DOI: 10.11799/ce201805008
Research on reasonable width of coal pillar in fully mechanized top-coal caving island face
ZHANG Li-ming
Abstract：In order to determine the reasonable pillar width of 3603 fully mechanized caving island of Wuyang Coal Mine and ensure the roadway stability during mining, the pillar size is calculated by empirical formula, auxiliary area theory, elastic-plastic balance theory and Wilson's formula, and the formulas are integrated. According to the calculation results, the width of the pillars is in the range of 20~30m. The three-dimensional finite difference software FLAC3Dis used to simulate the vertical stress, plastic zone deformation characteristics, roadway vertical displacement map and roadway horizontal displacement map under different coal pillar width conditions. The simulation results show that the reasonable coal pillar width for the working face is 25m.
Keywords：fully mechanized top-coal caving island facecoal pillar widththeoretical calculationnumerical simulation
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 29-33 )