The Study on the Verification of the Blasting Effect of Blast Stemming Material and Plug Device

Young-Hun Ko

doi:10.7474/TUS.2022.32.4.272

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2022 Vol.32, Issue 4 Preview Page

Original Article

The Study on the Verification of the Blasting Effect of Blast Stemming Material and Plug Device 발파전색재료 및 플러그 장치의 발파효과 검증 연구

31 August 2022. pp. 272-284

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Abstract

This study conducted tunnel blasting to evaluate the blasting effect of a shear thickening fluid-based blasting stemming material and a sealed plug device under development. STF single stemming and STF stemming materials were combined with plugs to a tunnel blasting to which the SAV-Cut method was applied, and the advanced rate and fragmentation of tunnel blasting muck pile were compared when sand stemming was used. Tunnel advanced rate was evaluated using a 3D laser scanner. When the STF stemming material and STF stemming material with the plug were compared to the sand stemming material, it increased by 5.7 and 5.36%, respectively. As a result of evaluation of the fragmentation of tunnel blasting muck pile, it was the best when the STF stemming material was applied, and it decreased by about 61% compared to the case of sand stemming blasting. However, no significant improvement in blasting effect was observed with the application of plug devices.

Keywords

Shear thickening fluid

Stemming material

Plug

Advance rate

Fragmentation

본 연구에서는 개발 중인 전단농화유체(shear thickening fluid) 기반의 발파전색재료와 밀폐 플러그 장치의 효과를 평가하기 위하여 터널발파를 수행하였다. SAV-Cut공법을 적용하고 있는 터널현장에 STF 단일전색 및 STF 전색재를 플러그와 결합하여 적용하였고, 기존 방식의 모래전색을 적용한 케이스와 굴진율 및 파쇄입도를 비교하였다. 터널 굴진율은 3차원 레이저 스캐너를 이용하여 평가하였다. STF 전색재료와 STF 전색재료에 플러그를 결합한 경우 모래전색 대비 각 5.7, 5.36% 정도 굴진율이 향상되는 것을 확인하였다. 파쇄입도의 경우 STF 전색재료를 적용하였을 경우 가장 좋게 나타났으며, 모래 전색 케이스와 비교하였을 때 약 61% 파쇄입도가 감소하였다. 그러나 플러그 장치적용에 따른 뚜렷한 발파효과 향상은 관찰되지 않았다.

키워드

전단농화유체

전색재료

플러그 장치

굴진율

파쇄입도

References

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Information

Publisher :Korean Society for Rock Mechanics and Rock Engineering
Publisher(Ko) :한국암반공학회
Journal Title :Tunnel and Underground Space
Journal Title(Ko) :터널과 지하공간
Volume : 32
No :4
Pages :272-284
Received Date : 2022-08-16
Revised Date : 2022-08-22
Accepted Date : 2022-08-23
DOI :https://doi.org/10.7474/TUS.2022.32.4.272

Tunnel and Underground Space ISSN:1225-1275(Print) 2287-1748(Online) 터널과 지하공간

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