Study on the Failure Characteristics of Coal Seam Floor in Xinglongzhuang Coal Mine
Abstract：Taking the condition of fully - mechanized working face in Xinglongzhuang coal mine as background, using mutual authenti- cation method of numerical simulation and live ultrasound imaging test, a comprehensive comparative study on the failure characteristics of coal seem floor under the mining is made. The numerical simulation indicats that the vertical stress is ＂saddle - shaped＂ distribution and the shear stress is roughly ＂butterfly - shaped＂ distribution in the workface. Field measurement studies show that the fracture de- velopment is obvious within the 16 m range under the seam floor of 10302 mechanized caving face, but the fracture development is rela- tively less exceed the range of 16 m. The depth of defoimation failure of coal seam floor is 16 m by the comprehensive analysis, and the results provide a reference for safety mining and mine water disaster control of Xinglongzhuang coal mine under the same condition.
Keywords：numerical simulationultrasonic imagingvertical stressshear stressfailure characteristics
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 42-44,51 )