PL261377A1 - Apparatus for controlling extendable roof cap cylinder in self-advancing roof supports - Google Patents

Apparatus for controlling extendable roof cap cylinder in self-advancing roof supports

Info

Publication number
PL261377A1
PL261377A1 PL26137786A PL26137786A PL261377A1 PL 261377 A1 PL261377 A1 PL 261377A1 PL 26137786 A PL26137786 A PL 26137786A PL 26137786 A PL26137786 A PL 26137786A PL 261377 A1 PL261377 A1 PL 261377A1
Authority
PL
Poland
Prior art keywords
roof
self
advancing
cap cylinder
supports
Prior art date
Application number
PL26137786A
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 filed Critical
Publication of PL261377A1 publication Critical patent/PL261377A1/en

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
    • E21D23/18—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices of advancing mechanisms

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)
PL26137786A 1985-09-14 1986-09-12 Apparatus for controlling extendable roof cap cylinder in self-advancing roof supports PL261377A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19853532941 DE3532941A1 (en) 1985-09-14 1985-09-14 Arrangement for controlling the slide-bar cylinder of hydraulic self-advancing support units

Publications (1)

Publication Number Publication Date
PL261377A1 true PL261377A1 (en) 1987-07-27

Family

ID=6281052

Family Applications (1)

Application Number Title Priority Date Filing Date
PL26137786A PL261377A1 (en) 1985-09-14 1986-09-12 Apparatus for controlling extendable roof cap cylinder in self-advancing roof supports

Country Status (2)

Country Link
DE (1) DE3532941A1 (en)
PL (1) PL261377A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3902134C2 (en) * 1989-01-25 1996-12-19 Dbt Gmbh Synchronous control for walking and sliding cap cylinders in walking extension units

Also Published As

Publication number Publication date
DE3532941A1 (en) 1987-03-19

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