【摘要】 以湖南某铜矿所属尾矿库加高扩容工程为例,采用物探高密度电阻率法对尾矿库区场地内可能存在的岩溶发育地段及影响范围进行了测量,得到了尾矿库库区范围内的岩溶分布情况。依据设计的尾矿库加高扩容方案,采用FLAC3D数值分析了尾矿库加高扩容工程与库区范围内岩溶的相互影响。分析结果表明:设计采用的上游式加高方案对底部岩溶区的稳定性影响较小,库区范围内的岩溶发育区对尾矿库加高扩容工程坝体影响较小,并提出了对岩溶发育区岩溶漏斗的封堵措施,对岩溶发育区采取防渗措施,通过研究论证了尾矿库加高扩容方案的可行性,为尾矿库加高扩容工程的设计及今后的运行指导性的建议。更多还原

【Abstract】 Taking the heightening and expansion project of tailing reservoir belonging to a copper mine in Hunan as a case,the geophysical prospecting high-density resistivity method was used to investigate the potential karst development areas and their impact areas in the tailings reservoir site. The karst distribution within the tailings reservoir area was obtained.According to the heightening and expansion design of the tailings reservoir,the FLAC3 Dnumerical analysis was used to analyze the interaction between the heightening of the tailings reservoir and the karst within the reservoir area. The analysis results showed that the upstream heightening scheme has little impact on the stability of the karst area at the bottom and the karst development area within the reservoir area has little impact on the heightening and expansion project of the tailing pond.Some measures to block karst funnels in the karst development area was put forward and the related anti-seepage measures were proposed. Through the research,the feasibility of the heightening program for tailing ponds has been demonstrated,which provides guidance for designing the heightening and expansion project of tailings pond in future.更多还原