JPS6257791B2 - - Google Patents
Info
- Publication number
- JPS6257791B2 JPS6257791B2 JP8825480A JP8825480A JPS6257791B2 JP S6257791 B2 JPS6257791 B2 JP S6257791B2 JP 8825480 A JP8825480 A JP 8825480A JP 8825480 A JP8825480 A JP 8825480A JP S6257791 B2 JPS6257791 B2 JP S6257791B2
- Authority
- JP
- Japan
- Prior art keywords
- bit
- rock
- circular hole
- drilling
- hole
- 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
- 239000011435 rock Substances 0.000 claims description 27
- 238000005553 drilling Methods 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 7
- 239000000843 powder Substances 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 239000003721 gunpowder Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005422 blasting Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8825480A JPS5712793A (en) | 1980-06-27 | 1980-06-27 | Drilling of grooved hole |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8825480A JPS5712793A (en) | 1980-06-27 | 1980-06-27 | Drilling of grooved hole |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5712793A JPS5712793A (en) | 1982-01-22 |
JPS6257791B2 true JPS6257791B2 (no) | 1987-12-02 |
Family
ID=13937724
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8825480A Granted JPS5712793A (en) | 1980-06-27 | 1980-06-27 | Drilling of grooved hole |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5712793A (no) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6180883U (no) * | 1984-10-30 | 1986-05-29 |
-
1980
- 1980-06-27 JP JP8825480A patent/JPS5712793A/ja active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS5712793A (en) | 1982-01-22 |
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