Study On Numerical Simulation Of Zonal Disintegration Of Surrounding Rock In Deep Roadway

In recent years, with the continuous deepening of the sustainable development of underground engineering and deep underground rock mechanics characteristics, the endemic characteristics in deep underground engineering of rock failure phenomenon is increasingly being attention to scholars and experts from all over the world. Under high stress, high temperature and large disturbance, the failure of deep rock mass shows a series of different forms, such as the zonal disintegration phenomenon of rock and so on. Based on the complexity of the meso structure of rock, these phenomena are difficult to describe quantitatively at present. In this paper a number of scholars in the deep rock mass of zonal disintegration phenomenon research results, on the basis of existing research, using the FLAC3 D numerical simulation software in FISH language with C + + language development program, on the rock of the zonal disintegration phenomenon numerical simulation. The research work and related results are as follows:(1) Based on the maximum tensile stress criterion and the strain energy density theory, using C + + and fish language of rock zonal disintegration phenomenon simulation program development, better completed the zonal disintegration phenomenon in the realization of numerical simulation software.(2) By means of calculating program, combined with the others of the field model test results, the horseshoe shaped, circular, Shing Mun tunnel shape of roadway surrounding rock failure modes were simulated, and the rupture zone and non ruptured zone width and number and the site model test results have good consistency, and to verify the correlation between district destruction of the scope and the shape of the hole and chamber size.(3) The effect of initial loading, unloading rate of surrounding rock,and the factors of the rock shear expansion angle on the zonal disintegration is analyzed. Prove that the initial maximum principal stress parallel in axial direction of the tunnel rock in the radial tensile strain is zonal disintegration phenomenon generated an important condition, and directly get rupture zone of the surrounding rock and the number and the position of unloading the correlation between charge rate,and rock shear dilatancy angle for the partition rupture phenomenon had no significant effect.