FR2159249B1 - - Google Patents

Info

Publication number
FR2159249B1
FR2159249B1 FR7231238A FR7231238A FR2159249B1 FR 2159249 B1 FR2159249 B1 FR 2159249B1 FR 7231238 A FR7231238 A FR 7231238A FR 7231238 A FR7231238 A FR 7231238A FR 2159249 B1 FR2159249 B1 FR 2159249B1
Authority
FR
France
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.)
Expired
Application number
FR7231238A
Other languages
French (fr)
Other versions
FR2159249A1 (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.)
Kloeckner Werke AG
Original Assignee
Kloeckner Werke AG
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
Priority claimed from DE19712156431 external-priority patent/DE2156431C3/en
Application filed by Kloeckner Werke AG filed Critical Kloeckner Werke AG
Publication of FR2159249A1 publication Critical patent/FR2159249A1/fr
Application granted granted Critical
Publication of FR2159249B1 publication Critical patent/FR2159249B1/fr
Expired 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
    • E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
    • E21D23/06—Special mine caps or special tops of pit-props for permitting step-by-step movement
    • 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

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)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
FR7231238A 1971-11-13 1972-09-04 Expired FR2159249B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712156431 DE2156431C3 (en) 1971-11-13 Removable expansion unit for underground mining

Publications (2)

Publication Number Publication Date
FR2159249A1 FR2159249A1 (en) 1973-06-22
FR2159249B1 true FR2159249B1 (en) 1978-03-03

Family

ID=5825011

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7231238A Expired FR2159249B1 (en) 1971-11-13 1972-09-04

Country Status (1)

Country Link
FR (1) FR2159249B1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2732339C2 (en) * 1977-07-16 1990-03-29 Gewerkschaft Eisenhütte Westfalia, 4670 Lünen Longwall mining, especially longwall mining
DE3304982C2 (en) * 1982-05-08 1984-09-13 Hermann Hemscheidt Maschinenfabrik Gmbh & Co, 5600 Wuppertal Hydraulic control for a walking frame

Also Published As

Publication number Publication date
DE2156431A1 (en) 1973-05-17
FR2159249A1 (en) 1973-06-22
DE2156431B2 (en) 1975-09-11

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Legal Events

Date Code Title Description
ST Notification of lapse