To realize onetime tunneling and forming as
well as rapid excavation of a quasirectangular fullface tunnel in the field of coal mine roadway in China, the cutting
mechanism of the tunnel boring machine is investigated for a quasirectangular tunnel with a width and height of 6 m and 4.2 m,
respectively. First, the characteristics of multiple tunnelforming technical schemes are analyzed to select a cutting
mechanism. The selected mechanism is realized by arranging triplearm cutterheads on the right and left and cutting drums on the top
and bottom of the machine. Second, the forming shape of the tunnel is designed
according to the actual demands of coal mine tunnels. Third, the structures of
the cutterhead and cutting drum are designed, and the cutting picks are
selected and arranged. Finally, threedimensional
models of the triplearm cutterheads and cutting drums
are constructed using SolidWorks, and modal and static analyses are then
performed using ANSYS. The following results are obtained. (1) The proposed
cutting mechanism can realize onetime tunneling and
the formation of a quasirectangular fullface tunnel. (2) This cutting mechanism meets the strength and
stiffness requirements of the tunnel without the occurrence of resonance
phenomenon. The application results demonstrate that the recommended cutting
mechanism has high tunneling efficiency and good application prospects for
constructing a quasirectangular tunnel for coal mine
roadway.
HE Enguang
,
REN Zhiqiang
,
ZHOU Peng
,
YE Long
. Design and Simulation Analysis of Cutting Mechanism of
QuasiRectangular FullFace
Tunnel Boring Machines for Coal Mine Roadway[J]. Tunnel Construction, 2023
, 43(5)
: 865
-873
.
DOI: 10.3973/j.issn.2096-4498.2023.05.014
