Monitoring and Analysis of Dynamic Response for Open-Pit Mine with Inside Inclined Shafts under Train Loading

Metals

Zhong-Xin Wang¹  Ke Ma¹  Xiao-Jun Li¹  Yong Wang¹  Hong Zhang¹  Song-Tao Ni²  Fa-Wu Yang³ 

[1] CCTEG Shenyang Engineering Co., Ltd., Shenyang 110000, China;College of Civil and Transportation Engineering, Hohai University, Nanjing 210098, China;Laohutai Mine of Fushun Mining Group Co., Ltd., Fushun 113000, China;

关键词: open-pit mine;    PLAXIS 3D;    dynamic load;    safety factor;    acceleration;   

DOI  :  10.3390/met11111681

来源: DOAJ

【 摘 要 】

The stability of open-pit mining is a hot issue in geotechnical engineering. A mining railroad is in operation on the slope where the east exhaust inclined shaft and the east sand injection inclined shaft on the Laohutai Mine are located, and it was necessary to determine whether railroad vibration would have an impact on the safety of the inclined shafts. With this project as the background, the dynamic response of the slope with inside two inclined shafts was conducted under train loading. A three-dimensional numerical model by using PLAXIS 3D was established to analyze the stability of the slope. The results show that the dynamic reaction caused by the full-loaded train is significantly greater than the no-load train. The safety factor of the slope under the dynamic load is 1.201, and the maximum displacement of the slope which occurred in the gravel layer directly beneath the train track is about 5 mm. The acceleration responses of the two inclined shafts are almost consistent. The maximum horizontal and vertical acceleration occur at the epidote weak layer. The acceleration directly below the load increases significantly. Therefore, it can be considered that the slopes are stable under the action of train vibration, and the influence on the two inclined shafts is small and negligible.

【 授权许可】

Unknown