摘要
通过模拟高寒地区自然条件,对牛苦头矿区露天边坡4种典型的岩石样本进行冻融循环试验,测定岩石的质量、强度变化特性,分析其外观特征、质量损失率及抗冻系数的变化。试验结果表明,岩样的质量在冻融状态下有较小降低,影响甚微;岩样在冻融初期其微观结构变化较大,冻融作用对岩石造成的损伤较大,而冻融后期其对岩石造成的损伤相对较有限。岩样在冻融作用后抗冻系数变低,矿区岩体抗冻性相对较强。试验结果为边坡稳定性研究提供基础数据,指导矿山以后的安全生产。
By simulating natural conditions in the cold region of Niukutou Mine, freezing-thawing cycling test is carried out for the four kinds of rock samples from the open-pit slope. The change of appearance characteristic, mass loss and frost-resistance are analyzed by testing the variation of quality and strength of different rock samples. The experiment results show that the qualities of rock samples have a little reduce under freezing and thawing condition. At the beginning of the freezing-thawing, the changing of microscopic structure and damage of rock samples are large, but the damage is relatively limited at the later stage. Coefficients of frost-resistance of rock samples become lower after freezing-thawing effect, but the frost-resistance of rock mass is relatively stronger. Experimental results provide basic data for the research of slope stability and guide the safety production of Niukutou Mine.
出处
《有色金属（矿山部分）》
2014年第2期63-66,共4页
NONFERROUS METALS(Mining Section）
关键词
冻融循环
露天边坡
单轴抗压强度
物理力学特性
freezing-thawing cycle
open-pit slope
uniaxial compressive strength
physical and mechanicalcharacteristics
