结构特征对多弱岩石斜坡稳定性的影响,考虑到地质技术参数的空间变化
Qingqing Zhang1, Huabin Zhang2, Laigui Wang1
1School of Mechanics and Engineering, Liaoning Technical University, Fuxin, Liaoning, China.
Scientific reports
|December 23, 2024
概括
矿山坡度的稳定性受弱层和地质因素的影响. 增加斜坡角度或高度会降低安全性,而斜坡角度是稳定性的最关键因素.
科学领域:
- 地质技术工程 地质技术工程
- 岩石机械学 岩石机械学
- 采矿工程 采矿工程 采矿工程
背景情况:
- 露天矿山坡道具有复杂的结构,具有多个弱层,对稳定性至关重要.
- 地质技术参数表现出由于在随机影响下弱岩层和完整岩层之间相互作用的空间变化.
研究的目的:
- 在随机地质技术参数下,研究结构特征对岩石斜坡稳定性的影响.
- 分析斜坡角度,弱层沉降和斜坡高度对斜坡变形和安全因素的影响.
主要方法:
- 产生了20个具有不同结构特征的通用岩石斜坡模型.
- 采用拉丁式超立方采样 (LHS) 进行高效的地质技术参数随机场生成.
- 使用FLAC3D和强度降低方法进行数值建模和稳定性分析.
主要成果:
- 增加的斜坡角度和高度通常会降低床铺和防坡的安全因子.
- 斜坡角度是影响安全因素的最敏感参数,其次是弱层沉降和斜坡高度.
- 防坡的稳定性明显高于床铺坡,具有不同的故障模式.
结论:
- 降低斜坡角度比降低斜坡高度更有效地提高斜坡稳定性.
- 薄弱层沉降显著影响床铺斜坡的稳定性,改变故障模式从滑动到滑动.
- 了解这些关系对于优化开采矿设计和确保安全至关重要.
更多相关视频
09:44Use of Principal Components for Scaling Up Topographic Models to Map Soil Redistribution and Soil Organic Carbon
Published on: October 16, 2018
10.1K
09:00Visualization of Failure and the Associated Grain-Scale Mechanical Behavior of Granular Soils under Shear using Synchrotron X-Ray Micro-Tomography
Published on: September 29, 2019
13.3K
相关概念视频
Stability of structures
156
In mechanical engineering, the stability of systems under various forces is critical for designing durable and efficient structures. One fundamental way to explore these concepts is by analyzing systems like two rods connected at a pivot point, O, with a torsional spring of spring constant k at the pivot point. This system is similar in appearance to a scissor jack used to change tires on a car. In this case, the arms of the linkage (equivalent to the rods in this system) are entirely vertical,...
156
Design Consideration
180
Designing a structure involves a series of considerations, primarily the material's ultimate strength, calculated through tests that measure changes under increased force until the material reaches its breaking point or limit. The ultimate load, where the material breaks, is divided by its original cross-sectional area, resulting in the ultimate normal stress or strength. The ultimate shearing stress is another significant factor taken into account.
The factor of safety is another key...
The factor of safety is another key...
180
Bending of Members Made of Several Materials
140
In analyzing a structural member composed of two different materials with identical cross-sectional areas, it is crucial to understand how their distinct elastic properties affect the member's response under load. The analysis involves assessing stress and strain distributions using the transformed section concept, which accounts for variations in material properties.
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each...
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each...
140
Indeterminate Structure
500
Indeterminate structures refer to structures where internal forces and reactions cannot be determined using only the equations of static equilibrium. Indeterminate structures have more unknown forces and reaction forces than equations of static equilibrium that can be used to determine them. Indeterminate structures are often used in engineering to create complex, efficient, and aesthetically pleasing structures. There are various types of indeterminate structures used in engineering and...
500
Elasticity in Concrete
82
Upon subjecting concrete to moderate or high uniaxial compressive or tensile stresses, the strain response is non-linear relative to the stress applied. As the stress is removed, the resulting stress-strain curve deviates from the original path traced during loading, creating a hysteresis loop, indicative of the concrete's non-linear and non-elastic properties. Typically, a material's modulus of elasticity, which is a measure of the material's stiffness, is inferred from the linear...
82
Dynamic Modulus of Elasticity of Concrete
254
The dynamic modulus of elasticity assesses how a concrete structure deforms under impact or dynamic loads. It is typically higher than the static modulus of elasticity, measured under slow, steady loading conditions.
The sonic test is a common method to determine the dynamic modulus. In this test, a concrete beam, sized either 6 x 6 x 30 inches or 4 x 4 x 20 inches, is clamped at its center. Vibrations are initiated at one end of the beam by an electromagnetic exciter unit powered by...
The sonic test is a common method to determine the dynamic modulus. In this test, a concrete beam, sized either 6 x 6 x 30 inches or 4 x 4 x 20 inches, is clamped at its center. Vibrations are initiated at one end of the beam by an electromagnetic exciter unit powered by...
254
