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Influence of Key Parameters of a TBM Gauge Disc Cutter on Rock-Breaking Efficiency
(1 School of Mining Engineering, Luliang University, Luliang 033000; 2 College of Mechanical and Electrical Engineering, Central South University, Changsha 410083; 3 Hunan Huayin Energy Technology Co. Ltd., Changsha 410001)
Abstract Rock-breaking efficiency is a key indicator for measuring the performance of a disc cutter. In this paper, a rock-breaking simulation model of the gauge disc cutter is established based on the discrete element method, and rock-breaking tests of the gauge disc cutter are performed through the multi-factor orthogonal design method. Meanwhile, by taking rock-breaking efficiency as the evaluation indicator for rock-breaking performance of the gauge disc cutter, it studies the effects of the angle of the cutter blade, width of the blade tip, installation angle, and transition radius of the cutterhead on rock-breaking efficiency, as well as the effects of each of those factors on marble breaking and concrete breaking respectively. It is thought that the effects of the installation angle on rock-breaking efficiency are significant, less so for the transition radius of the cutterhead and angle of the cutter blade, and minimal for the width of cutter blade. The effects of each factor on rock-breaking efficiency are different for different rock types. Effects of the installation angle and transition radius on marble- and concrete-breaking efficiency are the same, while the effects of the angle and width of the blade tip are opposite of each other. Experiments show that rock-breaking efficiency increases by 80% when the installation angle is adjusted from 8° to 4°, verifying the rule that the effects of the installation angle of the gauge disc cutter are significant on rock-breaking efficiency.
Abstract：
Rock-breaking efficiency is a key indicator for measuring the performance of a disc cutter. In this paper, a rock-breaking simulation model of the gauge disc cutter is established based on the discrete element method, and rock-breaking tests of the gauge disc cutter are performed through the multi-factor orthogonal design method. Meanwhile, by taking rock-breaking efficiency as the evaluation indicator for rock-breaking performance of the gauge disc cutter, it studies the effects of the angle of the cutter blade, width of the blade tip, installation angle, and transition radius of the cutterhead on rock-breaking efficiency, as well as the effects of each of those factors on marble breaking and concrete breaking respectively. It is thought that the effects of the installation angle on rock-breaking efficiency are significant, less so for the transition radius of the cutterhead and angle of the cutter blade, and minimal for the width of cutter blade. The effects of each factor on rock-breaking efficiency are different for different rock types. Effects of the installation angle and transition radius on marble- and concrete-breaking efficiency are the same, while the effects of the angle and width of the blade tip are opposite of each other. Experiments show that rock-breaking efficiency increases by 80% when the installation angle is adjusted from 8° to 4°, verifying the rule that the effects of the installation angle of the gauge disc cutter are significant on rock-breaking efficiency.
WU Yuan-1,
XIA Yi-Min-2,
GUO Jin-Cheng-3 etc
.Influence of Key Parameters of a TBM Gauge Disc Cutter on Rock-Breaking Efficiency[J] MODERN TUNNELLING TECHNOLOGY, 2015,V52(1): 119-126
2015, Vol. 52 