Study Of Mechanism And Control Technology Of Floor Heave Under High Stress In Deep Roadway

With the increase of mining depth,the problem of floor heave is becoming increasingly prominent in deep roadway.It is the key to ensure the supply of Chinese coal resources and production safety that solving the problem of floor heave under high stress in deep roadway.In this paper,based on the background of floor heave in travelling roadway at Xieyi Coal Mine,combined with theoretical analysis and calculation,similar simulation experiment,numerical simulation and so on,the mechanism and control method of floor heave in deep high-stress roadway are studied in detail.A mechanical model of the deep lining high-stress roadway is established.The main factors that affect floor heave are derived through formula derivation and theoretical analysis,and floor heave causes of the studied roadway are analyzed with the engineering practice.Through a profound analysis of the similar simulation experiment,the law of surrounding rock stress changes and deformation laws of surrounding rock in the process of the bottom rock are summarized.The numerical simulation software is used to calculate and analyze the roadway,and the stress field and displacement field of the roadway surrounding rock are obtained.The numerical simulation and the phenomena of similar simulation experiment complement each other.Combining with the research results,the "floor-sides-roof" closed-loop relationship was proposed,and the new supporting ideas of "coupling support by trinity" were put forward,and the main measures and key technologies were put forward for deep-high stress roadway floor control.From the results of long-term surrounding rock deformation monitoring,the bottom rock mass control achieved good results and maintained the long-term stability of the roadway by the new support method,which is similar to the deep high-stress roadway in the future.Solve problems and provide reference.