BE520223A - - Google Patents
Info
- Publication number
- BE520223A BE520223A BE520223DA BE520223A BE 520223 A BE520223 A BE 520223A BE 520223D A BE520223D A BE 520223DA BE 520223 A BE520223 A BE 520223A
- Authority
- BE
- Belgium
- Prior art keywords
- roof
- support
- cylinder
- hydraulic
- accumulator
- Prior art date
Links
- 238000004891 communication Methods 0.000 claims description 14
- 239000012530 fluid Substances 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 13
- 238000005065 mining Methods 0.000 claims description 7
- 238000004146 energy storage Methods 0.000 claims description 6
- 238000007665 sagging Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 238000004904 shortening Methods 0.000 claims description 2
- 230000006835 compression Effects 0.000 claims 2
- 238000007906 compression Methods 0.000 claims 2
- 239000000126 substance Substances 0.000 claims 1
- 238000005192 partition Methods 0.000 description 2
- 238000013270 controlled release Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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
- E21D15/60—Devices for withdrawing props or chocks
- E21D15/606—Devices for withdrawing props or chocks the props being moved systematically
-
- 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
- E21D15/58—Devices for setting props or chocks
- E21D15/585—Devices for setting props or chocks by means of hydraulically operated devices for mechanical props, or hydraulic props in which the hydraulic part is not important
- E21D15/586—Devices for setting props or chocks by means of hydraulically operated devices for mechanical props, or hydraulic props in which the hydraulic part is not important the props being pre-loaded
- E21D15/587—Devices for setting props or chocks by means of hydraulically operated devices for mechanical props, or hydraulic props in which the hydraulic part is not important the props being pre-loaded by means of power accumulators to be pre-charged by rock pressure
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)
- Fluid-Pressure Circuits (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE520223A true BE520223A (enEXAMPLES) |
Family
ID=156183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE520223D BE520223A (enEXAMPLES) |
Country Status (1)
| Country | Link |
|---|---|
| BE (1) | BE520223A (enEXAMPLES) |
-
0
- BE BE520223D patent/BE520223A/fr unknown
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