【摘要】：贛南稀土礦山資源豐富,資源具有配分全、有價(jià)元素含量高、礦體埋藏淺、原礦放射性比度低等特點(diǎn),探明儲(chǔ)量居全國之首。近幾十年來,人們對稀土無序的開采引發(fā)了大規(guī)模的滑坡災(zāi)害,開采過程中人員及設(shè)備的安全嚴(yán)重受到威脅,因此,對稀土礦山滑坡危險(xiǎn)性評價(jià)及防治研究對維護(hù)人民群眾的生命財(cái)產(chǎn)安全具有重要意義。論文結(jié)合對研究區(qū)展開的調(diào)查分析,通過ARCGIS軟件建立數(shù)字高程模型,運(yùn)用層次分析法計(jì)算權(quán)重,并結(jié)合加權(quán)信息量模型對研究區(qū)進(jìn)行滑坡危險(xiǎn)性區(qū)劃,確定高危險(xiǎn)等級區(qū)域,分析高危區(qū)影響因素并利用geostudio軟件模擬特定條件下邊坡穩(wěn)定性系數(shù)的變化,提出滑坡防治建議,主要結(jié)論如下:1.結(jié)合野外實(shí)際調(diào)查資料與遙感影像對研究區(qū)滑坡影響因素進(jìn)行分析,為研究區(qū)滑坡危險(xiǎn)性評價(jià)因子選取提供依據(jù)。2.根據(jù)研究區(qū)工程地質(zhì)條件,選取坡度、坡向、高程、原地浸礦區(qū)、池浸堆浸區(qū)、居民區(qū)與未擾動(dòng)坡體作為評價(jià)因子,選用層次分析法與加權(quán)信息量模型并運(yùn)用arcgis空間分析功能進(jìn)行滑坡危險(xiǎn)性分區(qū),將研究區(qū)危險(xiǎn)等級分為高、中、低三類,其中高危險(xiǎn)區(qū)占總面積的15.24%,中危險(xiǎn)區(qū)占41.49%,低危險(xiǎn)區(qū)占43.27%。3.針對滑坡高危險(xiǎn)區(qū),分析各要素引發(fā)滑坡的機(jī)理,結(jié)合實(shí)際工藝流程,運(yùn)用geostudio軟件輔助分析,提出滑坡預(yù)防建議。4.針對尾砂堆,選取生態(tài)恢復(fù)的防治措施;針對采用原地浸礦工藝后的坡體,其邊坡穩(wěn)定性較浸礦前有所降低;針對正在采用原地浸礦工藝的坡體,發(fā)現(xiàn)邊坡穩(wěn)定性系數(shù)隨浸礦時(shí)間的增加,在持續(xù)注液33天左右達(dá)到最低值;通過改變持續(xù)注液速率發(fā)現(xiàn)當(dāng)注液速率小于13.26mm/d時(shí)邊坡穩(wěn)定性系數(shù)在安全標(biāo)準(zhǔn)值以上,建議結(jié)合原地浸礦工藝流程,選擇控制注液速率以降低滑坡發(fā)生概率。
[Abstract]:The rare earth mines in southern Jiangxi are rich in resources, with the characteristics of complete distribution, high content of valuable elements, shallow buried orebodies and low radioactivity ratio of raw ores. The proved reserves rank first in the country. In recent decades, the disorderly mining of rare earth has triggered a large-scale landslide disaster, and the safety of personnel and equipment in the mining process has been seriously threatened. Therefore, The study on landslide risk assessment and prevention in rare earth mines is of great significance to maintain the safety of people's lives and property. Based on the investigation and analysis of the study area, the digital elevation model is established by ARCGIS software, the weight is calculated by analytic hierarchy process (AHP), and the landslide risk zoning of the study area is carried out with the weighted information model, and the high risk grade area is determined. This paper analyzes the influencing factors of high risk area and simulates the change of slope stability coefficient under specific conditions by using geostudio software, and puts forward some suggestions for landslide prevention and control. The main conclusions are as follows: 1. Combined with the actual field investigation data and remote sensing images, the influencing factors of landslide in the study area are analyzed, which provides the basis for the selection of landslide risk assessment factors in the study area. 2. According to the engineering geological conditions of the study area, the slope, slope direction, elevation, in situ leaching area, pool leaching heap leaching area, residential area and undisturbed slope are selected as the evaluation factors. The analytic hierarchy process (AHP) and weighted information model are selected and arcgis spatial analysis function is used to divide the landslide risk into three categories: high, medium and low, in which the high risk area accounts for 15.24% of the total area. 41.49% in the middle risk area and 43.27% in the low risk area. In view of the high risk area of landslide, this paper analyzes the mechanism of landslide caused by each factor, combined with the actual technological process, and uses geostudio software to assist the analysis, and puts forward some suggestions for landslide prevention. 4. For tailings pile, the prevention and control measures of ecological restoration are selected, and the slope stability of the slope body after in-situ leaching technology is lower than that before leaching. For the slope body which is using in-situ leaching technology, it is found that with the increase of leaching time, the stability coefficient of the slope reaches the lowest value in about 33 days of continuous liquid injection. By changing the continuous liquid injection rate, it is found that the slope stability coefficient is above the safety standard value when the liquid injection rate is less than 13.26mm/d. It is suggested that combined with the in-situ leaching process, the liquid injection rate should be controlled to reduce the occurrence probability of landslide.
【學(xué)位授予單位】：江西理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P642.22

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