重庆大学学报2025，Vol.48Issue(12)：60-72,13.DOI:10.11835/j.issn.1000.582X.2025.12.006
循环荷载下不同岩性散体压实与再破碎特征
Compaction and re-crushing characteristics of granules with varying lithologies under multiple mining-induced disturbances
摘要
Abstract
To investigate the compaction and re-crushing characteristics of fractured rock under multiple mining.This study conducted cyclic loading and unloading mechanical tests on aggregates of different lithologies.The variation patterns of mechanical parameters of granules were systematically investigated.The granules energy evolution characteristics and fractal dimension were clarified.The research findings indicate that low-strength mudstone granules exhibit the greatest strain under identical loading conditions,requiring relatively low cumulative energy during compaction.Meanwhile,mudstone shows the highest fractal dimension,indicating the greatest degree of crushing.During the initial loading stage,the granules porosity rapidly decreases,the compressive modulus rises,and the granules is rapidly compacted.When stress exceeds a certain threshold,the compressive modulus continues to decrease,energy density increases significantly,and the granules undergo extensive fracture.The research findings provide significant support for elucidating the compaction and re-crushing mechanisms of granules in caving zones under multiple mining.关键词
多重采动/压实与再破碎/能量演化/粒径分布Key words
multiple mining/compaction and re-crushing/energy evolution/particle size distribution分类
资源环境引用本文复制引用
ZOU Quanle,JIANG Chengzi,MA Tengfei..循环荷载下不同岩性散体压实与再破碎特征[J].重庆大学学报,2025,48(12):60-72,13.基金项目
煤炭无人化开采数智技术全国重点实验室开放基金(SKLMRDPC23KF14). Supported by Open Fund of State Key Laboratory of Digital Intelligent Technology for Unmanned Coal Mining(SKLMRDPC23KF14). （SKLMRDPC23KF14）
