GB1248967A - Improvements in or relating to hydraulically-advanceable roof-supports, particularly for use in mines - Google Patents

Improvements in or relating to hydraulically-advanceable roof-supports, particularly for use in mines

Info

Publication number
GB1248967A
GB1248967A GB5712368A GB5712368A GB1248967A GB 1248967 A GB1248967 A GB 1248967A GB 5712368 A GB5712368 A GB 5712368A GB 5712368 A GB5712368 A GB 5712368A GB 1248967 A GB1248967 A GB 1248967A
Authority
GB
United Kingdom
Prior art keywords
block
supports
advancing
mines
hydraulically
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
GB5712368A
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.)
Hemscheidt Hermann Maschinenfabrik GmbH and Co
Hermann Hemscheidit Maschinenfabrik GmbH and Co
Original Assignee
Hemscheidt Hermann Maschinenfabrik GmbH and Co
Hermann Hemscheidit Maschinenfabrik GmbH and Co
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
Priority claimed from DE19681583800 external-priority patent/DE1583800A1/en
Application filed by Hemscheidt Hermann Maschinenfabrik GmbH and Co, Hermann Hemscheidit Maschinenfabrik GmbH and Co filed Critical Hemscheidt Hermann Maschinenfabrik GmbH and Co
Publication of GB1248967A publication Critical patent/GB1248967A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
    • E21D23/006—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices
    • E21D23/0078—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices with individual shifting devices

Abstract

1,248,967. Advancing mine roof supports. HERMANN HEMSCHEIDT MASCHINENFABRIK. 2 Dec., 1968 [29 Feb., 1968], No. 57123/68. Heading E1P. An advancing mine roof support is provided with an advancing ram 1 which is mounted in a spherical bearing 2 and pivotably connected to a bearing block 5. The block 5 is connected by a pair of pivotal thrust rods, see Fig. 2 (not shown), to the conveyor 7 whilst an elastically flexible guide rod 10 mounted on the conveyor passes through a friction bearing 14 in the block 5 and is guided in lugs 15, 16 to accommodate misalignment and relieve the ram of undesirable stresses, see also Fig. 4 (not shown).
GB5712368A 1968-02-29 1968-12-02 Improvements in or relating to hydraulically-advanceable roof-supports, particularly for use in mines Expired GB1248967A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681583800 DE1583800A1 (en) 1968-02-29 1968-02-29 Back device for hydraulic expansion units

Publications (1)

Publication Number Publication Date
GB1248967A true GB1248967A (en) 1971-10-06

Family

ID=5679560

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5712368A Expired GB1248967A (en) 1968-02-29 1968-12-02 Improvements in or relating to hydraulically-advanceable roof-supports, particularly for use in mines

Country Status (4)

Country Link
BE (1) BE725517A (en)
ES (1) ES362787A1 (en)
FR (1) FR1597857A (en)
GB (1) GB1248967A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112597677A (en) * 2020-12-11 2021-04-02 重庆大学 Method for judging maximum control jacking distance of coal mine tunneling working face

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112597677A (en) * 2020-12-11 2021-04-02 重庆大学 Method for judging maximum control jacking distance of coal mine tunneling working face
CN112597677B (en) * 2020-12-11 2022-12-27 重庆大学 Method for judging maximum control jacking distance of coal mine tunneling working face

Also Published As

Publication number Publication date
FR1597857A (en) 1970-06-29
ES362787A1 (en) 1970-11-16
BE725517A (en) 1969-05-29

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