Study On Surface Movement Laws Caused By Mining Under Very Thick Loose Overburden

Regularity of surface movement and deformation in mining under thick soil layeris different from the non thick soil layer mining area, which main show is the violentof surface movement and deformation and expansion of severe.Firstly, this paper studis the principle of mining subsidence and analysis themeasured data under thick soil layer as the foundation,deeply discusses influencefactors that regularity of surface movement and deformation in mining under thick soillayer is different from the non thick soil layer mining area; base on the force conditionwhere surface movement and deformation in mining under thick soil layer,and revealthe mechanism where surface movement and deformation in mining under thick soillayer, furthermore study regularity of surface movement and deformation under thicksoil layer; base on field investigation,collect data and comprehensive analysisChensilou coal mine watch mobile observatory,which get displacement angle of strataby calculationand predicting parameters in Matlab way,and which provide referencefor parameters of surface movement and deformation in mining under thick soil layerin Chensilou Coal Mine;To Chensilou of coal mine geological and mining conditionsas the prototype, it established the Numerical simulation model,Numerical simulationof software FLAC^3Dwas adopted for the comparison and analysis of rules of rock andsurface movement under thick soil layer, and the relationship between mining height,thick soil layer thickness, mining depth, the ratio of mining depth and miningthickness,sizes of working field and the laws of surface movement in mining arestudied.The results can provide theoretical basis and scientific references for Chensiloumining area and similar mining area to predicting and controlling surface subsidenceand mining under the “three body”.