Research On Bolt-net-tight Wire Support Of Gateway With High Geo-stress Sort Coal Seam

The deformation and displacement of the soft rock tunnel has an important influence on the stability of the whole structure .It is a vital for us to calculate and stimulate deliciously the deformation conduct of the rock tunnel to choose the time and program of the standing. The softening property of the dilatancy during the damage has a vital effect on the displacement of the tunnel. In this thesis, based on a lot of measurements ,on-the-spot investigation, the engineering geological character is soft road way are summarized : fractured surrounding rock-mass; high strength of rock and low strength of rock-mass; high geo-stress and low vertical geo-stress; serious heaving of floor rock-mass, serious heaving of flank side of roadway, fractured roof of roadway. this paper analysis factions of difference roadway section shape,difference vertical stress and difference flank stress by taking use of the theory of rock roadway and RFPA program this paper prose of some suggestion aiming to Danyan second mine to exist problems of support form and support technology. Meanwhile this paper prose brace support form to serious heavy floor rock mass and produce certain direction of practice of Dayan mine.