Deformation characteristic of key stratum overburden by raw waste backfilling with fully-mechanized coal minning technology
ZHANG Ji-xiong
LI Jian
AN Tai-long
HUANG Yan-li
Abstract：Based on the analysis of the deformation characteristic of overlying stratum in fully-mechanized coal minning technology and backfilling with fully-mechanized coal minning technology,the mechanical model of key stratum in the raw waste backfilling with fully-mechanized coal minning technology was founded,and the bending deformation characters of the key stratum was analyzed by the theory of beam on elastic foundation.The maximum deflection and intensity of the key stratum,and the relation between lithological parameters and elastic foundation factors of the stratum below the key stratum was presented.According to the field geological conditions of a certain coal mine,the maximum deflection of the key stratum in backfilling with fully-mechanized coal minning face was calculated,and the relation between the deflection of key stratum and the elastic modulus of fillings was researched through changing the characters of the fillings.The research results provide that the bending deformation of the key stratum can be reduced by increasing the elastic modulus of fillings,and raw waste backfilling can restrict the deformation of the key stratum and the subsidence of surface can be controlled by raw waste backfilling.
Keywords：wastebackfilling with fully-mechanized coal minning technologykey stratumdeformationelastic foundation
Publication Date：2010-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 357-362 )