本文關(guān)鍵詞： 洪山泉域 煤礦開采 巖溶地下水環(huán)境 數(shù)值模擬　出處：《太原理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：山西是我國北方諸省中碳酸鹽巖分布最多、最廣的省份，同時也是煤炭大省。隨著煤礦開采深度的加深，煤系地層上覆的含水層造成不同程度的破壞，煤系地層下伏的巖溶水已成為工業(yè)與城市、農(nóng)村生活的主要供水水源。近年來，洪山泉域內(nèi)煤礦開采排水對巖溶地下水環(huán)境產(chǎn)生較大影響，因此加強煤礦開采對洪山泉域水環(huán)境影響的研究具有十分重要的意義[1]。 本論文以平遙二畝溝煤礦為例，分析了洪山泉域及二畝溝煤礦井田地質(zhì)和水文地質(zhì)條件，考慮對11號煤層帶壓區(qū)采取降壓疏水措施[2]，選取了洪山泉域的一個子區(qū)域部分作為此次的研究區(qū)域，在系統(tǒng)分析地下水?dāng)?shù)值模擬方法的基礎(chǔ)上，運用有限差分法，，采用三維非穩(wěn)定流數(shù)學(xué)模型對研究區(qū)地下水系統(tǒng)進(jìn)行了數(shù)值模擬。首先應(yīng)用Visual modflow建立水文地質(zhì)概念模型和數(shù)學(xué)模型[3]，對研究區(qū)域地下水動態(tài)變化進(jìn)行了評價；其次用該水流模型預(yù)測二畝溝煤礦采取巖溶水疏排措施對洪山泉巖溶地下水的影響，為煤礦開采與洪山泉域巖溶地下水資源的保護提供依據(jù)[4-5]，為區(qū)域地下水資源的科學(xué)管理提供了有意義的參考。主要研究內(nèi)容有： 第一前期進(jìn)行項目背景下的野外水文地質(zhì)調(diào)查及項目周邊范圍的取用水情況調(diào)查，并收集相關(guān)的地質(zhì)及水文地質(zhì)資料。 第二在調(diào)查和分析資料的基礎(chǔ)上，概括總結(jié)和闡述二畝溝煤礦井田和洪山泉域研究區(qū)的自然地理、地質(zhì)和水文地質(zhì)條件等。概化研究區(qū)水文地質(zhì)特點，提出研究區(qū)水文地質(zhì)概念模型。建立研究區(qū)非均質(zhì)三維非穩(wěn)定流數(shù)學(xué)模型，利用有限差分法進(jìn)行數(shù)值求解。 第三根據(jù)實際水文地質(zhì)特征離散研究區(qū)域，對目標(biāo)含水層的滲透系數(shù)、彈性釋水系數(shù)等水文地質(zhì)參數(shù)進(jìn)行分區(qū)，利用背景項目調(diào)查和實測資料進(jìn)行模型識別和校驗，經(jīng)過識別與檢驗的地下水?dāng)?shù)值模型可直接用于研究區(qū)地下水的動態(tài)預(yù)測。 第四利用以上的水流模型，預(yù)測了當(dāng)二畝溝煤礦開采11號煤層采取了對帶壓區(qū)疏排奧陶系巖溶水措施時研究區(qū)域巖溶地下水動態(tài)變化的影響：即在二畝溝煤礦井田中東部突水系數(shù)0.06—0.07MPa/m之間的地段布設(shè)1口疏水井進(jìn)行降壓，100d后形成以疏水井為中心的降水漏斗，漏斗中心的水位降深約為32m，影響面積約為5.34km2；150d后漏斗中心的水位降深約為54m，影響面積約為13.29km2。并做出相關(guān)預(yù)測結(jié)果分析、提出建議和巖溶水保護措施。
[Abstract]:Shanxi is China's northern provinces in the carbonate rock distribution, most provinces, at the same time the coal big province. With the mining depth deepening, coal bearing strata overlying aquifer caused varying degrees of damage, under the coal stratum karst water Volt has become the industry and the city, the main source of water supply in rural life. In recent years, Hongshan in spring area of coal mining drainage have great influence on karst groundwater environment, thus strengthening the [1]. is of great significance to study Hongshan spring area water environmental impact of coal mining
This paper takes Pingyao two acres of coal mine as an example, analysis of the Hongshan spring area and two Mu Gou coal mine geological and hydrogeological conditions, considering of No. 11 coal seam pressure area pressure drainage measures [2], selected a sub area of Hongshan spring area as the study area of this, based on the analysis of simulation method the groundwater numerical simulation, using the finite difference method, the three-dimensional unsteady flow mathematical model of groundwater system is studied by numerical simulation. We establish the [3] model and the mathematical model of hydrogeological conceptual application of Visual MODFLOW, the dynamic changes of groundwater in the study area were evaluated; prediction of two acres of coal mine karst water drainage measures take effect the karst groundwater of Hongshan Spring followed by the flow model, provide the basis for the protection of [4-5] coal mining and Hongshan karstic groundwater resources, to the regional groundwater resources Scientific management provides a meaningful reference. The main contents are:
First, the field hydrogeological survey and water intake survey of the surrounding area under the background of the project were carried out, and the related geological and hydrogeological data were collected.
Second based on the investigation and analysis of data, summarizes and expounds the natural geography of two acres of coal mine and Hongshan ditch spring field, geological and hydrogeological conditions. Generalized hydrogeological characteristics of the study area, the hydrogeological conceptual model of the study area. The study area of heterogeneous 3-D unsteady flow mathematical model. Was solved numerically by finite difference.
Third according to the actual hydrogeological characteristics of the discrete research area, the permeability coefficient of aquifer, elastic water release coefficient of hydrogeological parameters of partition, model identification and verification of the background of project investigation and measured data, the groundwater numerical model identification and verification can be directly used for the dynamic prediction of groundwater in the study area.
The flow model using the above fourth, when two acres of forecast ditch coal mine No. 11 coal seam has taken effect on dynamic change of regional karst groundwater pressure drainage area Ordovician karst water measures: between two Mu Gou coal mine east water inrush coefficient 0.06 - 0.07MPa/m 1 wells hydrophobic sections laid buck, 100D after the formation of precipitation funnel to drain well as the center of the water level drawdown funnel center is about 32m, the influence area is about 5.34km2; 150D after the water level drawdown in funnel center is about 54m and the affected area is about 13.29km2. and make the prediction results analysis, suggestions and karst water protection measures.

【學(xué)位授予單位】：太原理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P641.8

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