【摘要】：新疆準(zhǔn)東地區(qū)作為國家規(guī)劃的新疆四大煤電基地之一,擁有豐富的煤炭資源。本文依托新疆天池能源準(zhǔn)東五彩灣煤電一體化項目進行選題,通過資料搜集與現(xiàn)場地面調(diào)查,查明研究區(qū)的水文地質(zhì)、環(huán)境地質(zhì)條件;開展水文地質(zhì)環(huán)境地質(zhì)調(diào)查、物探、坑探、鉆探、滲水試驗、室內(nèi)彌散試驗、水土樣采集分析、地下水監(jiān)測和室內(nèi)資料分析等,在此基礎(chǔ)上建立包氣帶污染物運移數(shù)值模擬模型。針對非正常工況下可能出現(xiàn)的情景進行模擬,預(yù)測和評價建設(shè)項目在建設(shè)期、生產(chǎn)運行期及服務(wù)期滿后對地下水環(huán)境可能造成的影響。通過野外實地調(diào)查工作,獲得了真實且準(zhǔn)確的原始數(shù)據(jù)資料,通過HYDRUS軟件對電廠廠區(qū)和貯灰場區(qū)地下水污染物運移規(guī)律和特征進行模擬,得到以下結(jié)論:(1)經(jīng)過環(huán)境水文地質(zhì)測繪、地面物探、坑探、鉆探和滲水試驗,確定電廠廠區(qū)和貯灰場區(qū)包氣帶相關(guān)水文地質(zhì)參數(shù)。(2)通過室內(nèi)土柱彌散試驗,測得了五彩灣地區(qū)3種不同類型土壤的縱向彌散系數(shù)分別:FMH為936.9 cm2?h-1,SH6為443.8 cm2?h-1,SH1為119.1 cm2?h-1,FMH、SH1、SH6等介質(zhì)對氯離子可產(chǎn)生較大的吸附作用,可以達到8%左右。粉煤灰堆體(FMH)和電廠廠區(qū)土體(SH6)透水性很差,是很好的防污染介質(zhì);灰場土體(SH1)透水性較差,是較好的防污染介質(zhì)。(3)應(yīng)用非飽和水流模擬軟件(HYDRUS-1D)模擬貯灰場區(qū)十年一遇、百年一遇和千年一遇情境下淋濾液污染物運移狀況,結(jié)果表明,貯灰場淋濾液不會隨降雨入滲進入貯灰場區(qū)目的含水層(潛水含水層)。(4)應(yīng)用非飽和水流模擬軟件(HYDRUS-1D)模擬電廠廠區(qū)廢水連續(xù)事故泄露情景下污染物運移狀況,結(jié)果為:連續(xù)排污1天,最大入滲深度3.6 m,未到達目的含水層(承壓含水層);連續(xù)排污10天,最大入滲深度8.7 m,未到達承壓含水層;連續(xù)排污30天,最大入滲深度14.2 m,未到達承壓含水層;連續(xù)排污100天,污染物進入承壓含水層,但其最大濃度僅為0.033 g/L(遠小于該區(qū)ZK4孔承壓水的礦化度102.9 g/L);連續(xù)排污365天,污染物進入承壓含水層,但其最大濃度僅為1.7 g/L(遠小于該區(qū)ZK4孔承壓水的礦化度102.9 g/L)。
[Abstract]:As one of the four major coal power bases planned by the state, the eastern region of Xinjiang has abundant coal resources. This article relies on Xinjiang Tianchi Energy Zhongdong Wucai Bay coal-electricity integration project, through data collection and on-the-spot ground investigation, to find out the hydrogeological and environmental geological conditions of the study area; Conduct hydrogeological environmental geological survey, geophysical exploration, pit exploration, drilling, seepage test, indoor dispersion test, soil and water sample collection and analysis, groundwater monitoring and indoor data analysis, etc. On this basis, a numerical simulation model of pollutant transport in aerated zone is established. The possible scenarios under abnormal working conditions are simulated to predict and evaluate the possible impacts of construction projects on groundwater environment during the construction period, production operation period and after service expiration. Through the field investigation, the real and accurate original data are obtained. By using HYDRUS software, the law and characteristics of groundwater pollutant transport in power plant and ash storage area are simulated. The conclusions are as follows: (1) after environmental hydrogeological mapping, surface geophysical exploration, pit exploration, drilling and seepage test, the relevant hydrogeological parameters of aeration zone in power plant area and ash storage area are determined. (2) through the indoor soil column dispersion test, the hydrogeological parameters of the aerated zone in the plant area and the ash storage area are determined. The longitudinal dispersion coefficients of three different types of soils in Wucai Bay area were measured as follows: FMH is 936.9 cm2?h-1,SH6, 443.8 cm2?h-1,SH1 is 119.1 cm2?h-1,FMH,SH1, and 443.8 cm2?h-1,SH1 is 119.1 cm2?h-1,FMH,SH1,. The adsorption of chloride ions by SH6 and other media can reach about 8%. The (FMH) of fly ash stack and the soil mass (SH6) of power plant are poor in water permeability, which is a good anti-pollution medium. Ash field soil (SH1) is a better anti-pollution medium because of its poor permeability. (3) unsaturated water flow simulation software (HYDRUS-1D) is used to simulate the leachate contaminant transport situation under the conditions of once-in-a-decade, once-in-a-century and once-in-a-thousand years. The results show that The leachate from the ash storage site will not enter the target aquifer (the submersible aquifer). (4) with rainfall. The unsaturated flow simulation software (HYDRUS-1D) is used to simulate the pollutant transport under the continuous accident leakage scenario of the wastewater in the power plant. The results are as follows: 1 day continuous discharge, the maximum infiltration depth is 3.6 m, and the target aquifer (confined aquifer) is not reached; For 10 consecutive days, the maximum infiltration depth is 8.7m, and the maximum infiltration depth is 14.2 m without reaching the confined aquifer, and the maximum infiltration depth is 14.2 m after continuous discharge for 30 days, and the maximum infiltration depth is 8.7m without reaching the confined aquifer for 30 days. After 100 days of continuous discharge, the pollutants enter the confined aquifer, but the maximum concentration is only 0.033 g / L (much less than the salinity of ZK4 pore confined water in this area is 102.9 g / L). The pollutants enter the confined aquifer for 365th consecutive days, but the maximum concentration is only 1.7g / L (much less than the salinity of 102.9 g / L for ZK4 pore confined water in this area).
【學(xué)位授予單位】：新疆農(nóng)業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：X82

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