Study on Mechanism of Rib Spalling in Large Cutting Height Rise Mining Face in Soft Thick Seam
FU Yong-gang
LI Ying-ming
XU Xian-sheng
Abstract：According to problem that the rib spalling easy occurred in the coal wall of the rise mining face of soft thick seam,in order to re-veal the spalling mechanism of the coal wall in the high inclined rise mining face in soft thick seam and to have an effective method to pre-vent the spalling,an analytical method was applied to analyze the spalling mechanics mechanism of the coal wall in the high inclined rise coal mining face in soft thick seam.The numerical simulation method was applied to study the rise mining angle and the mining height af-fected to the coal wall spalling.The study showed that with the rise mining angle of the seam increaseing,the shearing failure of the coal wall would be occurred and thus the probability of the spalling occurred would be increased.Under the certain geological conditions,when the seam angle was over 10°,the spalling would be more serious.When the rise mining angle was in a certain condition,with the cutting height increased,the spalling depth would be increased.The rational cutting height had a critical value,when the cutting height was over the critical cutting height,the inner failure depth of the coal wall would be rapidly increased with the cutting height increased.
Keywords：soft thick seamlarge cutting heightrise miningrib spallingrational mining height
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 15-18 )