煤矿安全2019，Vol.50Issue(4)：46-49,53,5.DOI:10.13347/j.cnki.mkaq.2019.04.011
泥质含量对砂岩力学性质及其破坏特征的影响规律研究
Influence of Argillaceous Content on Mechanical properties and failure Characteristics of Sandstone
韩应伟 1王国伟 1马宏发2
作者信息
- 1. 济宁矿业集团 花园井田资源开发有限公司,山东 济宁 272200
- 2. 山东科技大学 矿业与安全工程学院,山东 青岛 266590
- 折叠
摘要
Abstract
Rock strength is one of the important factors which affect roof stability and selection of support methods. To study the influence of different argillaceous contents on mechanical properties and failure characteristics of roof sandstone, three kinds of sandstone with different amounts of muddy were tested under uniaxial compression and Brazil splitting test through SHIMADZU AG-X250 electronic universal testing machine. The test results show that: the existence of mud weakens the strength of sandstone. In three kinds of sandstone, containing with a small amount and a big amount of argillaceous sandstone, whose uniaxial compressive strength is reduced by 22 % and 4 % respectively compared with those without argillaceous sandstone, in addition, the tensile strength reduced by 47 % and 45 %, respectively. The reduction range of compressive strength and tensile strength is not synchronous; the ratio of initial elastic modulus Ei and tangent modulus Et of three kinds of sandstone is calculated and counted. Containing with a small amount of argillaceous sandstone has biggest θ value, indicating that its internal fracture develops well; through analyzing the failure modes of three types of sandstone, it is found that the shearing failure is non-argillaceous sandstone, the longitudinal splitting failure is argillaceous sandstone, and the inclination angle of the fracture surface with a small amount of argillaceous sandstone is smaller.关键词
泥质含量/砂岩/抗压强度/弹性模量/抗拉强度/破坏模式Key words
argillaceous content/sandstone/compressive strength/elastic modulus/tensile strength/failure mode分类
矿业与冶金引用本文复制引用
韩应伟,王国伟,马宏发..泥质含量对砂岩力学性质及其破坏特征的影响规律研究[J].煤矿安全,2019,50(4):46-49,53,5.
