Abstract: Arrangement (10) for a rock grouting equipment for positioning at least one cartridge (11) is described. The arrangement incorporates at least one magazine (12), arranged around an axis (15). The magazine (12) incorporates at least one space (13), in which space (13) a plurality of said cartridges (11) is stored. The arrangement further incorporates at least one, radially extending, catching device (3, 14), arranged and formed such that it catches at least one cartridge (11) between itself and the inner surface (4) of the magazine body (12), when it performs a rotating movement around the axis (15). The invention also relates to a method.

Abstract: Method of maneuvering a mobile mining machine including two or more self steered and optionally self propelled interconnected units being connected as train units over a respective articulating joint, said mobile mining machine having a forward and a backward direction, wherein in a tunnel following mode the method includes: producing a set of first signals representative of sideward distances between at least one side of the mobile mining machine and a respective nearby wall of said tunnel, and—evaluating said set of first signals so as to determine a sideways position of the mobile mining machine in respect of the walls of said tunnel during driving, and—producing steering commands to be sent to a propulsion arrangement in order to maintain a position of the mobile mining machine to ensure clearance to tunnel walls during driving. The invention also relates to a system and a mobile mining machine.

Abstract: A device in respect of a hydraulic rock drilling machine (1) with a machine housing (2,3,11), which encloses a hydraulic percussion device, a rotation mechanism (4) for rotation driving a shank adapter (1) and a guiding device (6) for the shank adapter, wherein the rock drilling machine includes at least one supply channel for lubricant to said components intended for lubrication, and at least one outlet channel (5,7) for used lubricant. Said at least one outlet channel (5,7) is connected to a separation chamber (8) for separating particle-shaped impurities existing in used lubricant. The separation chamber (8) has a discharge conduit (9) for treated lubricant. The invention also concerns a method and a rock drilling machine.

Abstract: A hydraulic impact mechanism, of the valveless impact mechanism type, comprising a pre-charged gas accumulator connected to a working chamber in order to make possible impact mechanisms for equipment for rock drilling and hydraulic breakers that is lighter, cheaper and more sustainable from the point of view of material fatigue. Furthermore, a gas accumulator of piston type with an integral brake chamber (240, 250, 360) and a piston (220, 320) designed to fit into the said brake chamber (240, 250, 360).

Abstract: The invention relates to a foldable tailgate for a load bed (2), comprising a link mechanism (28) pivotally connected to the tailgate (1) and the load bed (2), at least one power means (22) connected to the load bed (2) and arranged to fold the tailgate (1) between a raised position in which the tailgate (1) at least partly covers a rear opening (16) of the load bed (2) and a lowered position in which the rear opening (16) of the load bed (2) is open. The tailgate (1) is arranged at the load bed (2) such that the tailgate (1) in a lowered position is located under the load bed (2) and such that the pivotal connection of the link mechanism with the load bed (2) ends up between the tailgate (1) and the load bed (2), and such that, in the lowered position of the tailgate (1), the tailgate (1) is arranged to rest against the underside of the load bed (2). The invention also relates to a load bed (2) with such a foldable tailgate (1) and a vehicle (4) with such a load bed (2).

Abstract: A device (1) for driving tunnels, galleries or the like including a cutting head (2), wherein an excavating direction of the cutting head (2) being essentially at a right angle to said rotation axis (R), a base unit (3) with stabilizing units (S1, S2, S3, S4) for applying and fixing against rock surfaces, a support unit (4) for the cutting head (2), a joint device (5) for pivotal connection of the support unit to the base unit, forcing means (6,7,8,9) arranged between the base unit and the support unit for swinging the cutting head. The joint device (5) is arranged for vertical as well as for horizontal swinging of the support unit (4) in respect of the base unit (3), wherein the support unit (4) is vertically as well as horizontally swingable by means of a pair of upper fluid cylinders (6,7) and a pair of lower fluid cylinders (8,9) comprising said forcing means.

Abstract: The object of this invention is a method for determining ore contents of drill cuttings by irradiating and by detecting fluorescence radiation and scattering radiation. According to the method, drill cuttings being essentially immediately retrieved from the drill hole is arranged as a layer, the upper surface of which is at least partly free from water, a statistically sufficiently representative defined area of the layer is irradiated and the fluorescence of the irradiation is measured for element-characteristic intensities and for Compton-scattering or coherent scattering intensities. The element-characteristic intensities are corrected using coefficients empirically defined from Compton-scattering and/or coherent scattering in order to compensate for the damping due to the coverage effect of water.

Abstract: Herein a bolt (2) comprising an elongated body (4) with a central axis (C) is described. The elongated body (4) is in a first end (6) provided with a first thread (8) and in a second end (10) with a second thread (12). An intermediate part (14) of the elongated body (4) is provided with a collar (16). The collar (16) is provided with at least one first flat surface (18), which first flat surface (18) extends substantially in parallel with the central axis (C). Further, a rock drill comprising housing parts hold together by at least one bolt (2) is described.

Abstract: A tensioning device for a chain transmission for movement transfer between a driver device and a slide to be driven by a drive chain along a linear guide of a rock drill rig. A first fastening member fastens a first end of the drive chain on the slide. A second fastening member fastens a second end of the drive chain on a tensioning head, which is arranged displaceable in a tension direction of the drive chain on the slide. A spring device is arranged between the tensioning head and the slide for spring loading the tensioning head in the tension direction. At least one of the first and second fastening members includes an adjuster for adjusting tension in the drive chain. Also a method, a handling device and a rock drill rig.

Abstract: A percussion device for a hydraulic rock drilling machine (1) including, inside a cylinder (4), a to and fro moveable impact piston (3), which is provided with a land portion (12) for cooperation with a braking recess (11) in the cylinder (4) for the establishment of a braking chamber in advanced positions of the impact piston, wherein a throttle slit (17) is arranged to be established between the land portion (12) and the braking recess (11). A pressure channel (14), being connected to a pressure medium source, is arranged to debouch in the cylinder (4) between the piston guiding device (6) and a position of the land portion (12) in a most advanced position of the impact piston (3). The invention also concerns a method and a hydraulic rock drilling machine.

Abstract: The invention comprises an injection device (6), for injecting fixing material in a drill hole (13) during rock bolting, comprising a hose system (12) and a feed unit (15). The hose system (12) comprises an injection pipe (10), the injection device further comprises a positioning means (33) adapted to adjust the position of the injection pipe (10) in relation to the drill hole (13) and the feed unit (15) comprises means (31, 32) adapted to drive the hose system (12) such that the injection pipe (10) enters the drill hole (13) for supplying fixing material into the hole (13) during operation.

Abstract: A device for a flushing head (3) of a rock drilling machine (1), which includes a machine housing (3) and, inside a cylinder (18), a to and fro moveable percussive piston (17) arranged to exert percussive action against a shank adapter (15), wherein the shank adapter has symmetry axis (19) and a flushing medium channel (22,23) for co-operation with a flushing medium chamber (24) in the flushing head (3) surrounding the shank adapter (15), said flushing head (3) being provided with a connection unit (7) for the connection to a flushing hose (10). The flushing head (3) and the machine housing (2) exhibit co-operating fastening means and fastening elements (6) in line with a force direction of tensile forces (F) being exerted by the flushing medium hose (10) on the connection unit (7) for movability of the flushing head (3) in respect of the machine housing (2) in directions perpendicular to said symmetry axis (19). The device also concerns a rock drilling machine including such a device.

Abstract: A device in a hydraulic rock drilling machine (1) including a distribution valve (7,7?, 7?) arranged in connection with the rock drilling machine for controlling hydraulic flows to different parts of the rock drilling machine, wherein the distribution valve includes a valve body (8, 8?, 8?), which is arranged movable to and fro in axial directions inside a valve chamber (33) and wherein the valve chamber is limited in axial direction by two valve end walls (10,11; 10?,11; 10?,11?). One of the valve end walls is movable in an axial direction against an abutment (12,12?) in such a way that it defines an end position for the valve body, and a pressing device (13,13?,13?) is arranged for pressing said at least one of the valve end walls against said abutment. The invention also relates to a rock drilling machine.

Abstract: A device for applying sprayed concrete to surfaces during tunnel construction and mining. The device includes a radar system including at least one radar sensor that is arranged on a circumference around a spray nozzle. A method for determining at least one parameter that determines the application of sprayed concrete to surfaces during tunnel construction and mining.

Abstract: Boring rig for extraction boring below ground, wherein the boring rig includes: a boring unit (1) having a length direction (L) and two lateral directions (S1,S2), and a boring aggregate (5) being supported by the boring unit (1) said boring aggregate (5) being equipped with rotation and thrusting means for a cutting head (6) and being pivotally adjustable for boring in direction essentially perpendicular to the length direction (L). The boring unit (1) at one end, as seen in said length direction, is connected over a first swing joint (14) to a first drive unit (2), that the boring unit (1) at its second end, as seen in said length direction, is connected over a second swing joint (15) to a second drive unit (3). Each drive unit (2,3) has at least two wheels (8,10) which are arranged individually drivable on a wheel axis, and the position of the boring unit (1) is adjustable by the first swing joint (14) as well as the second swing joint (15) being adjustable. The invention also concerns a method.

Abstract: The present invention relates to a hydraulic percussive arrangement comprising a displaceable arrangement (1) in a casing (11), in which casing (11) the following are arranged at the displaceable arrangement (1): a first chamber (5) connected to a return line (7) for hydraulic oil, a bushing (6) on a first side of the first chamber (5) and separated from the first chamber (5) by a first gap (12) along the displaceable arrangement (1), and a second chamber (2) with a higher pressure of hydraulic oil than that of the first chamber (5) and arranged on a second side of the first chamber (5), separated from the first chamber (5) by a second gap (4) along the displaceable arrangement (1). According to the invention, a third chamber (8) is fixed arranged between the second gap (4) and the first chamber (5) and the third chamber (8) is connected to the first chamber (5) not only by a first passage (14) but also by a third gap (9) along the displaceable arrangement (1).

Abstract: The invention relates to a method pertaining to a bolting configuration (299) where a drilling unit and a bolting unit are arranged to be supported by a bottom carriage (330) via a respective top carriage (271; 272), wherein said bottom carriage (330) is arranged to be supported by a feed beam (230), relative to which said bottom carriage (330) is displaceable, wherein said top carriages (271; 272) are arranged to alternately be supported by said bottom carriage (330) to alternately be brought into operative engagement and hereby alternately be locked relative to said bottom carriage (330).

Abstract: The invention relates to a method pertaining to a drill support device (290) comprising two relatively movable drill support arms (241; 242), wherein a support space is formed between opposite arm sections (261, 262), in which a drill steel (201) is adapted to be guided and wherein said space is opened and closed by relative displacement of said sections (261, 262). The method includes the step of: fixing (S401) at least one of said drill support arms (241; 242) by sealingly clamping between, on one side, a support element (670) and, on the other side, a housing section (650), which accommodates a hydraulic cylinder (605) with a hydraulic piston (680), on which hydraulic cylinder (605), said drill support arm (241; 242) is revolvingly mounted, wherein said drill support arm (241; 242) is clamped by means of a screw means (640) by which the housing section (650) is displaceable.

Abstract: The present invention relates to a drill comprising a shank adapter (3), a damping piston (5) with a forward end surface (18), a stop end surface (14) for the damping piston (5), a rotation chuck bushing (4) with a forward end surface (16), a stop end surface (17) for the rotation chuck bushing, a impact piston (2) with a brake land (10) with a forward end surface (19), and a brake chamber (8) for braking of the impact speed of the impact piston (2) during idle impacts, which brake chamber (8) has a rear edge (21). According to the invention, the actual idle impact stroke length (L1, L2) of the damping piston is greater than the idle impact braking distance (L3) of the impact piston, where the actual idle impact stroke length (L1, L2) of the damping piston is the shorter of the idle impact stroke length (L1) of the damping piston and the idle impact stroke length (L2) of the rotation chuck bushing.

Abstract: Boom uplock arrangement for a loader, said loader comprising a least one movable boom arm (20) and a support means (70), wherein the boom arm (20) is provided with a horizontal, transversal through going hole (21), and a locking pin (42) movably arranged in the hole (21), the locking pin (42) is elongated, and having a first (421) and a second (422) end the locking pin (42) is movable in its longitudinal direction between a passive and an active position; wherein the passive position of the locking pin (42) enables movement of the boom arm (20) past the support means (70), and the active position of the locking pin (42) prevents movement of the boom arm (20) past the support means (70). The invention is characterized in that the locking pin (42) is provided with a protruding maneuver stick (48) arranged in the vicinity of the first end (421) of the locking pin (42), enabling maneuvering of the locking pin (42) between the passive and active positions.