EP2698500A3 - Prop - Google Patents

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Info

Publication number
EP2698500A3
EP2698500A3 EP13174793.3A EP13174793A EP2698500A3 EP 2698500 A3 EP2698500 A3 EP 2698500A3 EP 13174793 A EP13174793 A EP 13174793A EP 2698500 A3 EP2698500 A3 EP 2698500A3
Authority
EP
European Patent Office
Prior art keywords
prop
water
members
yielding
controls
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.)
Withdrawn
Application number
EP13174793.3A
Other languages
German (de)
French (fr)
Other versions
EP2698500A2 (en
Inventor
Christian Nissen
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.)
MINE SUPPORT PRODUCTS Pty Ltd
Original Assignee
MINE SUPPORT PRODUCTS Pty Ltd
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 MINE SUPPORT PRODUCTS Pty Ltd filed Critical MINE SUPPORT PRODUCTS Pty Ltd
Publication of EP2698500A2 publication Critical patent/EP2698500A2/en
Publication of EP2698500A3 publication Critical patent/EP2698500A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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 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
    • E21D15/28—Telescopic props with parts held relatively to each other by friction or gripping
    • E21D15/285—Telescopic props with parts held relatively to each other by friction or gripping by means of wedges or wedge combinations
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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
    • E21D15/51—Component parts or details of props specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves

Abstract

A prop which includes first and second telescopically engaged tubular members, wherein at least one member is internally pressurized with water and wherein yielding is controlled by means of a friction ring acting between opposing surfaces of the two members and by a release valve which controls the pressure of the water.
EP13174793.3A 2012-08-17 2013-07-02 Prop Withdrawn EP2698500A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ZA201206199 2012-08-17

Publications (2)

Publication Number Publication Date
EP2698500A2 EP2698500A2 (en) 2014-02-19
EP2698500A3 true EP2698500A3 (en) 2017-06-21

Family

ID=48782895

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13174793.3A Withdrawn EP2698500A3 (en) 2012-08-17 2013-07-02 Prop

Country Status (3)

Country Link
US (1) US20140050538A1 (en)
EP (1) EP2698500A3 (en)
AU (1) AU2013206571A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103912294B (en) * 2014-03-19 2016-05-18 北京天地玛珂电液控制系统有限公司 A kind of working surface hydraulic support group linearity control method that uses optical fiber
CN107905825A (en) * 2017-10-31 2018-04-13 山东里能鲁西矿业有限公司 It is a kind of new for no coal pillar mining and erosion control yield timbering
CN109057837A (en) * 2018-09-18 2018-12-21 安徽宝龙电器有限公司 A kind of self-adaptive hydraulic struts based on automatic monitoring system
CN113006837A (en) * 2021-02-03 2021-06-22 陕西陕煤韩城矿业有限公司 Modular single hydraulic prop

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2474464A (en) * 1947-04-24 1949-06-28 Cable Richard George Pit prop and the like
US3281107A (en) * 1965-12-15 1966-10-25 Ohio Brass Co Hydraulic support prop
US5720581A (en) * 1993-05-07 1998-02-24 Dorbyl Limited Support prop
US5921718A (en) * 1995-04-20 1999-07-13 Kolk; Theodor Prop for use in underground mining or tunnel construction
ZA996333B (en) * 1998-09-25 2000-04-10 Mine Support Products Propriet Support.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1765200A (en) * 1927-11-17 1930-06-17 Bullough Enoch Pit prop
SU1735592A1 (en) * 1986-11-27 1992-05-23 Институт Горного Дела Со Ан Ссср Hydraulic prop
ZA956530B (en) 1994-05-05 1996-05-23 Advanced Mining Software Ltd Prop

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2474464A (en) * 1947-04-24 1949-06-28 Cable Richard George Pit prop and the like
US3281107A (en) * 1965-12-15 1966-10-25 Ohio Brass Co Hydraulic support prop
US5720581A (en) * 1993-05-07 1998-02-24 Dorbyl Limited Support prop
US5921718A (en) * 1995-04-20 1999-07-13 Kolk; Theodor Prop for use in underground mining or tunnel construction
ZA996333B (en) * 1998-09-25 2000-04-10 Mine Support Products Propriet Support.

Also Published As

Publication number Publication date
AU2013206571A1 (en) 2014-03-06
EP2698500A2 (en) 2014-02-19
US20140050538A1 (en) 2014-02-20

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Effective date: 20171222