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Updated: Jan 7, 2026

A Uniaxial Compression Experiment with CO2-Bearing Coal Using a Visualized and Constant-Volume Gas-Solid Coupling Test System
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在近距离煤层中重复开采下,机械分析和地板故障机制的应用

Yingfu Li1,2, Yang Yao1, Tongtong Zhu1

  • 1School of Mining Engineering, Anhui University of Science and Technology, Huainan, 232001, Anhui, China.

Scientific reports
|December 14, 2025
PubMed
概括

煤矿重分配压力导致地板层变形. 分析证实了保护区,确保安全的采矿实践,并防止在重复采矿过程中水冲入.

关键词:
关闭煤层 关闭煤层失败机制的故障机制地板压力压力是什么机械分析 机械分析并行电气方法是并行电气方法.重复采矿是重复采矿的一种方式.

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Fatigue01:21

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Fatigue occurs when materials rupture under repeated or fluctuating loads, even at stress levels far below their static breaking strength. It typically results in brittle failure, even for ductile materials. It is a critical consideration in designing machines and structural components subjected to repetitive or varying loads. The nature of these loadings can range from fluctuating loads like unbalanced pump impellers causing vibrations to repeatedly bending a thin steel rod wire back and forth...
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Behavior of Concrete Under Compressive Load

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Microcracking in Concrete

Microcracking in concrete refers to the tiny cracks that can form within the material even before any external load is applied. These microcracks typically occur at the interface between the coarse aggregate and the hydrated cement paste, often as a result of differential volume changes prompted by variations in stress-strain behavior, as well as thermal and moisture movement. Initially, these microcracks remain stable and do not grow substantially until the concrete is stressed to about 30...
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Fatigue Strength of Concrete

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Considering the tensile strength of concrete involves recognizing that the theoretical strength of cement paste can be up to a thousand times higher than what is observed in practical applications. This significant discrepancy is largely attributed to the presence of microscopic cracks within the concrete. These cracks tend to amplify stress at their tips when a load is applied, a phenomenon explained by Griffith's theory of brittle fracture.
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Analyzing a supported beam under unsymmetrical loadings is essential in structural engineering to understand how beams respond to varied force distributions. This analysis involves calculating the deflection and identifying points where the slope of the beam is zero, which are crucial for ensuring structural stability and functionality.
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