AT259490B - Wandernder hydraulischer Strebausbau - Google Patents

Wandernder hydraulischer Strebausbau

Info

Publication number
AT259490B
AT259490B AT92965A AT92965A AT259490B AT 259490 B AT259490 B AT 259490B AT 92965 A AT92965 A AT 92965A AT 92965 A AT92965 A AT 92965A AT 259490 B AT259490 B AT 259490B
Authority
AT
Austria
Prior art keywords
migrating
longwall mining
hydraulic longwall
hydraulic
mining
Prior art date
Application number
AT92965A
Other languages
English (en)
Original Assignee
Gullick Ltd
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 Gullick Ltd filed Critical Gullick Ltd
Application granted granted Critical
Publication of AT259490B publication Critical patent/AT259490B/de

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
    • E21D23/006—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices
    • E21D23/0073—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices 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
    • E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
    • E21D23/18—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices of advancing mechanisms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/20—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors controlling several interacting or sequentially-operating members
    • F15B11/205—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors controlling several interacting or sequentially-operating members the position of the actuator controlling the fluid flow to the subsequent actuator

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Fluid-Pressure Circuits (AREA)
AT92965A 1964-02-04 1965-02-02 Wandernder hydraulischer Strebausbau AT259490B (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB476564A GB1038262A (en) 1964-02-04 1964-02-04 Improvements in or relating to advancing hydraulic mine roof and like supports

Publications (1)

Publication Number Publication Date
AT259490B true AT259490B (de) 1968-01-10

Family

ID=9783375

Family Applications (1)

Application Number Title Priority Date Filing Date
AT92965A AT259490B (de) 1964-02-04 1965-02-02 Wandernder hydraulischer Strebausbau

Country Status (4)

Country Link
AT (1) AT259490B (de)
DE (1) DE1258371B (de)
GB (1) GB1038262A (de)
NL (1) NL6501357A (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2759223C2 (de) * 1977-12-31 1983-01-05 Gewerkschaft Eisenhütte Westfalia, 4670 Lünen Hydraulisches Leitungssystem für eine untertägige Mineralgewinnungsanlage, insbesondere Gleithobelanlage
US4737482A (en) * 1983-07-25 1988-04-12 Exxon Research & Engineering Co. Catalysts for oxidation of olefins to ketones
US4876392A (en) * 1982-09-21 1989-10-24 Exxon Research & Engineering Company Process for preparation of keystones by oxidation of secondary alcohols using a trimetallic catalyst comprising molybdenum, rhenium and a group VIII noble metal

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1131626B (de) * 1958-04-14 1962-06-20 Kloeckner Werke Ag Verfahren und Vorrichtung zur Steuerung des Raub- und Setzvorganges von hydraulischen Strebausbaurahmen
DE1251256B (de) * 1959-10-12 1967-10-05 Coal Industry (Patents) Limited, London Wandernder Strebausbau
FR1271386A (fr) * 1959-10-12 1961-09-08 Coal Industry Patents Ltd Supports du toit des galeries de mines

Also Published As

Publication number Publication date
DE1258371B (de) 1968-01-11
GB1038262A (en) 1966-08-10
NL6501357A (de) 1965-08-05

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