Study On Groundwater Impact Of Residual Mobile Deformation Theory Over Ground Tendency Main Section

The study on theory over ground subsidence basin tendency main section,is one important part of mining subsidence.They have many factors affecting the residual mobile deformation,such as groundwater.During the tendency main section,reach on residual mobile deformation that impacted groundwater,at home and abroad don't have perfect theory.And,it doesn't have the specific definition of residual mobile deformation in our country.It's very few of the observed data.So,study on the impact of groundwater to residual mobile deformation theory over ground subsidence basin tendency main section,it has significance about theory and application value.Analysis of the regular of strata mobile and damage in tendency main section of old goaf,reach on residual mobile deformation theory over ground subsidence basin that impacted groundwater.The stable state of overburden in old goaf with groundwater intruded into,the strength of the rock reduce,so damages state of rock equilibrium,promotes to occur the residual mobile deformation;Analysis of the impact of groundwater,the state of residual mobile deformation in the tendency main section,explores the damage mechanism and mobile regular of coal seam that exploited.During the angle of coal steam is large,the force of overburden gravity along the rock tangent direction component is greater than normal direction,caving rock in direction of up the hill slip and roll to direction of down the hill,filling in direction of down the goaf hill,result in the goaf overburden take place inadequate,but the direction of up the hill caving fully,the space greatens.So that it focused on the direction of up the hill to residual mobile deformation in tendency main section.Though the impact of groundwater to residual mobile deformation in tendency main section,probability integral method was applied to build its residual movement and deformation prediction model,derivation computational formula of the fist and second residual mobile deformation,including residual subsidence,residual deformation,residual tilt,residual level movement and residual curvature.According to the impact of groundwater to residual mobile deformation over ground subsidence basin tendency main section that confirmed prediction model,making use of example to verify function correctness,adopt two methods that the observed data and FLAC^3D,common to compare theory deduce function correctness,and analysis of engineering application value of the prediction model.