Development for prediction system of TBM tunnel face ahead using probe drilling equipment and drilled hole imaging equipment

Ki-Seog Kim; Jong-Hoon Kim; Lae-Chul Jeong; In-Mo Lee; Gye-Chun Cho

doi:10.9711/KTAJ.2015.17.3.393

All Issue

2015 Vol.17, Issue 3 Preview Page Next Page

Development for prediction system of TBM tunnel face ahead using probe drilling equipment and drilled hole imaging equipment 선진시추장비와 시추공벽 영상화 장비를 이용한 TBM 전방 지반평가시스템 개발

31 May 2015. pp. 393-401

PDF XML

Abstract

In the construction of a TBM tunnel, it is very important to acquire accurate information of the excavated rock mass for an efficient and safe work. In this study, we developed the prediction system of TBM tunnel face ahead using probe drilling equipment and drilled hole imaging equipment to predict rock mass conditions of the tunnel face ahead. The prediction system consists of the probe drilling equipment, drilled hole imaging equipment and analysis software. The probe drilling equipment has been developed to be applicable to both non-coring and coring. Also the probe drilling equipment can obtain the drilling parameters such as feed pressure, torque pressure, rotation speed, drilling speed and so on. The drilling index is converted to the drilling index RMR through the correlation between a drilling index and core RMR. The developed system verification was carried out through a slope and tunnel field application. From the field application result, the non-coring is four times faster than a coring and the drilling index RMR and core RMR are similar in the distribution range. This system is expected to predict the rock mass conditions of the TBM tunnel face ahead very quickly and efficiently.

Keywords

Prediction system

Probe drilling equipment

Drilled hole imaging equipment

Drilling parameter

Drilling index RMR

TBM 터널을 건설하는 동안 효율적이고 안전한 작업을 위하여 굴착 암반의 정확한 정보를 획득하는 것은 매우 중요하다. 이 연구에서는 터널 막장 전방의 암반 상태를 예측하기 위하여 선진시추장비와 시추공벽 영상화 장비를 이용한 TBM 전방 지반평가시스템을 개발하였다. TBM 전방 지반평가시스템은 선진시추장비와 시추공벽 영상화 장비, 분석 소프트웨어로 구성된다. 선진시추장비는 논코어링과 코어링 방법이 모두 적용 가능하도록 개발되었다. 또한 굴진 시 획득되는 피드압, 회전압, 회전수, 굴진속도 등의 천공영향변수를 획득할 수 있다. 천공지수는 코어RMR과의 상관성분석을 통해 천공지수RMR로 환산된다. 개발된 시스템은 비탈면, 터널 현장에서 현장적용을 진행하였다. 현장 적용 결과 논코어링 방법은 코어링 방법에 비해 4배가량 빠른 굴진이 가능한 것으로 확인되었고, 천공지수RMR과 코어RMR은 유사한 분포를 나타내었다. TBM 전방 지반평가시스템은 신속한 지반예측이 가능하므로 공기지연을 최소화할 수 있는 막장 전방 예측 기술로의 활용이 기대된다.

키워드

지반평가시스템

선진시추장비

시추공벽 영상화 장비

천공영향변수

천공지수RMR

References

1.Kahraman, S., Balci, C., Yazici, S., Bilgi, N. (2000), “Prediction of the penetration rate of rotary blast hole drills using a new drillability index”, International Journal of Rock Mechanics and Mining Science, Vol. 37, pp. 729-743.

2.Kim, K.Y., Kim, C.Y., Kim, K.S., Yim, S.B., Seo, K.W. (2009), “Prediction of geological condition ahead of tunnel face using hydraulic drilling data”, Journal of Engineering Geology, Vol. 19, No. 4, pp. 483-492.

3.Kim, K.Y., Kim, C.Y., Kim, K.S., Yoon, H.K. (2008), “A study on drilling parameters using rock specimen drilling test”, KSCE Annual Conference and Civil EXPO 2008, pp. 4294-4297.

4.Teale, R. (1965), “The concept of specific energy in rock drilling”, Int. J. Rock Mech. Mining Sci, Vol. 2, pp. 57-73.

5.Thuro, K. (1997), “Drillability prediction-geological influences in hard rock drill and blast tunnelling”, Geol Rundsch, Vol. 86, 426-438.

6.Yamamoto, T., Shirasagi, S., Yamamoto, S., Mito, Y., Aoki, K. (2003), “Evaluation of the geological condition ahead of the tunnel face by geostatistical techniques using TBM driving data”, Tunneling and Underground Space Technology, Vo. 18, pp. 213-221.

Information

Publisher :Korean Tunneling and Underground Space Association
Publisher(Ko) :한국터널지하공간학회
Journal Title :Journal of Korean Tunnelling and Underground Space Association
Journal Title(Ko) :한국터널지하공간학회 논문집
Volume : 17
No :3
Pages :393-401
Received Date : 2015-05-11
Revised Date : 2015-05-19
Accepted Date : 2015-05-22
DOI :https://doi.org/10.9711/KTAJ.2015.17.3.393

Journal of Korean Tunnelling and Underground Space Association ISSN:2233-8292(Print) 2287-4747(Online) 한국터널지하공간학회 논문집

All Issue