采矿与安全工程学报2016，Vol.33Issue(2)：342-347,6.DOI:10.13545/j.cnki.jmse.2016.02.024
级配饱和破碎岩石压缩变形与分形特性试验研究
Experimental study on compaction and fractal characteristics of saturated broken rocks with different initial gradations
摘要
Abstract
AbstractUsing the MTS816.03 test system and self-designed compression apparatus for broken rocks, the compaction tests for saturated broken rocks with different lithologic have been conducted, and the influence of lithology, axial stress, initial gradations and loading rate on compaction deformation and fractal characteristics has been analyzed. The results have shown that:1) The compaction processes of gangue, mudstone and sandstone are similar and can be divided into two stages, including the rapid compaction deformation stage (0-4 MPa) and the slow compaction deformation stage (after 4 MPa). However, the compaction deformation rate of limestone is steady. 2) Under the same initial gradation, as axial stress increases, the fractal dimension of sandstone samples increases monotonously, and the breaking degree gets higher. The relations between fractal dimension and axial stress can be described by exponential function. 3) In the compacting process, as the Talbol exponent increases, the axial dis-placement increases. As the loading rate increases, the axial displacement decreases. 4) Under the same axial stress, 12 MPa, as the Talbol exponent increases, the increment of fractal dimension increases and the quantity of rock particles crushed increases. As the loading rate increases, the fractal dimension de-creases, and the breaking degree gets lower.关键词
粒径配比/饱和破碎岩石/压缩变形/分形维数Key words
initial gradation/saturated broken rocks/compaction deformation/fractal dimension分类
建筑与水利引用本文复制引用
郁邦永,陈占清,吴疆宇..级配饱和破碎岩石压缩变形与分形特性试验研究[J].采矿与安全工程学报,2016,33(2):342-347,6.基金项目
国家重点基础研究发展计划(973)项目(2013CB227900)；江苏省2014年度普通高校研究生科研创新计划项目(KYLX_1370)；国家自然科学基金项目(51404266，51404262) （973）
