img

QQ群聊

img

官方微信

  • CN 62-1112/TF 
  • ISSN 1005-2518 
  • 创刊于1988年
高级检索
采选技术与矿山管理

基于声发射概率密度函数固废胶结充填体损伤分析

  • 曹世荣 ,
  • 韩建文 ,
  • 李永欣 ,
  • 王晓军 * ,
  • 冯萧 ,
  • 卓毓龙
展开
  • 江西理工大学江西省矿业工程重点实验室,江西   赣州   341000
曹世荣(1993-),男,江西景德镇人,硕士研究生,从事工程岩体稳定性方面的研究工作。bugcsr@163.com

收稿日期: 2017-03-30

  修回日期: 2017-06-28

  网络出版日期: 2018-05-18

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

Damage Analysis of Solid Waste Rock Cemented Filling Body Based on Acoustic Emission Probability Density Function

  • CAO Shirong ,
  • HAN Jianwen ,
  • LI Yongxin ,
  • WANG Xiaojun ,
  • FENG Xiao ,
  • ZHUO Yulong
Expand
  • Jiangxi Key Laboratory of Mining Engineering,Jiangxi University of Science and Technology,Ganzhou   341000,Jiangxi,China

Received date: 2017-03-30

  Revised date: 2017-06-28

  Online published: 2018-05-18

摘要

固废胶结充填体是保障矿山安全回采的关键承载结构,为探究其实际承载损伤破坏过程,在RMT-150C岩石力学测试系统上对不同粗骨料含量的4组胶结充填体试样进行了单轴压缩与循环载荷下的声发射试验。结果表明:循环载荷下,4组试样均具有显著的Kaiser效应,且含块石的3组试样声发射事件数更丰富,峰值应力前达到了纯尾砂试样的152%、225%和300%。同时,利用声发射概率密度与承载应力水平间的关联性,得到了4组不同块石含量胶结充填体的声发射概率密度方程,通过声发射概率密度函数实现了声发射参数量化分析胶结充填体承载损伤过程。对比损伤变量—应力水平曲线可以看出,块石的加入能够有效减缓并抑制前期损伤,当块石含量为20%时,效果最好。

本文引用格式

曹世荣 , 韩建文 , 李永欣 , 王晓军 * , 冯萧 , 卓毓龙 . 基于声发射概率密度函数固废胶结充填体损伤分析[J]. 黄金科学技术, 2017 , 25(6) : 92 -98 . DOI: 10.11872/j.issn.1005-2518.2017.06.092

Abstract

Solid waste rock cemented filling body is the key load bearing structure of ensuring safety mining of mines,in order to investigate its actual load bearing damage and failure process,the acoustic emission tests of four groups of cemented filling specimens with different coarse aggregate contents were carried out under uniaxial compression and cyclic loading on the RMT-150C rock mechanics test system.Results showed that four groups of samples has significant Kaiser effect under cyclic loading,and the number of acoustic emission events of three groups  of specimens containing block stones was more abundant,and 152%,225% and 300% of pure tailings were reached before the peak stress.At the same time,the acoustic emission probability density equations of four groups of cemented filling body with different block stone contents were obtained by using the correlation between acoustic emission probability density and stress level.Quantitative analysis of bearing damage process of cemented backfill by acoustic emission parameters was carried out by acoustic emission probability density fuction.It can be seen that the addition of ballast can effectively slow down and inhibit pre-injury by contrast damage variable-stress level curve,when the ballast content is 20%,the best results can be achieved.

参考文献

[1] Tao Ganqiang,Sun Bing,Song Lixia,et al.Optimal design of stope structural parameters using back-filling method[J].Journal of Mining and Safety Engineering,2009,26(4):460-464.[ 陶干强,孙冰,宋丽霞,等.充填法采场结构参数优化设计[J].采矿与安全工程学报,2009,26(4):460-464.]
[2] Liu Z X,Dang W G,He X Q,et al.Cancelling ore pillars in large-scale coastal gold deposit:A case study in Sanshandao gold mine,China[J].Transactions of Nonferrous Metals Society of China,2013,23(10):3046-3054.
[3] Zhang Qiang,Zhang Jixiong,Wu Xiaogang,et al.Roof gap rationality research of backfilling-coal mining hydraulic support[J].Journal of China Coal Society,2013,38(8):1325-1330.[张强,张吉雄,吴晓刚,等.固体充填采煤液压支架合理夯实离顶距研究[J].煤炭学报,2013,38(8):1325- 1330.]
[4] Ji Hongguang,Hou Zhaofei,Zhang Lei,et al.Acoustic emission character of loaded rock under load-unload disturbance[J].Journal of University of Science and Technology Beijing,2011,33(1):1-5.[纪洪广,侯昭飞,张磊,等.载荷岩石材料在加载—卸荷扰动作用下声发射特性[J].北京科技大学学报,2011,33(1):1-5.]
[5] Ji Hongguang,Zhang Tiansen,Cai Meifeng,et al.Experimental study on concrete damage by dynamic measurement of acoustic emission[J].Chinese Journal of Rock Mechanics and Engineering,2000,19(2):165-168.[纪洪广,张天森,蔡美峰,等.混凝土材料损伤的声发射动态检测试验研究[J].岩石力学与工程学报,2000,19(2):165-168.]
[6] Yuan R F,Li Y H.Theoretical and experimental analysis on the mechanism of the Kaiser effect of acoustic emission in brittle rocks[J].Journal of University of Science and Technology Beijing,2008,15(1):1-4.
[7] Tang C A,Xu X H.Evolution and propagation of material defects and Kaiser effect function[J].Journal of  Seismological Research,1990,13(2):203-213.
[8] Zhang Ming,Li Zhongkui,Yang Qiang,et al.A damage model and statistical analysis of acoustic emission for quasi-brittle materials[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(12):2493-2501.[张明,李仲奎,杨强,等.准脆性材料声发射的损伤模型及统计分析[J].岩石力学与工程学报,2006,25(12):2493-2501.]
[9] Zhu Hongping,Xu Wensheng,Chen Xiaoqiang,et al.Quantitative concrete-damage evaluation by acoustic emission information and rate-process theory[J].Engineering Mechanics,2008,25(1):186-191.[朱宏平,徐文胜,陈晓强,等.利用声发射信号与速率过程理论对混凝土损伤进行定量评估[J].工程力学,2008,25(1):186-191.]
[10] Chen Guoqing,Zhao Cong,Liu Hui,et al.Acoustic emission characteristics of rock bridge test under different stress paths[J].Chinese Journal of Rock Mechanics and Engineering,2016,35(9):1792-1804.[陈国庆,赵聪,刘辉,等.不同应力路径下岩桥试验的声发射特征研究[J].岩石力学与工程学报,2016,35(9):1792-1804.]
[11] Zhuo Yulong,Chen Chen,Cao Shirong,et al.Effects of ballast on strength characteristics and damage evolution of filling body[J].Gold Science and Technology,2016,24(3):76-80.[卓毓龙,陈辰,曹世荣,等.块石对充填体强度特性及损伤演化的影响[J].黄金科学技术,2016,24(3):76-80.]
[12] Zhuo Yulong,Han Jianwen,Chen Chen,et al.Acoustic emission expression of the influence of ballast on damage evolution of filling body[J].Gold Science and Technology,2016,24(4):96-100.[卓毓龙,韩建文,陈辰,等.块石对充填体损伤演化影响的声发射表征[J].黄金科学技术,2016,24(4):96-100.]
[13] Xu Wenbin,Wang Yunmin,Dang Peng,et al.Precursors to compression failure of cemented backfill mass based on the multiparameter method[J].Rock and Soil Mechanics,2016, 37(2):399-406.[徐文彬,王运敏,党鹏,等.胶结充填体压缩破坏前兆多参数表征[J].岩土力学,2016,37(2):399-406.]
[14] Lin Feng,Li Shulin,Xue Yunliang.Relationship between acoustic emission parameter and mechanics parameters damage degree of concrete material[J].Journal of Xiamen University(Natural Science),2010,49(4):526-530.[林峰,李庶林,薛云亮.混凝土材料声发射参数与力学参数及其损伤程度的关系[J].厦门大学学报(自然科学版),2010,49(4):526-530.]
[15] Dai S T,Labuz J F.Damage and failure analysis of brittle materials by acoustic emission[J].Journal of Materials in Civil Engineering,1997,9(4):200-205.

文章导航

/