Reseach on calculation and influencing factors of compressive bearing capacity of"multi-arch of pier column"filling body
Wang Yanjun
Wang Pengyu
Huang Pu
Qin Xueliang
Shi Xinshuai
Li Guangzhi
Abstract：A new idea of"multi-arch of pier column"filling supporting to treat old goaf was proposed based on the characteristics of old empty spaces.The feasibility of"multi-arch of pier column"filling supporting in old goaf was verified through numerical calculations u-sing FLAC.On this basis,a formula for calculating the bearing capacity of the"multi-arch of pier column"filling body under the critical layer fracture state of horizontal"O-X"was proposed.The calculation results show that the minimum compressive bearing capacity of the"multi-arch of pier column"depends on 12 factors such as the thickness of the key layer and the main roof thickness.By using the Morris screening method,the sensitivity of 8 factors to the minimum compressive bearing capacity of"multi-arch of pier column"was selected.The results showed that the thickness of the key layer,the thickness of the main roof,and the ultimate collapse step of the key layer played an important role in the minimum compressive bearing capacity of"multi-arch of pier column";the minimum compressive bearing capacity of the"multi-arch of pier column"is not significantly affected by the fracture angle of the"O-X"broken roof and the main roof fixing length.The construction mode of"multi-arch of pier column"filling body has laid a certain foundation for the filling body construction in the region.
Keywords："multi-arch of pier column"filling supportingnumerical simulationmechanics modelsensitivity analysis
Publication Date：2025-04-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 71-77,86 )