本文選題：采礦工程 + 細粒尾礦��； 參考：《巖石力學與工程學報》2017年05期

【摘要】：核桃箐尾礦庫位于中甸—大理地震帶,其抗震設防烈度為8度,且入庫尾礦為細粒尾礦。為論證其采用上游式工藝進行筑壩的可行性,綜合運用堆壩模型試驗、土工測試、理論分析和數(shù)值模擬等多種方法,對其動力反應與靜、動力穩(wěn)定性進行了系統(tǒng)研究。結果表明,通過高筑初期壩、合理設置排滲設施并增設塊石貼坡,可以使核桃箐尾礦庫尾礦壩的靜、動力穩(wěn)定性達到規(guī)范要求,從理論上證明了通過采取合適的抗震措施,在8度地震區(qū)的細粒尾礦庫采用上游法筑壩是可行的。研究中還發(fā)現(xiàn),由于動孔隙水壓力的產(chǎn)生和增長,尾礦壩的動力安全系數(shù)在地震過程中呈波動下降的趨勢。較大的永久變形是細粒尾礦堆壩的主要震害形式之一,當干灘面長度和安全超高不足時,震后容易發(fā)生漫壩事故。并從細觀角度,對細粒尾礦堆壩顆粒分級不明顯、浸潤線埋深淺、灘面坡度緩等特點的成因進行了分析。
[Abstract]:Juuqing tailing reservoir is located in the Zhongdian-Dali seismic belt, its seismic fortification intensity is 8 degrees, and the tailings into the reservoir are fine tailing. In order to prove the feasibility of dam construction with upstream technology, the dynamic response, static and dynamic stability of the dam were studied systematically by using various methods, such as dam model test, geotechnical test, theoretical analysis and numerical simulation. The results show that the static and dynamic stability of the tailings dam of Juuqing tailing reservoir can be achieved by setting up the seepage drainage facilities reasonably and adding the block slope at the initial stage of the dam. It is proved theoretically that appropriate anti-seismic measures can be taken to ensure the static and dynamic stability of the tailings dam in Juuqing tailing reservoir. It is feasible to use upstream method to dam the fine tailing reservoir in 8 degree earthquake area. It is also found that the dynamic safety factor of tailings dam fluctuates and decreases during the earthquake due to the generation and increase of dynamic pore water pressure. Large permanent deformation is one of the main seismic damage forms of fine tailing dam. When the length of dry beach surface and the safety of super-high are insufficient, the dam overrun is easy to occur after the earthquake. From the point of view of meso, the causes of the characteristics of fine tailing dam are analyzed, such as the grain classification is not obvious, the depth of infiltration line is shallow, the beach slope is slow, and so on.
【作者單位】： 重慶大學煤礦災害動力學與控制國家重點實驗室;重慶大學資源及環(huán)境科學學院;重慶科技學院安全工程學院;東京大學土木工程系;
【基金】：國家自然科學基金資助項目(51404049)~~
【分類號】：TD926.4
，

本文編號：2108426