Simulation Study On Influence Of Mining Sequence On Fault Activation And Water Inrush In Stope

On the basis of theoretical analysis,this paper analyzes the mechanism and law of fault activation water inrush under the conditions of different mining sequence with fault,analyzes the interaction between the failure of the working face plastic zone and the floor and fault of the working face,and scientifically combines the prevention and treatment of the mine water damage.The safe and efficient exploitation of coal resources is of great practical significance.In this paper,based on the basic fault theory,physical detection technology and FLAC3D numerical simulation,the stress of the bottom plate,the failure of the plastic zone and the characteristics of the seepage are carried out in the sequence of the section mining,the order of the mining in the fault,the sequence of the mining on the fault,the sequence of the mining in the coal seam and the sequence of the forward backward mining.The displacement of the top and bottom slate and the change of shear stress in the fault fracture zone are mainly studied.Starting from the basic characteristics of the fault,the basic mechanical properties of faults based on the mechanical model of fault analysis,the mechanical mechanism of fault activation,drawn from the theoretical differences in hydraulic conductivity fault itself,on the development mechanism of mining pressure under the influence of floor strata stress,failure zone,and the confined water pressure expansion the role of faults,the water wedge effect and immersion disintegration described basic mechanism of water inrush through fault.Under the condition of the same geological conditions and the different mining order,the stress change,the plastic failure,the seepage characteristics and the displacement of the top and floor,the variation of the shear stress in the broken broken zone,and the research of the mining Shun under the condition of the same geological conditions and the different mining sequence are established under the condition of the same geological conditions.The law of water inrush from the fault under the influence of orderAccording to the 31515 working face of the specific hydrogeological condition and fault condition,using PROTEM series of transient electromagnetic detection instrument,the floor of 31515 working face of rich water,through the interpretation of observational data,get 31515 working face floor water resistivity section,and divides the bottom ash water Xu anomaly area.To verify the abnormal area of the floor of 31515 working face,combined with the results of field geophysical prospecting and numerical simulation,and considering the specific hydrogeological information of the working face,a series of targeted water control measures are put forward on the 31515 working face,including the setting of the boundary coal column and the hydrophobic Depressurization in the roadway.