GB635661A - Improvements in or relating to extensible mine roof supports - Google Patents

Improvements in or relating to extensible mine roof supports

Info

Publication number
GB635661A
GB635661A GB169348A GB169348A GB635661A GB 635661 A GB635661 A GB 635661A GB 169348 A GB169348 A GB 169348A GB 169348 A GB169348 A GB 169348A GB 635661 A GB635661 A GB 635661A
Authority
GB
United Kingdom
Prior art keywords
gas
relating
mine roof
roof supports
mine
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
GB169348A
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.)
LOGAN MINING MACHINERY Co
WILLIAM ARCHIBALD LOGAN
Original Assignee
LOGAN MINING MACHINERY Co
WILLIAM ARCHIBALD LOGAN
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 LOGAN MINING MACHINERY Co, WILLIAM ARCHIBALD LOGAN filed Critical LOGAN MINING MACHINERY Co
Priority to GB169348A priority Critical patent/GB635661A/en
Publication of GB635661A publication Critical patent/GB635661A/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

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)
  • Catching Or Destruction (AREA)

Abstract

635,661. Hydraulic mine props. LOGAN MINING MACHINERY CO., Ltd., and LOGAN, W. A. Jan. 20, 1948, No. 1693. [Class 20 (ii)] [Also in Group XXX] A mine prop is extended by gas from a pierced gas cartridge 13, which displaces oil from a chamber 11 through a non-return valve to cylinder 8 so as to raise the plunger 9 against the mine roof. A valve is opened to release the gas to atmosphere whereupon the oil returns to the chamber 11 through another valve which is temporarily opened. The cartridge is pierced by means of a needle 15 operated by a pedal 16.
GB169348A 1948-01-20 1948-01-20 Improvements in or relating to extensible mine roof supports Expired GB635661A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB169348A GB635661A (en) 1948-01-20 1948-01-20 Improvements in or relating to extensible mine roof supports

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB169348A GB635661A (en) 1948-01-20 1948-01-20 Improvements in or relating to extensible mine roof supports

Publications (1)

Publication Number Publication Date
GB635661A true GB635661A (en) 1950-04-12

Family

ID=9726366

Family Applications (1)

Application Number Title Priority Date Filing Date
GB169348A Expired GB635661A (en) 1948-01-20 1948-01-20 Improvements in or relating to extensible mine roof supports

Country Status (1)

Country Link
GB (1) GB635661A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101864972A (en) * 2010-06-04 2010-10-20 中煤北京煤矿机械有限责任公司 Small supporting point full-protection-type tunnel bracket and supporting method thereof
CN102996151A (en) * 2012-11-13 2013-03-27 洛阳金马电气科技有限公司 Method and device for increasing working space of working face under shaft lower than 1.8m

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101864972A (en) * 2010-06-04 2010-10-20 中煤北京煤矿机械有限责任公司 Small supporting point full-protection-type tunnel bracket and supporting method thereof
CN102996151A (en) * 2012-11-13 2013-03-27 洛阳金马电气科技有限公司 Method and device for increasing working space of working face under shaft lower than 1.8m
CN102996151B (en) * 2012-11-13 2017-08-25 河南中车重型装备有限公司 A kind of method and device of less than the 1.8 meters increase working face working spaces in underground

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