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FR2418329A1 - Mine roof support hydraulic control system - has cylinder operated by main valve and low pressure operated changeover valve - Google Patents

Mine roof support hydraulic control system - has cylinder operated by main valve and low pressure operated changeover valve

Info

Publication number
FR2418329A1
FR2418329A1 FR7901228A FR7901228A FR2418329A1 FR 2418329 A1 FR2418329 A1 FR 2418329A1 FR 7901228 A FR7901228 A FR 7901228A FR 7901228 A FR7901228 A FR 7901228A FR 2418329 A1 FR2418329 A1 FR 2418329A1
Authority
FR
France
Prior art keywords
cylinder
valve
control system
low pressure
hydraulic control
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
Application number
FR7901228A
Other languages
French (fr)
Other versions
FR2418329B1 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gewerkschaft Eisenhutte Westfalia GmbH
Original Assignee
Gewerkschaft Eisenhutte Westfalia GmbH
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 Gewerkschaft Eisenhutte Westfalia GmbH filed Critical Gewerkschaft Eisenhutte Westfalia GmbH
Publication of FR2418329A1 publication Critical patent/FR2418329A1/en
Application granted granted Critical
Publication of FR2418329B1 publication Critical patent/FR2418329B1/fr
Granted legal-status Critical Current

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
    • E21D23/26—Hydraulic or pneumatic control
    • 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
    • E21D23/03—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor having protective means, e.g. shields, for preventing or impeding entry of loose material into the working space or support

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)
  • Lifting Devices For Agricultural Implements (AREA)
  • Floor Finish (AREA)

Abstract

The mine system includes two roof members with angle shaped end members to close the gap between them, and also an adjacent unit. The travel of each end member is controlled by a hydraulic cylinder parallel with the roof member. Each cylinder is in turn controlled by a valve arrangement. A line connects these valves with the chamber of the cylinder, and the changeover valve is connected to a supply line at a lower pressure than the pressure required to operate the cylinder. This valve operates automatically in response to the load on the cylinder. The other valve is the operating valve, connecting the high pressure supply to the cylinder.
FR7901228A 1978-02-25 1979-01-18 Mine roof support hydraulic control system - has cylinder operated by main valve and low pressure operated changeover valve Granted FR2418329A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782808205 DE2808205C2 (en) 1978-02-25 1978-02-25 Hydraulic control for a gap cover arranged on the cap or on the breakage shield of a walking support

Publications (2)

Publication Number Publication Date
FR2418329A1 true FR2418329A1 (en) 1979-09-21
FR2418329B1 FR2418329B1 (en) 1983-05-27

Family

ID=6032957

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7901228A Granted FR2418329A1 (en) 1978-02-25 1979-01-18 Mine roof support hydraulic control system - has cylinder operated by main valve and low pressure operated changeover valve

Country Status (5)

Country Link
CS (1) CS219345B2 (en)
DE (1) DE2808205C2 (en)
ES (1) ES478021A1 (en)
FR (1) FR2418329A1 (en)
PL (1) PL119297B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010026977B4 (en) * 2010-07-13 2016-06-02 Marco Systemanaslyse Und Entwicklung Gmbh Method for shield control

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE657410A (en) * 1963-12-24 1965-04-16
GB1117312A (en) * 1964-10-16 1968-06-19 Coal Industry Patents Ltd Self advancing roof supports in inclined mineral seams
FR2128636A1 (en) * 1971-03-05 1972-10-20 Sanyaszati Kutato Inteze
DE2350482A1 (en) * 1973-10-08 1975-04-10 Hemscheidt Maschf Hermann Mine support shield with gap seals - has caving shield with duplex cylinders controlled by prop yield between skid and shield
DE2502109A1 (en) * 1974-01-19 1975-07-24 Dowty Mining Equipment Ltd PIT CEILING SUPPORT

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE657410A (en) * 1963-12-24 1965-04-16
GB1117312A (en) * 1964-10-16 1968-06-19 Coal Industry Patents Ltd Self advancing roof supports in inclined mineral seams
FR2128636A1 (en) * 1971-03-05 1972-10-20 Sanyaszati Kutato Inteze
DE2350482A1 (en) * 1973-10-08 1975-04-10 Hemscheidt Maschf Hermann Mine support shield with gap seals - has caving shield with duplex cylinders controlled by prop yield between skid and shield
DE2502109A1 (en) * 1974-01-19 1975-07-24 Dowty Mining Equipment Ltd PIT CEILING SUPPORT

Also Published As

Publication number Publication date
CS219345B2 (en) 1983-03-25
DE2808205C2 (en) 1985-10-10
DE2808205A1 (en) 1979-09-06
FR2418329B1 (en) 1983-05-27
PL213644A1 (en) 1979-11-19
PL119297B1 (en) 1981-12-31
ES478021A1 (en) 1979-12-01

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Legal Events

Date Code Title Description
ST Notification of lapse