本文選題：采礦工程 + 細(xì)粒尾礦��； 參考：《巖石力學(xué)與工程學(xué)報(bào)》2017年05期

【摘要】：核桃箐尾礦庫(kù)位于中甸—大理地震帶,其抗震設(shè)防烈度為8度,且入庫(kù)尾礦為細(xì)粒尾礦。為論證其采用上游式工藝進(jìn)行筑壩的可行性,綜合運(yùn)用堆壩模型試驗(yàn)、土工測(cè)試、理論分析和數(shù)值模擬等多種方法,對(duì)其動(dòng)力反應(yīng)與靜、動(dòng)力穩(wěn)定性進(jìn)行了系統(tǒng)研究。結(jié)果表明,通過(guò)高筑初期壩、合理設(shè)置排滲設(shè)施并增設(shè)塊石貼坡,可以使核桃箐尾礦庫(kù)尾礦壩的靜、動(dòng)力穩(wěn)定性達(dá)到規(guī)范要求,從理論上證明了通過(guò)采取合適的抗震措施,在8度地震區(qū)的細(xì)粒尾礦庫(kù)采用上游法筑壩是可行的。研究中還發(fā)現(xiàn),由于動(dòng)孔隙水壓力的產(chǎn)生和增長(zhǎng),尾礦壩的動(dòng)力安全系數(shù)在地震過(guò)程中呈波動(dòng)下降的趨勢(shì)。較大的永久變形是細(xì)粒尾礦堆壩的主要震害形式之一,當(dāng)干灘面長(zhǎng)度和安全超高不足時(shí),震后容易發(fā)生漫壩事故。并從細(xì)觀角度,對(duì)細(xì)粒尾礦堆壩顆粒分級(jí)不明顯、浸潤(rùn)線(xiàn)埋深淺、灘面坡度緩等特點(diǎn)的成因進(jìn)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(xué)煤礦災(zāi)害動(dòng)力學(xué)與控制國(guó)家重點(diǎn)實(shí)驗(yàn)室;重慶大學(xué)資源及環(huán)境科學(xué)學(xué)院;重慶科技學(xué)院安全工程學(xué)院;東京大學(xué)土木工程系;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51404049)~~
【分類(lèi)號(hào)】：TD926.4
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本文編號(hào)：2108426