摘要
利用冻三轴试验机研究了负温条件下梅林庙矿红砂岩的力学特性与变形规律。在-15℃低温条件下对红砂岩施加4种围压,分析了围压对岩石强度和弹性模量的影响。结果表明,在冻结条件下红砂岩轴向抗压强度与围压、弹性模量与围压均呈线性关系,红砂岩仍然遵循库仑强度准则。经回归分析得到红砂岩黏聚力为12.7 MPa,内摩擦角为30.4°。岩石破坏形式与围压大小相关。
The study of mechanical properties and deformation rule of Meilinmiao red sandstone have been conducted on freezing triaxial test machine. Four different confining pressures are applied separately on the samples at -15 ℃, and the effect of confining pressure to rock strength and Young＇s modulus are analyzed. The results show that both axial compressive strength and Young＇s modulus increase linearly as the confining pressure increases, and the red sandstone still meet Coulomb criterion. Through regression analysis, the cohesion of red sandstone is 12.7 MPa, and the internal friction angle is 30.4°. The rock failure form is related to confining pressure.
出处
《采矿与安全工程学报》
EI
北大核心
2014年第2期299-303,共5页
Journal of Mining & Safety Engineering
基金
国家自然科学基金委员会与神华集团有限责任公司联合资助项目(U1261126)
中央高校基本科研业务费专项基金项目(2010YL09)
关键词
冻结岩石
冻三轴试验
轴向抗压强度
弹性模量
负温
frozen rock
freezing triaxial test
axial compressive strength
Young＇s modulus
negative temperature
