GB538277A - Improvements relating to mine roof or like supports - Google Patents

Improvements relating to mine roof or like supports

Info

Publication number
GB538277A
GB538277A GB113340A GB113340A GB538277A GB 538277 A GB538277 A GB 538277A GB 113340 A GB113340 A GB 113340A GB 113340 A GB113340 A GB 113340A GB 538277 A GB538277 A GB 538277A
Authority
GB
United Kingdom
Prior art keywords
main
relief valve
pressure
prop
cap
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
GB113340A
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 GB113340A priority Critical patent/GB538277A/en
Publication of GB538277A publication Critical patent/GB538277A/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
    • E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
    • 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
    • E21D15/46—Telescopic props with load-measuring devices; with alarm devices
    • E21D15/465—Telescopic props with load-measuring devices; with alarm devices with essential hydraulic or pneumatic details
    • 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
    • E21D15/50—Component parts or details of props
    • E21D15/52—Extensible units located above or below standard props
    • E21D15/523—Extensible units located above or below standard props with hydraulic or pneumatic control

Landscapes

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

Abstract

538,277. Pit-props. SMITH W. H. Jan. 18, 1940, No. 1133. [Class 20 (ii)] A mine-roof support comprises a main body-portion, a cap por. tion in the form of a sleeve fitting over the main portion fluid-pressure adjusting meams between the main and cap portions, and a relief valve operable from a distance to allow collapse of the support. The main prop body -A may be reinforced-con. crete covered at its upper end by a metal sleeve C to which is attached a bucket washer G tc secure tightness between the body and a cylinder cap B, which has limited movement on the main body. An inlet valve F for the pressure fluid and a relief valve H are provided in the cylinder wall, the. latter being controlled by a lever and a chain from a remote position. If the pressure on the prop becomes excessive, the pressure water may be caused to be ejected through the relief valve at high velocity so as to give visible and audible warning. As an alternative, the main prop body may be tubular and of corrugated metal.
GB113340A 1940-01-18 1940-01-18 Improvements relating to mine roof or like supports Expired GB538277A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB113340A GB538277A (en) 1940-01-18 1940-01-18 Improvements relating to mine roof or like supports

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB113340A GB538277A (en) 1940-01-18 1940-01-18 Improvements relating to mine roof or like supports

Publications (1)

Publication Number Publication Date
GB538277A true GB538277A (en) 1941-07-28

Family

ID=9716730

Family Applications (1)

Application Number Title Priority Date Filing Date
GB113340A Expired GB538277A (en) 1940-01-18 1940-01-18 Improvements relating to mine roof or like supports

Country Status (1)

Country Link
GB (1) GB538277A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3133720A (en) * 1962-03-27 1964-05-19 Commercial Shearing Yieldable pit posts
FR2297994A1 (en) * 1975-01-15 1976-08-13 Banyaszati Kutato Intezet Telescopic hydraulic pit prop - has tube from valve housing with radial ribs to inside of upper prop section
CN102444412A (en) * 2011-07-04 2012-05-09 山东新煤机械有限公司 Integrated intelligent mine pressure detection warning indicator
ES2636833A1 (en) * 2017-03-15 2017-10-09 Universitat Politècnica De València Load limiter for telescopic work props (Machine-translation by Google Translate, not legally binding)
CN117927278A (en) * 2024-03-22 2024-04-26 山东科技大学 Constant-resistance regulation and control monitoring device and method for steel pipe concrete pier column and construction method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3133720A (en) * 1962-03-27 1964-05-19 Commercial Shearing Yieldable pit posts
FR2297994A1 (en) * 1975-01-15 1976-08-13 Banyaszati Kutato Intezet Telescopic hydraulic pit prop - has tube from valve housing with radial ribs to inside of upper prop section
CN102444412A (en) * 2011-07-04 2012-05-09 山东新煤机械有限公司 Integrated intelligent mine pressure detection warning indicator
ES2636833A1 (en) * 2017-03-15 2017-10-09 Universitat Politècnica De València Load limiter for telescopic work props (Machine-translation by Google Translate, not legally binding)
CN117927278A (en) * 2024-03-22 2024-04-26 山东科技大学 Constant-resistance regulation and control monitoring device and method for steel pipe concrete pier column and construction method
CN117927278B (en) * 2024-03-22 2024-06-04 山东科技大学 Constant-resistance regulation and control monitoring device and method for steel pipe concrete pier column and construction method

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