Deep Mine Soft Rock Roadway Floor Heave Mechanism Analysis And Strengthening Governance Technology Research

The problem of dropsical roadway has been restricted at the end of the coal mine production safety. To meet the growing energy needs, the mission for a long time coal mining in the future was still very difficult in our country, And after a long-term large-scale mining,more favorable conditions for coal resources is nearly depleted, This means that the future of the mining work will be at highland stress and poor environment rock conditions . With the increase of mining depth,enhance the degree of mechanization and required increase in cross-section of roadway, Floor heave problem is more prominent.On the basis of research results about the causes of floor heave and control in China and outside countries, the thesis elaborated soft rock tunnel on the type of floor heave and influencing factors, had analyzed the mechanism of floor heave, A soft rock roadway floor heave mechanical model was set up, the relevant areas of plastic expression was Calculated, the depth of the development of plastic zone was calculated. Indoor experiment about typical roadway rock bottom in Gubei Mine was done, which provided the basis for floor heave analysis of surrounding rock stability and numerical simulation. thesis combined with the Gu North Mine in Huainan mining area under 11-2 Lane adhesive tape machine, Considering the factors such as the basic installation of equipment to load large and deformation demanding, FLAC-3D simulation was used. The prevention and control program using Undercover combination of bottom floor anchor bolt grouting add floor heave. Simulation results show that the program of roadway between two groups and both the roof and floor damage plastic was adopted, Shoulder angle and the damage plastic were more obvious. flastic roof and floor appeared gradually stabilized after yielding, Between two groups were in an unstable state and a gap between two groups of bad area, the scope of rock stress distribution was significantly narrowed, the tension zone, compression zone and the plastic zone were significantly narrow, Roadway deformation was significantly lower. A reasonable choice of bolt angle was to control the most obvious effect of floor heave. floor heave at the end of the rock before the convergence of control, Loose circle and governance processes had been reinforced by the power-site monitoring. The results show that the Basic floor met the design requirements, Basic force was at range of at Effective and had the security of reserves. Takeing the bolt,cable,etc. Bottom roadway foundation reinforcement can effectively improve the stress distribution of rock tunnel, Significantly reduced the displacement of roadway, Support structure enhance the carrying capacity , poundation to ensure the overall stability of the long-term bottom, and can effectively solve the soft rock roadway floor heave problem under complex conditions.Thesis research has been successfully applied at a number of soft rock roadways with floor heave problem in Gubei coal mine which provides an important reference value on the similar projects of floor heave at the end of treatment and has larger role in promoting for the mechanism of floor heave and the ways of improving the governance and development in the soft rock roadway.