GB1241150A - Improvements relating to superstructure in self-advancing roof supports - Google Patents

Improvements relating to superstructure in self-advancing roof supports

Info

Publication number
GB1241150A
GB1241150A GB386870A GB386870A GB1241150A GB 1241150 A GB1241150 A GB 1241150A GB 386870 A GB386870 A GB 386870A GB 386870 A GB386870 A GB 386870A GB 1241150 A GB1241150 A GB 1241150A
Authority
GB
United Kingdom
Prior art keywords
bars
self
superstructure
roof supports
improvements relating
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.)
Expired
Application number
GB386870A
Inventor
Karl Maria Groetschel
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.)
Individual
Original Assignee
Individual
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 DE19691903890 external-priority patent/DE1903890C/en
Application filed by Individual filed Critical Individual
Publication of GB1241150A publication Critical patent/GB1241150A/en
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
    • E21D23/0047—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor without essential shifting 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)
  • Bridges Or Land Bridges (AREA)
  • Roof Covering Using Slabs Or Stiff Sheets (AREA)

Abstract

1,241,150. Advancing mine roof supports. K. M. GROETSCHEL. 27 Jan., 1970 [27 Jan., 1969], No. 3868/70. Heading E1P. In a self-advancing mine roof support, roof bars 16 are connected together by looped elastic, strip-like elements 20 in order to prevent lateral tilting. The elements take the form of spring steel strips and are connected to the bars via holders 25 connected to the underside of the bars. Modified connections are also described (Figs. 7, 8) including those in which the holders are positioned within the roof bars (Figs. 3, 4). Each element may be formed of two parts joined centrally (Fig. 5).
GB386870A 1969-01-27 1970-01-27 Improvements relating to superstructure in self-advancing roof supports Expired GB1241150A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691903890 DE1903890C (en) 1969-01-27 Touring extension with two clamped parts put together like a trestle

Publications (1)

Publication Number Publication Date
GB1241150A true GB1241150A (en) 1971-07-28

Family

ID=5723464

Family Applications (1)

Application Number Title Priority Date Filing Date
GB386870A Expired GB1241150A (en) 1969-01-27 1970-01-27 Improvements relating to superstructure in self-advancing roof supports

Country Status (1)

Country Link
GB (1) GB1241150A (en)

Also Published As

Publication number Publication date
DE1903890B2 (en) 1973-02-08
DE1903890A1 (en) 1972-02-24

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