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冰川冻土  2014 

冻融循环作用下花岗斑岩和灰岩物理力学性质对比分析及应用研究

DOI: 10.7522/j.issn.1000-0240.2014.0076, PP. 632-639

Keywords: 露采金属矿山,冻融循环,物理力学特性,强度折减法,安全系数

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Abstract:

以花岗斑岩和灰岩两种岩性岩石为代表,实验研究了冻融作用下,岩石的致密程度、孔隙率等物理指标对岩石物理力学性质的影响.通过不同次数的冻融循环实验,对花岗斑岩和灰岩2种典型岩石样本的质量、单轴抗压强度、抗拉强度、冻融系数、风化程度的变化规律进行对比分析,并绘出了冻融次数与试样的抗压强度、抗拉强度、冻融系数的拟合关系曲线.在一定限定条件下,将实验结果应用于西藏玉龙铜矿花岗斑岩、灰岩边坡的具体实例中,采用强度折减法计算出了矿山边坡冻融风化前、后的安全系数,对比分析了花岗斑岩、灰岩边坡受冻融风化的影响程度,为矿山的设计和施工提供了参考.

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