南京理工大学学报（自然科学版）2016，Vol.40Issue(4)：485-492,8.DOI:10.14177/j.cnki.32-1397n.2016.40.04.018
不同煤岩组合体力学特性的数值模拟研究
Numerical simulation of different combination of coal and rock sample mechanics and acoustic emission characteristics
摘要
Abstract
In order to study the mechanical properties and acoustic emission characteristics of different coal-rock combined bodies, the RFPA2D is used to simulate different combination modes include the rock and the combination inclined angle. Under different confining pressure, the mechanical properties and the AE characteristics are obtained. The results show that:the different samples have the similar uniaxial stress-strain curves and the peak strengths of the different coal-rock combined bodies are close to the strength of the coal. With the increasing of the combination inclined angle,the greater of the rock strength,the earlier the strength of coal-rock combined bodies decay quickly. The internal friction angles of the coal-rock combined bodies reduce with the increasing of the combination angle,while the cohesions of the samples increase firstly and then decrease. With the increase of the confining pressure,the maximum AE ringing counting rates of the samples have expe-rienced the process that decrease firstly and then increase. The maximum AE ringing counting rates of the samples have a positive correlation with the strength of the rock in the coal-rock combination bodies.关键词
煤岩组合体/数值模拟/力学特性/声发射Key words
coal-rock combination body/numerical simulation/mechanical property/acoustic emission characteristics分类
建筑与水利引用本文复制引用
付斌,周宗红,王友新,刘松,肖迎春..不同煤岩组合体力学特性的数值模拟研究[J].南京理工大学学报（自然科学版）,2016,40(4):485-492,8.基金项目
国家自然科学基金(51264018 （）
51064012) （）
