To examine the influence of
tooth shape parameters, tooth spacing, and row spacing on the rock breaking
efficiency and rock damage zone under the teeth of the toothed roller cutter,
different tooth shapes of the toothed cutter are selected to conduct intrusion
rock breaking tests on Beishan granite with a size of 300 mm×300 mm×300 mm. The intrusion process,
intrusion force, rock breaking volume, rock breaking efficiency, and
characteristics of rock damage zone under the teeth are analyzed. The
experimental results reveal the following: (1) The rock breaking efficiency of
the selected test tooth shape with a diameter of 18 mm is the highest. (2) When
the tooth spacing and row spacing ranging from 35 to 40 mm can achieve the
highest rock breaking efficiency of the pick tooth intrusion. (3) The
fluorescence crack visualization method is employed to analyze the distribution
characteristics of rock cracks under teeth. The range of rock damage zone and
crack propagation mode under different tooth shape parameters are obtained, and
the crack characteristic analysis results are consistent with the results of
rock breaking efficiency obtained through intrusion force and rock breaking
specific energy analysis.
KANG Le, YIN Lijun, MA Yanan, GONG Qiuming, MA Hongsu
. Experimental Study on
Optimization of Pick Tooth Shape and Arrangement Parameters for Pick Tooth Inserted Cutter[J]. Tunnel Construction, 2024
, 44(S1)
: 448
-455
.
DOI: 10.3973/j.issn.2096-4498.2024.S1.048
