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- W3208955712 abstract "Based on PIV technology,the single-through fractured rock mass specimens were prefabricated by similar materials and compression-shear failure tests were carried out to explore the influence of fracture aperture on the strength,deformation and failure process. The results show that: (1)When the initial fracture occurs,the stress of the test group with different fracture apertures decreases obviously. The plastic deformation of the hinged part of the fractured rock mass increases with the increase of the aperture. The characteristic stress value of the rock mass specimen decreases; (2)The fracture aperture affects the proportion of the deformation of the fracture and the hinge part in the total deformation of the specimen,thereby affecting the axial peak strain and the lateral peak strain of the fractured specimen. The larger the fracture aperture is,the smaller the axial peak strain and the lateral peak strain of the fractured specimen are; (3)By PIV monitoring,it is found that the initial fracture position of the specimen transfers from the middle and lower parts to the middle and upper parts with the increase of aperture degree. The specimen gradually changes from tensile shear composite failure to single shear failure; (4)Through the analysis of displacement contour pictures,it is found that the surface of the specimen needs to reach the displacement threshold k to produce cracks,and the increase of the prefabricated crack aperture will reduce the displacement threshold k of the specimen. The results provide basis for the investigation of the mechanism of water and sand mixture inrush in deep mines." @default.
- W3208955712 created "2021-11-08" @default.
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- W3208955712 date "2021-09-03" @default.
- W3208955712 modified "2023-09-28" @default.
- W3208955712 title "PIV TECHNOLOGY BASED EXPERIMENT FOR COMPRESSION-SHEAR FAILURE CHARACTERISTICS OF CONNECTED FISSURE ROCK MASS" @default.
- W3208955712 doi "https://doi.org/10.13544/j.cnki.jeg.2021-0334" @default.
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