关于人工钢筋混凝土屋顶厚度的研究,用于在碎片化岩石质沉积物中随后的回填方法
Jiaxiang Zhou1, Nan Yao2,3, Yicheng Ye1,4
1School of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan, 430081, Hubei, China.
Scientific reports
|July 2, 2025
概括
人工钢筋混凝土屋顶 (ARCRs) 和扩张性回填 (EB) 提高了矿山的稳定性. 这项研究确定了最佳ARCR厚度,并证明了EBEB.
科学领域:
- 采矿工程 采矿工程 采矿工程
- 地质技术工程 地质技术工程
- 岩石机械学 岩石机械学
背景情况:
- 对碎片岩石群体的开放式采矿面临着诸如屋顶倒塌等挑战.
- 人工钢筋混凝土屋顶 (ARCR) 和屋顶接触填充 (RCF) 是拟议的解决方案.
- 晋山铁矿的碎片矿石体作为一个案例研究.
研究的目的:
- 为了确定碎片岩石质量采矿中ARCR的最佳厚度.
- 评估屋顶接触填充 (RCF) 方法的有效性,特别是扩展性回填充 (EB),以提高停车位的稳定性.
- 为安全和高效的深度采矿作业提供理论基础.
主要方法:
- 结合薄板和简单支梁模型用于ARCR厚度计算.
- 在不同的ARCR厚度和RCF条件下分析stop稳定性的FLAC3D数值模拟.
- 研究了膨胀回填 (EB) 对应力分布和变形的影响.
主要成果:
- 确定了4-5米的安全ARCR厚度范围,以获得最佳稳定性.
- 扩展性回填 (EB) 显著提高了稳定性,降低了应力度,并最大限度地减少了屋顶沉降和地板升降.
- EB的膨胀应力提供了反向支,有效地管理了ARCR的压力应力.
结论:
- 集成ARCR和EB提供了一个强大的解决方案,以减轻碎片岩石采矿的屋顶崩.
- 最佳的ARCR厚度和EB的使用对于确保杆完整性和操作安全至关重要.
- 这项研究为深层碎片化矿床的安全和有效开发提供了宝贵的见解.
相关概念视频
01:22Fiber Reinforced Concrete
143
Fiber-reinforced concrete significantly enhances the structural and nonstructural properties of traditional concrete by incorporating fibers like steel, glass, and polymers. These fibers, varying from natural ones such as sisal and cellulose to manufactured ones like polypropylene and Kevlar, are mixed into hydraulic cement with aggregates. Steel fibers, often preferred for their robustness, contribute to improved ductility, toughness, and post-cracking performance. The concrete is classified...
143
01:25Reinforcements in Concrete
164
Reinforced concrete is a composite material used extensively in construction, combining the compressive strength of concrete with the tensile strength of steel. This synergy is essential as concrete, while excellent at resisting compression, is weak under tension. Steel bars, or rebars, are embedded in the concrete to handle these tensile forces. The choice of steel is strategic; it shares a similar coefficient of thermal expansion with concrete, which ensures uniformity in response to...
164
01:15Reinforced Brick Masonry
1.2K
Reinforced brick masonry is an advanced construction technique that enhances the structural integrity of brick walls by incorporating steel reinforcements. These reinforcements are either placed within the hollow cores of bricks or sandwiched between two layers of masonry, known as wythes, and are then secured in place with grout. Grout is a fluid mixture composed of Portland cement, aggregate, and water, providing the necessary bonding agent for the steel and brick.
To fortify brick walls...
To fortify brick walls...
1.2K
01:29Preplaced Aggregate Concrete
142
Preplaced aggregate concrete is ideal for construction environments that are not easily accessible. The process begins by properly wetting the gap-graded coarse aggregates to remove the dirt, then placing it in the form and compacting it. Voids are filled with a mortar mix pumped under pressure through slotted pipes. This mortar typically consists of Portland cement, pozzolan, fine aggregates, water, and a fluidizing aid. The pozzolan helps reduce bleeding and segregation while improving the...
142
01:20Concrete
453
Concrete is a vital construction material extensively used worldwide, primarily valued for its strength, durability, and versatility, which it provides for various structural designs. Concrete generally comprises ingredients like Portland cement, coarse gravel, fine sand, and water. Concrete can be mixed by simple hand methods or industrially at computer-controlled plants. The mixture consists of aggregates and a paste made from water and Portland cement. This paste coats the aggregates and,...
453
01:22Design Example: Distributing Reinforcements in Concrete Sections
137
The topic explores the practical aspects of adjusting steel reinforcements within a concrete beam section to meet specific design requirements. When designing a reinforced concrete beam, it is essential to distribute the steel reinforcements properly to ensure structural integrity and efficiency. The example provided details a scenario where a beam requires a total steel cross-section of 4 square inches. The engineer identifies that the available steel bars have a nominal diameter of 1.693...
137