GB775998A - Improvements in or relating to mine props - Google Patents

Improvements in or relating to mine props

Info

Publication number
GB775998A
GB775998A GB2247754A GB2247754A GB775998A GB 775998 A GB775998 A GB 775998A GB 2247754 A GB2247754 A GB 2247754A GB 2247754 A GB2247754 A GB 2247754A GB 775998 A GB775998 A GB 775998A
Authority
GB
United Kingdom
Prior art keywords
head plate
projections
girders
grooves
another
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
GB2247754A
Inventor
Rudolf Beyer
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.)
Becorit Grubenausbau GmbH
Original Assignee
Becorit Grubenausbau 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 Becorit Grubenausbau GmbH filed Critical Becorit Grubenausbau GmbH
Priority to GB2247754A priority Critical patent/GB775998A/en
Publication of GB775998A publication Critical patent/GB775998A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D17/00—Caps for supporting mine roofs
    • E21D17/10—Details of mine caps for engaging the tops of pit-props, with or without retaining-plates; Retaining-plates

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)

Abstract

775,998. Pit props and girders. BECORIT-GRUBENAUSBAU GES. Aug. 3, 1954, No. 22477/54. Class 20(2) A pit prop is provided with a head plate 1 shaped to support corrugated roof caps or girders 5, characterized in that the surface of the head plate is provided, in two vertical cross-sectional planes directed perpendicular with one another; with symmetrically distributed tooth like projections 2 which are arranged at equal distances from one another, the projections and the grooves 3 therebetween having approximately identical cross-sectional areas. In the described embodiment the head plate 1 is square in plan and the projections are formed by two grooves 3 in each of the two directions of the vertical planes. The head plate may be of round or oval shape.
GB2247754A 1954-08-03 1954-08-03 Improvements in or relating to mine props Expired GB775998A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2247754A GB775998A (en) 1954-08-03 1954-08-03 Improvements in or relating to mine props

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2247754A GB775998A (en) 1954-08-03 1954-08-03 Improvements in or relating to mine props

Publications (1)

Publication Number Publication Date
GB775998A true GB775998A (en) 1957-05-29

Family

ID=10180014

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2247754A Expired GB775998A (en) 1954-08-03 1954-08-03 Improvements in or relating to mine props

Country Status (1)

Country Link
GB (1) GB775998A (en)

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