Simulation of Section Coal Pillar Size Reserved for Longwall Face of Steeply Inclined Coal Seam
WANG Lin
WANG Guanghong
DONG Jing
Abstract：A mechanical model was established by taking the section coal pillar reserved in B8 steep seam in Nanshan Coal Mine as the engineering background and the destabilization of coal pillars as the critical condition, the size of the section pillar of the coal seam with dip angle of 40° was calculated theoretically, and it was concluded that a 20 m-wide coal pillar should be reserved. A numerical model was established for verification, and the stress characteristics of coal pillars and the destabilization characteristics of rock stratum were respectively simulated in the conditions of coal pillar size of 5 m, 10 m, 15 m and 20 m. The simulation results showed that a coal pillar with a reasonable width from 15 to 20 m should be reserved.
Keywords：steeply inclined coal seamsection coal pillarlongwall facedestabilization of coal pillarcola pillar width
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 74-77 )