Open AccessAnalysis of surrounding rock anchoring effect under the condition of squeezed mountain
Author(s) -
Yan Ma,
Chao Su,
Heng Zhang
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/669/1/012028
Subject(s) - anchoring , geology , geotechnical engineering , lithology , tectonics , deformation (meteorology) , stratification (seeds) , rock mass classification , petrology , seismology , seed dormancy , oceanography , botany , germination , structural engineering , dormancy , engineering , biology
In the process of orogenesis, the geological conditions of vertical strata were formed due to the intense compressive tectonic movement, and lithologic stratification occurred in the rock mass of the plant along the horizontal plane and vertically upstream and downstream. The main powerhouse of a power station straddles two types of rock formations along the axis. Considering the lithological differences between the two ends, traditional support methods will inevitably fail to meet the requirements of safety and economy. In this paper, under the condition of systematic bolt support for the whole plant, prestressed anchor cables are added to the upstream and downstream side walls of the plant in the type III surrounding rock area to increase the stability, and the anchoring effect is analyzed and compared with the calculation of the burrow. The results show that the deformation around the cave in the surrounding rock areas of type II and III under unsupported conditions differs by 31.48%, and the depth of the plastic zone in the surrounding rock area of type III exceeds the anchoring depth of the bolt; After partition support, The horizontal displacements of typical cross-sections in the two types of surrounding rock areas have decreased by 8.66% and 17.11% respectively, the stress distribution is more uniform, the distribution range of the plastic zone in the downstream wall of the plant is significantly reduced, and the stability of the surrounding rock is guaranteed.