Shallow Buried Coal Seam Mining Coordinated Control Water Fractured Zone Height Model Research

With the development of the mining area of shaanxi, thin bedrock, shallow buried coalseam mining under the condition of Sarah WuSu group of ecological containing waterprotection has become the key issue in the mining area water resources and ecologicalenvironment protection. Shallow buried coal seam mining under the condition of thin bedrockstrata damage rule has its particularity, in order to form the instability of key strata fractureand structure of longitudinal cut crack failure for the characteristics, theory and productionpractice has proved that this kind of crack damage to a certain extent by the thickness of coalseam mining, roof control method and the influence of the mining method. In northernshaanxi yulin-shenmu coal mine areas of the topography and geological condition, coal seamoccurrence condition, Sarah WuSu aquifer distribution and the present situation of the surfacecrack damage as the background, to Wang Gugou coal mine1501,1502as the research objectof fully mechanized working face, the band filling mining method to coordinate and a methodof mining overall height mining damage evolution law of banding analysis application fillingmining method to coordinate control of water flowing fractured zone height of overburdenrock condition and effect.In the study of coal seam buried depth, thickness and strip filling mining method, miningcoordinate mining of overburden rock failure pattern, water fractured zone height influence,on the basis of establishing the height of overburden rock lead water crack bring controlmodel, in order to improve the stability of the strata structure provides the theory basis;Combined with the overburden rock lead water crack with development height control model,indoor physical similar material simulation experiment method, combining with the UDECand FLAC3Dnumerical simulation method, simulations in the stripe coordinate mining andfilling the stripe filling mining under the condition of two different mining methods, keystratum structure stability and strata failure pattern, stress and strain distribution of theoverburden strata, the strata damage evolution process, formation mechanism, the development process of the water transmitting fissure zone and influence on water-resistinglayer, reveals the structure of the key stratum instability is cut down formation fracturesurface subsidence damage, Sarah WuSu group of the controlling factor of ecological aquiferdestruction, in the same geological and mining conditions, the application of strip packingcoordinate mining method can effectively improve the key stratum structure stability, controlthe growth of overburden rock lead water crack bring height.The research results show that under the condition of shallow buried coal seam ofshaanxi, application of longwall fully-mechanized face strip filling mining method tocoordinate, can effectively control the strata water and height of fractured zone is to protectthe northern shaanxi Sarah WuSu group mining area ecological aquifer of economic andeffective water coal mining.