EP2905423A1 - Vorrichtung und Verfahren zur Richtungsbestimmung für Strebinstallation - Google Patents

Vorrichtung und Verfahren zur Richtungsbestimmung für Strebinstallation Download PDF

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Publication number
EP2905423A1
EP2905423A1 EP14154389.2A EP14154389A EP2905423A1 EP 2905423 A1 EP2905423 A1 EP 2905423A1 EP 14154389 A EP14154389 A EP 14154389A EP 2905423 A1 EP2905423 A1 EP 2905423A1
Authority
EP
European Patent Office
Prior art keywords
course
flight bar
conveyor
measuring
chain conveyor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP14154389.2A
Other languages
English (en)
French (fr)
Inventor
Wolfgang Katrycz
Manfred Ziegler
Manfred BÄUMLER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Caterpillar Global Mining Europe GmbH
Original Assignee
Caterpillar Global Mining Europe GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Caterpillar Global Mining Europe GmbH filed Critical Caterpillar Global Mining Europe GmbH
Priority to EP14154389.2A priority Critical patent/EP2905423A1/de
Priority to CN201580006853.9A priority patent/CN105980659B/zh
Priority to PCT/EP2015/000066 priority patent/WO2015117724A1/en
Priority to AU2015215240A priority patent/AU2015215240B2/en
Publication of EP2905423A1 publication Critical patent/EP2905423A1/de
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
    • E21C35/08—Guiding the machine
    • E21C35/12—Guiding the machine along a conveyor for the cut material
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C27/00—Machines which completely free the mineral from the seam
    • E21C27/02—Machines which completely free the mineral from the seam solely by slitting
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
    • E21C35/08—Guiding the machine

Definitions

  • the present disclosure relates to longwall mining installations in underground mines, and, more particularly, to a device and method for measuring a course of a longwall mining installation extending along a longwall face.
  • a longwall mining installation In longwall mining, a longwall mining installation extends along a longwall face to extract material therefrom, and subsequently advances in a working direction perpendicular to the longwall face. During each advancing step, the components of the longwall mining installation such as a face conveyor and shield supports move towards the longwall face.
  • EP 2 446 207 A2 of Caterpillar Global Mining discloses a method and apparatus for determining the position and/or situation of installation components of a longwall mining installation.
  • a measuring system may include a detection unit with measurement sensor.
  • the detection unit may be movable to and fro between two points of a guiding system along at least one installation component at the longwall face. The movement of the detection unit as disclosed in EP 2 446 207 A2 is decoupled from an extraction machine.
  • position measuring units are discussed in DE 1 246 647 A and GB 2 263 292 A .
  • the present disclosure is directed, at least in part, to improving or overcoming one or more aspects of prior systems.
  • a course measuring flight bar for a chain conveyor of a longwall mining installation may include a first conveyor chain.
  • the course measuring flight bar may comprise a main body, a first chain mount for mounting the course measuring flight bar to the first conveyor chain, and a course measuring device for measuring a position and/or an orientation of the course measuring flight bar.
  • the course measuring device may be integrated in the main body.
  • a chain conveyor for a longwall mining installation may comprise a plurality of flight bars, at least one of which being a course measuring flight bar as exemplary disclosed herein.
  • a longwall mining installation may comprise a chain conveyor as exemplary disclosed herein for arranging along a longwall face for transporting away extracted material.
  • the longwall mining installation may further comprise an extraction machine for extracting material from the longwall face, and a remote control unit.
  • the remote control unit may be configured to receive position and/or orientation measurements from at least one course measuring flight bar of the chain conveyor, and to determine a course of the chain conveyor along the longwall face based on a plurality of received position and/or orientation measurements.
  • the remote control unit may be further configured to output the determined course of the chain conveyor to a display device, to control advancing of the longwall mining installation in a working direction based on the determined course of the chain conveyor, and/or to control the extraction machine based on the determined course of the chain conveyor.
  • a method for measuring a course of a chain conveyor along a longwall face is disclosed.
  • the chain conveyor may comprise at least one flight bar as exemplary disclosed herein.
  • the method may comprise operating the chain conveyor, and during operating the chain conveyor, measuring at least one position and orientation of the at least one flight bar by the course measuring device.
  • a measuring device may be integrated in a flight bar of a chain conveyor to form a course measuring flight bar.
  • the course measuring flight bar is - similar to conventional flight bars - fastened to at least one conveyor chain of the chain conveyor.
  • the course measuring flight bar revolves with the conveyor chain(s) in an upper strand and a lower strand of the chain conveyor, and, thereby, measures a course of the chain conveyor along the longwall face.
  • a combination of a plurality of measurements acquired by the measuring flight bar during travel in the upper strand and lower strand of the chain conveyor, respectively, may be combined to determine the course of the chain conveyor along the longwall face.
  • course relates to a plurality of spacial positions and spacial orientations (also referred to as poses) representing a spacial route (path) along which a respective component such as a conveyor extends.
  • a longwall mining installation utilizing a measuring flight bar is described in connection with Fig. 1 .
  • a conventional flight bar is described with reference to Fig. 2
  • two embodiments of a course measuring flight bar are described with reference to Figs. 3 and 4 .
  • Fig. 5 Under specific reference to Fig. 5 , an exemplary course measuring device is explained.
  • Longwall mining installation 1 extends along a longwall face 2, and comprises a plurality of installation components such as an extraction machine 4, shield supports 6, and a face conveyor 8.
  • extraction machine 4 cuts along longwall face 2 in a reciprocating manner to extract material 10, for example, coal.
  • extraction machine 4 may be a shearer, a mining plow or a hard rock cutter.
  • shield supports 6 are arranged in series along the longwall face 2. Surrounding rock can only break in and form the so-called old workings after advancing of shield supports 6.
  • Moving devices 12 are connected between shield supports 6 and face conveyor 8.
  • Said moving devices 12 may comprise a pushing or walking bar, which is hydraulically loadable in two directions.
  • a respective face conveyor segment 9 of face conveyor 8 is pushed forward in a work direction (indicated by an arrow A in Fig. 1 ). If loaded in the other one of the two possible directions, moving device 12 pulls up individual shield supports 6 in work direction (arrow A).
  • Material mined by extraction machine 4 drops onto face conveyor 8, which transports the extracted pieces of rock and minerals to a main roadway 14 (also referred to as drift). There, the extracted pieces are passed to a pass-over conveyor or roadway conveyor 16. The transported pieces may be crushed and further transported via, for example, a belt conveyor.
  • face conveyor 8 extends along longwall face 2 and builds up of a plurality of face conveyor segments 9. Said face conveyor segments 9 are connected in series so as to resist separation when a tensile force is applied, and to restrict relative angular movement.
  • Face conveyor 8 is formed as a so-called chain conveyor including two conveyor chains 17, which are redirected by sprockets 15 accommodated in respective stations at each end of face conveyor 8. Specifically, conveyor chains 17 are guided in a first direction in an upper strand of face conveyor 8 when transporting material to roadway conveyor 16, and are guided in a second direction, which is oppositely directed to the first direction, in a lower strand of face conveyor 8 during return travel.
  • a main drive 18 is arranged in main roadway 14, and an auxiliary drive 20 may be arranged in an auxiliary roadway 22.
  • a plurality of flight bars (scrapers) 23, 24 are fastened at conveyor chains 17 at preset distances.
  • at least one flight bar is considered as course measuring flight bar 24, one of which is exemplary shown in Fig. 1 .
  • the remaining flight bars are considered as conventional flight bars 23.
  • Course measuring flight bar 24 differs from conventional flight bar 23 at least in that course measuring flight bar 24 is equipped with a course measuring device 52.
  • Course measuring device 52 is configured to transmit position and orientation information of course measuring flight bar 24 to a control unit 68 as is described in greater detail herein later on.
  • the information may be in the form of raw measuring data, and/or may be at least partially preprocessed.
  • Conventional flight bar 23 is mountable to two conveyor chains 17 only one of which is exemplary shown in Fig. 2 in a simplified manner by way of three chain links 28, 30, 32 for the purpose of clarity.
  • Conventional flight bar 23 comprises a main body 34.
  • Said main body 34 includes a top web 36, a first and second flight bar wing 38 and 40 at each end, and a clamp 42.
  • Flight bar wings 38, 40 may be integrally formed with top web 36.
  • Clamp 42 is mounted below an underside of top web 36, for example, by means of a screw mechanism.
  • the screw mechanism consists of threaded shanks 44 and fastening nuts 46.
  • threaded shanks 44 are inserted into aligned throughholes in clamp 42 and top web 36, respectively.
  • Fastening nuts 46 are screwed onto threaded shanks 44 to rigidly connect clamp 42 to top web 36.
  • both clamp 42 and top web 36 form two chain mounts 48 between one another for mounting conventional flight bar 23 to two conveyor chains 17, only one of which is shown in Fig. 2 .
  • course measuring flight bar 24 is shown. Similar to conventional flight bar 23 of Fig. 2 , course measuring flight bar 24 of Fig. 3 includes main body 34 with top web 36, first and second flight bar wing 38 and 40 at each end, and clamp 42. Likewise, clamp 42 is mounted to top web 36 via threaded shanks 44 and fastening nuts 46.
  • course measuring flight bar 24 of Fig. 3 differs from conventional flight bar 23 of Fig. 2 in that course measuring flight bar 24 is provided with course measuring device 52.
  • Course measuring device 52 is integrated in main body 34 of course measuring flight bar 24.
  • course measuring device 52 may be integrated in, for example, top web 36, first flight bar wing 38, second flight bar wing 40, clamp 42, or threaded shank 44.
  • course measuring device 52 may be provided in a cartridge 53, which is insertable into a cartridge cradle 50 in course measuring flight bar 24.
  • Cartridge 53 is exemplary depicted in Fig. 3 in a separate view next to course measuring flight bar 24 in a not inserted state.
  • cartridge 53 may be securable in cartridge cradle 50 by means of a screw mechanism, and/or a snap-fit mechanism.
  • cartridge 53 may have an outer shape of a cylinder, a polyhedron, or combinations thereof.
  • cartridge cradle 50 may be designed with inner faces at least partially matching with the outer shape of respective cartridge 53.
  • cartridge cradle 50 for housing cartridge 53 is disposed in second flight bar wing 40.
  • cartridge cradle 50 may be arranged at any other conceivable location of main body 34 such as top web 36, first flight bar wing 38, second flight bar wing 40, and/or clamp 42.
  • cartridge 53 and threaded shank 44 may be integrally formed with one another such that aligned throughholes in top web 36 and clamp 42 form a cartridge cradle.
  • a further embodiment of a course measuring flight bar is referred to with reference numeral 54.
  • Course measuring flight bar 54 of Fig. 4 differs from course measuring flight bar 24 of Fig. 3 in that course measuring flight bar 54 is shorter and provided with one chain mount 48' only.
  • course measuring flight bar 54 may be fastened to the sole conveyor chain of a single chain conveyor (not shown), or to one of conveyor chains 17 of (double) chain conveyor 8 shown in Fig. 1 .
  • course measuring device 52' is integrated in main body 34' of course measuring flight bar 54'. Specifically, course measuring device 52' is provided in cartridge 53', which in turn is inserted in cartridge cradle 50'. Said cartridge cradle 50' at least partially extends through top web 36' of main body 34'. As explained, course measuring device 52' may be not necessarily provided in cartridge 53', but may be directly integrated in main body 34', similar to measuring flight bar 24 of Fig. 3 described herein.
  • course measuring device 52 is depicted. Said course measuring device 52 forms part of a course measuring system 60 further including a remote control unit 68.
  • Course measuring device 52 includes a measuring unit 62, a data storage 64, a microprocessor 65, a transmitter 66, and an electric power supply 70.
  • Course measuring unit 62 is configured to measure and output any kind of information facilitating position and/or orientation determination of course measuring unit 62, and, thus, of course measuring flight bar 24 or 54.
  • course measuring unit 62 is embodied as inertial measurement unit (often referred to as IMU in literature).
  • the IMU has three accelerometers 72 and three gyroscopes 74.
  • the three accelerometers 72 and three gyroscopes 74 are configured and arranged to measure three accelerations and three angular velocities along three linearly independent axes, respectively.
  • a sensor integrated in position measuring unit 62 may be capable to measure the gravitational direction for providing a reference direction in relation to the direction of the three accelerations and three angular velocities.
  • course measuring unit 62 may include more or less accelerometers, and/or gyroscopes, and/or may include at least one sensor with a different measuring principle, which facilitates position and/or orientation measurements.
  • Measured data from course measuring unit 62 is at least temporarily stored in data storage 64.
  • data storage 64 may include any type of temporally, and/or permanent memory known in the art.
  • Microprocessor 65 is configured and linked to process any kind of data and to perform any kind of command and operation, which are required for operating course measuring unit 62, data storage 64, transmitter 66, and/or electric power supply 70 as desired.
  • Transmitter 66 is capable of transmitting stored data from data storage 64 to remote control unit 68.
  • a wireless or wired connection 78 connects data storage 64 and transmitter 66 to transmit data between both.
  • transmitter 66 may be able to directly transmit measured data from measuring unit 62 to remote control unit 68 without using an intermediate storage such as data storage 64.
  • transmitter 66 may be integrated with a receiver (not shown in further detail in Fig. 5 ) to form a so-called transceiver for facilitating bi-directional communication between the transceiver and remote control unit 68.
  • signals sent from remote control unit 68 may indicate that position measurements are required, electric power supply 70 shall switch-off, or data sent by transmitter 66 was not accurately received by control unit 68.
  • Electric power supply 70 is provided to energize course measuring unit 62, data storage 64, microprocessor 65, and transmitter 66.
  • Electric power supply 70 may be replaceably provided in cartridge 53, or in flight bar 24 or 54 (see Figs. 3 and 4 ).
  • electric power supply 70 may be rechargeable, for example, by means of a vibration powered generator mounted in flight bar 24 or 54, and/or via wireless power transmission.
  • electric power supply 70 may be a (non-) rechargeable battery.
  • course measuring device 52 may further include a dampening device 82 as schematically indicated by a dashed rectangular in Fig. 5 .
  • Dampening device 82 may dampen shocks and vibrations, which may damage any component of course measuring device 52, and/or may degrade the quality of the measurements taken.
  • Dampening device 82 may feature any type of active or passive dampening mechanism known in the art.
  • dampening device 82 may be a rubber or a cushion provided about a specific, some, or each component of course measuring device 52 to dampen vibrations and shocks.
  • Course measuring device 52 or one, or more components thereof may be included in cartridge 53 described in particular in connection with Fig. 3 .
  • remote control unit 68 To receive data via a communication link 80 from transmitter 66, remote control unit 68 is equipped with a receiver. In embodiments with bi-directional communication as explained, remote control unit 68 may further include a transmitter.
  • communication link 80 may be a wireless communication link.
  • Remote control unit 68 may be positioned at any suitable location of the longwall mining installation 1 shown in Fig. 1 .
  • remote control unit 68 may be arranged next to one of drives 18 and 20 in roadway 14 and 22, respectively.
  • remote control unit 68 may be integrated with and/or coupled to a central control unit (not shown in further detail), which may be configured to control the components of longwall mining installation 1 at least in part.
  • the course measuring device as generally disclosed herein is applicable in mining installations.
  • the course measuring device is applicable in longwall mining installations extending along a longwall face for the purpose of extracting material therefrom.
  • the longwall mining installation includes a chain conveyor for transporting the extracted material to a roadway.
  • face conveyor 8 transports material extracted by extraction machine 4 to a pass-over station for passing the material to roadway conveyor 16.
  • face conveyor 8 is embodied as double chain conveyor, two conveyor chains 17 revolve in the upper and lower strand of the same. Fastened to the conveyor chain(s) 17, a plurality of flight bars 23, 24 is provided, at least one of which being a course measuring flight bar 24.
  • Course measuring flight bar(s) 24, and, thus, course measuring device(s) 52 travel with conveyor chain 17 and further conventional flights bars 23 of face conveyor 8 during operation.
  • course measuring flight bar 24 moves in the upper strand of face conveyor 8 in a first direction, which is the material transport direction, and moves in the lower strand of face conveyor 8 in a second direction opposite to the first direction. This allows to continuously determine a three-dimensional position and/or orientation of face conveyor segments 9 connected in series to form face conveyor 8 and passed by course measuring flight bar(s) 24 or 54.
  • sensors 72, 74 of course measuring unit 62 continuously measure accelerations and angular velocities, for example, at a rate of 1 kHz or higher. Transmittal of measured data may be performed in a continuous manner, in which as soon as new measurements are taken, the same are transmitted to remote control unit 68 via communication link 80. Alternatively or additionally, measured data may be provided in packages, which may include preprocessed data to reduce package size, at preset timings, and/or upon request from remote control unit 68 or when passing by remote control unit 68.
  • a position and an orientation of flight bar 24 at the time the measurements were taken are determined, for example, by remote control unit 68, or a specific control unit for processing the position and orientation data.
  • a course of face conveyor 8 along longwall face 2 is determined.
  • the resolution and accuracy of the determined course of face conveyor 8 along longwall face 2 depends on the number of included measurements. For example, higher measuring and transmitting frequencies, and/or providing more than one course measuring flight bar 24 or 54 with measuring unit 62 may result in a higher resolution and accuracy of the determined course of face conveyor 8.
  • course measuring unit 62 may include redundant accelerometers and gyroscopes, and/or several flight bars 24 may be coupled to the conveyor chain(s) 17 of face conveyor 8.
  • the determined course of face conveyor 8, and, thus, longwall mining installation 1 may be visualized via a display to an operator, and/or may be used to control longwall mining installation 1. For example, advancing of longwall mining installation 1 may be controlled based on the determined course of face conveyor 8. In particular, the actual course of face conveyor 8 along longwall face 2 may be adjusted based on the determined course to form a straight line along longwall face 2. Additionally or alternatively, extraction machine 4 may be controlled based on the determined course of face conveyor 8.
  • the system for measuring positions and orientations of conveyor segments 9 as disclosed herein may allow a robust determination of the course of face conveyor 8 along longwall face 2 for a couple of reasons.
  • the degrees of freedom of the movement of course measuring flight bar 24, and, thus, of course measuring device 52 is limited due to the fixation at conveyor chain(s) 17. Being aware of this, it is clear that the velocity direction of flight bar 24 in a body fixed coordinate system of course measuring flight bar 24 is constant over averaged time. Further, due to the fixation of course measuring flight bar 24 to conveyor chain 17, orientation changes of course measuring flight bar 24, and, thus, course measuring device 52 are limited.
  • a first position and orientation of flight bar 24 during travel in an upper strand of a first conveyor segment 9 of face conveyor 8 may be measured.
  • a second position and orientation of course measuring flight bar 24 during travel in a lower strand of the first conveyor segment 9 of face conveyor 8 may be measured.
  • the first position and orientation may be averaged with the second position and orientation.
  • course measuring flight bars 24 by increasing a number of course measuring flight bars 24, and, thus, course measuring devices 52, the number of available measurements for determining the course of face conveyor 8 may be increased. For example, 5, 10, 15 or even more course measuring flight bars 24 may be connected to conveyor chain(s) 17 of face conveyor 8. The number of course measuring flight bars 24 may also depend on the length of face conveyor 8, wherein as a general rule longer face conveyors 8 may be provided with a higher number of measuring flight bars 24.
  • a roadway conveyor for example roadway conveyor 16 shown in Fig. 1
  • a roadway conveyor 16 shown in Fig. 1 may comprise a plurality of flight bars at least one of which being a measuring flight bar as exemplary disclosed herein.
  • data acquisition and/or data processing based on measurements from measuring unit 62 may be conducted in accordance with the method disclosed in EP 2 446 207 A2 , which is hereby entirely incorporated herein by reference as being an actual part of the present disclosure.
  • a device for measuring a course of a longwall mining installation along a longwall face may comprise a course measuring device accommodated in a housing.
  • the housing may include a chain mount connectable to an extraction machine drive chain, for example, of a mining plow.
  • At least one device travels with the extraction machine drive chain in an upper and/or lower strand of a respective drive chain guidance.
  • the course of the longwall mining installation can be determined in accordance with the method described herein in connection with measurements taken by course measuring device 52 in flight bar 24 or 54.
  • course measuring device may be embodied similar to course measuring device 52.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Control Of Conveyors (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
EP14154389.2A 2014-02-07 2014-02-07 Vorrichtung und Verfahren zur Richtungsbestimmung für Strebinstallation Withdrawn EP2905423A1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP14154389.2A EP2905423A1 (de) 2014-02-07 2014-02-07 Vorrichtung und Verfahren zur Richtungsbestimmung für Strebinstallation
CN201580006853.9A CN105980659B (zh) 2014-02-07 2015-01-15 用于长壁设施路线确定的装置和方法
PCT/EP2015/000066 WO2015117724A1 (en) 2014-02-07 2015-01-15 Device and method for longwall installation course determination
AU2015215240A AU2015215240B2 (en) 2014-02-07 2015-01-15 Device and method for longwall installation course determination

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14154389.2A EP2905423A1 (de) 2014-02-07 2014-02-07 Vorrichtung und Verfahren zur Richtungsbestimmung für Strebinstallation

Publications (1)

Publication Number Publication Date
EP2905423A1 true EP2905423A1 (de) 2015-08-12

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EP14154389.2A Withdrawn EP2905423A1 (de) 2014-02-07 2014-02-07 Vorrichtung und Verfahren zur Richtungsbestimmung für Strebinstallation

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EP (1) EP2905423A1 (de)
CN (1) CN105980659B (de)
AU (1) AU2015215240B2 (de)
WO (1) WO2015117724A1 (de)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1246647B (de) 1965-12-22 1967-08-10 Bergwerksverband Gmbh Verfahren zum Ausrichten eines Strebbetriebes
GB2263292A (en) 1992-01-16 1993-07-21 Meco Electronics Ltd Profile measurement and control of a mine face
US5624162A (en) * 1994-10-07 1997-04-29 Bochumer Eisenhutte Heintzmann Gmbh & Co Kg Long-wall mining machine with a working chain
EP1464919A1 (de) * 2003-04-05 2004-10-06 Renold Plc Verfahren und Vorrichtung zum überwachen des Verschleisses von Kettengliedern
US20070056379A1 (en) * 2005-09-09 2007-03-15 Sayed Nassar Conveyor diagnostic system having local positioning system
US20110093218A1 (en) * 2009-10-20 2011-04-21 Tibor Vozner Conveyor chain monitoring system and method
EP2446207A2 (de) 2009-06-23 2012-05-02 Bucyrus Europe GmbH Verfahren zur bestimmung der position von installationsbestandteilen von bergbauanlagen
US20130015043A1 (en) * 2010-04-26 2013-01-17 John Tout Chain tension sensor

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8602502B2 (en) * 2011-12-19 2013-12-10 Joy Mm Delaware, Inc. Articulated shearer

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1246647B (de) 1965-12-22 1967-08-10 Bergwerksverband Gmbh Verfahren zum Ausrichten eines Strebbetriebes
GB2263292A (en) 1992-01-16 1993-07-21 Meco Electronics Ltd Profile measurement and control of a mine face
US5624162A (en) * 1994-10-07 1997-04-29 Bochumer Eisenhutte Heintzmann Gmbh & Co Kg Long-wall mining machine with a working chain
EP1464919A1 (de) * 2003-04-05 2004-10-06 Renold Plc Verfahren und Vorrichtung zum überwachen des Verschleisses von Kettengliedern
US20070056379A1 (en) * 2005-09-09 2007-03-15 Sayed Nassar Conveyor diagnostic system having local positioning system
EP2446207A2 (de) 2009-06-23 2012-05-02 Bucyrus Europe GmbH Verfahren zur bestimmung der position von installationsbestandteilen von bergbauanlagen
US20110093218A1 (en) * 2009-10-20 2011-04-21 Tibor Vozner Conveyor chain monitoring system and method
US20130015043A1 (en) * 2010-04-26 2013-01-17 John Tout Chain tension sensor

Also Published As

Publication number Publication date
CN105980659B (zh) 2019-03-26
WO2015117724A1 (en) 2015-08-13
AU2015215240A1 (en) 2016-09-01
AU2015215240B2 (en) 2018-09-27
WO2015117724A8 (en) 2016-02-25
CN105980659A (zh) 2016-09-28

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