Linear cutting tests on effect of confining stress on rock fragmentation
by TBM cutter
MA Hongsu1，GONG Qiuming2，WANG Ju1，ZHAO Xiaobao3，YIN Lijun2，MIAO Chongtong2，HE Guanwen2
(1. CNNC Key Laboratory on Geological Disposal of High-level Radioactive Waste，Beijing Research Institute of Uranium Geology，Beijing 100029；2. Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education，Beijing University of Technology，Beijing 100124，China；3. NJU-ECE，Institute for Underground and Geo-environment，
Nanjing University，Jiangsu 210093， China)
Abstract：In deep tunnel construction，TBM faces the rock stress problems induced by overburden or anisotropic stress，which had been under more and more attention. In this paper，full-scale cutting tests are presented to investigate the effect of different confining stresses，i.e. 0，5，10，and 15 MPa，on rock fragmentation of large intact granite sample with dimension of 1.0 m?1.0 m?0.6 m induced by TBM cutter. In these tests，the characteristics of force-time curves，normal forces，rolling forces，specific rock mass boreability index，chipping thickness and specific energy affected by confining stress were analyzed.
马洪素1，龚秋明2，王 驹1，赵晓豹3，殷丽君2，苗崇通2，何冠文2. 围压对TBM滚刀破岩影响规律的线性切割试验研究[J]. 岩石力学与工程学报, 2016, 35(2): 346-355.
MA Hongsu1，GONG Qiuming2，WANG Ju1，ZHAO Xiaobao3，YIN Lijun2，MIAO Chongtong2，HE Guanwen2. Linear cutting tests on effect of confining stress on rock fragmentation
by TBM cutter . , 2016, 35(2): 346-355.
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2016, Vol. 35 
