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Article
Mechanics
Kang Zhao et al.
Summary: The spatial localization of damage evolution caused by fiber-reinforced backfill is critical for predicting rupture location in mining area filling. Through AE three-dimensional localization tests, the damage evolution process and characteristics of fiber-reinforced backfills were studied. The evolution of spatial distribution of AE events not only reflects the spatial location of damage during the loading process but also determines the degree of damage at a certain location based on spatial point density. These results provide a theoretical basis for predicting rupture localization in mine filling.
COMPOSITE STRUCTURES
(2023)
Article
Construction & Building Technology
Dong Geon Son et al.
Summary: This study investigates the shear strength characteristics of a two-layer geotextile reinforced with a flowable fill by comparing three types of geotextiles and a flowable fill. The experimental results show that reinforced geotextiles have higher peak and residual shear strengths compared to unreinforced geotextiles. The peak shear strength is significantly influenced by the warp/weft density and crossing-over firmness factor of the reinforced geotextile, as well as the curing period. The weave structure parameters affect the peak friction angles of both reinforced and unreinforced geotextiles cured for 28 days.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Wei He et al.
Summary: This study investigated the effect of polypropylene (PP) fibers on the properties of modified magnesium-coal-based solid waste backfill materials (MFPB). It was found that increasing the content and length of PP fibers reduced the flowability of MFPB but significantly increased its strength. The permeability of MFPB initially decreased and then increased with the presence of PP fibers. The network structure formed by the PP fibers enhanced the strength and toughness of MFPB. This study provides valuable insights for the application of PP fibers in backfill mining.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Computer Science, Interdisciplinary Applications
Liming Zhang et al.
Summary: The creep characteristics of rocks have a direct impact on the long-term safety of deep rock mass engineering. In this study, a memory-dependent derivative creep (MDDC) model with four single elements is proposed based on the memory-dependent (M-D) derivative theory. The one-dimensional MDDC model is extended to a three-dimensional model according to the generalized plastic mechanics theory. The MDDC model shows the highest accuracy and widest applicability in characterizing the creep of rocks and soils under different stress paths, and it can describe the creep at the nonlinear accelerated creep stage without impacting the memory effect over time, making it superior to the element combination model and the fractional model.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Geochemistry & Geophysics
Lei Zhu et al.
Summary: This study aims to predict the tensile strength of glass fiber-modified cemented backfill materials (GFCBM) using four artificial intelligence models. The results indicate that the ABC-SVM model has the highest prediction ability, which can promote the application of cemented backfill coal mining technology.
Article
Geochemistry & Geophysics
Qian Jia et al.
Summary: This study focuses on the influence of mining pressure on borehole stress gauge data in roadways in different strata of Xieqiao Mine. The research findings indicate that mining increases vertical and horizontal stress, and the buried depth of the roadway affects the range of mining influence and stress increment. Furthermore, after roadway excavation, surface deformation of surrounding rock reduces the increase of mining stress, which is crucial for roadway support design and advanced support design of the working face.
Article
Chemistry, Multidisciplinary
Jiaren Chen et al.
Summary: This study is significant for understanding the development pattern of the plastic zone and stress distribution of a layered surrounding rock in a roadway (tunnel). The research results provide important references for roadway support and design of surrounding rock support schemes. The experimental and numerical simulation results reveal the deformation characteristics and stress distribution of the layered surrounding rock, aiding in the control and understanding of the behavior of a layered inclined rock roadway.
APPLIED SCIENCES-BASEL
(2022)
Article
Construction & Building Technology
Jian Yang et al.
Summary: The fracture evolution characteristics of fiber-reinforced backfill were explored through the analysis of amplitude correlation dimension, RA correlation dimension, and time of acoustic emission. The study found that the fiber-reinforced backfill exhibits good fractal characteristics, with the amplitude time series showing better fractal properties compared to the RA time series.
CEMENT & CONCRETE COMPOSITES
(2022)
Article
Engineering, Geological
Liming Zhang et al.
Summary: Triaxial loading and unloading tests on marble specimens revealed different failure patterns and energy storage limits under various stress paths. A nonlinear energy evolution model of rocks accurately predicts critical strain for rock failure.
