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首页   >    采矿工程

养护温度对胶结充填体力学特性的影响试验研究

  • 白丽伟|赵润康|屈春来|唐志新|王洋|吴迪
  • 作者单位:
  • 中色紫金地质勘查(北京)有限责任公司|北京航空航天大学交通科学与工程学院|河北工程大学水利水电学院|哈密红石矿业有限公司|哈密红石矿业有限公司|北京科技大学土木与资源工程学院
  • 基金项目:

  • 河北省高等学校科学技术研究项目(BJ2019023);新疆维吾尔自治区高层次人才引进工程(新党办发〔2012〕16号)
  • 详细信息:

  • 作者简介:
  • 白丽伟(1982—),女,山西方山人,工程师,硕士,从事矿业项目资源评估与并购工作;北京市朝阳区北苑大羊坊有色地质大厦807,中色紫金地质勘查(北京)有限责任公司,100012;E-mail:bailw001@163.com
  • 通讯作者:
  • E-mail:DiWu1218@ustb.edu.cn,18710162586
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Experimental research on the influence of curing temperature on the mechanical properties of cemented filling body

  • English Author:
  • NFC Zijin Geological Exploration(Beijing)Co.,Ltd.|School of Transportation Science and Engineering BUAA|School of Water Conservancy and Hydroelectric Power,HUE|Hami Hongshi Mining Industry Co.,Ltd.|Hami Hongshi Mining Industry Co.,Ltd.|School of Civil and Resource Engineering,Beijing University of Science and Technology
  • Unit:
  • 摘要
  • 在线预览
  • 参考文献

摘要:

利用岩石力学试验系统和声发射信号采集系统,获得了不同养护龄期(1 d、3 d、7 d)的煤矸石-粉煤灰胶结充填体试件在不同养护温度(20 ℃、50 ℃、75 ℃、90 ℃)下声发射演化规律及声发射特征参量与应力-应变曲线之间的关系。研究表明:同一龄期条件下,养护温度越高,试件的应力-应变曲线初期切线模量越小;在一定范围内提高养护温度,试件的声发射数峰值会随着试件抗压强度的增加而增大,这说明声发射信号变化与试件内部结构破坏程度、抗压强度变化之间存在着较强的关联性,如应力达到峰值,声发射数也达到峰值,由此可以根据声发射信号的变化来判断试件何时失稳破坏。

关键词:

胶结充填体;声发射;养护龄期;养护温度;力学特性

Abstract:

The rock mechanical test system and acoustic emission signal collection system are used,obtaining the acoustic emission evolution rules and the relation between acoustic emission characteristic parameters and stress-stress strain curve of the test specimen,a gangue-coal ash cemented filling body,with different curing period1 d,3 d,7 dunder different curing temperatures(20 ,50 ,75 ,90 ).The research shows that with the same curing period,the initial tangent modulus of test specimen stress-stress strain curve decreases with higher curing temperature;the acoustic emission number peak of the test specimen increases with the strength of the specimen when the curing temperature increases in certain range,which indicates relatively close correlation between the acoustic emission signal variation and the damage degree and compressive strength variation of the internal structure of the specimen,for example the acoustic emission number reaches the peak when the stress reaches the peak.Thus,the time of failure and damage of the test specimen can be judged based on the acoustic emission signal.

Keywords:

cemented filling body;acoustic emission;curing period;curing temperature;mechanical property