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黄金科学技术 ›› 2017, Vol. 25 ›› Issue (1): 93-98.doi: 10.11872/j.issn.1005-2518.2017.01.093

• 采选技术与矿山管理 • 上一篇    下一篇

不同骨料含量胶结充填体的应力—应变关系研究

曹世荣,韩建文,肖伟晶,卓毓龙,王晓军*,冯萧   

  1. 江西理工大学江西省矿业工程重点实验室,江西  赣州   341000
  • 收稿日期:2016-07-25 修回日期:2016-11-23 出版日期:2017-02-28 发布日期:2017-05-12
  • 通讯作者: 王晓军(1979-),男,山西晋中人,副教授,从事矿山岩体稳定性分析与测试研究工作。879408217@qq.com
  • 作者简介:曹世荣(1993-),男,江西景德镇人,硕士研究生,从事矿山岩体稳定性分析与测试研究工作。1219969230@qq.com
  • 基金资助:

    国家自然科学基金项目“循环载荷下矿山固废胶结充填体损伤过程声发射特性研究”(编号:51304083)和江西省科技支撑计划项目 “急倾斜薄脉群钨矿床开采岩体失稳控制技术集成与示范”(编号:20141BBE50005)联合资助

Study on Stress-Strain Relationship of Cemented Backfilling with Different Aggregate Content

CAO Shirong,HAN Jianwen,XIAO Weijing,ZHUO Yulong,WANG Xiaojun,FENG Xiao   

  1. Jiangxi Key Laboratory of  Mining&Mining Engineering,Jiangxi University of Science and Technology,Ganzhou    341000,Jiangxi,China
  • Received:2016-07-25 Revised:2016-11-23 Online:2017-02-28 Published:2017-05-12

摘要:

为研究粗骨料对充填体应力—应变关系的影响,在RMT-150C岩石力学试验系统上对4组不同粗骨料取代率充填体试件进行单轴压缩试验。结果表明:粗骨料对充填体应力应变、弹性模量等物理参数均有较大影响;适量骨料可显著提升充填体强度,同时保证了充填体对变形能的吸收能力,表明其内部结构是材料及配比之外对峰值强度产生较大影响的又一关键性因素,可为矿山充填料制备与充填方案选取提供参考;4组试件峰值点损伤值分别为0.28,0.33,0.26,0.30,骨料含量为20%的充填体峰值强度最大,损伤程度也最大;对比理论与试验曲线,发现基于损伤力学的本构模型对含骨料充填体峰前阶段应力应变及损伤的描述是准确的。

关键词: 骨料, 充填体, 力学特性, 本构关系

Abstract:

In order to study the influence of bulk aggregate on the stress-strain relationship of  backfilling,four groups of different aggregate replacement rate backfilling specimens were tested by uniaxial compression test in the RMT-150C rock mechanics test system.Experimental results show that aggregate has great influence on the physical parameters such as stress and strain,elastic modulus and so on.The strength of backfilling can be significantly improved with the amount of aggregate,at the same time to ensure that the variable performance of the absorption.It shows that the structure is another key factor with the exception of the material and the ratio who influence the peak stress and strain,this can provide  reference for the preparation of backfilling material for mining.The peak values of the four groups were 0.28,0.33,0.26 and 0.30,respectively.The peak strength and the damage degree of the filling with aggregate  content of 20%was the highest.The constitutive relation model of damage mechanics is more accurate to describe the stress and damage in the pre-peak stage of aggregate backfilling.

Key words: aggregate, backfilling, mechanical behavior, constitutive relation

中图分类号: 

  • TD853

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