Viscoelasto-plastic properties of deep hard rocks under water environment  

水环境下深部硬岩的黏弹塑性(英文)

作　　者：曹平[1] 万琳辉[1] 汪亦显[1] 黄永恒[1] 张向阳[1] 

机构地区：[1]中南大学资源与安全工程学院,长沙410083

出　　处：《Transactions of Nonferrous Metals Society of China》2011年第12期2711-2718,共8页中国有色金属学报（英文版）

基　　金：Project (10972238) supported by the National Natural Science Foundation of China;Project (2009bsxt061) supported by the Thesis Innovation Funds for the Central South University, China;Project (2009) supported by Hunan Administration of Work Safety Fund, China

摘　　要：Using a circular incremental step load and unload method, a set of rheological experiments were performed to study the viscoelasto-plastic properties of amphibolite in Jinchuan No.2 diggings under different environments. Based on the scientific analysis on rheological experimental data, the viscoelasto-plastic properties of amphibolite under different environments were studied. The results show that the instantaneous elastic modulus and viscoplastic properties of amphibolite are affected little, the viscoelastic properties of amphibolite are significantly affected. Based on the experimental results and characteristics of recovered rock specimen, a generalized Kelvin model was chosen to simulate rheological properties of amphibolites and key parameters were obtained. It is found that the creep deformation modulus E1 is significantly influenced by the water, while the instant elastic modulus E2 is not significantly affected. The discreteness of the viscosity coefficient η is large, the influence of water on η is not clear and needs to be further studied.采用分级增量循环加卸载方式,对金川有色金属公司二矿区深部斜长角闪岩进行干燥与水环境下的流变实验,分析流变实验数据,研究各级应力水平下斜长角闪岩两种试样的黏弹塑性。结果表明:水对岩石的瞬时弹模及黏塑特性的影响不大,对岩石黏弹性影响显著。分析水对岩石黏弹塑性影响的原因。根据试样的实验破坏前特点,选用广义开尔文模型描述斜长角闪岩流变特性,求得两种试样的岩石流变模型参数。模型参数分析发现:水对参数E1影响明显,而对参数E2影响不大;黏滞系数的离散性大,水对其影响不明确。

关 键 词：water viscoelasto-plastic property circular incremental step load and unload generalized Kelvin model 

分 类 号：P584[天文地球—岩石学]