Progressive fracture evolution and mechanical response of cavity-containing sandstone under low-frequency disturbance

JIANG Ming-wei; LIANG Yun-tao; XUE Shan-shan; LI Hai-tao; HE Tuan; YANG Cheng; YANG Guan-yu; MA Ju; PENG Chao

doi:10.16285/j.rsm.2025.00353

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Progressive fracture evolution and mechanical response of cavity-containing sandstone under low-frequency disturbance

更新时间：2026-07-06

- Progressive fracture evolution and mechanical response of cavity-containing sandstone under low-frequency disturbance
- Vol. 47, Issue 6, Pages: 2041-2054(2026)
- 作者机构：
  
  1. 煤炭科学研究总院,北京,100013
  2. 中煤科工集团沈阳研究院有限公司,辽宁,抚顺,113000
  3. 中国矿业大学（北京）应急管理与安全工程学院,北京,100083
  4. 煤炭科学研究总院有限公司深部开采与冲击地压防治研究院,北京,100013
  5. 中国煤炭科工集团煤炭智能开采与岩层控制国家重点实验室,北京,100013
  6. 中南大学资源与安全工程学院,湖南,长沙,410083
  7. 山东黄金集团深井开采实验室有限公司,山东,烟台,264000
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2025.00353
  CLC： TD315
- Online First：06 June 2026，
  
  Published：2026
- 稿件说明：
移动端阅览
JIANG Ming-wei, LIANG Yun-tao, XUE Shan-shan, et al. Progressive fracture evolution and mechanical response of cavity-containing sandstone under low-frequency disturbance[J]. 2026, 47(6): 2041-2054.
DOI：

JIANG Ming-wei, LIANG Yun-tao, XUE Shan-shan, et al. Progressive fracture evolution and mechanical response of cavity-containing sandstone under low-frequency disturbance[J]. 2026, 47(6): 2041-2054. DOI： 10.16285/j.rsm.2025.00353.

摘要

在深部煤炭开采过程中，层间岩体在高静应力与低频动载耦合作用下，易发生破裂与失稳，进而诱发动力灾害。为探究低频扰动条件下岩石破裂、变形及力学响应特征，开展了不同加载速率下含孔砂岩试样的单轴压缩试验。重点分析了扰动作用下砂岩裂纹演化规律、破碎弹射模式及动态应变响应特征。研究结果表明：（1）加载速率对砂岩力学性质具有显著影响，峰值强度随加载速率呈非线性增长。当加载速率提高至5倍时，单孔、双孔及三孔试样的平均峰值强度分别提高了9.67%、14.64%和9.44%。然而，随着孔洞数量的增加，砂岩整体承载能力下降，其平均峰值强度分别降低了12.58%、12.15%和13.23%。（2）砂岩的声发射（acoustic emission，简称AE）特征及应力−时间演化曲线均呈现明显拐点特征。在裂纹萌生阶段，AE活动较为微弱，而在破坏前AE事件出现显著突增，AE能量呈指数级增长。该特征可作为低频扰动条件下高应力砂岩发生动力失稳的重要前兆信息。（3）根据破坏形态以及表面剥落与块体弹射程度，砂岩破坏可划分为3种类型。I型、II型和III型试样的峰值强度比

平均值分别为0.959、0.765和0.687，表明不同破坏模式下其力学性质存在显著差异。（4）岩石试样的应变分布与孔洞数量密切相关。随着孔洞数量增加，加载过程中孔间逐渐形成明显的应力屏蔽区及水平拉应变集中区，这些区域成为裂纹扩展的主要通道。

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