Title:
湧水圧測定装置および湧水圧測定方法
Document Type and Number:
Japanese Patent JP7385216
Kind Code:
B2
Abstract:
To provide a drilling device with an inrush water pressure measuring device allowing drilling to be quickly resumed after measuring inrush water pressure in front of a working face.SOLUTION: An inrush water pressure measuring device 1 is provided with a drilling rod 2, an annular outer bit 3 fixed on a tip of the drilling rod 2, an inner bit 4 detachably arranged in an inner hollow space of the outer bit 3, a packer device 5 insertable in the inner hollow space of the outer bit 3, and a pressure gauge 6 measuring pressure of inrush water captured from a tip of the packer device 5. The inner bit 4 is detachable out of the outer bit 3 from a rear part thereof, and the packer device 5 is provided with a water intake pipe 51, and a packer member 52 attached in an expandable manner on an outer periphery of a tip of the water intake pipe 51.SELECTED DRAWING: Figure 1
Inventors:
Yusuke Hiratsuka
Hajime Yamamoto
Kumamoto Sou
Kentaro Masuoka
Toshimitsu Kuga
Kentaro Okutsu
Hajime Yamamoto
Kumamoto Sou
Kentaro Masuoka
Toshimitsu Kuga
Kentaro Okutsu
Application Number:
JP2020044934A
Publication Date:
November 22, 2023
Filing Date:
March 16, 2020
Export Citation:
Assignee:
Taisei Corporation
Mining Industry Co., Ltd.
Mining Industry Co., Ltd.
International Classes:
E02D1/00
Domestic Patent References:
| JP2019044509A | ||||
| JP2018021315A | ||||
| JP2007070870A | ||||
| JP2001207771A |
Attorney, Agent or Firm:
Patent Attorney Corporation Isono International Patent and Trademark Office