Abstract: A method for semi-continuous casting of a strand of steel in a strand casting machine and a strand casting machine that carries out the method, the method includes pouring liquid steel into a mold while closing off the mold by a bar to form a fully solidified strand start area followed by a partially solidified strand; extracting the partially solidified strand from the mold; supporting and guiding the partially solidified strand in the strand guide; at the end of the casting, ending the pouring of liquid steel into the mold and forming a strand end; extracting the strand end from the mold; ending the extraction of the strand end; ending the secondary cooling; providing controlled or regulated cooling of the partially solidified strand until full solidification of the strand; and discharging the strand from the strand casting machine.

Abstract: A method for semi-continuous casting of a strand (1) of steel in a strand casting machine and a strand casting machine for such casting. The strand has little segregation of the center and porosity. Yet it is castable rapidly. The method steps are: at a casting start of the strand casting machine, pouring liquid steel into an open-ended mold (2). The mold is closed by a cold strand (6). The liquid steel forms, together with the cold strand, a completely solidified strand start (1a) and subsequently forms a semi-solidified strand (1b). Then extracting the semi-solidified strand (1b) from the open-ended mold (2). Supporting and guiding the semi-solidified strand (1b) in a strand guide (3). Cooling the semi-solidified strand (1b) by secondary cooling (4) at the casting end of the strand casting machine, ending the pouring of liquid steel into the open-ended mold (2) and forming a strand end (1c). Extracting the strand end (1c) from the open-ended mold (2).

Abstract: In a heading machine (1, 24) with at least one cutting unit with a rotatably mounted tool holder (10, 39) with disc tools (11, 12, 40, 41), which tool holder is connected in a pivotable manner to the machine frame, the heading machine (1, 24) has a running gear, in particular a crawler track (2), the tool holder (10, 39) is mounted rotatably on an arm (6, 26), which can be pivoted in the vertical direction and the rotational axis (9) of the tool holder (10, 39) runs transversely with respect to the longitudinal axis of the arm (6, 26).

Abstract: In a starter car for a drilling device for mining underground deposits, including a base frame (5) mounted to rotate about a vertical axis (6) and a starter pipe (7) mounted to pivot about a substantially horizontal axis (13) and provided for receiving the drilling device, the starter pipe (7) is arranged to be displaceable relative to the base frame (5) transversely to the horizontal pivot axis (13).

Abstract: In a heading machine (1, 24) with at least one cutting unit with a rotatably mounted tool holder (10, 39) with disc tools (11, 12, 40, 41), which tool holder is connected in a pivotable manner to the machine frame, the heading machine (1, 24) has a running gear, in particular a crawler track (2), the tool holder (10, 39) is mounted rotatably on an arm (6, 26), which can be pivoted in the vertical direction and the rotational axis (9) of the tool holder (10, 39) runs transversely with respect to the longitudinal axis of the arm (6, 26).

Abstract: In a heading machine (1) including a travelling mechanism (2) and a cutting boom (3) or frame, the cutting boom (3) or frame carries at least two rotating cutting heads (5) whose axes of rotation (6) extend in the heading direction or enclose acute angles with the heading direction and which, together, define a cutting profile having a profile width (a), as well as two cutting rollers (8,10) arranged substantially parallel and behind the cutting heads (5) and capable of being positioned on the floor (9) and on the roof (7), respectively. Both cutting rollers (8,10) comprise end portions (25) which are extendible to the width (a) of the profile for the formation of a substantially rectangular cutting profile.

Abstract: In a heading machine (1) including a machine frame equipped with a travelling mechanism (2), a cutting boom (3) carrying cutting tools (5,8,10), and a hauling means (19) extending in the longitudinal direction of the machine beyond the rear end of the machine frame, the cutting tools (5,8,10) are formed by at least two rotating cutting heads (5) having axes of rotation (6) extending in the heading direction or enclosing acute angles with the heading direction, and a unit (21) capable of being trailed behind the machine frame and having a passage cross-section (33) for the hauling means (19) is hingedly connected to the machine frame by the aid of hydraulic piston cylinder units (29,30), which unit comprises at least one anchor boring and setting device (23), and at least one supporting device (24) which is braceable against the roof (7) and the floor (9), each on both sides of the hauling means (19).

Abstract: In a starter car for a drilling device for mining underground deposits, including a base frame (5) mounted to rotate about a vertical axis (6) and a starter pipe (7) mounted to pivot about a substantially horizontal axis (13) and provided for receiving the drilling device, the starter pipe (7) is arranged to be displaceable relative to the base frame (5) transversely to the horizontal pivot axis (13).

Abstract: In a full-cut heading machine including a drill head (1) for hard rock, which is rotationally mounted about an axis of rotation (6) extending in the driving direction, as well as downstream extraction tools (5) for producing a floor widened in the floor region, the downstream extraction tools (5) are arranged on the shells, and optionally end faces, of rollers (3, 4) rotationally mounted transversely to the axis of rotation (6) of the drill head (1).

Abstract: In a method for mining underground deposits using a mining machine, wherein an upper and a lower drift are driven, which extend on both sides of the deposit to be mined, and a preliminary bore is sunk between the two drifts, a supporting device is fixed at the mouth of the preliminary bore in the upper drift. A mining machine supported on the supporting device is positioned at the mouth of the preliminary bore so as to be oriented in the longitudinal direction of the preliminary bore, and the mining machine is advanced from the upper drift to the lower drift corresponding to the course of the preliminary bore.

Abstract: In a cutting machine (2), including rotatably mounted cutting or shearing tools (19), a loading ramp and a hauling means (4) extend in a direction towards a mine face for receiving and hauling cut or sheared material. The cutting or shearing tools (19) are mounted on a slide which is displaceable on guides extending in the longitudinal direction of the machine. The guides are comprised of tubes or rods connected with a machine flame in the region of the track-laying gears (1), preferably within the track-laying gear frame. The slide is comprised of longitudinal spars (10) and a crossbeam (9) for mounting the cutting or shearing tools (19). The machine frame, at least in its front region adjacent the crossbeam (9), is designed as a box section (3), within the clear width of which the hauling means (4) is guided in a manner so as to be displaceable in the longitudinal direction of the machine.

Abstract: In a hewing or cutting roller (1) of variable cutting width, in which two pivotable tool carriers (4, 5) for receiving cutting or hewing tools are arranged on at least one lateral end face (2) of the roller transverse to the axis of the hewing or cutting roller (1), one of the tool carriers carries a locking pin (10) which cooperates with a hook-shaped locking member of the other tool carrier in the extended position of the tool carriers (4, 5).

Abstract: The tunnel drilling machine or tube-driving machine for hard rock drilling has a drill head (19) supporting drilling tools (1 to 18) which has a diameter which is less than the diameter of the bore. The geometric axis of the circle of the envelope of the tools of the full-width drill head (19) is disposed eccentrically in relation to the linear tunnel axis (22) or the axis of rotation (21) or can be displaced.

Abstract: A shield advancing machine, comprising cutting tools (15) rotatably supported on cantilever arms (13, 14) being rotatable around an axis approximately extending in advancing direction and being swivellable in transverse direction to this axis, has a carrier (4) which is guided and supported in axial direction of the shield (1). A rotation drive (22, 33) for a rest (9) of the cantilever arms (13, 14) is provided on the carrier (4), and the cantilever arms (13, 14) as well as their swivel drive (16, 17) are linked to the rest (9).

Abstract: For the purpose of sealing the annular gap between a cutting arm (2) and cutting heads (6) rotatably supported on this cutting arm (2), a main sealing (12) and an additional sealing element (13) is provided. The area of the annular gap (17) is rinsed by water flowing from the gap in outward direction, the water supply conduit (18) opening into the outward area, being designed as a labyrinth, of the gap (7) via a nozzle (17) (FIG. 3).

Abstract: A cutting machine includes an endless conveyor and a loading ramp having movable loading arms which continuously shift the cut material in an upward direction of the loading ramp to conveyor. The rear deflector wheel of the conveyor is driven by a squirrel-cage motor, and the drive of the loading arms is, via the conveyor derived from the front deflector wheel. A slipper clutch is interpositioned within the drive between the motor and the loading arms, and the slide torque of the slipper clutch as reduced to the motor shaft, exceeds the breakdown torque of the squirrel-cage motor.

Abstract: A device for preventing penetration of dust from the outside inwardly into an annular gap between a cutter arm of a cutting machine and a rotatable cutting head carried on said arm, said cutting head having an interior space containing lubricating oil, said device comprising a first seal closing off said interior space and located in said gap, a second seal located in said gap outwardly of said first seal, the grease flow resistance of said second seal in the outward direction being less than the grease flow resistance of said first seal in an inward direction, and a pressurized grease supply line arranged within said cutter arm opening into said gap at a location between said first and second seals whereby during operation of the cutting head grease flows outwardly through said gap and prevents entry of dust into said gap.

Abstract: A cutting machine having a universally movable cutting arm provided with a plurality of cutting heads in which the cutting machine's oil reservoir is mounted within the cutting arm and cooled by the water cooling system for the cutting machine's motor. The cutting heads and the reduction gearing drive therefor employ a common reservoir which is connected to and supplied by the cutting machine's main oil reservoir so that the cutting heads and associated drive gearing are continuously being supplied with cooled oil and are themselves cooled thereby.

Abstract: A device for separating dust particles from an air stream, in particular for mine ventilation, comprising a centrifugal separator, a blower for conveying the air stream through the centrifugal separator, and a device connected in advance of the centrifugal separator in the air flow direction to spray or atomize water which is fed into the air stream entering the centrifugal separator, the centrifugal separator being formed from at least one impeller with substantially radial blades connected together at their outer ends by circumferentially extending walls, the distance of which from the axis increases in the air flow direction, passage apertures being provided to the housing at the positions of greatest diameter.

Abstract: A cutting machine having a universally movable cutting arm and cutting head assembly and a movable loading ramp assembly thereunder and means operatively associated with the cutting arm and loading ramp for controlling the operation thereof so as to prevent contact between the cutting arm and loading ramp by maintaining the vertical spacing therebetween in excess of a predetermined minimum.