WO2009103305A1 - Verfahren zum steuern von strebbetrieben mittels grenzschichterkennung - Google Patents
Verfahren zum steuern von strebbetrieben mittels grenzschichterkennung Download PDFInfo
- Publication number
- WO2009103305A1 WO2009103305A1 PCT/EP2008/001264 EP2008001264W WO2009103305A1 WO 2009103305 A1 WO2009103305 A1 WO 2009103305A1 EP 2008001264 W EP2008001264 W EP 2008001264W WO 2009103305 A1 WO2009103305 A1 WO 2009103305A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- chisel
- mining
- borne sound
- rock
- sensor
- Prior art date
Links
- 238000005065 mining Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000011435 rock Substances 0.000 claims abstract description 28
- 239000003245 coal Substances 0.000 claims abstract description 18
- 238000000605 extraction Methods 0.000 claims abstract description 18
- 238000005520 cutting process Methods 0.000 claims description 11
- 230000035945 sensitivity Effects 0.000 claims description 5
- 230000001133 acceleration Effects 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 230000010355 oscillation Effects 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 8
- 238000010276 construction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 108010076504 Protein Sorting Signals Proteins 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- 230000000153 supplemental effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
- E21C25/56—Slitting by cutter cables or cutter chains or by tools drawn along the working face by cables or the like, in each case guided parallel to the face, e.g. by a conveyor or by a guide parallel to a conveyor
-
- 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
- E21C35/24—Remote control specially adapted for machines for slitting or completely freeing the mineral
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
-
- 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
- E21D23/12—Control, e.g. using remote control
Definitions
- the invention relates to a method for controlling a longwall conveyor, at least one mining machine and a hydraulic shield removal having longwall mining operations in underground coal mining.
- the invention is therefore based on the object to show a method of the type mentioned, which allows monitoring of an intervention of the mining machine in the adjacent rock.
- the basic idea of the invention is that at least one sensor for detecting structure-borne sound data generated by the intervention of the mining machine in coal and / or secondary rock is arranged on the shield extension points and in a downstream computer unit on the basis of the recorded structure-borne noise an incision of the mining machine into the neighboring rock is determined according to the vibration data.
- the invention first of all makes use of the finding that, when a mining machine intervenes in the coal on the one hand and in the neighboring rock on the other hand, the mining machine produces a different structure-borne noise which manifests itself in different vibrations transmitted in the neighboring rock horizon. Since during the extraction work, the individual shield expansion point are braced with correspondingly high pressure between the hanging and the lying, it is possible to tap in the field of a single shielding structure transmitted from the hanging or lying down structure-borne sound quasi in the manner of a stethoscope.
- an inclination sensor which is arranged in the floor skid and / or the hanging end cap of the shield fitting and is designed as an acceleration sensor with high sensitivity, is used to record the structure-borne sound data.
- inclination sensors are also provided for other control reasons associated with corresponding road construction equipment shield extension points, for example, to calculate from the inclination data of the Schildausbaugestelle the longwall, so that such inclination sensors are generally present and thus take on an additional task in boundary layer detection.
- At least one structure-borne sound microphone be used for detecting the structure-borne sound data or recording the vibration data on the floor cleat and / or the hanging end cap of the shield construction frame.
- the inventive method can be used in particular when using a roller cutter loader as a production machine, because the extraction bits arranged distributed over the circumference of the respective roller produce a corresponding structure-borne noise when they enter their cutting track and in the course of this cutting track.
- the frequency of the bit entry into the material to be cut depends on the number of revolutions of the roll, the stocking density of the roll with the mining chisels and the walking speed of the chipper.
- the structure-borne sound varies with the cutting resistance, which in turn depends on the nature of the coal or the secondary rock and the chip shape generated by the extraction chisel.
- Signal chisel are arranged.
- both the number and the angular distribution of the signal bits around the roller can be made variable. Since at a known circumferential distance between the signal bits, the respective engagement time of the signal bits can be determined in adjacent rock and / or coal, it is possible to calculate in this embodiment of the invention, the depth of engagement of the roller in the adjacent rock in the downstream computer unit. It is necessary that the signal bits have special mechanical properties compared to the normal mining bits.
- the signal bits may have a slightly increased cutting radius and / or a particular geometry and / or be supported in a particular bit holder, which generates a special natural frequency when cutting the roller in adjacent rock, which superimposes the engagement frequency of the signal bit in the secondary rock reinforcing ,
- a frequency analysis is provided for the evaluation of the recorded structure-borne sound data in order to make the required distinction between the large numbers on the roll extraction chisels and arranged only in a smaller number of signal chisels.
- a sensor for detecting the location of the mining machine is located in the longwall, so in the computer unit, a spatial relationship can be made between the position of the mining machine and the associated shield frame.
- FIG. 1 is a schematic side view of a shield expansion frame with inclination sensors arranged thereon in connection with a conveyor and a roller skid loader used as mining machine;
- FIG. 1 is a schematic side view of a shield expansion frame with inclination sensors arranged thereon in connection with a conveyor and a roller skid loader used as mining machine;
- FIG. 2 shows a mining machine according to FIG. 1 in a lying incision in a schematic illustration
- Fig. 4 shows an embodiment of the roller according to Figure 3 with additionally arranged thereon chisels.
- the longwall equipment shown in Figure 1 initially comprises a shield support frame 10 with a Bodenkufe 1 1, on the two pistons 12 are attached in a parallel arrangement, of which in Figure 1, only a stamp is recognizable and carry at its upper end a hanging wall 13. While the hanging end cap 13 protrudes at its front (left) end in the direction of the still to be described extraction machine, is on the rear, right end of the Hangendkappe 13 a broken shield 14 articulated by means of a joint 15, wherein the fracture shield 14 is supported by in the side view of two on the Bodenkufe 1 1 resting support arms 16.
- inclination sensors 17 Mounted on the shield support 10 are three inclination sensors 17, an inclination sensor 17 on the bottom skid 11, an inclination sensor 17 in the rear area of the hanging end cap 13 in the vicinity of the joint 15, and an inclination sensor 17 on the fracture shield 14.
- These inclination sensors are known in the art illustrated and described below with respect to the method of the invention described embodiment of trained on the Bodenkufe 1 1 inclination sensor 17 as an acceleration sensor with such high sensitivity that this sensitivity is suitable for receiving vibrations occurring at the Bodenkufe 1 1.
- the further tilt sensors can be used to control the expansion work in the longwall equipment shown in Figure 1, which is at most supplemental relevant to the realization of the present invention.
- stamp pressure sensor 18 additionally provided on a stamp 12 as well as a path measuring device 19 provided for in the area of the bottom recess for the walking mechanism.
- the shield support frame 10 shown in Figure 1 is struck on a conveyor 20, which also has a tilt sensor 21, so that in terms of the control of the longwall equipment in general also here data can be obtained in terms of conveyor position.
- a recovery machine in the form of a Walzenschrämladers 22 is guided with an upper roller 23 and a lower roller 24, wherein also in the region of the Walzenschrämladers 22, a tilt sensor 25 may be disposed, further, a sensor 26 for detecting the respective location of the Walzenschrämladers 22nd in the longwall and reed rods 27 for cutting height measurement.
- the lower roller 24 operates in an incision in the prone 29, wherein in turn the direction of rotation of the lower roller 24 is illustrated by the arrow 31.
- the placement of the lower roller 24 with extraction chisels 33 can be seen in addition from FIG. 3, the depth of the lying incision being indicated at 32. It can be seen that in the illustrated embodiment, two mining chisels 33 are simultaneously in the lying incision, while a mining chisel 33 cuts in the coal horizon 35 and the other mining chisel 33 are not in material engagement, thus rotate freely.
- This configuration is followed by different vibrations defined by the structure-borne noise generated by the engagement of the extraction chisel 33, which are transmitted in the horizontal plane 29, so that these vibrations are picked up by the inclination sensor 17 arranged in the bottom skid 11 of the shield support frame 12 and analyzed in the downstream computer unit can.
- a chisel 34 is still in full engagement with the prone 29, while the subsequent chisel 34 just begins its incision into the prone 29 according to the predetermined by the cruising speed of the roller engagement.
- the engagement cycle of the signal bits 34 with the free passage of the signal chisel, the cut in the neighboring rock and the cut into coal;
- knowing the rotational speed of the roller 24 and the length of the cutting phase of the individual signal bits can be identified over which period of time the signal bit cuts into engagement with the horizontal 29 and how long it is outside the lying incision. From this, the depth 32 of the horizontal section can be calculated.
- the selectivity of the inventive method is significantly improved.
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Remote Sensing (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Control Of Conveyors (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08707764A EP2242900A1 (de) | 2008-02-19 | 2008-02-19 | Verfahren zum steuern von strebbetrieben mittels grenzschichterkennung |
PCT/EP2008/001264 WO2009103305A1 (de) | 2008-02-19 | 2008-02-19 | Verfahren zum steuern von strebbetrieben mittels grenzschichterkennung |
UAA201009880A UA98036C2 (uk) | 2008-02-19 | 2008-02-19 | Спосіб керування механізованими видобуваннями за допомогою розпізнавання примежового шару |
AU2008351274A AU2008351274B2 (en) | 2008-02-19 | 2008-02-19 | Method for controlling longwall mining operations by identifying boundary layers |
US12/918,474 US8608248B2 (en) | 2008-02-19 | 2008-02-19 | Method for controlling longwall operations using boundary layer recognition |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2008/001264 WO2009103305A1 (de) | 2008-02-19 | 2008-02-19 | Verfahren zum steuern von strebbetrieben mittels grenzschichterkennung |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009103305A1 true WO2009103305A1 (de) | 2009-08-27 |
Family
ID=40210718
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2008/001264 WO2009103305A1 (de) | 2008-02-19 | 2008-02-19 | Verfahren zum steuern von strebbetrieben mittels grenzschichterkennung |
Country Status (5)
Country | Link |
---|---|
US (1) | US8608248B2 (de) |
EP (1) | EP2242900A1 (de) |
AU (1) | AU2008351274B2 (de) |
UA (1) | UA98036C2 (de) |
WO (1) | WO2009103305A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2462593C1 (ru) * | 2011-03-14 | 2012-09-27 | Учреждение Российской академии наук Институт угля Сибирского отделения РАН (ИУ СО РАН) | Способ разработки мощного крутого угольного пласта полосами по падению |
CN108222994A (zh) * | 2017-12-26 | 2018-06-29 | 山东科技大学 | 采煤工作面支架定位系统及方法 |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102011587A (zh) * | 2010-11-09 | 2011-04-13 | 枣庄矿业集团付村煤业有限公司 | 不规则综放工作面煤炭开采方法 |
CN102418541B (zh) * | 2011-08-23 | 2013-12-25 | 三一重型装备有限公司 | 一种刨煤机液压支架自动移架方法、装置及系统 |
DE102011053984A1 (de) * | 2011-09-27 | 2013-03-28 | Caterpillar Global Mining Europe Gmbh | Vorrichtung für die fräsende und/oder bohrende Bearbeitung von Materialien und Verfahren hierfür |
CN102619541A (zh) * | 2012-04-06 | 2012-08-01 | 徐州中矿厚德物联科技有限公司 | 煤矿工作面虚拟3d联动显示调度系统 |
CN103174423B (zh) * | 2013-02-05 | 2015-03-04 | 中国矿业大学 | 采煤机煤岩实时监测识别装置及方法 |
US8985699B2 (en) | 2013-03-14 | 2015-03-24 | Seneca Industries Inc. | Mining methods and equipment |
CN103927514B (zh) * | 2014-04-09 | 2017-07-25 | 中国矿业大学(北京) | 一种基于随机局部图像特征的煤岩识别方法 |
CN104564157A (zh) * | 2014-12-19 | 2015-04-29 | 中国矿业大学(北京) | 一种适用于综放工作面顶煤放落的煤岩性状识别传感装置 |
CN105607630B (zh) * | 2016-03-22 | 2018-09-07 | 日立楼宇技术(广州)有限公司 | 煤矿用液压支架电液控制系统初始化状态自检方法及装置 |
CN108534975B (zh) * | 2018-03-14 | 2019-08-13 | 山东科技大学 | 一种放顶煤煤矸界面识别试验系统 |
CN109184692A (zh) * | 2018-11-13 | 2019-01-11 | 西安科技大学 | 一种急倾斜煤层临界伪斜角综合机械化开采方法 |
CN109613900B (zh) * | 2018-12-26 | 2021-07-02 | 山东省田庄煤矿有限公司 | 一种刨煤作业综合监控系统及刨煤机作业综合监控中心 |
CN112096384B (zh) * | 2020-09-29 | 2021-06-22 | 中国矿业大学(北京) | 一种综放开采煤矸混合度监测系统、控制放煤方法及系统 |
CN113339074B (zh) * | 2021-07-16 | 2023-07-25 | 国能神东煤炭集团有限责任公司 | 一种综采工作面煤岩识别探测系统 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3127702A1 (de) | 1981-07-14 | 1983-02-03 | Bergwerksverband Gmbh, 4300 Essen | Verfahren zur regelung der schnitthoehe der walzen von walzenladern |
DE3338114A1 (de) * | 1983-10-20 | 1985-05-02 | Bergwerksverband Gmbh, 4300 Essen | Verfahren zur automation einer schaelenden oder schneidenden gewinnungsanlage |
DE3742184A1 (de) * | 1987-12-12 | 1989-06-22 | Hemscheidt Maschf Hermann | Steuersystem fuer bergbautechnische vorrichtungen |
DE4414578A1 (de) * | 1994-04-27 | 1995-11-02 | Westfalia Becorit Ind Tech | Vorrichtung zur automatischen Einstellung des Schneidhorizontes einer Bergbau-Gewinnungsanlage |
DE10354281A1 (de) * | 2003-11-20 | 2005-06-23 | Marco Systemanalyse Und Entwicklung Gmbh | Sensor |
DE102005005869A1 (de) * | 2005-02-09 | 2006-08-17 | Rag Ag | Verfahren zum Steuern einer Gewinnungsmaschine in Betrieben des untertägigen Steinkohlenbergbaus |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2733405C3 (de) * | 1977-07-23 | 1982-03-04 | Gebr. Eickhoff, Maschinenfabrik U. Eisengiesserei Mbh, 4630 Bochum | Meßvorrichtung, insbesondere für untertage eingesetzte Walzenschrämmaschinen |
GB2092207A (en) * | 1981-01-24 | 1982-08-11 | Dobson Park Ind | Improvements in or relating to mining systems |
US4968098A (en) * | 1989-09-11 | 1990-11-06 | Atlantic Richfield Company | Coal seam discontinuity sensor and method for coal mining apparatus |
DE3941290A1 (de) * | 1989-12-14 | 1991-06-20 | Bochumer Eisen Heintzmann | Verfahren fuer die ueberwachung und steuerung von betriebsablaeufen in einem bergmaennischen untertagebetrieb und ueberwachungs- und steuereinrichtung dazu |
-
2008
- 2008-02-19 US US12/918,474 patent/US8608248B2/en not_active Expired - Fee Related
- 2008-02-19 WO PCT/EP2008/001264 patent/WO2009103305A1/de active Application Filing
- 2008-02-19 EP EP08707764A patent/EP2242900A1/de not_active Withdrawn
- 2008-02-19 UA UAA201009880A patent/UA98036C2/uk unknown
- 2008-02-19 AU AU2008351274A patent/AU2008351274B2/en not_active Ceased
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3127702A1 (de) | 1981-07-14 | 1983-02-03 | Bergwerksverband Gmbh, 4300 Essen | Verfahren zur regelung der schnitthoehe der walzen von walzenladern |
DE3338114A1 (de) * | 1983-10-20 | 1985-05-02 | Bergwerksverband Gmbh, 4300 Essen | Verfahren zur automation einer schaelenden oder schneidenden gewinnungsanlage |
DE3742184A1 (de) * | 1987-12-12 | 1989-06-22 | Hemscheidt Maschf Hermann | Steuersystem fuer bergbautechnische vorrichtungen |
DE4414578A1 (de) * | 1994-04-27 | 1995-11-02 | Westfalia Becorit Ind Tech | Vorrichtung zur automatischen Einstellung des Schneidhorizontes einer Bergbau-Gewinnungsanlage |
DE10354281A1 (de) * | 2003-11-20 | 2005-06-23 | Marco Systemanalyse Und Entwicklung Gmbh | Sensor |
DE102005005869A1 (de) * | 2005-02-09 | 2006-08-17 | Rag Ag | Verfahren zum Steuern einer Gewinnungsmaschine in Betrieben des untertägigen Steinkohlenbergbaus |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2462593C1 (ru) * | 2011-03-14 | 2012-09-27 | Учреждение Российской академии наук Институт угля Сибирского отделения РАН (ИУ СО РАН) | Способ разработки мощного крутого угольного пласта полосами по падению |
CN108222994A (zh) * | 2017-12-26 | 2018-06-29 | 山东科技大学 | 采煤工作面支架定位系统及方法 |
CN108222994B (zh) * | 2017-12-26 | 2019-12-17 | 山东科技大学 | 采煤工作面支架定位系统及方法 |
Also Published As
Publication number | Publication date |
---|---|
US8608248B2 (en) | 2013-12-17 |
AU2008351274A1 (en) | 2009-08-27 |
EP2242900A1 (de) | 2010-10-27 |
AU2008351274B2 (en) | 2012-06-28 |
US20110001348A1 (en) | 2011-01-06 |
UA98036C2 (uk) | 2012-04-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2009103305A1 (de) | Verfahren zum steuern von strebbetrieben mittels grenzschichterkennung | |
DE102009030130B9 (de) | Verfahren zur automatisierten Herstellung einer definierten Streböffnung durch neigungsgestützte Radarnavigation der Walze bei einem Walzenschrämlader und eine Vorrichtung hierfür | |
EP2247823B1 (de) | Verfahren zum steuern von strebbetrieben | |
EP2467577B1 (de) | Verfahren zur herstellung einer streböffnung unter einsatz von automatisierungssystemen | |
EP2247825B1 (de) | Verfahren zur automatischen herstellung einer definierten streböffnung in hobelbetrieben des steinkohlenbergbaus | |
EP2366059B1 (de) | Verfahren zur einstellung einer automatischen niveausteuerung des hobels in hobelbetrieben des steinkohlenbergbaus | |
DE102007035848C5 (de) | Ausbauschild und Verfahren zur Steuerung oder Positionsbestimmung eines Ausbauschildes | |
EP2247824B1 (de) | Verfahren zu einer automatischen herstellung einer definierten streböffnung bei strebbetrieben im untertägigen steinkohlenbergbau | |
DE2733405C3 (de) | Meßvorrichtung, insbesondere für untertage eingesetzte Walzenschrämmaschinen | |
DE2714506C2 (de) | Verfahren und Einrichtung zur Überwachung und Steuerung von Strebausrüstungen | |
WO2010020359A1 (de) | Verfahren zur positions- und lagebestimmung von grubenräumen und/oder betriebsmitteln unter nutzung der rfid-technik | |
WO2012031610A1 (de) | Steuerung der gewinnungsarbeit im untertägigen steinkohlenbergbau mittels einer lasermessvorrichtung | |
WO2009103306A1 (de) | Verfahren zur stabilisierung der schildsäule bei einem im flözeinfallen geführten strebbetrieb | |
WO2009103304A1 (de) | Verfahren zur gesteuerten einhaltung eines kappe-kohlenstoss-abstandes bei strebbetrieben | |
DE102008026456A1 (de) | Bohrkopf | |
DE2441554A1 (de) | Verfahren zum abbauen einer minerallagerstaette | |
DE102008050068B3 (de) | Verfahren zum Steuern der Gewinnung in Strebbetrieben mittels Überwachung des Bergeanteils in der Förderung | |
DE102005005869B4 (de) | Verfahren zum Steuern einer Gewinnungsmaschine in Betrieben des untertägigen Steinkohlenbergbaus | |
DE4439601C2 (de) | Verfahren zur Richtungssteuerung einer im Untertagebetrieb eingesetzten Maschine sowie zur Durchführung des Verfahrens geeignete Maschine | |
EP3551828B1 (de) | Verfahren und system zum ermitteln einer bodenklasse | |
DE2850297C2 (de) | Vorrichtung zur Überwachung und Erkennung von Gebirgsschlaggefahr | |
DE102008053133A1 (de) | Verfahren zur automatischen Herstellung einer definierten Streböffnung in Hobelbetrieben des Steinkohlenbergbaus | |
DE102007012678B3 (de) | Verfahren zum Steuern von Strebbetrieben im untertägigen Steinkohlenbergbau | |
EP0760900B1 (de) | Verfahren zur optimalen gasgewinnung in einer grossräumigen und bergmännisch nicht oder gering aufgeklärten steinkohlenlagerstätte | |
DE102006041572B4 (de) | Ausbauschild für den Untertagebau |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 08707764 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2008707764 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2008351274 Country of ref document: AU |
|
ENP | Entry into the national phase |
Ref document number: 2008351274 Country of ref document: AU Date of ref document: 20080219 Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 12918474 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: A201009880 Country of ref document: UA |