JPS622112B2 - - Google Patents
Info
- Publication number
- JPS622112B2 JPS622112B2 JP18500480A JP18500480A JPS622112B2 JP S622112 B2 JPS622112 B2 JP S622112B2 JP 18500480 A JP18500480 A JP 18500480A JP 18500480 A JP18500480 A JP 18500480A JP S622112 B2 JPS622112 B2 JP S622112B2
- Authority
- JP
- Japan
- Prior art keywords
- excavation
- bit
- tool
- load
- control device
- 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
- 238000009412 basement excavation Methods 0.000 claims description 64
- 238000005553 drilling Methods 0.000 claims description 12
- 239000000725 suspension Substances 0.000 claims description 8
- 239000002689 soil Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18500480A JPS57112591A (en) | 1980-12-27 | 1980-12-27 | Automatic fall controller for excavating device of vertical hole excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18500480A JPS57112591A (en) | 1980-12-27 | 1980-12-27 | Automatic fall controller for excavating device of vertical hole excavator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57112591A JPS57112591A (en) | 1982-07-13 |
| JPS622112B2 true JPS622112B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1987-01-17 |
Family
ID=16163087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18500480A Granted JPS57112591A (en) | 1980-12-27 | 1980-12-27 | Automatic fall controller for excavating device of vertical hole excavator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57112591A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) |
-
1980
- 1980-12-27 JP JP18500480A patent/JPS57112591A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57112591A (en) | 1982-07-13 |