文献类型：期刊文献

英文题名：Study on compaction characteristics and mechanical model of dry crushing filling material under lateral confinement condition

作者：Xu, Youlin Wu, Shaokang Chen, Zhisong Wu, Xukun Zhang, Jitao Xiao, Bing

第一作者：徐佑林

通信作者：Wu, SK[1];Wu, SK[2]

机构：[1]Guizhou Inst Technol, Sch Min Engn, Guiyang 550003, Guizhou, Peoples R China;[2]China Univ Min & Technol Beijing, Sch Energy & Min Engn, Beijing 100083, Peoples R China;[3]Guizhou Univ, Sch Min, Guiyang 550025, Guizhou, Peoples R China;[4]Anhui Univ Sci & Technol, Sch Min Engn, Huainan 232001, Anhui, Peoples R China;[5]Guizhou Qianchenglijin Technol Co Ltd, Guiyang 550081, Guizhou, Peoples R China;[6]Hunan Univ Sci & Technol, Sch Resource & Environm & Safety Engn, Xiangtan 411201, Peoples R China

第一机构：贵州理工学院矿业工程学院

通信机构：corresponding author), Guizhou Inst Technol, Sch Min Engn, Guiyang 550003, Guizhou, Peoples R China;corresponding author), China Univ Min & Technol Beijing, Sch Energy & Min Engn, Beijing 100083, Peoples R China.|贵州理工学院矿业工程学院;贵州理工学院;

年份：2024

卷号：14

期号：1

外文期刊名：SCIENTIFIC REPORTS

收录：;Scopus(收录号：2-s2.0-85197199097);WOS:【SCI-EXPANDED(收录号:WOS:001258865400011)】；

基金：This study was supported by the National Natural Science Foundation of China (51764010, 51874109), Guizhou Science and Technology Support Plan (General Project) in 2023 (Guizhou Science and Technology Support [2023] General 305) and the Graduate Innovation Fund of Anhui University of Science and Technology (No. 2022CX1004).

语种：英文

外文关键词：Goaf; Dry filling material; Compaction characteristics; Load-bearing performance; Talbot coefficient; Acoustic emission

摘要：The compaction characteristics and bearing capacity of dry filling materials in goaf have a significant influence on stope control and surface stability. Through acoustic emission monitoring and mechanical model analysis, a series of confined compression tests were conducted on crushed waste with varying particle sizes and Talbot coefficients. The deformation, fragmentation, and acoustic emission characteristics under corresponding working conditions were determined. The results indicate that the stress-strain curves of crushed stone with different particle sizes and Talbot coefficients exhibit similar nonlinear behavior during confined compression. However, the strain response varies with changing stress levels. By analyzing the slope change rate of the stress-strain curve, the lateral uniaxial compression process of waste rock can be divided into three deformation stages: rapid compression, stable crushing, and slow compaction. The compressive deformation characteristics of gravel differ based on particle size and Talbot coefficient. Specimens with a higher Talbot coefficient demonstrate stronger compressive resistance and weaker deformation resistance during initial compaction loading. Notably, the internal pressure structure strength is influenced by factors such as maximum particle size D, grading coefficient n, and particle size distribution continuity, rather than solely by the proportion of large particles. The evolution of acoustic emission signals and energy-time curve during waste rock confined axial compression synchronizes with the compaction process. Overall, compaction plays a critical role in maintaining the stability of goaf in dry crushed waste filling.