武汉轻工大学机械工程学院;
以含预制裂隙的锦屏大理岩半圆盘试样为研究对象，开展三点弯曲试验和数值模拟，研究预制裂隙长度和倾角两类几何参数对大理岩半圆盘试件断裂特性和声发射特性的影响规律。结果表明：预制裂隙长度增加时，大理岩的声发射累积计数减小。预制裂隙较短时，岩石内部产生更多微裂纹使有效裂纹长度增加；预制裂隙较长时，断裂长度较小导致所测峰值载荷偏低，最终使得断裂韧度和破坏程度呈现先增加后减小趋势。随着预制裂隙倾角的增大，大理岩由Ⅰ型断裂转变成Ⅰ-Ⅱ型混合断裂，大理岩的峰值载荷、破坏程度和声发射累积计数都逐渐减小。
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| 下载次数 | 被引频次 | 阅读次数 |
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基本信息:
DOI：
中图分类号:TD313
引用信息:
[1]王勇,李彬,周梦静等.预制裂隙几何对大理岩三点弯曲断裂行为的影响[J].矿冶,2025,34(02):221-227+234.
基金信息:
国家自然科学基金资助项目（52125903）