Road Under The Finite Element Analysis Of The Phosphate Mining

This paper simulated three different methods by the finite element software Ansys in case of mining under Jinyang route in Guizhou Kaiyang Phosphorite mine. It discussed mainly the effect on Jinyang route due to different mining methods in order to determine the most suitable plan which can ensure the safety of Jinyang route, and make phosphorite loss as low as possible.Considering the complicated geological conditions and the different type of rocks, Author gathered some representative rocks such as the superstratum rock of granite, the middle-level rock of phosphorite, and the substrate rock of gritstone, and obtained their mechanical parameters by test, which can be used as basic data for the numerical simulation. Because a rock sample is just a little part of rock mass, there is a big difference between the mechanical parameters of rock and the ones of rock mass.Obviously, the mechanical parameters of rock can not replace the ones of rock mass, so an engineering fuzzy discount method of rock parameters has been introduced in order to make numerical simulation being more precise and more valuable.The effect on Jinyang route due to mining spaces has been dicussed in three aspects: vertical displacement, horizontal displacement along the width, and horizontal displacement along the length, the sinkage of the route arose due to the vertical displacement, affect the level of the route;The horizontal displacement along the width is extension or condensation in the width orientation; the horizontaldisplacement's along the length is extension or condensation in the length orientation. The most suitable mining method has been chosen for the example on purpose to the effect on the displacements of the route.