Title:
UNDERGROUND EXCAVATION AND DEVICE THEREFOR
Document Type and Number:
Japanese Patent JP3547093
Kind Code:
B2
Abstract:
PURPOSE: To reduce the permeation of the ejected water into the peripheral natural ground and suppress the disturbance of the peripheral natural ground.
CONSTITUTION: The top end part of a propulsion body 12 having an excavating machine body 14 arranged inside is pushed into a natural ground 40. Into a sealed space 41 formed between the natural ground 40 and a bulkhead 18, a compressed air is supplied through the compressed air feeding pipe 74, and a coal pit surface 42 is stabilized, and excavation is carried out, by ejecting the high pressure water 38 mixed with air to the natural ground 40 in the propulsion body 12, from an ejecting nozzle 32, revolving a scraping blade 88. Then, a discharged soil valve 71 in a soil discharging pipe 64 is opened to operate a vacuum pump connected with the soil discharging pipe 64, and the excavated soil and sand 130 are sucked, and a shielding valve 69 is closed, and the soil and sand 130 in the soil discharging pipe 64 is discharged.
Inventors:
Giichi Sato
Yoshiyasu Yoshikawa
Hideaki Suzuki
Takasuke Oi
Nozomi Kataoka
Yoshikazu Yamauchi
Yoshiyasu Yoshikawa
Hideaki Suzuki
Takasuke Oi
Nozomi Kataoka
Yoshikazu Yamauchi
Application Number:
JP15657394A
Publication Date:
July 28, 2004
Filing Date:
June 15, 1994
Export Citation:
Assignee:
Kyowa Exio Co., Ltd.
Fujita Co., Ltd.
Fujita Co., Ltd.
International Classes:
E21D9/06; E21D9/08; E21D9/12; E21D9/13; (IPC1-7): E21D9/08; E21D9/06; E21D9/13
Domestic Patent References:
| JP58026193A | ||||
| JP58033690A |
Attorney, Agent or Firm:
Yuichi Murakami
Okubo Misao
Okubo Misao