本文選題：富水性評價　切入點(diǎn)：地下水?dāng)?shù)值模擬　出處：《中國地質(zhì)大學(xué)(北京)》2017年碩士論文

【摘要】：礦井涌水是煤礦開懫過程中最危險的地質(zhì)問題之一,嚴(yán)重威脅到煤礦的安全生產(chǎn),因此有必要預(yù)先掌握煤層開采所造成的礦井涌水情況,以便提前做好防范措施。本文以山西同富新煤礦作為研究對象,在分析礦區(qū)及其周邊區(qū)域地質(zhì)及水文地質(zhì)條件的基礎(chǔ)上,評價2號煤層直接充水含水層的富水性,并利用GMS軟件建立研究區(qū)地下水三維數(shù)值模型,預(yù)測2號煤層開采所造成的礦井涌水量,并根據(jù)預(yù)測結(jié)果提出相應(yīng)的防水對策。本文主要研究成果有:(1)分析礦區(qū)及其周邊區(qū)域的水文地質(zhì)條件,包括含水層和隔水層特征、地下水徑排補(bǔ)條件、礦井充水因素等。下石盒子組砂巖裂隙承壓含水層是2號煤層的直接充水含水層,其對礦井充水的影響最大。(2)基于GIS多源信息融合方法和層次分析法對2號煤層直接充水含水層的富水性進(jìn)行評價,確定主控因素及其權(quán)重,建立層次結(jié)構(gòu)模型和判斷矩陣,最后得出礦區(qū)內(nèi)2號煤層充水層的富水性指數(shù),并根據(jù)富水性指數(shù)進(jìn)行分區(qū)。由評價結(jié)果可知2號煤層工作面頂板含水層的富水性較強(qiáng),在開采過程中很可能會造成突水,有必要對礦井的涌水量進(jìn)行預(yù)測。(3)基于GMS軟件建立研究區(qū)地下水?dāng)?shù)值模型,確定邊界條件、源匯項(xiàng)以及水文地質(zhì)參數(shù),并對模型進(jìn)行校核。根據(jù)數(shù)值模型預(yù)測了礦井未來五年內(nèi)的涌水情況,分析了五年來礦井涌水量以及地下水位的變化規(guī)律,得到礦井穩(wěn)定涌水量。(4)運(yùn)用“大井法”計(jì)算了礦井的涌水量,將計(jì)算結(jié)果與模型計(jì)算值進(jìn)行對比分析,驗(yàn)證了模擬結(jié)果的可靠性。(5)根據(jù)礦井涌水量預(yù)測結(jié)果提出防水對策。
[Abstract]:Mine water gushing is one of the most dangerous geological problems in the process of coal mine opening, which seriously threatens the safety of coal mine production. Therefore, it is necessary to grasp the mine water gushing situation caused by coal seam mining in advance. This paper takes Tongfuxin Coal Mine of Shanxi Province as the research object and evaluates the water-rich water content of the water-filled aquifer of No. 2 Coal seam on the basis of analyzing the geological and hydrogeological conditions of the mining area and its surrounding areas. The 3D numerical model of groundwater in the study area is established by using GMS software, and the mine water discharge caused by the mining of No. 2 coal seam is forecasted. According to the forecast results, the corresponding waterproof countermeasures are put forward. The main research results of this paper are: 1) analyzing the hydrogeological conditions of the mining area and its surrounding areas, including the characteristics of the aquifer and the water-separating layer, and the condition of the recharge of the diameter and discharge of the groundwater. The sandstone fissure confined aquifer of Xiashihezi formation is the direct water-filled aquifer of No. 2 coal seam. Based on GIS multi-source information fusion method and analytic hierarchy process (AHP), this paper evaluates the water enrichment of the No. 2 coal seam direct water-filled aquifer, determines the main control factors and their weights, and establishes the hierarchical structure model and judgment matrix. Finally, the water-rich index of the water-filled layer of No. 2 coal seam in the mining area is obtained and divided according to the water-rich index. The evaluation results show that the water-rich aquifer in the roof of No. 2 coal seam face is strong, which may cause water inrush in the mining process. It is necessary to predict the mine water discharge. (3) based on the GMS software, the groundwater numerical model of the study area is established to determine the boundary conditions, source and sink terms and hydrogeological parameters. According to the numerical model, the water inflow in the next five years is forecasted, and the variation law of mine discharge and groundwater level in the past five years is analyzed. The steady water inflow of mine is obtained. (4) the method of "large well" is used to calculate the water inflow of mine, and the calculated result is compared with the calculated value of the model, and the reliability of the simulation result is verified. 5) according to the forecast result of mine water discharge, the waterproof countermeasures are put forward.
【學(xué)位授予單位】：中國地質(zhì)大學(xué)(北京)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：P641.461
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本文編號：1675928