BE516770A - - Google Patents
Info
- Publication number
- BE516770A BE516770A BE516770DA BE516770A BE 516770 A BE516770 A BE 516770A BE 516770D A BE516770D A BE 516770DA BE 516770 A BE516770 A BE 516770A
- Authority
- BE
- Belgium
- Prior art keywords
- tool
- heads
- holder
- drilling
- sleeves
- Prior art date
Links
- 238000005553 drilling Methods 0.000 claims description 22
- 239000003638 chemical reducing agent Substances 0.000 claims description 4
- 230000000284 resting effect Effects 0.000 claims description 2
- 230000002441 reversible effect Effects 0.000 claims description 2
- 210000003462 vein Anatomy 0.000 description 9
- 239000003245 coal Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 235000004035 Cryptotaenia japonica Nutrition 0.000 description 1
- 235000016936 Dendrocalamus strictus Nutrition 0.000 description 1
- 102000007641 Trefoil Factors Human genes 0.000 description 1
- 235000015724 Trifolium pratense Nutrition 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
- E21C25/58—Machines slitting by drilling hole on hole
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Earth Drilling (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE516770A true BE516770A (de) |
Family
ID=153868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE516770D BE516770A (de) |
Country Status (1)
| Country | Link |
|---|---|
| BE (1) | BE516770A (de) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1174726B (de) * | 1957-07-02 | 1964-07-30 | Dipl Berging Albrecht Graefer | Zweispindelige Grosslochbohrmaschine |
| DE1180334B (de) * | 1955-08-02 | 1964-10-29 | Coal Industry Patents Ltd | Abbaueinrichtung fuer flach gelagerte Floeze geringer Maechtigkeit |
| DE1758851B1 (de) * | 1968-08-20 | 1971-09-23 | Bergwerksverband Gmbh | Hydromechanische Bohreinrichtung zur Herstellung floezgaengiger Zielbohrungen |
-
0
- BE BE516770D patent/BE516770A/fr unknown
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1180334B (de) * | 1955-08-02 | 1964-10-29 | Coal Industry Patents Ltd | Abbaueinrichtung fuer flach gelagerte Floeze geringer Maechtigkeit |
| DE1174726B (de) * | 1957-07-02 | 1964-07-30 | Dipl Berging Albrecht Graefer | Zweispindelige Grosslochbohrmaschine |
| DE1758851B1 (de) * | 1968-08-20 | 1971-09-23 | Bergwerksverband Gmbh | Hydromechanische Bohreinrichtung zur Herstellung floezgaengiger Zielbohrungen |
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