本文選題：巖溶區(qū)　切入點：尾礦庫　出處：《中國巖溶》2017年02期 　論文類型：期刊論文

【摘要】：巖溶區(qū)尾礦庫滲漏是礦山引發(fā)環(huán)境污染的主要途徑之一,其形成機理復(fù)雜、治理難度大,已成為礦業(yè)開發(fā)中的重大隱患。巖溶區(qū)尾礦庫滲漏是復(fù)雜的、多因素共同作用的結(jié)果。滲漏雖然受多種因素的影響,但其發(fā)生主要是由上部附加應(yīng)力作用、下部巖溶發(fā)育程度和地下水侵蝕(掏蝕)作用3個影響因素決定。文章在總結(jié)和分析前人研究的基礎(chǔ)上,結(jié)合北山鉛鋅礦尾礦庫最新調(diào)查成果,通過調(diào)查分析尾礦庫的地質(zhì)構(gòu)造、巖溶發(fā)育特征、工程地質(zhì)條件、水文地質(zhì)條件等因素,對影響尾礦庫滲漏的3個主要因素逐一分解,研究了深層與淺層滲漏的形成機理與破壞機制,結(jié)果表明尾砂堆積、高水頭壓力等產(chǎn)生的附加應(yīng)力導(dǎo)致了庫底巖土體支撐應(yīng)力的破壞,頻繁、大幅度的水位波動以及地下水侵蝕(掏蝕)作用產(chǎn)生的負(fù)壓效應(yīng)引發(fā)巖溶管道的連通,是導(dǎo)致尾礦庫滲漏的主要原因。通過螺栓堵塞技術(shù)、配制有機充填材料封堵滲漏通道、地下水引流、坡面防護等措施對滲漏區(qū)進行了治理,取得了較好的防滲效果。
[Abstract]:The leakage of tailings reservoir in karst area is one of the main ways to cause environmental pollution caused by mines. Its formation mechanism is complex and its treatment is difficult, which has become a major hidden danger in mining development. The leakage of tailings reservoir in karst area is complicated. Although the leakage is affected by many factors, it is mainly caused by the additional stress in the upper part. The degree of karst development in the lower part and the effect of groundwater erosion are determined by three factors. On the basis of summing up and analyzing the previous studies, this paper combines the latest investigation results of the tailings of Beishan lead-zinc mine. By investigating and analyzing the geological structure, karst development characteristics, engineering geological conditions and hydrogeological conditions of the tailings reservoir, the three main factors affecting the leakage of the tailings reservoir are decomposed one by one. The formation mechanism and failure mechanism of deep and shallow seepage are studied. The results show that the additional stress caused by tailings accumulation and high head pressure causes the failure of supporting stress of rock and soil mass at reservoir bottom frequently. The large fluctuation of water level and the negative pressure effect caused by groundwater erosion lead to the connection of karst pipeline, which is the main reason leading to the leakage of tailings reservoir. Through bolt plugging technology, organic filling materials are prepared to seal the leakage channel. Groundwater drainage, slope protection and other measures to control the leakage area, achieved a good seepage control effect.
【作者單位】： 中國有色桂林礦產(chǎn)地質(zhì)研究院有限公司;
【基金】：國家自然科學(xué)基金項目(51309055,11372078)
【分類號】：TV697.3

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