| This paper aim at floor heave of the mine rock tunnel, the reasons and the styles of floor heave in deep mine rock tunnel were analyzed, based on these analysis, circumcircle theory" was promulgated. Mainly, according to the round hole stress concentration analysis theory in the elastic-plastic mechanics and the crossbeam stress destroys basic principle in the materials mechanics, not only the stress and the distortion of each part rock were accurately analyzed, moreover the more accurate analytic solution for "tottering circle" of tunnel surrounding rock was obtained. The mechanical model for the floor heave of stress type was established in accordance with the circumcircle theory" and the constitutive relationship of tunnel wall rock. The development range, depth and floor pressure analytic calculation formula of floor plastic zone were deduced. The distortion, the stress space and the displacement space of vertical wall arch tunnel, rectangle tunnel and roundness tunnel were simulated during digging and after digging through numerical simulation and analytical calculation, the exactitude of theory analysis was validated. Some control methods for floor heave in the deep mine soft rock tunnel were given based on the result of analytical calculation and numerical simulation. The production of research provide theoretical basis for the treatment of the floor heave.
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