Numerical Simulation Study of Easy-weathering Roadway Support in Deep Soft Rock Strata
LI Shugang
ZHANG Jinhai
CHENG Lianhua
LIN Haifei
LI Zhiliang
Abstract：To counter to the features of easy weathering of deep soft rock strata, the deformation and failure of the roadway surrounding rock and the difficult support of the roadway, the mechanism of roadway deformation and failure was analyzed with the method of theoretical analysis and numerical simulation. The analysis indicated that this kind of roadway was in a high strata stress environment, with low strength and weak bearing capacity of the surrounding rock, had the rheological property and was easy to weather, which often cause the roadway to be difficultly maintained. The control measures included the full-face support, timely enclosing the whole section, supporting the surrounding rock into a whole with pre-stressed high-strength bolts, improving the strength and bearing capacity of surrounding rock, effectively preventing rheological deformation, and timely guniting to enclose the weathered surrounding rock, using U-shaped steel to reinforce the support, and supporting the floor heave section with inverted arch. Using above support techniques can reduce the floor heave amount by 67. 1%, the roof convergence by 48. 4% and the deformation amount of two rib-sides by 52. 6%, the roadway destability was under effective control.
Keywords：deep soft rockeasy-weathering rockroadway supportnumerical simulation
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 1-4,8 )