheel (7a) being connected to rotate a measuring sensor of the measuring device.

Abstract: A method and a system for monitoring the location of a mining vehicle in a mine. The mine includes a first and a second work area. At least one identifier whose exact location is known is arranged in the first work area. The location of the mining vehicle is determined continuously by use of a dead reckoning. The location data, based on the dead reckoning, can be updated by use of the identifier. The location data are transmitted to a mine control system for monitoring the mining vehicle.

Abstract: A method for loading a dumper with broken rock or the like and an apparatus for implementing the method. In the method, a loading area is defined for the dumper. The dumper is stopped at the loading area at a predefined position for loading. An emptying area is correspondingly defined in advance for a loader for transporting the material in its bucket onto the dumper box. The apparatus includes a controller for controlling the dumper at least during loading, and the controller includes means for stopping the dumper for loading at the predefined position so that the material transported by the loader can be emptied onto the dumper box in a predefined location in the longitudinal direction.

Abstract: The invention relates to a method and a rock drilling rig for drilling a hole in a rock. In the method the hole is drilled with a so-called top-hammer rock drilling rig including a drill rod and a cone roller bit at the end of the drill rod. During drilling with the percussion device, stress pulses of low amplitude are produced at a high frequency of at least 200 Hz. In the rock drilling rig, the cone roller bit (3) at the end of the drill rod and the percussion device are configured to feed stress pulses of low amplitude, at the frequency of at least 200 Hz, via the drill rod and the cone roller bit to the rock.

Abstract: The invention relates to a method of measuring a stress wave and to a measuring device and a rock breaking device. A percussion device (7) gives impact pulses to a waveguide (21), where a compression stress wave and a reflected tensile stress wave are generated, which propagate in the waveguide. The compression stress wave causes an extension in the waveguide and the tensile stress wave a thinning, in which case properties of the waveguide may be determined by measuring geometric changes in the cross section of the waveguide. The measurement data are utilized in controlling the rock breaking device.

Abstract: The invention relates to a method of quarrying dimensional stone and to a line drilling apparatus used therein. The drilling apparatus (8) is frameless and comprises a first boom (11) and a second boom (12), between which is arranged a joint mechanism (13), allowing the booms to be moved relative to each other. Furthermore, in connection with the joint mechanism is arranged a stone support (14) adaptable against the stone once the drilling apparatus is coarse-positioned in the vicinity of a drill hole line (6). Fine positioning of the drilling apparatus in the direction of the drill hole line is performed by joints comprised by the joint mechanism. Positioning at drill holes (7) takes place by turning the second boom (12) along an arched motion path and by turning the drilling unit (15) towards the stone to be drilled.

Abstract: The invention relates to an arrangement for employing a drill steel centralizer (6) travelling on a feed beam (1) of a rock drill machine (2). The drill steel centralizer (6) has a pressure fluid-operated actuator for closing a transfer opening intended for a drill rod (4) during drilling, whereby pressure fluid is fed into the actuator during drilling.

Abstract: A method and a storage device including a software product for modifying a drilling pattern, and a rock drilling rig. One or more holes whose location is to be changed may be selected from a drilling pattern prior to drilling. The hole is assigned a new location by means of a drilling unit and, subsequently, the drilling pattern is updated.

Abstract: A method and a system for monitoring the location of a mining vehicle in a mine. The mine comprises a first and a second work area. At least one identifier (29) whose exact location is known is arranged in the first work area (18a). The location of the mining vehicle (1) is determined continuously by means of a dead reckoning. The location data, based on the dead reckoning, can be updated by means of the identifier. The location data are transmitted to a mine control system for monitoring the mining vehicle.

Abstract: A method and software product for controlling a percussion device belonging to a rock-drilling machine, and a percussion device. The impact frequency of the percussion device is set so that the percussion device forms a new compression stress wave to the tool always when reflected waves from the previous compression stress waves reach a first end of the tool. This requires that the impact frequency be set proportional to the propagation time of the stress wave, whereby the length of the used tool and the propagation velocity of the stress wave in the tool material are to be noted.

Abstract: A telescopic feed beam for a rock drill includes a lower beam and an upper beam arranged to move with respect to each other in the longitudinal direction. The cross section of the lower beam is such that there is a groove-like open space at the bottom of the lower beam and a transfer cylinder between the lower beam and the upper beam is mounted in the groove.

Abstract: A rock breaking machine and to a method of lubricating a tool of a rock breaking machine. The lubricating system comprises at least one lubricant channel (23) into which lubricant is fed by a lubricating device (24). Lubricant is supplied to the bearing members (19) of the tool (6, 13) of the rock breaking machine. The lubricating device comprises a lubricant container (25) and a transfer device (26). The transfer device (26) controls the feed of lubricant into the lubricant channel. The lubricant container (25) is integrated into the body (17, 18) of the rock breaking machine.

Abstract: The invention relates to a sound dampening housing for a rock drill which moves along a feed beam in a longitudinal direction thereof, the sound dampening housing being attachable to the feed beam of the rock drill on its both sides so that together with the feed beam the sound dampening housing constitutes a substantially closed space. The sound dampening housing is double-shelled, and an airspace is provided between its inner shell and its outer shell.

Abstract: A method of determining a direction of a drilling pattern in tunnel curve calculation to be executed in a control unit of a rock drilling rig. The invention further relates to a storage device including software product implementing the method, and a rock drilling rig. A tunnel line of a tunnel to be excavated is determined e.g. by using curve fitting. A location of a drilling site on the tunnel line is communicated to the control unit and a navigation plane of the drilling pattern is positioned on the tunnel line. A start point of a round is positioned on the tunnel line and a length of the round is provided. Further, an end point of the round is positioned at a distance corresponding with the length of the round from the start point and a coordinate system of the drilling pattern is directed such that one of its axes points from the start point to the end point. Finally, different coordinate systems are transformed.

Abstract: A method for removing impurities from a control device of a work machine and a control device. The control device (1) comprises a trackball (4), from which impurities are flushed away. Flushing medium and impurities collected below the trackball are led along a discharge channel outside the control device. The entry of impurities into a component space comprising electronics is prevented. The discharge channel has a collecting cup for collecting impurities and leading them by means of a hose to a connecting part that has a conical mating surface for receiving the hose.

Abstract: A method and a software product for positioning a drilling unit in a rock drilling rig, and a rock drilling rig. The drilling unit (5) included in the rock drilling rig (1) is manually displaced towards a starting point (14) of a hole (19) to be drilled next. A control unit (11) in the rock drilling rig (1) performs after the manual displacement (A) an automatic positioning (B) accurately to the starting point in order to initiate drilling.

Abstract: The invention relates to a method for drilling rock, wherein holes to be drilled are determined prior to drilling as a drilling pattern wherein for each hole, a starting place, direction and hole depth for drilling are determined with respect to the rock to be drilled. In the invention, hole-type-specific drilling parameters are determined for the holes to be drilled, and during a drilling phase a drill rig automatically selects drilling parameters for each hole to be drilled on the basis of the hole type of the particular hole.

Abstract: A drill hole measuring device and a rock drilling unit equipped with the measuring device. The measuring device (1) comprises a protective element (3), inside which a sensor (6) can be transferred by means of a transfer device (4).