Energy evolution and structural health monitoring of coal under different failure modes:An experimental study

作     者：Yarong Xue Xueqiu He Dazhao Song Zhenlei Li Majid Khan Taoping Zhong Fei Yang Yarong Xue;Xueqiu He;Dazhao Song;Zhenlei Li;Majid Khan;Taoping Zhong;Fei Yang

作者机构：School of Civil and Resources EngineeringUniversity of Science and Technology BeijingBeijing 100083China Zhong-an Academy of Safety EngineeringBeijing 100083China 

出 版 物：《International Journal of Minerals,Metallurgy and Materials》 (矿物冶金与材料学报（英文版）)

年 卷 期：2024年第31卷第5期

页      面：917-928页

核心收录：

学科分类：081901[工学-采矿工程] 0819[工学-矿业工程] 08[工学] 

基　　金：financially supported by the National Natural Science Foundation of China(Nos.52011530037 and 51904019) 

主　　题：energy dissipation structural health monitoring early warning coal-rock mechanics failure mode 

摘      要：Structural instability in underground engineering,especially in coal-rock structures,poses significant safety ***,the development of an accurate monitoring method for the health of coal-rock bodies is *** focus of this work is on understanding energy evolution patterns in coal-rock bodies under complex conditions by using shear,splitting,and uniaxial compression *** examine the changes in energy parameters during various loading stages and the effects of various failure modes,resulting in an innovative energy dissipation-based health evaluation technique for *** results show that coal bodies go through transitions between strain hardening and softening mechanisms during loading,indicated by fluctuations in elastic energy and dissipation energy *** tensile failure,the energy profile of coal shows a pattern of “high dissipation and low accumulation before peak *** the other hand,shear failure is described by “high accumulation and low dissipation in energy *** failure modes correlate with an accelerated increase in the dissipation energy before destabilization,and a significant positive correlation is present between the energy dissipation rate and the stress state of the coal samples.A novel mathematical and statistical approach is developed,establishing a dissipation energy anomaly index,W,which categorizes the structural health of coal into different danger *** method provides a quantitative standard for early warning systems and is adaptable for monitoring structural health in complex underground engineering environments,contributing to the development of structural health monitoring technology.