The Viscoelasticity Analysis Of The Roadway Within F₂ Fault Zone At Tao Yuan Mine

To solve the problem of the roadway's excavation in F₂ fault zone in Tao Yuan mine, the creep rule after excavation is analyzed wth the Burgers viscoelasticity model.This paper comprises the following 3 parts:(1)Based on the date of bore hole samples, the occurrence of F₂ fault are discovered; the clay mineral contents, physics mechanical properties and the hydrophysical properties are obtained by x-diffraction and rock mechanics test and soil test. The F₂ fault is classified to swelling soft rock.(2)According to the displacement contour and the stress contour at three time step, the creep rules of deformation vs time and stress vs time after the excavation are researched; the creep directions of the roadway in F₂ fault zone are concluded based on displacement vector; and the unequal creeps of roadway analyzed by setting the points of recording the displacement.(3) The deformation of roadway on the given supporting is analyzed. The effect of the sclerous layer to the creep deformation is researched by parameter changing...