Study on Statistical Damage Model of Coal Rock Destruction Process
ZHANG Biao
ZHANG Suian
XIA Liman
WANG Qianwei
ZHANG Xiaodong
Abstract：For coal and rock properties,we make coal element strength subject to truncated normal distribution,and then introduce a variation coefficient to establish a statistical damage model applied to coal seam damage process.The results show that this model shows more reasonability in showcasing the evolution characteristics of damage.Parameters μ and δ,respectively,respond to the uniformity distribution of coal seam macro-scale failure strength and element strength;macroscpic strength is positively correlated with parameterμ,while it is negatively correlated with parameter δ.By further analysis of dimensionless macro-scale strength,we find that it's related to variation coefficient only.
Keywords：coal and rockstatistical damagebreaking strengthvariability coefficientcoalbed methane development
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 13-16 )