CN102235174A - Improvements in and relating to long wall hydraulic supply systems - Google Patents
Improvements in and relating to long wall hydraulic supply systems Download PDFInfo
- Publication number
- CN102235174A CN102235174A CN2011100929955A CN201110092995A CN102235174A CN 102235174 A CN102235174 A CN 102235174A CN 2011100929955 A CN2011100929955 A CN 2011100929955A CN 201110092995 A CN201110092995 A CN 201110092995A CN 102235174 A CN102235174 A CN 102235174A
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- pumping plant
- pressure
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- pressure sensor
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- 230000006872 improvement Effects 0.000 title description 3
- 239000012530 fluid Substances 0.000 claims abstract description 56
- 238000000034 method Methods 0.000 claims abstract description 32
- 230000004044 response Effects 0.000 claims abstract description 21
- 238000004590 computer program Methods 0.000 claims abstract description 9
- 238000005086 pumping Methods 0.000 claims description 88
- 230000008859 change Effects 0.000 claims description 11
- 238000003860 storage Methods 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 230000006870 function Effects 0.000 description 8
- 230000008569 process Effects 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
- E21D23/26—Hydraulic or pneumatic control
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Fluid-Pressure Circuits (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
A long wall hydraulic supply system and related control unit, method and computer program product are provided. The long wall hydraulic supply system comprises a pump station operatively coupled to remote powered roof supports to supply hydraulic pressure thereto via a hydraulic line. The system also comprises a remote pressure sensor located at a position remote from the pump station, and a control unit. The control unit is operatively coupled to the remote pressure sensor and to the pump station, and is arranged to control the pump station to supply hydraulic fluid to the powered roof support via the hydraulic line in response to a remote pressure signal received from the remote pressure sensor. By using a remote pressure sensor, pump station control can be improved.
Description
Invention field
The method that the present invention relates to the longwell fluid pressure supply system, is used in the control module on the longwell fluid pressure supply system and operates the longwell fluid pressure supply system.
Background of invention
The power roof timbering is that for example electric hydraulic structure of the top board in longwell colliery of mine is supported in the zone that is used on the cutting machine of face place work.When cutting machine was mobile on face, the power roof timbering was required to handle the variation of top board load, and makes himself along with cutting machine advances.The hydraulic drive that top plate supporting and forward operation are provided by long-range hydraulic power unit, long-range hydraulic power unit is positioned at away from the face place, and generally comprises a plurality of pumps.Generally, mine will be made up of the longwell hydraulic system that comprises pumping plant and a large amount of power roof timberings, and each power roof timbering is worked as being independent of other power roof timbering, to carry out load support and the forward operation on face.Pumping plant is arranged to provide hydraulic pressure to all power roof timberings.
The setting pressure of keeping in the hydraulic system is desirable, and therefore pumping plant generally comprises pressure sensor.Pressure sensor at the pumping plant place is used to control pumping plant to be changed and rising pressure in response to the pressure at pumping plant place sensing.Yet, each pump element at the pumping plant place is restricted to fixed pump and send volume operation, and the operation that the control pumping plant provides the expectation supply of fluid volume and therefore requires to maintain the setting pressure at power roof timbering system place according to the operation of its variation is difficult to.
The purpose of illustrative embodiments of the present invention is to handle no matter be here or at least one shortcoming of the prior art assert of other places.
Summary of the invention
In first aspect, the invention provides a kind of longwell fluid pressure supply system, it comprises: pumping plant, it functionally is coupled to remote power roof timbering (remote powered roof support) to provide hydraulic fluid by fluid pressure line to it; The remote pressure sensor, it is positioned at away from the pumping plant place; And control module, wherein control module functionally is coupled to remote pressure sensor and pumping plant, and is arranged to control pumping plant and comes by fluid pressure line hydraulic fluid to be fed to the power roof timbering in response to the remote pressure signal that receives from the remote pressure sensor.
Suitably, the longwell hydraulic system comprises a plurality of power roof timberings.Suitably, the power roof timbering in use is disposed between the inner, main tunnel (main gate end) and the inner, tail tunnel (tail gate end) of face.Suitably, to be positioned to for a power roof timbering be local to the remote pressure sensor.Suitably, to be positioned to for a plurality of power roof timberings be local to the remote pressure sensor.Suitably, the remote pressure sensor is positioned near the inner, tail tunnel of face.Suitably, the remote pressure sensor in central authorities between the inner, tail tunnel of the inner, main tunnel of face and face.Suitably, the remote pressure sensor is positioned near the inner, main tunnel of face.Suitably, the remote pressure sensor is positioned at power roof timbering place.
Suitably, control module comprises the set point pressure input block, and it is arranged to receive and store the setting pressure that the pumping plant expection provides.Suitably, control module is arranged to make pumping plant by controlling the operation of the one or more pumps in the pumping plant, according to the variation of remote pressure signal, the hydraulic fluid of changeable volume is fed to the power roof timbering.Suitably, control module comprises the part of negative feedback loop.Suitably, control module comprises the part of negative feedback loop, its objective is the set point pressure that maintains remote pressure sensor place by the operation of controlling pumping plant in response to the variation of remote pressure signal.
Suitably, control module is arranged to control a plurality of pumping elements in the pumping plant.Suitably, pumping plant comprises one or more positive displacement pumping elements.Suitably, the one or more pumping elements in the pumping plant are driven by speed change driver.Suitably, control module functionally is coupled to speed change driver, in the variation of remote pressure signal the hydraulic fluid of changeable volume is fed to the operation of power roof timbering with control positive displacement pumping element responds.Suitably, control module is arranged to the variation in response to the remote pressure signal, at first makes one or more main pumps send element to be driven, and then one or more other pumping elements additionally is driven.Suitably, main pump send element to be disposed in to comprise in the group of main pump and second level pump.Suitably, main pump send arrangements of elements in the group that comprises main pump, second level pump and third level pump.Suitably, main pump send the pump in the group of element to be driven by speed change driver.Suitably, one or more extra pumping elements are driven by direct on line driver (direct on line drive).
Suitably, control module functionally is coupled to remote pressure sensor and pumping plant by wired or wireless connection.
In second aspect, the invention provides the control module that is used on the longwell fluid pressure supply system, this longwell fluid pressure supply system comprises: pumping plant, it functionally is coupled to the remote power roof timbering to provide hydraulic fluid by fluid pressure line to it; And remote pressure sensor, it is positioned at away from the pumping plant place, this control module in use can be arranged to receive pressure signal from the remote pressure sensor, and the control pumping plant is fed to the power roof timbering in response to the signal that receives from the remote pressure sensor with hydraulic fluid.
Suitably, control module comprises first input block that is arranged to receive set point pressure.Suitably, control module comprises second input block that is arranged to the receiving remote pressure signal.Suitably, control module comprises the subtraction operator of determining the difference between set point pressure and the remote pressure signal.Suitably, control module comprises and is arranged to store the control module that makes the pressure differential information relevant with the feature of pumping plant.Suitably, control module comprises the output interface that is used to be coupled to pumping plant.
Suitably, control module is arranged to as the control module of above-mentioned first aspect and operates.
In the third aspect, the invention provides the method for operation longwell fluid pressure supply system, this longwell fluid pressure supply system comprises: pumping plant, it functionally is coupled to the remote power roof timbering, to provide hydraulic fluid by fluid pressure line to it; The remote pressure sensor, it is positioned at away from the pumping plant place; And control module, this method comprises: receive pressure signal from the remote pressure sensor; And the control pumping plant is fed to the power roof timbering in response to the remote pressure signal that receives from the remote pressure sensor with hydraulic fluid.
Suitably, this method comprises reception and storage set point pressure.Suitably, this method comprises poor between the pressure signal of determining set point pressure and receiving from the remote pressure sensor.Suitably, this method comprises control signal is provided to pumping plant, so that pumping plant will mate with set point pressure from the pressure signal that the remote pressure sensor receives.Suitably, this method comprises feedback.Suitably, this method comprises in response to the variation of the institute's sensing in the requirement of hydraulic fluid is operated one or more main pumps and sent element, and then according to the pressure signal that receives from the remote pressure sensor one or more extra pumping elements of operation in addition.Suitably, this method comprises that using speed change driver to operate one or more main pumps send element.Suitably, this method comprises that using direct on line driver to operate one or more main pumps send element.
In fourth aspect, the invention provides computer program, it is recorded on the machine readable data carrier and comprises the instruction of being arranged, and carries out method according to a third aspect of the invention we in the time of on being installed in suitable computing platform.
According to the present invention, the apparatus and method of in claims, setting forth are provided.According to dependent claims and ensuing description, further feature of the present invention will be tangible.
Description of drawings
In order to understand the present invention better and to illustrate how to realize its embodiment, now as an example with reference to the accompanying drawings, wherein:
Fig. 1 illustrates the schematic diagram of longwell fluid pressure supply system according to an illustrative embodiment of the invention;
Fig. 2 illustrates the schematic diagram of the control module of longwell fluid pressure supply system according to an illustrative embodiment of the invention;
Fig. 3 illustrates explanation and keeps the indicative flowchart of setting pressure with the method for operational power roof timbering system, and this method is according to illustrative embodiments of the present invention; And
Fig. 4 illustrates one group of machine-readable carrier, comprises instruction on it, and each machine-readable carrier in this group is according to illustrative embodiments of the present invention.
The description of illustrative embodiments
To be described in detail with reference to the attached drawings illustrative embodiments of the present invention.With reference now to Fig. 1,, show longwell fluid pressure supply system 100, it comprises: functionally be coupled to one group of remote power roof timbering 20 to pass through the pumping plant 10 of fluid pressure line 30 to its sap pressure supply.The power roof timbering comprises a plurality of power roof timbering elements that start independently that all are coupled to fluid pressure line 30.Pumping plant 10 comprises the driver 14 of pump 12 and primer pump 12.It is in the fluid pressure line 30 of local position that remote pressure sensor 40 is located at power roof timbering 20, and away from pumping plant 10.Control module 50 functionally is coupled to remote pressure sensor 40 and pumping plant 10, and is arranged to control pumping plant 10 and supplies the hydraulic pressure to power roof timbering 20 in response to the remote pressure signal that receives from remote pressure sensor 40 by fluid pressure line 30.In presents, " long-range " means away from pumping plant, and is included in power roof timbering 20 places or near position.
Longwell fluid pressure supply system 100 is with feedback control manipulation, make control module 50 distant stroke pressure signal and set point pressures, and control pumping plant 10 attempts to maintain the set point pressure at power roof timbering 20 places, and no matter power roof timbering 20 pack into and operate in the variation of the caused pressure of variation.The feedback control manipulation of control module 50 is schematically illustrated by the phase method operator 52 shown in the control module 50.Set point pressure determines that according to the load rated value of power roof timbering 20 this load rated value itself depends on the feature of the device that its medium power roof system will be operated.Set point pressure for example is received and stores at the set point pressure input block place of control module 50 in response to user's input.
By this way, control module 50 can make the output of pumping plant 10 accurately match variation to the requirement of the hydraulic fluid volume of power roof timbering 20.Distance sensor 40 is arranged on power roof timbering 20 places makes control module 50 provide improved response on measurement approaches the system of pressure at some place of pumping plant.Do not make the feedback from the pressure sensor to the pumping plant undesired such as following factor: the loss in the long section hydraulic hose between pumping plant and power roof timbering, or for the mismatch between the capacity of the capacity of FLUID TRANSPORTATION hydraulic hose and pumping plant.Operating the pumping plant control module with the unknown that is coupled in conjunction with the hydraulic pressure between pumping plant and the power roof timbering based on the pressure at pumping plant place sensing uniquely with possible variable feature compares, wired or wireless connection between remote pressure sensor and the control module, connection 60 for example shown in Figure 1 may become more firm and accurate.
Flexibility by increasing pumping plant 10 provides other improvement to make response in according to the stage to the variable requirement of hydraulic fluid volume supply.Pump 12 and driver 14 in this illustrative embodiments are set to a plurality of pumpings and driving element.Pumping element is the positive displacement pump that a plurality of driver drives.Control module 50 is arranged in such illustrative embodiments, with a plurality of pumping elements in the control pumping plant 10.In an exemplary embodiment of the present invention embodiment, the one or more pumping elements in the pumping plant are driven by speed change driver.Control module 50 is arranged at first to make main pump to send element for example to be driven so that response is made in the variation according to the requirement of remote pressure signal fast and effectively by speed change driver, then secondly pumping element is driven simultaneously with main pump and except main pump also for example by direct on line driver drives so that basic pumping capacity to be provided.This allows bigger supply changeability, keeps the ability that obtains meticulous control simultaneously.Use this scheme to allow pump repeatedly away from its heap(ed) capacity rated value operation, and no matter the variation that requires.Pumping plant 10 also suitably comprises local pressure sensor (not shown), as the security feature that prevents to make system pressure excessive.
Fig. 2 illustrates the schematic diagram of the control module 50 of longwell fluid pressure supply system according to an illustrative embodiment of the invention.Control module 50 comprises second input block 502 that is arranged to receive first input block 501 of set point pressure and is arranged to the receiving remote pressure signal.Set point pressure and remote pressure signal compare with subtraction operator 52, and the result who subtracts each other is passed to controller 54.Controller 54 stores with driver 14 according to its pump 12 and makes the pressure differential information relevant with the feature of pumping plant 10, and is provided for controlling the output interface 503 of driver 14 operating pumps 12.
Fig. 3 illustrates the indicative flowchart of the method for description operation longwell fluid pressure supply system according to an illustrative embodiment of the invention.At step S101, controller is arranged to receive and the storage set point pressure.Set point pressure can for example touch-screen, control panel etc. be located to be provided at user interface.At step S102, in controller receiving remote pressure sensor information.At step S103, controller is then determined poor between set point pressure and the remote pressure signal, to determine pressure error.Controller then respectively in step S104 and S105 before pumping plant provides control signal, change pressure error into control signal for pumping plant.
The machine readable program instruction that provides on the data medium 200 example data carrier for example shown in Figure 4 can be provided the method for Fig. 3.Carrier 200 comprises machine-readable optical disc, USB (USB) memory stick and special-purpose solid storage device.
Control more accurately and to increase efficiency of pumping station by as above realizing, may improve availability, the service speed that power roof timbering place realizes the response speed that increases again thereby realizes increasing at the hydraulic fluid at power roof timbering place.The service speed of the increase of power roof timbering is the major advantage in the mining processes.
The top description of reference example embodiment and accompanying drawing will readily appreciate that the present invention.Yet the present invention may be embodied in a lot of different forms, and should not be construed as limited to above-mentioned illustrative embodiments.More properly, provide these embodiments,, and notion of the present invention is conveyed to those skilled in the art fully so that the disclosure will be thorough and complete.The present invention limits by the statement of the aspect of the present invention in the superincumbent summary of the invention chapters and sections and with reference to any claims.
Top reference flow sheet, method and computer program product description illustrative embodiments.Should understand, each piece of flow chart, the combination of the piece in the flow chart can be realized by computer program instructions, the processor that these computer program instructions can be provided to all-purpose computer, special-purpose computer or other programmable data treating apparatus to be to produce machine, makes the instruction of carrying out by the processor of computer or other programmable data treating apparatus produce to be used for the means that are implemented in the function that one or more flow path blocks stipulate.
These computer program instructions also can be stored in can instruct computer that computer or other programmable data treating apparatus move in a particular manner can with or computer-readable memory or data medium in, make be stored in computer can with or computer-readable memory or data medium in instruction produce the manufacturing clause that comprises the instruction means that are implemented in the function of stipulating in one or more flow path blocks.
Computer program instructions also can be packed in computer or other programmable data treating apparatus, so that the sequence of operations step is performed in computer or other programmable device, produce computer implemented process, make the instruction of on computer or other programmable device, carrying out be provided for being implemented in the step of the function of stipulating in one or more flow path blocks.
Each piece of flow chart can be represented the part of module, block or the code of the one or more executable instructions that comprise the logic function that is used to realize defined.It shall yet further be noted that in some were optionally realized, the function of mentioning can not occur in order in piece.For example, in fact, two pieces that illustrate continuously can be performed in fact simultaneously, and perhaps described can be performed by opposite order sometimes, depend on related function.
Mean as term used herein " module " or " unit " but be not limited to carry out the software or the hardware component of some task, for example field programmable gate array (FPGA) or special IC (ASIC).Module or unit can advantageously be configured to be present in the addressable storage medium, and are configured to carry out on one or more processors.Therefore, module or unit can be used as example and comprise parts, for example software part, OO software part, base part and task parts, process, function, attribute, program, subroutine, program code segments, driver, firmware, microcode, circuit, data, database, data structure, form, array and variable.The function that provides in parts, unit and module is capable of being combined in less parts, unit and module, or further is separated in extra parts, unit and the module.
Though illustrate and described some preferred implementations, those skilled in the art will appreciate that and to carry out various variations and change, and do not depart from scope of the present invention as defined by the appended claims.
Attention directing is with about this manual of the application simultaneously or all papers and file that submit to before and open to the public inspection of this manual, and the content of all such papers and file here is merged in by reference.
Any combination that can be merged in steps of disclosed all features and/or disclosed so any method or process in this manual (comprising any subsidiary claim, summary and accompanying drawing), the except combinations that such feature and/or at least some of step are repelled mutually.
Disclosed each feature can replace by optional feature identical by being used for, equivalent or similarly purpose in this manual (comprising any subsidiary claim, summary and accompanying drawing), unless stipulate clearly in addition.Therefore, unless stipulate an example of the general series that disclosed each feature only is equivalence or similar characteristics in addition clearly.
The invention is not restricted to the details of aforementioned claim.The present invention expands to any new feature or any new combination of disclosed feature in this manual (comprising any subsidiary claim, summary and accompanying drawing), or any new step of the step of disclosed so any method or process or any new combination.
Claims (15)
1. longwell fluid pressure supply system comprises:
Pumping plant, it functionally is coupled to the remote power roof timbering to provide hydraulic fluid by fluid pressure line to described remote power roof timbering;
The remote pressure sensor, it is positioned at away from described pumping plant place; And
Control module,
Wherein said control module functionally is coupled to described remote pressure sensor and described pumping plant, and is arranged to control described pumping plant in response to the remote pressure signal that receives from described remote pressure sensor and by described fluid pressure line hydraulic fluid is fed to described power roof timbering.
2. longwell hydraulic system as claimed in claim 1, comprise a plurality of power roof timberings, described power roof timbering is disposed between the inner, main tunnel and the inner, tail tunnel of face, and it is local that described remote pressure sensor is positioned to for described power roof timbering.
3. longwell hydraulic system as claimed in claim 1 or 2, wherein said control module comprises the set point pressure input block that is arranged to receive and store the setting pressure that described pumping plant expection provides, described control module is arranged to make the operation of described pumping plant by the one or more pumps in the described pumping plant of control, according to the variation of described remote pressure signal, the hydraulic fluid of changeable volume is fed to one or more described power roof timberings.
4. as claim 1,2 or 3 described longwell hydraulic systems, wherein said control module comprises the part of negative feedback loop, the purpose of the part of described negative feedback loop is by controlling the operation of described pumping plant in response to the variation of described remote pressure signal, maintaining the described set point pressure at described remote pressure sensor place.
5. as the described longwell hydraulic system of arbitrary aforementioned claim, wherein said control module functionally is coupled to speed change driver, with operation, thereby the hydraulic fluid of changeable volume is fed to one or more described power roof timberings in response to the variation of described remote pressure signal control positive displacement pumping element.
6. as the described longwell hydraulic system of arbitrary aforementioned claim, wherein said control module is arranged at first make one or more main pumps send element to be driven in response to the variation of described remote pressure signal, then one or more extra pumping elements is additionally driven.
7. longwell hydraulic system as claimed in claim 6 wherein send the described pump in the group of element to be driven by speed change driver at main pump, and described one or more extra pumping element is by direct on line driver drives.
8. control module that is used on the longwell fluid pressure supply system, described longwell fluid pressure supply system comprises: pumping plant, it functionally is coupled to the remote power roof timbering to provide hydraulic fluid by fluid pressure line to described remote power roof timbering; And remote pressure sensor, it is positioned at away from described pumping plant place, described control module in use can be arranged to receive pressure signal from described remote pressure sensor, and controls described pumping plant in response to the described signal that receives from described remote pressure sensor hydraulic fluid is fed to described power roof timbering.
9. control module as claimed in claim 8, comprise first input block that is arranged to receive set point pressure, second input block that is arranged to the receiving remote pressure signal, and the subtraction operator of determining the pressure differential between described set point pressure and the remote pressure signal.
10. control module as claimed in claim 9 comprises being arranged to store the control module that makes the described pressure differential information relevant with the feature of described pumping plant.
11. a method of operating the longwell fluid pressure supply system, described longwell fluid pressure supply system comprises: pumping plant, and it functionally is coupled to the remote power roof timbering to provide hydraulic fluid by fluid pressure line to described remote power roof timbering; The remote pressure sensor, it is positioned at away from described pumping plant place; And control module, described method comprises: receive pressure signal from described remote pressure sensor; And control described pumping plant in response to the described pressure signal that receives from described remote pressure sensor hydraulic fluid is fed to described power roof timbering.
12. method as claimed in claim 11, comprise: receive and the storage set point pressure, poor between the described pressure signal of determining described set point pressure and receiving from described remote pressure sensor, and control signal is provided to described pumping plant so that described pumping plant will mate with described set point pressure from the described pressure signal that described remote pressure sensor receives.
13. as claim 11 or 12 described methods, comprise: in response to institute's sensing the variation of the requirement of hydraulic fluid is operated one or more main pumps and is sent element, and then according to the described pressure signal that receives from described remote pressure sensor one or more extra pumping elements of operation in addition.
14. method as claimed in claim 13 comprises: use speed change driver to operate one or more main pumps and send element, and comprise and use direct on line driver to operate one or more extra pumping elements.
15. a computer program, this computer program are recorded on the machine readable data carrier and comprise the instruction of being arranged, and carry out according to each the described method in the claim 11 to 14 in the time of on being installed in suitable computing platform.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP10160213A EP2378060B1 (en) | 2010-04-16 | 2010-04-16 | Improvements in and Relating to Long Wall Hydraulic Supply Systems |
| EP10160213.4 | 2010-04-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102235174A true CN102235174A (en) | 2011-11-09 |
| CN102235174B CN102235174B (en) | 2015-11-25 |
Family
ID=42395022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110092995.5A Active CN102235174B (en) | 2010-04-16 | 2011-04-13 | Longwell fluid pressure supply system and relevant improvement thereof |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2378060B1 (en) |
| CN (1) | CN102235174B (en) |
| AU (1) | AU2011201509B2 (en) |
| PL (1) | PL2378060T3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112392545A (en) * | 2014-08-28 | 2021-02-23 | 久益环球地下采矿有限责任公司 | Top support monitoring for longwall systems |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2068467A (en) * | 1980-02-01 | 1981-08-12 | Gewerk Eisenhuette Westfalia | Hydraulic control arrangement |
| GB2329429A (en) * | 1997-09-20 | 1999-03-24 | Joy Mining Machinery Limited | Improvements in and relating to roof supports |
| CN1515800A (en) * | 2002-10-25 | 2004-07-28 | 日本阿尔斯泰克 | Hydraulic circuit and control method for rotary breaker |
| CN2849266Y (en) * | 2005-10-14 | 2006-12-20 | 东莞隆亨机械有限公司 | Control device of oil pressure power |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1251256B (en) * | 1959-10-12 | 1967-10-05 | Coal Industry (Patents) Limited, London | Wandering longwall mining |
| US4319282A (en) * | 1980-02-11 | 1982-03-09 | Exxon Research & Engineering Co. | Facsimile method and apparatus with sheet feeding |
| AU2004295371B2 (en) * | 2003-11-29 | 2009-07-16 | Tiefenbach Control Systems Gmbh | Hydraulic circuit for longwall supports |
-
2010
- 2010-04-16 PL PL10160213T patent/PL2378060T3/en unknown
- 2010-04-16 EP EP10160213A patent/EP2378060B1/en active Active
-
2011
- 2011-04-04 AU AU2011201509A patent/AU2011201509B2/en active Active
- 2011-04-13 CN CN201110092995.5A patent/CN102235174B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2068467A (en) * | 1980-02-01 | 1981-08-12 | Gewerk Eisenhuette Westfalia | Hydraulic control arrangement |
| GB2329429A (en) * | 1997-09-20 | 1999-03-24 | Joy Mining Machinery Limited | Improvements in and relating to roof supports |
| CN1515800A (en) * | 2002-10-25 | 2004-07-28 | 日本阿尔斯泰克 | Hydraulic circuit and control method for rotary breaker |
| CN2849266Y (en) * | 2005-10-14 | 2006-12-20 | 东莞隆亨机械有限公司 | Control device of oil pressure power |
Non-Patent Citations (1)
| Title |
|---|
| 姬迎春等: "综采液压泵站自动化控制系统的研究", 《山西煤炭》, vol. 28, no. 1, 15 March 2008 (2008-03-15), pages 21 - 22 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112392545A (en) * | 2014-08-28 | 2021-02-23 | 久益环球地下采矿有限责任公司 | Top support monitoring for longwall systems |
| CN112392545B (en) * | 2014-08-28 | 2022-06-07 | 久益环球地下采矿有限责任公司 | Top support monitoring for longwall systems |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2378060B1 (en) | 2012-12-05 |
| AU2011201509B2 (en) | 2014-11-13 |
| CN102235174B (en) | 2015-11-25 |
| PL2378060T3 (en) | 2013-05-31 |
| EP2378060A1 (en) | 2011-10-19 |
| AU2011201509A1 (en) | 2011-11-03 |
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