The fullface rock boring machine works
inefficiently in extremely complex geology. To solve the problem, based on the
consideration of extremely complex geological environment conditions and
technical characteristics of fullface rock boring
machine, the following work were done: First, technical indexes of fullface rock boring machine in extremely complex geology are
formulated, and the fullface rock boring machine for
extremely complex geology is developed, and the expanding excavation technology
for variable crosssection convergence stratum is
proposed. Second, in view of the geological characteristics of broken
surrounding rock, the cooperative operation methods of key parameter control,
small tube chemical grouting, pipe shed grouting and small pilot tunnel
excavation technology are established, which are applied to solve the broken
surrounding rock stratum; Third, aiming at the problem of low efficiency of
rock slag accumulation excavation, the combined slag removal mode of mechanical
slag removal and belt conveyor slag removal is established; Finally, the
extremely complex geological excavation in Gaoligong Mountain verified the
research results. The results show that: (1) The full face Hard Rock Roadheader
has high footage speed and high equipment integrity rate in class II and III
surrounding rock conditions. (2) The broken stratum mainly composed of class IV
and V surrounding rock has good adaptability, and the maximum monthly footage
reaches 438 m and the average monthly footage is 412 m under the general
condition of tool wear, indicating that it has good geological adaptability.
QIN Yinping
,
SUN Zhenchuan
,
ZHANG Bing
,
ZHAO Hailei
. Development of TBM in Extremely Complex Geology and
Key Technology of Efficient Construction[J]. Tunnel Construction, 2020
, 40(S2)
: 271
-279
.
DOI: 10.3973/j.issn.2096-4498.2020.S2.035
