NL256189A - - Google Patents

Info

Publication number
NL256189A
NL256189A NL256189DA NL256189A NL 256189 A NL256189 A NL 256189A NL 256189D A NL256189D A NL 256189DA NL 256189 A NL256189 A NL 256189A
Authority
NL
Netherlands
Prior art keywords
valve
ram
pressure
line
fluid
Prior art date
Application number
Other languages
English (en)
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.)
Publication of NL256189A publication Critical patent/NL256189A/xx

Links

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
    • 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
    • E21D23/0052—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor with advancing shifting devices connected therewith
    • 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
    • E21D23/08—Advancing mechanisms
    • E21D23/081—Advancing mechanisms forming parts of the roof supports
    • E21D23/085—Advancing mechanisms forming parts of the roof supports acting on a conveyor or a guide for the mining machine

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)
  • Fluid-Pressure Circuits (AREA)
  • Actuator (AREA)
  • Press Drives And Press Lines (AREA)
  • Carriers, Traveling Bodies, And Overhead Traveling Cranes (AREA)
NL256189D 1964-03-20 NL256189A (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB11932/64A GB1098628A (en) 1964-03-20 1964-03-20 Improvements in or relating to advancing roof supports

Publications (1)

Publication Number Publication Date
NL256189A true NL256189A (de)

Family

ID=9995302

Family Applications (2)

Application Number Title Priority Date Filing Date
NL256189D NL256189A (de) 1964-03-20
NL6503406A NL6503406A (de) 1964-03-20 1965-03-17

Family Applications After (1)

Application Number Title Priority Date Filing Date
NL6503406A NL6503406A (de) 1964-03-20 1965-03-17

Country Status (5)

Country Link
US (1) US3313211A (de)
DE (2) DE1205034B (de)
FR (1) FR1268264A (de)
GB (2) GB967163A (de)
NL (2) NL6503406A (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1458672B1 (de) * 1951-01-28 1970-02-26 Becorit Grubenausbau Gmbh Steuerung für einen wandernden hydraulischen Strebausbau
DE2901054A1 (de) * 1979-01-12 1980-07-17 Salzgitter Maschinen Ag Vorlaeufiger streckenausbau fuer durchbaubetriebe in strecken des untertaegigen bergbaus
GB2116618B (en) * 1982-03-06 1985-11-20 Dowty Mining Equipment Ltd Mine roof supports
DE202010001750U1 (de) 2010-02-02 2010-06-10 Karl Hamacher Gmbh Untertägige Medienversorgungsanordnung
CN110333017B (zh) * 2019-07-29 2020-12-01 宿州市金鼎安全技术股份有限公司 一种基于光纤光栅传感器的煤矿巷道顶板应力监测装置
CN110778346B (zh) * 2019-11-15 2020-07-03 西部黄金伊犁有限责任公司 一种用于发生矿井冒顶时的保护装置
CN111878140A (zh) * 2020-06-05 2020-11-03 范文 一种薄煤层开采用液压支架

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1069548B (de) * 1959-11-26
US1994974A (en) * 1930-06-21 1935-03-19 Oilgear Co Differential resistance valve
US2714505A (en) * 1948-05-01 1955-08-02 Joy Mfg Co Apparatus for mine roof control
US2657028A (en) * 1949-06-15 1953-10-27 Joy Mfg Co Walking jack
GB735294A (en) * 1952-03-04 1955-08-17 Bolton & Company Engineers Ltd Improvements relating to fluid-operated roof-supporting units for use in mines and like places
GB742850A (en) * 1952-12-06 1956-01-04 Hydrauliques Pour L Ind Minier Improved device for supporting the roofs of mine galleries
GB745679A (en) * 1953-07-08 1956-02-29 Dowty Auto Units Ltd Improvements in mine roof supports
AT184539B (de) * 1954-04-12 1956-01-25 Kloeckner Bergbau Victor Icker Wandernder Ausbau mit durch ein Druckmittel betätigten Ausbaugespannen
GB823128A (en) * 1955-02-23 1959-11-04 Dowty Mining Equipment Ltd Improvements in and relating to mine roof support systems
FR1153880A (fr) * 1955-04-04 1958-03-28 Dowty Mining Equipment Ltd Installation et appareil de soutènement hydraulique pour mines
US2859022A (en) * 1955-04-04 1958-11-04 Dowty Mining Equipment Ltd Hydraulic roof supports and conveyor feed jacks
FR1148920A (fr) * 1956-03-21 1957-12-18 Commande automatique de mise en marche d'un ou d'étançons automoteurs
FR1184882A (fr) * 1956-10-19 1959-07-27 Eisenwerk Wanheim Gmbh Soutènement mécanisé à étançons hydrauliques groupés par groupes doubles
FR1190532A (fr) * 1957-07-05 1959-10-13 Dobson Ltd W E & F Perfectionnements apportés aux supports de plafonds pour mines souterraines
FR1201174A (fr) * 1957-08-10 1959-12-29 Gewerk Eisenhuette Westfalia Procédé et dispositif pour la commande d'un soutènement hydraulique, utilisable notamment dans les mines
DE1131626B (de) * 1958-04-14 1962-06-20 Kloeckner Werke Ag Verfahren und Vorrichtung zur Steuerung des Raub- und Setzvorganges von hydraulischen Strebausbaurahmen
US2989950A (en) * 1958-06-04 1961-06-27 Lockman Nathan Pneumatic control device
FR1271386A (fr) * 1959-10-12 1961-09-08 Coal Industry Patents Ltd Supports du toit des galeries de mines
FR1337134A (fr) * 1961-10-30 1963-09-06 Dowty Mining Equipment Ltd Perfectionnements aux supports de toit de mine
GB991009A (en) * 1962-06-07 1965-05-05 Dowty Mining Equipment Ltd Mining apparatus

Also Published As

Publication number Publication date
DE1205034B (de) 1965-11-18
NL6503406A (de) 1965-09-21
FR1268264A (fr) 1961-07-28
DE1292605B (de) 1969-04-17
GB1098628A (en) 1968-01-10
GB967163A (en) 1964-08-19
DE1292605C2 (de) 1973-05-17
US3313211A (en) 1967-04-11

Similar Documents

Publication Publication Date Title
NL6503406A (de)
GB967164A (en) Mine roof support systems
GB1487294A (en) Stroke-speed control device for hydraulic unit
ES8402386A1 (es) Perfeccionamientos en un dispositivo para gobernar la carrera de un grupo de cilindros de un sistema de entibacion hidraulico.
GB1160907A (en) Hydraulic System
GB1025763A (en) An improved hydraulic control system for vehicle-borne equipment and implements
GB1500713A (en) Control means for mine roof supports
GB1362042A (en) Control device for a fluid-operated jack
GB991009A (en) Mining apparatus
GB1233188A (de)
GB1123975A (en) Hydraulically-operated advancing mine roof supports
GB1179758A (en) Hydraulic Mine Support Systems
GB1038262A (en) Improvements in or relating to advancing hydraulic mine roof and like supports
GB1374523A (en) Electrohydraulic stepping motor
GB1079860A (en) A control system for a pluratlity of hydraulically operable elements
GB1054630A (de)
GB1047094A (en) Hydraulic mine roof supports
GB1025879A (en) Mining apparatus
GB1115379A (en) Improvements in or relating to fluid control valves
GB1082663A (en) Improvements relating to control means of mine roof supports
GB980581A (en) Improvements in hydraulic roof supports or chocks for mines
GB1078138A (en) Improvements in or relating to hydraulic control apparatus
GB1114006A (en) Roof support assembly suitable for use in mines
GB987855A (en) Improvements in or relating to the synchronised operation of a number of hydraulic rams
GB918259A (en) Improvements in or relating to fluid supply means for hydraulic presses and the like