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Experimental Study on Energy Damage Evolution Characteristics of Filling Specimens with Different Sizes Under Uniaxial Compression
Received date: 2022-02-16
Revised date: 2022-04-13
Online published: 2022-10-31
The indoor uniaxial compression tests were carried out on four filling specimens with different sizes of 40 mm，70.7 mm，100 mm and 150 mm.The effects of size changes on the energy evolution law and damage mechanism of filling were studied，and the precursory criterion of filling body failure based on elastic energy consumption ratio was obtained.The results show that the energy evolution laws of different sizes of fillings under uniaxial compression are similar，which are reflected in that the elastic strain energy is mainly accumulated before the peak stress，the energy is released and dissipated during the failure process of the specimen，the curve of dissipated energy and elastic energy shows an alternating growth trend，and the proportion of dissipated energy increases continuously and exceeds the elastic strain energy rapidly after the peak stress.With the increase of specimen size，the total input strain energy，elastic strain energy and dissipation energy of the filling body at the peak stress show a nonlinear downward trend，indicating that the energy storage limit and bearing capacity of the filling body are decreasing with the increase of specimen size.The dissipative energy characteristics of the filling body can better reflect the four stages of damage evolution in the filling body.In the initial damage stage and the stable development stage of damage，the variation range of the dissipation energy curves of the sample with the size of 40 mm is slightly larger than that of the sample with other sizes.In the stage of damage acceleration and damage failure，the corresponding curves of 40 mm and 70.7 mm samples and 100 mm and 150 mm samples show two different growth trends.The smaller the size is，the more severe the damage is.The larger the size of the filling specimen is，the greater the change range of the elastic energy consumption ratio K value of the specimen is.The elastic energy consumption ratio K value curve increases first and then decreases，continues to a low value，and then increases near the peak stress.This variation law of K value curve of elastic energy consumption ratio can be used as the precursory characteristic of critical failure of filling body.
Kui ZHAO , Zhouchao LIU , Peng ZENG , Cong GONG . Experimental Study on Energy Damage Evolution Characteristics of Filling Specimens with Different Sizes Under Uniaxial Compression[J]. Gold Science and Technology, 2022 , 30(4) : 540 -549 . DOI: 10.11872/j.issn.1005-2518.2022.04.026
http://www.goldsci.ac.cn/article/2022/1005-2518/1005-2518-2022-30-4-540.shtml
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|
|
甘德清，韩亮，刘志义，等，2018.胶结充填体抗压强度尺寸效应的试验研究［J］.金属矿山，47（1）：32-36.
|
|
高玮，汪磊，杨大勇，2011.岩石损伤演化的能量方法研究［J］.岩石力学与工程学报，30（增2）：4087-4092.
|
|
郭育霞，赵永辉，冯国瑞，等，2021.矸石胶结充填体单轴压缩损伤破坏尺寸效应研究［J］.岩石力学与工程学报，40（12）：2434-2444.
|
|
侯永强，尹升华，曹永，等，2020a.不同加载速率下胶结充填体损伤特性与能量耗散特征分析［J］.湖南大学学报（自然科学版），47（8）：108-117.
|
|
侯永强，尹升华，曹永，等，2020b.单轴压缩下不同养护龄期尾砂胶结充填体损伤特性及能量耗散分析［J］.中南大学学报（自然科学版），51（7）：1955-1965.
|
|
靳少博，刘科伟，黄进，等，2021.单轴压缩下充填体损伤本构模型研究［J］.黄金科学技术，29（4）：555-563.
|
|
李天斌，陈子全，陈国庆，等，2015.不同含水率作用下砂岩的能量机制研究［J］.岩土力学，36（增2）：229-236.
|
|
李子运，吴光，黄天柱，等，2018.三轴循环荷载作用下页岩能量演化规律及强度失效判据研究［J］.岩石力学与工程学报，37（3）：662-670.
|
|
卢蓉，马凤山，赵杰，等，2021.充填体室内单轴压缩试验声发射指标特性分析［J］.黄金科学技术，29（2）：218-225.
|
|
潘鹏志，周辉，冯夏庭，2008.加载条件对不同尺寸岩石单轴压缩破裂过程的影响研究［J］.岩石力学与工程学报，27（增2）：3636-3642.
|
|
谢和平，鞠杨，黎立云，2005.基于能量耗散与释放原理的岩石强度与整体破坏准则［J］.岩石力学与工程学报，24（17）：3003-3010.
|
|
谢和平，彭瑞东，鞠杨，2004.岩石变形破坏过程中的能量耗散分析［J］.岩石力学与工程学报，23（21）：3565-3570.
|
|
徐文彬，宋卫东，王东旭，等，2014.三轴压缩条件下胶结充填体能量耗散特征分析［J］.中国矿业大学学报，43（5）：808-814.
|
|
尹升华，侯永强，杨世兴，等，2021.单轴压缩下混合集料胶结充填体变形破坏及能耗特征分析［J］.中南大学学报（自然科学版），52（3）：936-947.
|
|
张志镇，2013.岩石变形破坏过程中的能量演化机制［D］.徐州：中国矿业大学.
|
|
赵奎，谢文健，曾鹏，等，2020a.不同浓度的尾砂胶结充填体破坏过程声发射特性试验研究［J］.应用声学，39（4）：543-549.
|
|
赵奎，卓毓龙，曾鹏，等，2020b.下向分层胶结充填开采中的协同性［J］.金属矿山，49（5）：19-25.
|
/
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|
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