GB862921A - Roof support frame for mine workings - Google Patents

Roof support frame for mine workings

Info

Publication number
GB862921A
GB862921A GB21056/57A GB2105657A GB862921A GB 862921 A GB862921 A GB 862921A GB 21056/57 A GB21056/57 A GB 21056/57A GB 2105657 A GB2105657 A GB 2105657A GB 862921 A GB862921 A GB 862921A
Authority
GB
United Kingdom
Prior art keywords
roof
toggles
props
roof support
floor
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
GB21056/57A
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
Application filed by Individual filed Critical Individual
Publication of GB862921A publication Critical patent/GB862921A/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
    • E21D23/006—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
    • E21D23/0069—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 without essential advancing 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)
  • Tents Or Canopies (AREA)
  • Pivots And Pivotal Connections (AREA)

Abstract

862,921. Mine roof supports. SCHMID, F. July 3, 1957 [July 3, 1956], No. 21056/57. Class 20(2) A mine roof support comprises floor and roof bars 3, 4 pivoted to two props 5, 6 in the form of toggles and a fluid pressure cylinder 7 operates between the toggle joints to extend the toggles. One of these props may be replaced by a conventional straight prop. The arms of the props are telescopically adjustable by means of pins 11a and the angle of the toggles may be adjusted by series of adjustment-connection holes 13a in the floor and roof bars. The roof support can be locked in position by means of stays 16 or the pistons may be locked in the cylinder. The floor and roof bars each comprise two members connected together by pivots 8, 9.
GB21056/57A 1956-07-03 1957-07-03 Roof support frame for mine workings Expired GB862921A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE862921X 1956-07-03

Publications (1)

Publication Number Publication Date
GB862921A true GB862921A (en) 1961-03-15

Family

ID=6799815

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21056/57A Expired GB862921A (en) 1956-07-03 1957-07-03 Roof support frame for mine workings

Country Status (1)

Country Link
GB (1) GB862921A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3855802A (en) * 1973-09-12 1974-12-24 G Alacchi Walking supporting pier for coal mines
US4382722A (en) * 1981-02-02 1983-05-10 Centrum Konstrukcyino-Technologiczne Maszyn Gorniczych "Komag" Nine lining structure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3855802A (en) * 1973-09-12 1974-12-24 G Alacchi Walking supporting pier for coal mines
US4382722A (en) * 1981-02-02 1983-05-10 Centrum Konstrukcyino-Technologiczne Maszyn Gorniczych "Komag" Nine lining structure

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