Browse > Article
http://dx.doi.org/10.7474/TUS.2021.31.6.440

Investigation on Shape Effect of Rock Specimens to Uniaxial Compressive Strength and Modification of Performance Prediction Model of a Roadheader  

Kim, Mun-Gyu (Korea Institute of Industrial Technology)
Lee, Sang-Min (Korea Institute of Industrial Technology)
Cho, Jung-Woo (Korea Institute of Industrial Technology)
Choi, Sung-Hyun (Sandvik Suhjun)
Eom, Jun-Won (SK ecoplant)
Publication Information
Tunnel and Underground Space / v.31, no.6, 2021 , pp. 440-459 More about this Journal
Abstract
Roadheaders have begun to be adopted in Korean tunneling sites. The performance prediction models proposed by the manufacturer are used by Korean construction companies. The models use UCS (uniaxial compressive strength) value to predict the net cutting rate, but the rock specimens conducted for the uniaxial compression test have 1.0 of the diameter to length ratio. It has been reported that the specimen shape generally influences the rock strength. The previous references studying the shape effect were cited, and the UCS data of Korean rocks are also updated to analyze the shape effect on UCS. The cause of effect was discussed by previous theory. The change amount of UCS values of Korean rocks was estimated by the data, and the modified prediction model for NCR was finally suggested.
Keywords
Roadheader; Net cutting rate; Uniaxial compressive strength; Performance prediction; Shape effect; Modified prediction mode;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 ASTM, 1986, Standard Test Method for Unconfined Compressive Strength of Intact Rock Core Specimens, D 2928: 390-391.
2 ASTM, 1995, Standard Test Method for Unconfined Compressive Strength of Intact Rock Core Specimens, D2938-95
3 Bieniawski Z. and Bernede M., 1979, Suggested methods for determining the uniaxial compressive strength and deformability of rock materials: Part 1. Suggested method for determining deformability of rock materials in uniaxial compression, International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, Vol. 16(2), pp. 138-140.   DOI
4 Chang, S., 2015, A Consideration for Mechanical Rock Excavation Focusing on TBM and Roadheader, J. Korean Soc. Miner. Energy Resour. Eng. Vol.52(5), pp.531-548.   DOI
5 Copur, H., L. Ozdemir, and J. Rostami, 1998, Roadheader applications in mining and tunneling, Mining Engineering, Vol. 50, 38-42.
6 Du, K., Su, R., Tao, M., Yang, C., Momeni, A., and Wang, S., 2019, Specimen shape and cross-section effects on the mechanical properties of rocks under uniaxial compressive stress. Bulletin of Engineering Geology and the Environment. 78.
7 Hyundai E&C, 2019, 인천도시철도1호선 검단연장선 1공구 기본설계보고서.
8 Kim, Y., Jeong, H., Cho, J., Park, S., and Lee, Y., 2021, Roadheader excavation in urban tunnelling, Magazine of Korean Tunnelling and Underground Space Association, Vol. 23(1), pp. 61-80.
9 KSRM, 2005, Standard test method for uniaxial compressive strength of rock
10 Ocak, I. and Bilgin, N., 2010, Comparative studies on the performance of a roadheader, impact hammer and drilling and blasting method in the excavation of metro station tunnels in Istanbul, Tunnelling and Underground Space Technology, Vol. 25, 181-187.   DOI
11 KSRM, 2021, Roadheader excavation guide, CIR Co.
12 Rostami, J., 2011, Section 7.1 Rock Breakage, Mechanical, Mining Engineering Handbook, Society of Mining, Metallurgy, and Exploration Engineering Inc(SME).
13 Park, Y., Choi, S., Park, J., Lee, C., and Chang, S., 2013. Excavation Mechanism of Roadheader and Statistical Analysis of its Key Design Parameters Based on Database, Tunnel and underground space, Vol.23, No.5, pp.428-441.   DOI
14 Peinsitt, T., 2017, Rock testing standards for the evaluation of mechanical cuttability, Sandvik Mining and Construction G.m.b.H., Zeltweg, Austria
15 Restner, U. and Plinninger, R., 2015, Rock Mechanical Aspects of Roadheader Excavation. EUROCK 2015 & 64th Geomechanics ColloquiumAt: Salzburg, Austria, October 2015.
16 SK ecoplant, 2019, 동탄-인덕원 복선전철 1공구 및 월곶-판교 복선전철 8공구 건설공사 기본설계보고서.
17 Thuro, K. and Plinninger, R., 1998, Geological limits in roadheader excavation-Four case studies Proceedings of the 8th International IAEG Congress, pp.3545-3552
18 Thuro, K. and Plinninger, R., 1999, Roadheader excavation performance-geological and geotechnical influences, Proceedings of the 9th ISRM Congress, Paris, pp.1241-1244.
19 Thuro, K. and Plinninger, R., 2001, Scale effect in rock strength properties. Part 1: Unconfined compressive test and Brazilian test, Proceedings of EUROCK 2001 ISRM regional symposium, Espoo, Finland, June 3-7, 2001, pp169-174.