ES362787A1 - 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 minesInfo
- Publication number
- ES362787A1 ES362787A1 ES362787A ES362787A ES362787A1 ES 362787 A1 ES362787 A1 ES 362787A1 ES 362787 A ES362787 A ES 362787A ES 362787 A ES362787 A ES 362787A ES 362787 A1 ES362787 A1 ES 362787A1
- Authority
- ES
- Spain
- Prior art keywords
- block
- mines
- hydraulically
- relating
- supports
- 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
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
- Support Of The Bearing (AREA)
Abstract
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).
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 |
---|---|
ES362787A1 true ES362787A1 (en) | 1970-11-16 |
Family
ID=5679560
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES362787A Expired ES362787A1 (en) | 1968-02-29 | 1969-01-21 | 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) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
-
1968
- 1968-12-02 GB GB5712368A patent/GB1248967A/en not_active Expired
- 1968-12-16 FR FR1597857D patent/FR1597857A/fr not_active Expired
- 1968-12-16 BE BE725517D patent/BE725517A/xx unknown
-
1969
- 1969-01-21 ES ES362787A patent/ES362787A1/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB1248967A (en) | 1971-10-06 |
BE725517A (en) | 1969-05-29 |
FR1597857A (en) | 1970-06-29 |
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