BE638218A - - Google Patents
Info
- Publication number
- BE638218A BE638218A BE638218DA BE638218A BE 638218 A BE638218 A BE 638218A BE 638218D A BE638218D A BE 638218DA BE 638218 A BE638218 A BE 638218A
- Authority
- BE
- Belgium
- Prior art keywords
- frame
- cylinder
- additional
- support
- advance
- Prior art date
Links
- 238000006073 displacement reaction Methods 0.000 claims description 5
- 210000000056 organ Anatomy 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 2
- 230000000284 resting effect Effects 0.000 claims 1
- 238000005065 mining Methods 0.000 description 3
- 210000003462 vein Anatomy 0.000 description 3
- 241000282836 Camelus dromedarius Species 0.000 description 2
- 241001633942 Dais Species 0.000 description 1
- 235000019987 cider Nutrition 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- VJYFKVYYMZPMAB-UHFFFAOYSA-N ethoprophos Chemical compound CCCSP(=O)(OCC)SCCC VJYFKVYYMZPMAB-UHFFFAOYSA-N 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000246 remedial effect Effects 0.000 description 1
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 1
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
- E21D23/0052—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor with advancing shifting devices connected therewith
-
- 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
- E21D23/0069—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 without essential advancing 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)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE638218A true BE638218A (Direct) |
Family
ID=203302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE638218D BE638218A (Direct) |
Country Status (1)
| Country | Link |
|---|---|
| BE (1) | BE638218A (Direct) |
-
0
- BE BE638218D patent/BE638218A/fr unknown
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