工程地质学报2016，Vol.24Issue(3)：376-383,8.DOI:10.13544/j.cnki.jeg.2016.03.006
风化煤矸石抗剪强度粒径影响试验研究
EXPERIMENTAL STUDY ON THE EFFECT OF PARTICLE SIZE TO SHEAR STRENGTH OF WEATHERING GANGUE
摘要
Abstract
The distribution of coal gangue particle size along the vertical profile shows obvious regularity after been abandoned.Based on field gradation, the indoor direct shear tests of three grading weathering gangues in different moisture content were completed, the test results indicate that the stress -strain relationship of weathering gangue samples is from the strain softening to the strain hardening gradually with the increase of moisture content .The effect of gradation to shear strength of weathering gangue is difference in different moisture content , the backbone formed by coarse particles has an prominent influence to the internal friction angle of weathering gangue in low sample moisture content, but with the increase of moisture content , the effect of fine particle state is even more prominent.Along with the increase of moisture content , the cohesive force values among three grading coal gangues are close to accordance, but the declining rate of internal friction angle is obvious different , when the moisture content reaches saturation, the values of internal friction angle has dropped to near zero , at this time the shear strength of weathering gangue is mainly composition by its internal cohesive force .关键词
煤矸石/风化/直剪试验/含水率/级配/抗剪强度Key words
Coal gangue/Weathering/Direct shear test/Moisture content/Gradation/Shear strength分类
建筑与水利引用本文复制引用
李东升,刘东升,贺文俊,胡江雷..风化煤矸石抗剪强度粒径影响试验研究[J].工程地质学报,2016,24(3):376-383,8.基金项目
中央高校基本科研业务费（No．CDJZR12200009），重庆国土房管科技计划项目（20100009）资助． （）
