Research On The Development Mechanism Of Water Flowing Fractured Zone In Xuemiaotan Coal Mine

Yuyang Mine Area is in the southern margin of the Mu Us Desert.It is poor in water resources and the characteristic is shallow depth.The large-scale mining of coal seams will directly threaten the aquifer of the overlying strata and surface water systems,even threaten the weak environment in the area.Therefore,it is urgent to realize the water-preserved mining of the area.Aiming at this problem,the paper analyzes on the development mechanism of the water flowing fractured zone in Xuemiaotan Coal Mine.This paper takes the coal mining of Xuemiantan Coal Mine in Yuyang Mine Area as the object of research.Based on the analysis of the hydrogeology conditions and the occurrence status of coal seam in the first mining working face of Xuemiaotan Coal Mine,the main influence factors of the height of the water flowing fractured zone are the structure of overburden,the mining height and the mining size;Combining with the characteristics of continuous deformation zone,simplifying the calculation method of tensile deformation of overburden layer;Based on the JZ(ratio of bedrock thickness to overburden thickness)and JC(ratio of bedrock thickness to mining height)as the key parameters,the position of the main key stratum in the "three zones" is predicted and the stability of the segregated soil layer is analyzed,and the discriminating process of the height of the water flowing fractured zone under different working conditions is given;using the physical similarity simulation experiment,FLAC3 D numerical simulation software and theoretical calculation,the development height and mechanism of the water flowing fracture zone in the first mining working face is studied,and determining the development height of water flowing fractured zone is 167.21 m,namely coal seam depth.At the same time,based on the inhibition effect of the key stratum on the development height of the water flowing fracture zone,combining with the influence of mining height and mining size on the breaking of key stratum,analyzing,the development mechanism of the water flowing fractured zone is given.The research results can provide scientific basis for water-preserved mining in Yuyang Mine Area and the similar geological condition coal mine.It has great theoretical significance to realize exploitation and utilization rationally,and also the protection of ecological environment and water resources.