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: A rock drill that comprises a shank (6), the back end of which a percussion piston (10) is arranged to hit. Further, a pulling element (17, 29) is arranged around the shank, to which a pulling force can be directed in such a manner that the shank (6) can by means of said pulling force be moved toward the percussion piston (10), when stuck drilling equipment is freed. During rock drilling, a push force is arranged to act on the pulling element (17, 29), the push force being opposite with respect to the pulling force. The push force is designed in such a manner that during drilling the pulling element (17, 29) moves due to said push force toward the front section of the drill to be at a predefined distance from the position corresponding to the impact point of the shank.

Abstract: Arrangement for replacing a drilling component in a rock drilling apparatus, which arrangement comprises a component magazine for storing replaceable components required in drilling and means for driving the drilling unit to a predefined position and location relative to the component magazine. The arrangement further comprises a changing unit for moving the components between the component magazine and the drilling unit.

Abstract: A method of determining the position of unmanned mining vehicles. According to the method, control marks are provided in the mine, for positioning mining vehicles in production use by means of a marking device, such as a paint sprayer (14), provided in a specific measuring vehicle (3). The invention also relates to a measuring vehicle that is unmanned and comprises a measuring device for measuring a mine and also a marking device for providing a mine gallery with control marks.

Abstract: In a method and arrangement for reducing dust-related problems in rock drilling, air and liquid mist is supplied into a drilling hole to moisten the dust that comes off the drilling hole. The air and moistened dust exiting from the drilling hole are led to a dust separator, dust portions that collect into the dust separator being removed therefrom at suitable intervals. When dust is to be removed from the dust separator's filter, liquid is supplied to the portion below the filter in a mist-like form or as small droplets in connection with the dust removal to moisten the dust which then falls out of the lower end of the dust separator.

Abstract: A breaking apparatus, which comprises a percussion device (1), and in the extension thereof, a tool (3) to which a percussion piston (2) belonging to a percussion device delivers impacts. In the axial direction, the movement of the tool is limited by a stopper element (15) if the movement of the tool exceeds a predetermined range of movement (B) in the direction of the impact (A). The stopper element (15) is a piece made of elastic material, which is arranged in a space between the tool and a supporting surface (16). During the stopping of the tool, the capacity of the space for the stopper element reduces, whereby the element is subjected to pressing. By the effect of the tool movement, the stopper element thus rotates about its cross-sectional central axis (21) and at the same time changes its cross-sectional shape in the reducing space. The invention further relates to a tool used in the above-described breaking apparatus.

Abstract: The invention concerns an arrangement for controlling a hydraulic rock drilling device. The arrangement includes a pressure ratio valve that is used for adjusting the relation between the pressures in the pressure channel leading to the percussion device and/or another actuator, such as a shank stabilizer, and the pressure channel leading to the feed mechanism. The pressure ratio valve is arranged to keep the relation between the pressures of the actuator and the feed mechanism constant over the normal drilling range.

Abstract: A method and a rock drilling apparatus for drilling holes in rock according to a predetermined drilling plan. The method comprises measuring the location of each hole in the rock by inserting a measuring device into the hole, and calculating the deviation of the end of the measured hole from the location determined in the drilling plan. The rock drilling apparatus comprises a measuring device that can be inserted into a drill hole, and means for transferring the measurement values measured by the measuring device to control means of the rock drilling apparatus.

Abstract: A boom arrangement for a rock drilling apparatus includes at least one boom and an actuator, e.g., a passenger cage, arranged at a free end of the boom. The boom also includes at least two boom parts articulated pivotably with respect to each other. The first boom part is articulated by a first articulation pivotable substantially in a horizontal direction. The second boom part in turn is arranged at an end of the first boom part, and the second boom part can be turned both vertically and horizontally with respect to the first boom part.

Abstract: A method and an apparatus for measuring dimensional rough stone blocks. In the method, a dimensional rough stone block is measured in a three-dimensional coordinate system by means of an inertia measuring device by moving the device from one point to another on the surface of the stone block to be measured. The apparatus comprises an inertia measuring device and a calculating device with which it is possible to calculate the dimensions of the stone block based on the coordinate values of the points measured by the inertia measuring device.

Abstract: A method of controlling rock drilling performed by a rock drill provided with a pressure-driven hammer and a rotation motor. In the method, the speed of rotation of the drill rod is defined on the basis of the value of the control signal used to control the control valve that adjusts the flow of the pressure fluid to the rotation motor.

Abstract: The invention relates to a feed apparatus for feeding capsular cartridges into a drilled hole, the apparatus being intended to be used in conjunction with a rock drill apparatus. The feed apparatus comprises a rotatable roll-like cartridge magazine (1) with charge tubes (2) which are arranged on at least one perimeter and into which the capsular cartridges can be loaded in advance. The apparatus further comprises means for indexing a magazine, whereby the desired charge tubes (2) can be rotated to align with the feeding line. In an embodiment of the invention the feed is performed by feeding pressure air into the rear end of the charge tube at a high pressure, whereby the cartridge loaded into the charge tube moves from the charge tube to a connecting pipe (7) positioned at the firing line at the front end of the cartridge magazine and further along a feed hose 86) to a hole drilled in advance. The apparatus can also comprise a control apparatus for automatic control of the feed apparatus from the cabin.

Abstract: The invention relates to an arrangement in connection with a hydraulic breaking apparatus, the arrangement comprising a housing (4) placed around a percussion hammer (1), and a changeable wearing element (6) arranged at the lower part of the housing. The wearing element (6) receives blows and forces directed at the lower part of the housing (4). The wearing element (6) is fastened in such a way that it can be detached and changed easily and rapidly, if required. Further, the structure of the breaking apparatus may also be such that when the wearing element (6) is removed, it is possible to carry out the maintenance and repair operations of the lower frame (1b) of the percussion hammer without disassembling the upper frame (1a) of the percussion hammer.

Abstract: A method of controlling rock drilling wherein the cut length changes from a predetermined cut length, the drilling length is changed by transferring the position of the pattern in the longitudinal direction of the tunnel so that the positions of the end points of the holes remain essentially the same with respect to one another, and a collaring surface is crosswise of the tunnel and different from the actual rock surface.

Abstract: An arrangement in a rock drill comprising a shank and a percussion piston and lifting sleeve for moving the shank towards percussion piston, and a method of controlling rock drilling. The arrangement comprises a lifting sleeve around the shank and a plurality of cylindrical lifting pistons around the shank. In the method, upon downward drilling, the magnitude of the feed force of the rock drill is decreased as the number of extension rods increases, and a force is set to act on some lifting pistons to move the shank towards the percussion point.

Abstract: A method and an arrangement for controlling rock drilling on the basis of a pressure acting in a pressure conduit of a rotation motor of a drill rod. In the method, the pressure acting in the pressure fluid conduit of the rotation motor is measured during the rotation when the drill bit does not touch the rock to be drilled, and the control is carried out thereafter on the basis of the difference between the pressure value measured during the drilling and the idle pressure value. In the arrangement, the rock drilling machine comprises a control unit that measures the pressure acting in the pressure fluid conduit of the rotation motor when the drill rod is rotated so that it does not touch the rock to be drilled and stores it in the memory and controls the rock drilling machine during the drilling on the basis of the difference between the pressure value measured during the drilling and the idle pressure.

Abstract: A method and an arrangement for controlling the feed of a rock drill. In the method, the pressure in a pressure conduit (7a) of a pressure-fluid-operated feed motor (6) is measured, and when the pressure value measured is below the pre-set threshold value, the volume flow of the pressure fluid delivered to the feed motor and thereby the feed rate of the feed motor (6) are adjusted, and when the pressure value measured is above the pre-set threshold value, the feed is adjusted by adjusting the pressure of the pressure fluid delivered to the feed motor (6). In the arrangement, a pressure detector (13) is arranged in the pressure conduit (7a) of the feed motor (6).

Abstract: A mobile drilling apparatus has a front chassis with two wheels, and a rear chassis with two wheels, which are joined together by an intermediate articulation about a vertical axis. To improve the lateral stability when turning, the front chassis is extended backward behind the intermediate axis of articulation and above a portion of the rear chassis. The front chassis thus extends support, in addition to the drilling arm or arms and the driving and work station of some of the electrical and/or hydraulic equipment of the apparatus. In a converse arrangement, the rear chassis is extended forward, in front of the axis of articulation and over a portion of the front chassis.