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碳酸盐岩溶蚀效应及力学特性

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针对不同赋存环境下溶蚀对碳酸盐岩力学特性的影响,采用自主研发的岩石动水压力溶蚀试验设备,开展多因素影响下碳酸盐岩溶蚀及单轴抗压强度试验,研究碳酸盐岩溶蚀效应、力学性质劣化规律及化学损伤.试验结果表明,不同赋存环境下岩样出现了不同程度的力学损伤,其抗压强度和弹性模量在溶解后有所下降,溶蚀率越高,峰值应力和弹性模量越低,进而提出劣化度拟合关系式,得到影响岩样抗压强度敏感度的各因素,依次为pH值、温度、时长、流速、动水压力及溶蚀后岩样的微观结构和矿物成分组成.
Dissolution effect and mechanical properties of carbonate rocks
To investigate the influence of erosion on the mechanical properties of carbonate rocks under different occurrence environments,the erosion and uniaxial ultimate tensile strength tests were performed on carbonate rocks under the influence of various factors by using a self-developed rock hydrodynamic pressure dissolution test equipment.The dissolution effect,deterioration law of mechanical properties and chemical damage of carbonate rocks were investigated.The test results show that different degrees of mechanical damage emerge in the rock samples under different occurrence environments.The compressive strength and elastic modulus of rock samples decrease after dissolution.The peak stress and elastic modulus decrease with the increasing dissolution rate,and a deterioration fitting correlation was proposed further.In addition,various factors,in the sequence of pH,temperature,time,water velocity,hydrodynamic pressure,the microstructure and mineral composition of rock samples after dissolution,influencing the sensitivity of rock samples compressive strength can be obtained.

carbonate rockoccurrence environmentdissolution testuniaxial ultimate tensile strength testdissolution effectmechanical propertydeterioration lawchemical damage

孟津竹、陈四利、王军祥、张靖宇

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沈阳工业大学材料科学与工程学院,辽宁 沈阳 110870

沈阳工业大学建筑与土木工程学院,辽宁 沈阳 110870

碳酸盐岩 赋存环境 溶蚀试验 单轴抗压强度试验 溶蚀效应 力学特性 劣化规律 化学损伤

辽宁省教育厅重点攻关项目

LZGD2020004

2024

10.7688/j.issn.1000-1646.2024.03.17

沈阳工业大学学报
沈阳工业大学

沈阳工业大学学报

CSTPCD北大核心
影响因子：0.62
ISSN：1000-1646
年,卷(期)：2024.46(3)
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