Study on mechanical properties and fractal evolution law of containing tectonic coal combination
SHAO Qiudong
PEI Wenbo
LI Qiping
REN Xingpeng
ZHAO Pengxiang
TIAN Yanbiao
GUO Li
Abstract：To study the mechanical properties of tectonic coal combination specimens,based on the occurrence characteristics of coal seam in a high gas mine,this study carried out the mechanical properties test experiment of loading and fracture process of contain-ing tectonic coal combination,and quantitatively analyzed the fracture evolution law of containing tectonic coal combination speci-mens by introducing fractal dimension.The results show that the compressive strength of the composite specimens containing tecton-ic coal is negatively correlated with the proportion of tectonic coal thickness,and the range of compressive strength variation corres-ponding to the proportion of structural coal thinkness from 0 to 100%is 22.94-7.65 MPa.The fractal dimensions of peak strain and peak stress point are positively correlated with the proportion of tectonic coal thickness,and the variation ranges of the fractal dimen-sions of the peak strain and peak stress points corresponding to the proportion of structural coal thickness from 0 to 100%are 1.21%-1.80%and 1.171 4-1.196 7,respectively;the fractal dimension of the composite specimens containing tectonic coal increases gradu-ally with the increase of loading stress.The larger the proportion of tectonic coal thickness,the higher the complexity of the surface fracture development of the corresponding test piece when the fracture occurs.
Keywords：coal and rock dynamic disasterscontaining tectonic coal combinationloading fracturefracture evolutiondamage pat-ternfractal characteristics
Publication Date：2025-06-20
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：10( 123-132 )