JPS6419300A - Blasting for underground excavation - Google Patents

Blasting for underground excavation

Info

Publication number
JPS6419300A
JPS6419300A JP17359587A JP17359587A JPS6419300A JP S6419300 A JPS6419300 A JP S6419300A JP 17359587 A JP17359587 A JP 17359587A JP 17359587 A JP17359587 A JP 17359587A JP S6419300 A JPS6419300 A JP S6419300A
Authority
JP
Japan
Prior art keywords
peripheral holes
blasting
holes
center cut
mine
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.)
Pending
Application number
JP17359587A
Other languages
Japanese (ja)
Inventor
Yuzo Koga
Ichiro Yano
Katsumi Ishida
Yoshiharu Tanaka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ISHIDA DOBOKU KK
Shimizu Construction Co Ltd
Shimizu Corp
Original Assignee
ISHIDA DOBOKU KK
Shimizu Construction Co Ltd
Shimizu Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ISHIDA DOBOKU KK, Shimizu Construction Co Ltd, Shimizu Corp filed Critical ISHIDA DOBOKU KK
Priority to JP17359587A priority Critical patent/JPS6419300A/en
Publication of JPS6419300A publication Critical patent/JPS6419300A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To employ an NATM for a soft rock, a crush zone or other similar geological features by boring a number of peripheral holes along a set surface for the formation of a cavity to carry out a center cut and a side blasting without loading a powder into peripheral holes. CONSTITUTION: A center cut hole A and a side hole B are bored parallel with the direction of excavation while a number of peripheral holes D are bored along the set surface C for the formation of a cavity. The center cut hole A and the side hole B are loaded with a powder and with the peripheral holes D left vacant, a blasting is carried out in the order of the center cut hole A and the side hole B. Since an impact wave by the blasting is received by the vacant parts of the peripheral holes D while the impact energy thereof runs to adjacent holes mechanically weak, a cracking is caused between the adjacent holes D, which enables prevention of adverse effect on a mine. The surrounding area is taken off by a giant breaker along the cracking of the peripheral holes D and a primary shotcrete is applied early to inhibit early slackening of the mine and then, a rock bolt is struck in thereby stabilizing the mine.
JP17359587A 1987-07-11 1987-07-11 Blasting for underground excavation Pending JPS6419300A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17359587A JPS6419300A (en) 1987-07-11 1987-07-11 Blasting for underground excavation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17359587A JPS6419300A (en) 1987-07-11 1987-07-11 Blasting for underground excavation

Publications (1)

Publication Number Publication Date
JPS6419300A true JPS6419300A (en) 1989-01-23

Family

ID=15963510

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17359587A Pending JPS6419300A (en) 1987-07-11 1987-07-11 Blasting for underground excavation

Country Status (1)

Country Link
JP (1) JPS6419300A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100787204B1 (en) * 2006-10-19 2007-12-21 이태노 Blasting pattern and blasting method using thereof tunnel and excavation work
CN103940309A (en) * 2014-03-26 2014-07-23 南京梅山冶金发展有限公司 Underground-blasting shaft forming method
CN107524124A (en) * 2017-09-18 2017-12-29 国家电网公司 A kind of Pumped Storage Plant Underground Powerhouse Rock Crane Rail Support position excavation construction method
CN112880500A (en) * 2021-01-29 2021-06-01 中交路桥北方工程有限公司 Wall protection smooth blasting method for tunnel weak surrounding rock based on double-layer peripheral hole arrangement

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5798800A (en) * 1980-12-10 1982-06-19 Miwa Engineering Kk Intermittent slit type blasting method
JPS59141693A (en) * 1983-02-01 1984-08-14 太平洋セメント株式会社 Tunnel drilling method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5798800A (en) * 1980-12-10 1982-06-19 Miwa Engineering Kk Intermittent slit type blasting method
JPS59141693A (en) * 1983-02-01 1984-08-14 太平洋セメント株式会社 Tunnel drilling method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100787204B1 (en) * 2006-10-19 2007-12-21 이태노 Blasting pattern and blasting method using thereof tunnel and excavation work
CN103940309A (en) * 2014-03-26 2014-07-23 南京梅山冶金发展有限公司 Underground-blasting shaft forming method
CN107524124A (en) * 2017-09-18 2017-12-29 国家电网公司 A kind of Pumped Storage Plant Underground Powerhouse Rock Crane Rail Support position excavation construction method
CN112880500A (en) * 2021-01-29 2021-06-01 中交路桥北方工程有限公司 Wall protection smooth blasting method for tunnel weak surrounding rock based on double-layer peripheral hole arrangement
CN112880500B (en) * 2021-01-29 2022-03-11 中交路桥北方工程有限公司 Wall protection smooth blasting method for tunnel weak surrounding rock based on double-layer peripheral hole arrangement

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