Study on stability of dam body of a newly built tailings reservoir in Gansu Province
In order to ensure that the dam stability of a newly built tailings pond in Gansu province meets the standard and there is no dam break risk during normal use,the finite element method and limit equilibrium method are used to analyze the dam stability of the newly built tailings pond,so as to guide enterprises to optimize the construction and management of the tailings pond and effectively prevent dam instability and dam break.In the seepage calculation,the infiltration line is determined by the finite element method,and the safety factors of six typical sections under normal working conditions,flood working conditions and special working conditions are obtained by the Swedish circular arc method and the simplified Bishop method.The results show that the safety coefficients of all sections of the tailings dam meet the requirements.The safety coefficients of the middle section(D)in the southeast of the tailings dam under normal working conditions are the least,and the safety coefficients of the section(A)calculated when the sand field in the northeast is mined to the design depth under flood conditions and special working conditions are the least.Compared with the backfilling in the sand field,the stability of the tailings dam can be improved effectively.
tailings reservoirdam break simulationrisk assessmentfinite element method
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