矿业科学学报2025，Vol.10Issue(6)：1140-1149,10.DOI:10.19606/j.cnki.jmst.2025052
钻孔回填试样力学特性及能量耗散特征研究
Mechanical properties and energy dissipation of samples with holes and backfilling
摘要
Abstract
This study addresses the conflict between pressure relief of large diameter borehole and weak-ening of roadway surrounding rock.Taking similar materials with strong impulse tendency as the re-search object,this study investigated the effect of large-diameter drilling on the strength of sample with impulse tendency under uniaxial compression.We analyzed the effects of large-diameter drilling and packing coupling on fracture propagation and energy dissipation by using PFC2D software.Results show that:(1)the peak strength of the sample exhibited more explicit weakening effect with the increase of the diameter of the drilling hole,and the peak strength of the sample was significantly higher under the action of filling;(2)The increase of borehole diameter was conducive to inhibiting the disorderly ex-pansion of cracks.With the increase of backfill strength,the interaction between backfill and sample matrix was conducive to controlling the expansion of cracks towards the boundary between backfill and-sample;(3)The energy release effect of the filling borehole sample was positively correlated with the strength of the filling body.Large-diameter and high-strength filling could improve the bearing capacity of surrounding rock under the premise of satisfying the pressure relief.关键词
回填/力学特征/PFC/破坏特征/能量演化Key words
backfill/mechanical characteristics/PFC/failure characteristics/energy evolution分类
矿业与冶金引用本文复制引用
王裕国,张玉江,姜海纳,郑浩东,陈叶星,李书乐,张帅,赵亮..钻孔回填试样力学特性及能量耗散特征研究[J].矿业科学学报,2025,10(6):1140-1149,10.基金项目
国家自然科学基金(52374100,52574120) （52374100,52574120）
中国博士后科学基金(2020M682215) （2020M682215）
