Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Support characteristics of flexible negative Poisson’s ratio anchor cable response to blasting impacts
With the gradual decrease and exhaustion of shallow mineral resources, underground mining has progressed to greater depths. Here, the geological environment is significantly more complex and nonlinear, and large deformations of rock masses have great potential to occur. Many geotechnical engineering disasters have occurred even while using Poisson’s ratio (PR) anchor cable supports. To efficiently deal with these issues, a new support material called negative Poisson’s ratio (NPR) anchor cable is proposed; this material can withstand large deformations and provide high constant resistance. In this study, the support characteristics of macro-NPR anchor cable under blasting impact were mainly studied. The support effects of PR anchor cable and macro-NPR anchor cable were compared and analyzed with the help of field experiments and numerical simulations. The results indicate that field experiments and discontinuous deformation analysis accurately reflect the failure state of the selected roadway, as well as the tension and deformation of the anchor cables. The roadway supported by PR anchor cables cannot resist rock bursts under ordinary circumstances. However, the NPR anchor cable-supported roadway resisted a rock burst caused by the impact equivalent to a mine earthquake magnitude above 3; it meets the requirements of roadway stability.
Support characteristics of flexible negative Poisson’s ratio anchor cable response to blasting impacts
With the gradual decrease and exhaustion of shallow mineral resources, underground mining has progressed to greater depths. Here, the geological environment is significantly more complex and nonlinear, and large deformations of rock masses have great potential to occur. Many geotechnical engineering disasters have occurred even while using Poisson’s ratio (PR) anchor cable supports. To efficiently deal with these issues, a new support material called negative Poisson’s ratio (NPR) anchor cable is proposed; this material can withstand large deformations and provide high constant resistance. In this study, the support characteristics of macro-NPR anchor cable under blasting impact were mainly studied. The support effects of PR anchor cable and macro-NPR anchor cable were compared and analyzed with the help of field experiments and numerical simulations. The results indicate that field experiments and discontinuous deformation analysis accurately reflect the failure state of the selected roadway, as well as the tension and deformation of the anchor cables. The roadway supported by PR anchor cables cannot resist rock bursts under ordinary circumstances. However, the NPR anchor cable-supported roadway resisted a rock burst caused by the impact equivalent to a mine earthquake magnitude above 3; it meets the requirements of roadway stability.
Support characteristics of flexible negative Poisson’s ratio anchor cable response to blasting impacts
Xiaojie Yang (Autor:in) / Wei Ming (Autor:in) / Wenjun Gong (Autor:in) / Yuefeng Pan (Autor:in) / Manchao He (Autor:in) / Zhigang Tao (Autor:in)
2023
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
Metadata by DOAJ is licensed under CC BY-SA 1.0
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