Abstract: The invention relates to an extraction system for mineral extraction, having a machine frame which is movable along a conveying device and which for each direction of travel, on its front side that, in operation, lies facing a working face, has hewing tools for the minerals to be won, and having a sensor system, disposed on the machine frame, for mineral/host rock recognition. In order to provide an extraction system which can be provided with or used with an improved sensor system, a retaining box for the sensor device is fastened in projecting arrangement to the front side of the machine frame, the retaining box preferably containing a georadar as the sensor system.

Abstract: A shield cap for a shield-type support for underground mining includes a cap plate, with reception devices for the connection of hydraulic cylinder heads to the shield cap, and a supporting structure welded below the cap plate and having a plurality of longitudinal spars. At least two of the longitudinal spars include substantially I-profile struts having an upper profile chord, a lower profile chord and a middle chord running perpendicularly to the two profile chords. The distance between the upper and the lower profile chord decreases at least over a part length of each strut.

Abstract: The invention relates to an extraction system for mineral extraction, having a machine frame which is movable along a conveying device and which for each direction of travel, on its front side that, in operation, lies facing a working face, has hewing tools for the minerals to be won, and having a sensor system, disposed on the machine frame, for mineral/host rock recognition. In order to provide an extraction system which can be provided with or used with an improved sensor system, a retaining box for the sensor device is fastened in projecting arrangement to the front side of the machine frame, the retaining box preferably containing a georadar as the sensor system.

Abstract: A shield cap for a shield-type support for underground mining includes a cap plate, with reception devices for the connection of hydraulic cylinder heads to the shield cap, and a supporting structure welded below the cap plate and having a plurality of longitudinal spars. At least two of the longitudinal spars include substantially I-profile struts having an upper profile chord, a lower profile chord and a middle chord running perpendicularly to the two profile chords. The distance between the upper and the lower profile chord decreases at least over a part length of each strut.

Abstract: A water system for the admission of pressurized water to spray systems arranged on a powered support assembly for underground mining, having at least one spray system for plow or shearer track spraying and having at least one further spray system for goaf space spraying, canopy spraying and side spraying. A central water line feeds spray nozzles of the spray systems. To increase the operating reliability of the water system and thus of the powered support assembly, the control valves for the spray systems are accommodated in a spray valve block which is provided with a connection for the water line and which can be arranged on the powered support assembly as a unit separated from a hydraulic valve block.

Abstract: A housing cover for a solenoid housing operable for accommodating solenoids for switching hydraulic directional valves is disclosed. A housing cover box has a plurality of side walls, a top side, and an open bottom side, with first and second actuating guides for guiding first and second solenoid control push rods being located on the top side. A plug connector is located between the actuating guides. At least one screw clearance hole is located at each corner of the housing cover box for locating a screw for joining the housing cover box to the solenoid housing. A sealing plate is located between the housing cover box and the solenoid housing, and at least one mounting foot is located at a corner and on a bottom surface of the housing cover box. A tubular spigot is aligned with and extends each screw clearance hole.

Abstract: A slide shoe for a mining winning machine is disclosed. The slide shoe includes a slide shoe body attached to the mining winning machine, a sliding area located on the slide shoe body and including a wear thickness, and at least one sensor. The sensor is scannable by wireless signal transmission. A dimension of the wear thickness decreases due to wear during operation, and a sensor signal of the sensor changes when the dimension of the wear thickness of the sliding area decreases below a predetermined minimum thickness.

Abstract: A control device for electrohydrualic support controllers, with an electronic individual controller including a plug board that contains first connecting pieces, a terminal block that is mounted to a corresponding support frame and includes recesses for holding second connecting pieces, plug-in connectors for connecting cables for communicating with adjacent controllers, and at least one external power supply. A connecting plug, to which the lamp can be connected with its connecting cable, is attached to the terminal block.

Abstract: The present invention is an individual controller for shield support frames in underground mining, having a shallow box-shaped housing for holding microelectronics comprising a top wall, a bottom wall, two side walls, a front wall and a back wall, with receptacles for connecting cable plugs from sensors and actuators and with at least one socket for connecting a plug of a cable for communicating with an adjacent individual controller.

Abstract: A sheathed cable for underground mining, comprising a flexible sheath (2) containing armouring (3) and receiving the electric conductors (4), a cable connector (30) being mounted on one end of the sheathed cable and comprising a one-part hollow coupling sleeve (31) which engages over the sheath (2) and receives the end of the sheathed cable in tension-resistant manner in a compression joint and also comprises a plug insert (32) connected to the sleeve (31) by a snap-in connection and receiving contact elements preferably in the form of pins (36) and sockets (37) electrically connected to the conductors (4), wherein a cable feed-through opening (39) in the hollow coupling sleeve (31) is partly filled with sealing compound (38), wherein the coupling sleeve (31) has a continuation (34) which is deformable in order to make the compression joint and exclusively receives the sheathed cable (1), sheath (2), conductors (4) and armouring (3).

Abstract: An electro-hydraulic assembly for use in underground mining is disclosed. The assembly includes a hydraulic component, such as a valve block for an underground self-advancing roof support, as well as actuators and/or sensors which have a housing and can be connected or are connected via a data-transmission system to a control unit. A function (e.g. withdrawing the support, setting, advancing, or the like) can be activated at the hydraulic component by each actuator, and/or a hydraulic state associated with a measuring point of the hydraulic component or another measured variable associated with the self-advancing roof support can be measured by each sensor. A reader unit is associated with each actuator and/or sensor in its respective housing, and an information element or transponder is associated with the hydraulic component for each function, each control valve, or each measuring point.

Abstract: The pressure cell device according to the invention serves for measuring hydraulic pressures in hydraulic mining devices in an inherently secure service region. It is provided with a connection element which can be connected to a pressure reception connection and with a sensor housing, on the inside of which is arranged a hydroelectric pressure transducer which is pressurised by the hydraulic pressure present at the pressure reception connection and converts this into an electrical signal. So as to ensure high measurement accuracy over a long operating period, without it being necessary to have exchanges of the pressure transducer or its new calibration, it is provided according to the invention that the pressure transducer comprises a ceramic pressure measuring cell.

Abstract: The present invention relates to a pilot control valve, especially for use in mining hydraulics. The valve has a valve insert constructed as a valve cartridge, whose single or multipart valve housing has an input entry 17 for pressure fluid P, a connection opening 18 for a load connection A, an output opening 19, opening into the return flow T and an axial boring 21 to accept a valve closing body 20 provided with a closing surface, which can be lifted from a valve sealing seat 31 arranged between the entry opening 17 and the connection opening 18 by means of an electro-magnetic or piezo-electric switching device which can be fastened onto the valve housing. With the lifting movement of the valve closing body 20 from the valve sealing seat 31 is coupled an at least two part closing mechanism for their separation arranged between the connection opening 18 and the output opening 19.

Abstract: An electro-hydraulic assembly for use in underground mining is disclosed. The assembly includes a hydraulic component, such as a valve block for an underground self-advancing roof support, as well as actuators and/or sensors which have a housing and can be connected or are connected via a data-transmission system to a control unit. A function (e.g. withdrawing the support, setting, advancing, or the like) can be activated at the hydraulic component by each actuator, and/or a hydraulic state associated with a measuring point of the hydraulic component or another measured variable associated with the self-advancing roof support can be measured by each sensor. A reader unit is associated with each actuator and/or sensor in its respective housing, and an information element or transponder is associated with the hydraulic component for each function, each control valve, or each measuring point.

Abstract: The pressure cell device according to the invention serves for measuring hydraulic pressures in hydraulic mining devices in an inherently secure service region. It is provided with a connection element which can be connected to a pressure reception connection and with a sensor housing, on the inside of which is arranged a hydroelectric pressure transducer which is pressurised by the hydraulic pressure present at the pressure reception connection and converts this into an electrical signal. So as to ensure high measurement accuracy over a long operating period, without it being necessary to have exchanges of the pressure transducer or its new calibration, it is provided according to the invention that the pressure transducer comprises a ceramic pressure measuring cell.

Abstract: The present invention relates to an electrohydraulic control system (10) for an underground support system, with a valve block (1) which accepts grouped electrically-operated actuators for example electro-magnets (2, 2′) and several control valves of hydraulic valves switched with these electro-magnets and with a circuit board (7) containing an electronic circuit to which all the actuators (2, 2′) of the valve block (1) are connected through a disconnectable plug-in connection. The circuit board (7) is connected via a cable (21) to a controller (20) for data communication in the support system. The invention allows simultaneous connection of all the electro-magnets (2,2′) with the circuit board (7). For this purpose the circuit board (7) is located in a hood-type enclosure part (9) which is attachable to the back (3) of the valve block (1) and when assembled forms a sheet over all the electro-magnets (2,2′).

Abstract: A pilot control valve for mining hydraulics. The valve has an insert constructed as a valve cartridge, whose single or multipart valve housing has an input entry for pressure fluid, a connection opening for a load connection, an output opening, opening into the return flow and an axial boring to accept a valve closing body provided with a closing surface, liftable from a valve sealing seat arranged between the entry opening and the connection opening by an electromagnetic or piezoelectric switching device fastenable onto the valve housing. A singe part valve closing body is provided, having a collar shaped sealing surface and the moving part of the closing mechanism in the form of a shaft section, whereby the shaft section enters into a boring section of the axial boring during the lifting movement, closing a radial opening.