在不同的湿度状态下,石灰岩石灰岩矿区的强度特征
Ahmed Gad1, Hasan Arman2, Saffet Yagiz3
1Geosciences Department, College of Science, United Arab Emirates University, Al Ain, 15551, United Arab Emirates.
Scientific reports
|October 21, 2025
概括
这项研究研究了水分如何影响三种石灰岩类型的机械强度:大质量破碎 (MLS),化石 (FLS) 和性 (SLS). 干燥的条件增加了强度,而和则显著削弱了岩石,特别是多孔的FLS.
科学领域:
- 地质技术工程 地质技术工程
- 材料科学 材料科学 材料科学
- 沉积岩石学 沉积岩石学
背景情况:
- 石灰石石灰岩表现出各种机械行为,受成分和环境因素的影响.
- 了解不同湿度条件下的岩石强度对于基础设施和地质稳定至关重要.
- 之前的研究还没有完全阐明石灰岩类型和湿度对碳酸岩力学的联合影响.
研究的目的:
- 在自然,干燥和和条件下,描述大质量破碎石灰岩 (MLS),化石石灰岩 (FLS) 和石灰岩 (SLS) 的机械性能.
- 评估石质层的组成,矿物学,纹理和水分对岩石强度参数的影响.
- 建立石灰岩地质化学,微观结构特征和机械反应之间的关系.
主要方法:
- 机械测试包括单轴压力 (UCS),点负载指数 (PLI) 和间接拉力强度 (ITS).
- 采石,矿物学和地质化学分析以确定石灰岩的组成和微观结构属性.
- 在三种不同的湿度条件下 (自然,干燥,和) 对岩石强度的比较分析.
主要成果:
- 与自然状态相比,干燥条件在MLS和SLS中增加了UCS高达200%.
- 和使UCS降低了30-60%,ITS降低了高达55%,FLS由于高孔隙性而最容易受到伤害.
- 质石灰岩 (SLS) 显示出最高的耐久性,而大质量破碎石灰岩 (MLS) 在断裂和后显示中等强度损失.
结论:
- 石灰岩的组成,特别是CaO,SiO2和MgO含量,显著控制碳酸盐岩的机械性质.
- 湿度状态是影响岩石强度的关键因素,和通常导致削弱.
- 这些发现为预测碳酸盐岩在地质和工程应用中的性能提供了必要的数据.
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