AU2010213198A1 - Method for controlling the cutting depth of shearers - Google Patents
Method for controlling the cutting depth of shearers Download PDFInfo
- Publication number
- AU2010213198A1 AU2010213198A1 AU2010213198A AU2010213198A AU2010213198A1 AU 2010213198 A1 AU2010213198 A1 AU 2010213198A1 AU 2010213198 A AU2010213198 A AU 2010213198A AU 2010213198 A AU2010213198 A AU 2010213198A AU 2010213198 A1 AU2010213198 A1 AU 2010213198A1
- Authority
- AU
- Australia
- Prior art keywords
- cutting
- drums
- cutting depth
- drum
- measured values
- 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.)
- Granted
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21C35/24—Remote control specially adapted for machines for slitting or completely freeing the mineral
Abstract
The invention relates to a method for controlling the cutting depth of the drums of shearers used as recovery equipment in underground coal mining, according to which method the cut of the drums into the country wall is detected by means of measured values and the cutting depth of the drums is adjusted by control signals derived from the measured values. The invention is characterised in that during the recovery operation, the current consumption (I) of the cutting motors that drive the drums and the travelling speed of the shearer (V) are detected as measured values and the respective specific cutting energy (E) is measured in a computer as the ratio of the current consumption (I) to the travelling speed (V). A respective characteristic value for the specific cutting energy (E) is determined for different mining conditions in accordance with the resistance of the coal to be recovered and the outcrop of the country wall. Once this value has been exceeded, a cut is made by the drum in the country wall and corresponding control signals for correcting the cutting depth of the drum are generated.
Description
Method for Controlling the Cutting Depth of Shears D e s c r i p t i o n [0001] The present invention relates to a method for controlling the cutting depth of the drums of shearers, also known as disc shearer loaders, used as recovery equipment in underground coal mining, according to which the cut of the drums into the country wall or rock is detected by means of measured values and the cutting depth of the drums is adjusted by control signals derived from the measured values. [0002] Such a method is known from DE 31 27 702 Al. Here, the solid borne noise that is induced by the cutting forces brought about at the respective drum by the materia! being engaged is measured by a solid borne noise detector mounted on the supporting arm of the drum. The oscillation amplitudes of the solid-borne noise are evaluated and -2 are compared, for adjustment purposes, with the frequency spectra characteristic on the one hand for the cutting of coal, and on the other hand for the cutting of country rock. From this comparison, control signals are generated for adjusting the cutting depth of the drums. Unfortunately, a drawback of this method is that it does not operate with the necessary precision, since the transmission of the solid-borne noise data via the supporting arms of the drums is subject to further influences, such as bearing rigidity, vibrations that occur, and the like. [0003] It is therefore an object of the present invention to provide a method of the aforementioned general type that operates with an improved precision, [0004] The realization of this object, including advantageous embodiments and further developments of the invention, results from the content of the patent claims, which follow this description. [0005] The basic concept of the invention is that during the recovery or shearing operation, the current consumption (ISM) of the cutting motors, which drive the drums, and the traveling speed of the shearer (VM), are detected as measured values, from which the respective specific cutting energy (Esp) is determined or measured in a computer as the ratio of the current consumption (IsM) to the traveling speed -3 (VM), whereby a respective characteristic value for the specific cutting energy (Esp) is determined for different mining conditions in accordance with the resistance or compactness of the coal that is to be recovered and of an outcrop of the country wall or rock, whereupon when this value is exceeded, a cut of the drum Into the country wall or rock is assumed, and corresponding control signals are generated for correcting the cutting depth of the drum. [0006] In this connection, the invention utilizes the expended specific cutting energy (Esp) of shearers as the criterium for recognizing differences in the minerals cut by the drums that are characterized by different hardnesses. The specific cutting energy (Esp) results from the following mathematical interrelationship: Esp= PsM x q / VM x Dw x T, where PSM = Cutting motor power = output VM = Speed of the Machine Dw = Drum Diameter Tw = Drum Cutting Depth -4 [0007] Since the values for Dw, Tw and r can be applicable as constant values, and the power PsM of the pertaining cutting motor can be assumed to be proportional to the cutting motor current, it can thus be applicable that the specific cutting energy (Esp) corresponds to the ratio of cutting motor current (Ism) to the traveling speed (VM) of the shearer. [0008] The specific cutting energy differs depending upon whether the drum cuts in the coal or in the country rock. As a function of specific deposit or seam conditions, characteristic values can be set for the specific cutting energy for different coal layers, as well as for country rock of differing formation, and hence for individual mining operations. To this extent, the characteristic values are set as parameters in the computer. [0009] As the recovery operation continues to run, the respective specific cutting energy that is to be expended is determined in the computer, and is compared for adjustment purposes with the characteristic values that are stored in the computer. In this way, it is possible to determine whether the drum is cutting in the coal or in the country rock, and also whether portions of the country rock are being cut along. From this comparison, corresponding control signals can be generated for correcting the cutting depth of the drum, and in conformity therewith the cutting depth of the drum can be corrected.
-5 [0010] In this regard, the present invention has the advantage that an automatic recognition of the boundary layer between coal and country rock, or an automatic tracking of the boundary layer during the cutting operation, can be achieved, and in particular not only for the leading drum in its contact with the roof of the seam, but also for the trailing drum in its contact with the footwall. [0011] In particular in order to avoid imprecise measurements during the start-up of the shearer, it is provided pursuant to one exemplary embodiment of the invention that the calculation of the specific cutting energy (Esp) in the computer be carried out only above a traveling speed (VM) that is established as a lower limit, which, for example, can be assumed at 3 dm/min. [0012] The features of the subject matter of these documents disclosed in the preceding description, the patent claims and the abstract, can be important individually as well as in any desired combination with one another for realizing the various embodiments of the invention.
Claims (2)
- 2. Method according to claim 1, characterized in that for avoiding measurement impr6cisions, the calculation of the specific cutting energy (Esp) in the computer is carried out only above a traveling speed (VM) established as a lower limit. -7
- 3. Method according to claim 2, characterized in that the traveling speed established as a lower limit is 3 dm/min.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009009000.2 | 2009-02-14 | ||
DE102009009000A DE102009009000B4 (en) | 2009-02-14 | 2009-02-14 | Method for regulating the cutting height of roller skid loaders |
PCT/EP2010/000644 WO2010091814A2 (en) | 2009-02-14 | 2010-02-03 | Method for controlling the cutting depth of shearers |
Publications (2)
Publication Number | Publication Date |
---|---|
AU2010213198A1 true AU2010213198A1 (en) | 2011-08-25 |
AU2010213198B2 AU2010213198B2 (en) | 2013-11-28 |
Family
ID=42356548
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU2010213198A Expired - Fee Related AU2010213198B2 (en) | 2009-02-14 | 2010-02-03 | Method for controlling the cutting depth of shearers |
Country Status (6)
Country | Link |
---|---|
US (1) | US20120038202A1 (en) |
CN (1) | CN102369340A (en) |
AU (1) | AU2010213198B2 (en) |
DE (1) | DE102009009000B4 (en) |
RU (1) | RU2490452C2 (en) |
WO (1) | WO2010091814A2 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102720496B (en) * | 2012-06-27 | 2014-12-31 | 江苏师范大学 | Method and system for automatically identifying coal rock interface of coal cutter, and automatically heightening roller |
CN102797463B (en) * | 2012-08-31 | 2014-10-29 | 中国矿业大学 | Method for determining automatic coal cutting trajectory of coal cutter with working surface passing arc fold |
US9103209B2 (en) * | 2014-03-25 | 2015-08-11 | Caterpillar Global Mining Llc | System for controlling speed of travel in a longwall shearer |
CN106761751B (en) * | 2016-12-28 | 2018-10-16 | 中国矿业大学 | A kind of multiple degrees of freedom Rocker coal mining machine and its method |
CN110207979B (en) * | 2019-06-21 | 2020-12-22 | 中国煤炭科工集团太原研究院有限公司 | Comprehensive performance test bed for walking mechanism of mining equipment |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2959405A (en) * | 1958-05-19 | 1960-11-08 | Union Carbide Corp | Strata mining-adjacent seam hardness indicator |
DE1534650A1 (en) * | 1966-03-31 | 1969-02-20 | Habegger Maschf | Method and device for controlling the milling drum rotation and the longitudinal feed for machines for driving underground routes |
US3400768A (en) * | 1966-06-16 | 1968-09-10 | Westinghouse Air Brake Co | Cutting machine load monitor control |
DE2426815C3 (en) * | 1974-06-04 | 1979-05-17 | Gebr. Eickhoff, Maschinenfabrik U. Eisengiesserei Mbh, 4630 Bochum | Method and device for regulating the continuously adjustable cutting and feed speed of roller cutting machines in underground mining |
US4099782A (en) * | 1976-02-18 | 1978-07-11 | Gewerkschaft Eisenhutte Westfalia | Control system for a mineral mining installation |
DE2842963A1 (en) * | 1978-10-02 | 1980-04-10 | Gewerk Eisenhuette Westfalia | Tunnelling machine with boom mounted rotary cutter - has hydraulic supply for actuators regulated by power requirement of cutter motor |
SU933992A1 (en) * | 1980-02-26 | 1982-06-07 | Научно-Производственное Объединение По Созданию И Выпуску Средств Автоматизации Горных Машин "Автоматгормаш" Министерства Угольной Промышленности Ссср | Method of monitoring coal-muck interface |
DE3127702C2 (en) | 1981-07-14 | 1983-12-29 | Bergwerksverband Gmbh, 4300 Essen | Method for regulating the cutting height of the rollers of shearer loaders |
JPS60181487A (en) * | 1984-02-24 | 1985-09-17 | 財団法人石炭技術研究所 | Double ranging drum cutter having load controller |
SU1270322A1 (en) * | 1985-05-29 | 1986-11-15 | Ордена Октябрьской Революции И Ордена Трудового Красного Знамени Институт Горного Дела Им.А.А.Скочинского | Apparatus for automatic steering of work-performing member of mining machine in seam hypsometry |
DE3631087A1 (en) * | 1986-09-12 | 1988-03-24 | Eickhoff Geb | Method of operating winning machines or selective-cut heading machines used in underground mining |
JPS6383394A (en) * | 1986-09-26 | 1988-04-14 | 株式会社三井三池製作所 | Double ranging drum cutter having operation length control apparatus |
US4753484A (en) * | 1986-10-24 | 1988-06-28 | Stolar, Inc. | Method for remote control of a coal shearer |
RU2065959C1 (en) * | 1993-09-07 | 1996-08-27 | Иван Кириллович Кривоконев | Extraction cutter-and-loader machine |
CA2141984C (en) * | 1995-02-07 | 2002-11-26 | Herbert A. Smith | Continuous control system for a mining or tunnelling machine |
RU2282719C1 (en) * | 2005-05-18 | 2006-08-27 | Государственное образовательное учреждение высшего профессионального образования Тульский государственный университет (ТулГУ) | Control device for cutting tool drive in front plant |
AT503378B1 (en) * | 2006-01-19 | 2008-09-15 | Voest Alpine Bergtechnik | METHOD FOR REGULATING THE DRIVE OF AN OPERATOR OR MACHINE |
-
2009
- 2009-02-14 DE DE102009009000A patent/DE102009009000B4/en not_active Expired - Fee Related
-
2010
- 2010-02-03 AU AU2010213198A patent/AU2010213198B2/en not_active Expired - Fee Related
- 2010-02-03 US US13/147,923 patent/US20120038202A1/en not_active Abandoned
- 2010-02-03 CN CN2010800077516A patent/CN102369340A/en active Pending
- 2010-02-03 RU RU2011132587/03A patent/RU2490452C2/en not_active IP Right Cessation
- 2010-02-03 WO PCT/EP2010/000644 patent/WO2010091814A2/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
RU2011132587A (en) | 2013-02-10 |
DE102009009000B4 (en) | 2011-01-05 |
DE102009009000A1 (en) | 2010-08-26 |
RU2490452C2 (en) | 2013-08-20 |
AU2010213198B2 (en) | 2013-11-28 |
WO2010091814A3 (en) | 2011-03-17 |
CN102369340A (en) | 2012-03-07 |
US20120038202A1 (en) | 2012-02-16 |
WO2010091814A2 (en) | 2010-08-19 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MK4 | Application lapsed section 142(2)(d) - no continuation fee paid for the application |