Mesomechanics coal experiment and an elastic-brittle damage model based on texture features  

作　　者：Sun Chuanmeng Cao Shugang Li Yong 

机构地区：[1]School of Electrical and Control Engineering,North University of China,Taiyuan 030051,China [2]National Key Laboratory of Electronic Measurement Technology,North University of China,Taiyuan 030051,China [3]State Key Laboratory of Coal Mine Disaster Dynamics and Control,Chongqing University,Chongqing 400044,China [4]College of Resources and Environmental Science,Chongqi ng University,Chongqing 400044,China

出　　处：《International Journal of Mining Science and Technology》2018年第4期634-642,共9页矿业科学技术学报（英文版）

基　　金：funding by the National Natural Science Foundation of China(Nos.51474039 and 51404046);the Project of Shanxi Provincial Federation of Coalbed Methane Research(No.2013012010);the Science Foundation of North University of China(No.XJJ2016033)

摘　　要：To accurately describe damage within coal, digital image processing technology was used to determine texture parameters and obtain quantitative information related to coal meso-cracks. The relationship between damage and mesoscopic information for coal under compression was then analysed. The shape and distribution of damage were comprehensively considered in a defined damage variable, which was based on the texture characteristic. An elastic-brittle damage model based on the mesostructure information of coal was established. As a result, the damage model can appropriately and reliably replicate the processes of initiation, expansion, cut-through and eventual destruction of microscopic damage to coal under compression. After comparison, it was proved that the predicted overall stress-strain response of the model was comparable to the experimental result.To accurately describe damage within coal, digital image processing technology was used to determine texture parameters and obtain quantitative information related to coal meso-cracks. The relationship between damage and mesoscopic information for coal under compression was then analysed. The shape and distribution of damage were comprehensively considered in a defined damage variable, which was based on the texture characteristic. An elastic-brittle damage model based on the mesostructure informa- tion of coal was established. As a result, the damage model can appropriately and reliably replicate the processes of initiation, expansion, cut-through and eventual destruction of microscopic damage to coal under compression. After comparison, it was proved that the predicted overall stress-strain response of the model was comparable to the experimental result.

关 键 词：Mesomechanics experiment Image processing Texture feature Damage variable Damage model 

分 类 号：TQ531[化学工程—煤化学工程]