中南大学学报（自然科学版）2018，Vol.49Issue(1)：175-182,8.DOI:10.11817/j.issn.1672-7207.2018.01.023
考虑界面倾角及分形特性的组合煤岩体强度及破坏机制分析
Failure mechanism and strength of coal-rock combination bodies considering dip angles and fractal characteristics of interface
摘要
Abstract
In order to furtherly study the mechanical behavior of coal-rock combination bodies influenced by the interface, 25 test models of different fractal dimensions and dip angles of interface was designed, and the numerical experiments of mechanical characteristics and failure mechanism were carried out by using RFPA. The calculation results show that the dip angles and fractal dimensions of interface have obvious effect on the breaking strength, rupture mode, elastic modulus and damage of combination bodies. Breaking strength gradually decreases with the increase of dip angle of interface. Failure mechanism of combination bodies changes from shear failure to slip failure. The breaking strength and elastic modulus gradually increases with the increase of fractal dimension of interface, and the greater the dip angle, the greater the effect of the fractal characteristics of interface on the elastic modulus of combination bodies becomes, but the damage of combination bodies gradually decreases with the increase of fractal dimension, and the greater the fractal dimension is, the greater the amplitude of the damage value of combination bodies decreases.关键词
分形维数/组合煤岩体/倾角/破坏机制/损伤Key words
fractal dimension/coal-rock combination body/dip angle/failure mechanism/damage分类
矿业与冶金引用本文复制引用
曹吉胜,戴前伟,周岩,马德鹏..考虑界面倾角及分形特性的组合煤岩体强度及破坏机制分析[J].中南大学学报（自然科学版）,2018,49(1):175-182,8.基金项目
国家自然科学基金资助项目(41374118) （41374118）
重庆市教委科技计划项目(KJ1732439) （KJ1732439）
国家"十三五"重大专项(2016ZX05067-004-006, 2016ZX05045-004-007) (Project(41374118) supported by the National Natural Science Foundation of China （2016ZX05067-004-006, 2016ZX05045-004-007）
Project(KJ1732439) supported by the Science and Technology Plan of Education Committee of Chongqing City （KJ1732439）
Projects(2016ZX05067-004-006, 2016ZX05045-004-007) supported by the Key National Project of the 13th Five Year Plan) （2016ZX05067-004-006, 2016ZX05045-004-007）
