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Analysis of the Optimal Penetration of Disc Cutter in Rock Breaking Based on Characteristic Particle Size
(1. College of Civil Engineering, Henan University of Technology, Zhengzhou 450001; 2. Henan International Joint Laboratory of Modern Green Ecological Storage System, Zhengzhou 450001; 3. Beijing Urban Construction Design & Development Group Co.,Limited, Beijing 100000; 4. Key Laboratory of Urban Disaster Prevention and Mitigation of Ministry of Education, Beijing University of Technology, Beijing 100124)
Abstract Based on the mechanical rock breaking platform of Beijing University of Technology, the linear cutting test is performed with disc cutters on the composite rock mass composed of mudstone and green sandstone, to explore the relationship between the rock debris features and the penetration after rock breaking with disc cutters. During the test, six sets of different penetrations (1.0 mm, 3.0 mm, 5.0 mm, 7.0 mm, 9.0 mm and 11.0 mm) are set to collect the rock debris generated from rock breaking with the disc cutters at different penetrations. The Rosin-Rammler function is used to analyze the rock debris data, and the characteristic particle size theory is used to analyze the optimal penetration during rock breaking with the disc cutters. Furthermore, a method based on the characteristic particle size theory is proposed to determine the optimal penetration. Through comparative analysis, it was found that the optimal penetration obtained using the characteristic particle size theory is consistent with the optimal penetration obtained through specific energy, which verifies the effectiveness of the proposed method; and this method is more direct and convenient.
Abstract：
Based on the mechanical rock breaking platform of Beijing University of Technology, the linear cutting test is performed with disc cutters on the composite rock mass composed of mudstone and green sandstone, to explore the relationship between the rock debris features and the penetration after rock breaking with disc cutters. During the test, six sets of different penetrations (1.0 mm, 3.0 mm, 5.0 mm, 7.0 mm, 9.0 mm and 11.0 mm) are set to collect the rock debris generated from rock breaking with the disc cutters at different penetrations. The Rosin-Rammler function is used to analyze the rock debris data, and the characteristic particle size theory is used to analyze the optimal penetration during rock breaking with the disc cutters. Furthermore, a method based on the characteristic particle size theory is proposed to determine the optimal penetration. Through comparative analysis, it was found that the optimal penetration obtained using the characteristic particle size theory is consistent with the optimal penetration obtained through specific energy, which verifies the effectiveness of the proposed method; and this method is more direct and convenient.
ZHAI Shufang1,
2 DU Hongkun1 YUE Qichao1 WU Fan3 GONG Qiuming4
.Analysis of the Optimal Penetration of Disc Cutter in Rock Breaking Based on Characteristic Particle Size[J] MODERN TUNNELLING TECHNOLOGY, 2023,V60(4): 147-152
2023, Vol. 60 