• Title/Summary/Keyword: 와이어쏘

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Study on a Wire Saw Rock Cutting Model for Tunnel Excavation and Cutting Performance Improvement (터널굴착용 와이어쏘 암반절삭 모델 구축 및 절삭성능 향상 연구)

  • Lee, Jin-Ho;Ahn, Sung-Kwon;Lee, Kyoung-Chan;Bang, Choon-Seok;Sagong, Myung
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.39 no.10
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    • pp.1069-1077
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    • 2015

  • In tunnel excavation using blast, the wire saw rock cutting method generates a discontinuity perimeter around the center cut, and thus prevents blast vibration propagation to reduce vibration and noise. Therefore, the method is expected to be easy to use and economical compared with other methods. In this paper, the cutting mechanism of wire saw in tunnel excavation is investigated. A model describing the changes in cutting depth and wire saw shape inside a rock during cutting is established and validated for this purpose. Through a simulation using the model, the important characteristics of wire saw cut are investigated, and the influences of cutting conditions, such as wire saw tension, wire saw speed, feed speed, depth, and diameter of boring, on cutting performance are also examined. A method to improve the cutting performance is proposed based on the results.

  • https://doi.org/10.3795/KSME-A.2015.39.10.1069 인용 PDF KSCI

A Study on the Quarrying System by Two-face Rock Blasting and Diamond Wire-saw (양면발파법 및 다이아몬드 와이어쏘를 이용한 채석 시스템 연구)

  • 홍기표;류창하;선우춘;최병희;한공창
    • Explosives and Blasting
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    • v.18 no.3
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    • pp.49-58
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    • 2000

  • 본 논문은 양면발파에 의한 채석기술에서 주로 양면발파 장약패턴 및 다이아몬드 와이어쏘절삭기술에 관한 내용을 중심으로, 현재 각 석재광산에서 시행하고 있는 채석기술과 연구소 에서 시행한 현장 시험발파 결과를 기술한 것이다. 첫째, DA석재광산에서는 제트버너를 이용하여 자유면을 형성하고, 일면발파법과 양면발파법의 작업시간을 비교한 결과 양면 발파할 때에 37%이상의 작업시간 절약효과가 있었으며, 인원은 36%이상의 감소효과가 있었다.둘째, DH석재광산에서는 다이아몬드 와이어쏘를 이용하여 자유면을 형성하고 양면발파 작 업시간과 타 광산에서 일반적으로 사용하고 있는 제트버너에 의한 양면발파 작업시간을 비교하였을 때에 21%이상의 절감효과가 있었고, 작업인원도 21%이상의 감소효과가 있었다. 다이아몬드 와이어쏘를 이용하여 양측면에 자유면을 형성하고 양면 발파하는 채석기술은 소음 및 분진에 의한 환경공해를 방지할 수 있었으며, 작업공정 및 경제성 면에서도 매우 유 리하나 실패시 다른 채석기술에 비해 모암의 손상으로 인한 경제적 손실이 커질 수 있다는 단점도 있으므로 정밀한 발파설계 및 기술이 필요하다.

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An Experimental Verification on the Development of an Innovative Diamond Wire Saw Cutting Technology (새로운 다이아몬드 와이어 쏘 절단 기술 개발에 관한 실험적 검증)

  • Park, Jong Hyup;Chu, Baeksuk
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.17 no.6
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    • pp.83-90
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    • 2018

  • This paper introduces a innovative diamond wire saw cutting technology and its experimental verification that can be utilized for cutting heavy structures. While conventional diamond wire saw cutting technologies such as water cooled cutting method and dry cutting method cause severe environmental problems due to generating massive concrete sludge or dust scattering, the proposed method can eliminate those problems considerably. Through extensive experiments using heavy structure test bed and real bridge pier structure, comprehensive analysis and comparative evaluation about various cutting methods were performed. As a result, the innovative diamond wire saw cutting method could achieve a similar cutting and cooling performance to the water cooled cutting method without generating concrete sludge and it showed an improved cutting and cooling performance to the dry cutting method without dust scattering. Consequently it is confirmed that the suggested cutting technology can be a promising environment-friendly alternative in the field of heavy structure dismantling.

  • https://doi.org/10.14775/ksmpe.2018.17.6.083 인용 PDF KSCI

A Comparison of Ground Vibration in Center Cut Blasting using Artificial Joints (인공절리를 이용한 심발 발파에서의 지반진동 비교)

  • Park, Hoon;Suk, Chul-Gi;Noh, You-Song
    • Explosives and Blasting
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    • v.36 no.4
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    • pp.16-25
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    • 2018

  • In order to reduce ground vibration during tunnel excavation, a free surface blasting method has been applied in which a partial free surface is formed on the excavation surface and controlled blasting is performed. In this study, the ground vibration reduction due to artificial joints was evaluated by forming artificial joints on center cut using diamond wire saw and comparing the ground vibration caused by center cut blasting. As a result of comparison, ground vibration was reduced by artificial joints center cut blasting more than normal center cut blasting, and the ground vibration reduction effect of horizontal artificial joints center cut blasting was evaluated more than that of vertical artificial joint center cut blasting.

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