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煤炭工程  2014 

绿泥岩冻结前后力学性质变化的点荷载试验研究

DOI: 10.11799/ce201408023, PP. 70-73

Keywords: 绿泥岩,点荷载试验,冻结效应,抗压强度,电镜扫描试验

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Abstract:

对绿泥岩展开了常温点荷载试验,发现不规则岩块的试验结果与规则岩芯的径向点荷载试验结果相差不大,绿泥岩外形对其点荷载试验结果的影响很小。常温下绿泥岩属于较坚硬岩。饱水绿泥岩冻结以后抗压强度下降34.5%,为较软岩,饱水冻结对绿泥岩的强度影响很大。通过微观电镜扫描,发现绿泥岩存在大量孔洞和裂隙,因此饱水冻结后,由于水变成冰体积膨胀引起岩石内部结构的变化,导致岩石强度降低。

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