GB368877A - Improvements in and relating to pit props, arches and the like - Google Patents

Improvements in and relating to pit props, arches and the like

Info

Publication number
GB368877A
GB368877A GB3875530A GB3875530A GB368877A GB 368877 A GB368877 A GB 368877A GB 3875530 A GB3875530 A GB 3875530A GB 3875530 A GB3875530 A GB 3875530A GB 368877 A GB368877 A GB 368877A
Authority
GB
United Kingdom
Prior art keywords
rubble
arches
prop
recess
joint
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
GB3875530A
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
Priority to GB3875530A priority Critical patent/GB368877A/en
Publication of GB368877A publication Critical patent/GB368877A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/14—Telescopic props
    • E21D15/16—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure
    • E21D15/18—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with one part resting on a supporting medium, e.g. rubber, sand, bitumen, lead, located in the other part, with or without expulsion or displacement of the medium upon excessive pressure
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/14—Lining predominantly with metal
    • E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
    • E21D11/183—Supporting means for arch members, not provided for in E21D11/22

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Foundations (AREA)

Abstract

368,877. Mine roof supports. THOMAS, W., Porth Farm, Rhondda, Glamorgan. Dec. 23, 1930, No. 38755. [Class 20 (ii).] Pit-props or arches for mines are formed of two main members 7, 8, with inclined meeting surfaces 9 which are maintained in locked position by means of a dowel or ball 12 which enters a recess in the upper member and is mounted to slide in a recess 11 of the other member, debris or rubble being placed beneath the locking member. In order to unlock the joint, a sliding sleeve 14 is provided which normally covers discharge apertures 13 for the rubble, but can be slidden downwardly to allow discharge of rubble and lowering of the locking member, so that the joint is free and the prop collapses. To provide for adjustability, a sliding-sleeve extension 19 may be provided supported by a wooden wedge 22 or by means of rubble 25 on the part 8 of the prop.
GB3875530A 1930-12-23 1930-12-23 Improvements in and relating to pit props, arches and the like Expired GB368877A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3875530A GB368877A (en) 1930-12-23 1930-12-23 Improvements in and relating to pit props, arches and the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3875530A GB368877A (en) 1930-12-23 1930-12-23 Improvements in and relating to pit props, arches and the like

Publications (1)

Publication Number Publication Date
GB368877A true GB368877A (en) 1932-03-17

Family

ID=10405498

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3875530A Expired GB368877A (en) 1930-12-23 1930-12-23 Improvements in and relating to pit props, arches and the like

Country Status (1)

Country Link
GB (1) GB368877A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4069680A (en) * 1976-03-10 1978-01-24 Hochtief Ag Fur Hoch-Und Tiefbauten Vorm. Gebr. Helfmann Method of and apparatus for the anchoring of drilling and production platforms on a structure sunk on a sea bottom

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4069680A (en) * 1976-03-10 1978-01-24 Hochtief Ag Fur Hoch-Und Tiefbauten Vorm. Gebr. Helfmann Method of and apparatus for the anchoring of drilling and production platforms on a structure sunk on a sea bottom

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