Fractal Characteristic of Fissured Coals Crack Evolution under the Action of Abutment Pressure
Quantitative description for the evolution of crack in fissured coal is one of the fundamental problems of rock mechanism. Based on the field observation of the abutment pressure, the coal mass cracking process was simulated on the compress machine, and the whole stress-strain curve was obtained. Using fractal geometry theory, thequantitative description of the evolution of fissure system in coal sample is achieved. It is discovered that, the relationship between the fractal dimension of the crack and the abutment pressure is polynomial expression. Based on damage mechanics, the constitutive equation of fissured coal was deduced.
fractal dimension fissured coal crack evolution abutment pressure
WEI Jinping GAO Jinhai LI Zhonghua
School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, Henan, China
国际会议
The 2007 International Symposium on Safety Science and Technology(2007采矿科学与安全技术国际学术会议)
河南焦作
英文
154-159
2007-04-17（万方平台首次上网日期，不代表论文的发表时间）