侧限条件下充填散体与岩柱相互作用机理

doi:10.12068/j.issn.1005-3026.2021.01.019

东北大学学报（自然科学版） ›› 2021, Vol. 42 ›› Issue (1): 124-130.DOI: 10.12068/j.issn.1005-3026.2021.01.019

侧限条件下充填散体与岩柱相互作用机理

勒治华，于庆磊，郑浩田，曹永胜

(东北大学资源与土木工程学院，辽宁沈阳110819)

出版日期:2021-01-15 发布日期:2021-01-13
通讯作者: 勒治华
作者简介:勒治华(1992-)，男，江西南昌人，东北大学博士研究生; 于庆磊(1981-)，男，山东泰安人，东北大学教授，博士生导师.
基金资助:
“十三五”国家重点研发计划项目(2016YFC0801602); 国家自然科学基金资助项目(52074046).

Interaction Mechanism Between Granular Backfill and Rock Pillar Under Lateral Confined Conditions

LE Zhi-hua， YU Qing-lei， ZHENG Hao-tian， CAO Yong-sheng

School of Resources & Civil Engineering， Northeastern University， Shenyang 110819， China.

Online:2021-01-15 Published:2021-01-13
Contact: YU Qing-lei
About author:-
Supported by:
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摘要/Abstract

摘要： 为研究干式充填采矿中充填散体与围岩的相互作用，分析充填散体对矿柱力学性能的影响，利用自制的测试充填散体约束下岩样轴向压缩性能的试验装置模拟充填散体约束矿柱的作用过程，进行不同粒级散体约束下岩柱的压缩试验.结果表明:充填散体改善了岩柱的受力状态，并对岩柱提供被动侧向支撑作用，提高了岩柱轴向应力峰值和残余强度，改变了岩柱的破坏形式；散体与岩柱的相互作用强度随约束散体粒径增大呈先增后减的变化趋势；基于试验分析，建立了充填散体与矿柱相互作用过程中矿柱的承载模型，得到了充填散体变形模量与矿柱弹性模量的关系式.

关键词: 充填散体；岩柱侧限压缩试验；被动侧向支撑；相互作用；变形模量

Abstract: In the dry filling mining method， in order to study the interactions between the granular backfills and surrounding rock， and analyze the influence of backfills on the mechanical properties of pillars， a self-made device was used to test the axial compressive properties of rock pillar confined by granular backfills and a series of compressive tests of rock pillar were conducted considering the various particle size of the granular backfills. The results show that the granular backfills improve the stress state of the rock pillar， and the peak and residual compressive strengths of rock pillar are enhanced due to the passive lateral support of the granular backfills. Meanwhile， the failure pattern of the rock pillar has changed. With an increase of the particle size of granular backfills， the interaction between the granular backfills and the rock pillar intensifies first and then weakens. On this basis of testing results， the model for bearing capacity of pillar is established considering the interaction between granular backfills and rock pillar， and the relationship between the deformation modulus of granular backfills and rock pillar is given.

Key words: granular backfill; lateral confined compression test of rock pillar; passive lateral support; interaction; deformation modulus

中图分类号:

TD853

勒治华，于庆磊，郑浩田，曹永胜. 侧限条件下充填散体与岩柱相互作用机理[J]. 东北大学学报（自然科学版）, 2021, 42(1): 124-130.

LE Zhi-hua， YU Qing-lei， ZHENG Hao-tian， CAO Yong-sheng. Interaction Mechanism Between Granular Backfill and Rock Pillar Under Lateral Confined Conditions[J]. Journal of Northeastern University(Natural Science), 2021, 42(1): 124-130.

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侧限条件下充填散体与岩柱相互作用机理

Interaction Mechanism Between Granular Backfill and Rock Pillar Under Lateral Confined Conditions

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