Research on Influence of Mining Height on Mining Fissure Evolution
LI Shugang
LI Zhiliang
LIN Haifei
ZHAO Pengxiang
LI Haotian
Abstract：In this paper, study was carried out on the evolution regularity of the mining fissures under different mining height by taking the geological and mining conditions of a coal mine as background and using the physical similar material simulation and theoretical analysis methods. The results showed that the development morphology and evolution regularity of the mining fissures under different mining height were similar, their evolution and distribution assumed two-stage characteristics of parabolic and saddle;with the increase of the mining height, the development height of fissures also increased, and it was in a secondary positive correlation to the mining height. The peak value of the stress concentration factor in the floor gradually decreased with the increase of the mining heights, and it was in a negative correlation to the logarithm of the mining height;the peak value of the stress concentration factor in the floor increased with increase of the distance to the coal wall, and it was in a positive correlation to the exponent of the mining height.
Keywords：mining heightmining fissurefissure densityfissure height
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 25-28 )