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Damage Analysis of Soaking Gypsum and Safety Evaluation of Goaf: Based on Energy Dissipation Theory
https://orcid.org/http://orcid.org/0000-0001-6518-7767
Based on the theory of energy dissipation, the energy dissipation model of gypsum rock was established, and we analyzed the energy dissipation law of four stages (compaction stage, elastic stage, plastic stage, and failure stage) of gypsum rock failure process with different soaking time. The results show that: the energy of the system (total strain energy, releasable elastic strain energy and dissipative strain energy) changes dynamically. The total strain energy and releasable elastic strain energy decrease with the increase of soaking time. The growth rate is also negatively related to soaking time, while the dissipative strain energy is positively related to soaking time. Then, based on the geological characteristics and test data of gypsum mine in Northern Jiangsu Province, FLAC3D software was used to simulate the stability of goaf under natural and saturated conditions respectively. The simulation results show that the plastic area of goaf was not obvious and the stability was good under natural conditions. In the state of water saturation, most of the area was completely penetrated by the plastic area, the pillar was seriously unstable, which endangers the safety of the goaf.
Damage Analysis of Soaking Gypsum and Safety Evaluation of Goaf: Based on Energy Dissipation Theory
https://orcid.org/http://orcid.org/0000-0001-6518-7767
Based on the theory of energy dissipation, the energy dissipation model of gypsum rock was established, and we analyzed the energy dissipation law of four stages (compaction stage, elastic stage, plastic stage, and failure stage) of gypsum rock failure process with different soaking time. The results show that: the energy of the system (total strain energy, releasable elastic strain energy and dissipative strain energy) changes dynamically. The total strain energy and releasable elastic strain energy decrease with the increase of soaking time. The growth rate is also negatively related to soaking time, while the dissipative strain energy is positively related to soaking time. Then, based on the geological characteristics and test data of gypsum mine in Northern Jiangsu Province, FLAC3D software was used to simulate the stability of goaf under natural and saturated conditions respectively. The simulation results show that the plastic area of goaf was not obvious and the stability was good under natural conditions. In the state of water saturation, most of the area was completely penetrated by the plastic area, the pillar was seriously unstable, which endangers the safety of the goaf.
Damage Analysis of Soaking Gypsum and Safety Evaluation of Goaf: Based on Energy Dissipation Theory
https://orcid.org/http://orcid.org/0000-0001-6518-7767
Based on the theory of energy dissipation, the energy dissipation model of gypsum rock was established, and we analyzed the energy dissipation law of four stages (compaction stage, elastic stage, plastic stage, and failure stage) of gypsum rock failure process with different soaking time. The results show that: the energy of the system (total strain energy, releasable elastic strain energy and dissipative strain energy) changes dynamically. The total strain energy and releasable elastic strain energy decrease with the increase of soaking time. The growth rate is also negatively related to soaking time, while the dissipative strain energy is positively related to soaking time. Then, based on the geological characteristics and test data of gypsum mine in Northern Jiangsu Province, FLAC3D software was used to simulate the stability of goaf under natural and saturated conditions respectively. The simulation results show that the plastic area of goaf was not obvious and the stability was good under natural conditions. In the state of water saturation, most of the area was completely penetrated by the plastic area, the pillar was seriously unstable, which endangers the safety of the goaf.
Damage Analysis of Soaking Gypsum and Safety Evaluation of Goaf: Based on Energy Dissipation Theory
Geotech Geol Eng
Xu, Xiaoding (Autor:in) / Cui, Xuebin (Autor:in) / Liu, Xue (Autor:in) / Tang, Qiongqiong (Autor:in) / Zhang, Xiaohu (Autor:in) / Sun, Yanhua (Autor:in)
Geotechnical and Geological Engineering ; 38 ; 6177-6188
01.12.2020
12 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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