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Full-Text Articles in Geotechnical Engineering
Energy Evolution Of Unloading Confining Pressure And Dissipative Energy Damage Constitutive Model Of Coal-Rock Combination, Wen-Kai Ru, Shan-Chao Hu, Di-Yuan Li, Jin-Yin Ma, Chen-Xi Zhang, Ping-Kuang Luo, Hao Gong, Ao-Hui Zhou
Energy Evolution Of Unloading Confining Pressure And Dissipative Energy Damage Constitutive Model Of Coal-Rock Combination, Wen-Kai Ru, Shan-Chao Hu, Di-Yuan Li, Jin-Yin Ma, Chen-Xi Zhang, Ping-Kuang Luo, Hao Gong, Ao-Hui Zhou
Rock and Soil Mechanics
In coal mining, the excavation of a coal-rock roadway and a thin coal seam will inevitably cause radial unloading of the coal-rock combination system. The radial unloading phenomenon is often accompanied by the rapid accumulation and release of energy, so it is necessary to investigate the energy evolution law of coal-rock combination specimens under the unloading confining pressure condition. To this end, the unloading confining pressure tests with different unloading rates were carried out for the coal-rock combination specimens. The results show that: (1) The axial loading and constant stress stages are the main energy storage stages of the combination …
Meso-Structure Damage Evolution In Shear Bands Of Granite Residual Soil, Cheng-Sheng Li, Ling-Wei Kong, Rong-Jun Shu, Zhi-Jun Liu, Bing-Xin Zhang
Meso-Structure Damage Evolution In Shear Bands Of Granite Residual Soil, Cheng-Sheng Li, Ling-Wei Kong, Rong-Jun Shu, Zhi-Jun Liu, Bing-Xin Zhang
Rock and Soil Mechanics
Shear band and crack evolution are very important for landslides. Crack is the weakest area in soil, and there is a lack of effective methods to analyze the meso-structure damage in shear bands quantitatively. To reveal the influence of cracks in granite residual soil on shear deformation and failure, CT scanning was used to obtain volume images of the sample at different loading stages during triaxial loading. Based on the digital volume correlation (DVC) method, a crack classification method is established according to the connectivity characteristics of cracks before and after loading. The cracks can be divided into eight kinds: …