Typical Geo-Hazards and Countermeasures of Mines in Yunnan Province, Southwest China

World Multidisciplinary Earth Sciences Symposium 2016

Cheng, Xianfeng^1,2 ; Qi, Wufu^2 ; Huang, Qianrui^2 ; Zhao, Xueqiong^2 ; Fang, Rong^2 ; Xu, Jun^2

China University of Geosciences, Beijing

100083, China^1

Yunnan Land and Resources Vocational College, Yangzonghai Scenic Area, Yunnan Province, Kunming

652501, China^2

关键词: Ecological remediation;    Engineering treatment;    High frequency HF;    High sliding speed;    Mining activities;    Southwest China;    Very low frequency;    Yunnan province;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/44/2/022008/pdf
DOI  :  10.1088/1755-1315/44/2/022008

来源: IOP

【 摘 要 】

Mining-induced geo-hazards have caused enormous destruction and threat to mines. Known as the "kingdom of nonferrous metals" and located in Southwest China, Yunnan Province developed mining-induced geo-hazards well with characteristics of multiple types, widespread distribution and serious damage. Landslides and debris flows are two common sub-types of geohazards causing most serious damage in Yunnan, and some of them were very representative in the world. Two landslides and two debris flows were chosen to analyze deeply. Both Laojinshan Landslide and Sunjiaqing Landslide possess the characteristic of rock avalanches. The high sliding speed and long distance made the landslides translate into clastic flows with impact force and caused enormous destruction. Rainstorm and mining waste rock were two main factors to induce debris flows in Yunnan mines. Heishan valley debris flow of Dongchuan copper mine was a super large rainstorm type viscose debris flow with very low frequency, which brought a good caution to utilize valleys which looked an unlikely debris flow. Nandagou Valley of Jinding lead-zinc mine in Lanping County was a rainstorm stimulating, gully-type, high frequency and large scale debris flow, which was induced by mining activities. Many countermeasures have been used for Yunnan mines, including engineering treatment technology and ecological remediation, monitoring and forecasting, relocation and public administration.