Research On Mining With Gangue Backfill Of Steeply Inclined Coal Seam Group Under Buildings

This paper analyze the formation, lithologic characteristic, classification and chemicalcomposition of coal gangue，studie the physical and mechanical properties and filling effect of coalgangue；analyze the interaction mechanism of filling body and surrounding rock；study steeplyinclined coal seam overburden damage mechanism and characteristics，according to the roof stresscharacteristics of filling mining, establish roof movement mechanical model of steeply inclinedcoal seam filling mining with gangue，get the total deflection form of coal seam roof；analysiseinfluence factors of gangue filling mining control surface subsidence; through FLAC3D numericalsimulation, numerical simulate three mining plan, preliminary determine the optimalscheme;analysis inclined coal seam rock movement observation data of Zhaogezhuang mine,determine the reasonable predicting parameters, using a combination of probability integralmethod and Pearson III profile function method forecaste the mining scheme, base on theeconomic and technical comparison and analysis, determine the gangue strip-filling plan is optimalexploitation scheme...