本文選題：淮南煤田 + 構(gòu)造控水�。� 參考：《安徽理工大學(xué)》2015年碩士論文

【摘要】：淮南煤田是中國東部地區(qū)主要的產(chǎn)煤基地,構(gòu)造單元屬華北板塊豫淮坳陷沉煤盆地,地層受構(gòu)造運動改造,區(qū)內(nèi)構(gòu)造極其發(fā)育,巖體工程力學(xué)性質(zhì)較差,飽受各種水患的侵害。原來根據(jù)南北向?qū)_推覆緯向斷層將淮南煤田劃分為南中北三個水文地質(zhì)單元,分界斷層是阜鳳斷裂和尚塘-明龍山斷裂。隨著淮南地區(qū)水資源的開發(fā)利用以及煤田深部煤炭資源的解放需求與日俱增,老的分區(qū)方案顯得過于簡單、片面,無法滿足水資源開發(fā)和礦井水害防治需求。本次淮南煤田水文地質(zhì)單元劃分及區(qū)域水文地質(zhì)圖件編制,以期制定更能夠反映兩淮地區(qū)水文地質(zhì)特征的分區(qū)方案,為區(qū)域水資源開發(fā)利用和礦井水患防治提供依據(jù)。 淮南地區(qū)處華北板塊南緣逆沖推覆系統(tǒng)的前鋒帶,南北向都發(fā)育有大型的阻水?dāng)嗔?這些斷裂兩側(cè)水文地質(zhì)特征有著明顯區(qū)別。大型控水?dāng)嗔炎鳛樽钪饕姆謪^(qū)因素,這點與老分區(qū)方案的意圖是一致的,除此之外,新方案綜合考慮了區(qū)域性阻水?dāng)嗔褍蓚?cè)水文地質(zhì)特征的差異。阜鳳逆沖斷層以南為逆沖推覆系統(tǒng)的前陸位置,地層結(jié)構(gòu)極其復(fù)雜,因而不同區(qū)域水文地質(zhì)條件差別很大,如淮南老礦區(qū)有些區(qū)域寒武系灰?guī)r出露地表,直接接受鄰區(qū)松散層水的側(cè)向補(bǔ)給和大氣降水,形成降落漏斗；基巖為太古界片麻巖的區(qū)域,松散層水對原地系統(tǒng)的垂向補(bǔ)給通道開放、水量很大等。阜鳳逆沖斷層以北區(qū)域主要是巨厚松散層覆蓋基巖,松散層厚度以及底含性質(zhì)基本決定了基巖含水層的補(bǔ)給條件。 基于地質(zhì)構(gòu)造、地層條件、補(bǔ)徑排條件、水動力條件以及水化學(xué)場等多因素綜合考慮,淮南地區(qū)水文地質(zhì)單元劃分新方案擬作三級劃分,一級單元以區(qū)域性控水構(gòu)造為劃分依據(jù),分為南區(qū)、中區(qū)和北區(qū)；二級單元在一級單元的基礎(chǔ)上,分為松散層覆蓋區(qū)、推覆體區(qū)以及灰?guī)r補(bǔ)給區(qū)；三級單元在二級單元的基礎(chǔ)上,松散層覆蓋區(qū)分為“紅層”覆蓋區(qū)、四含補(bǔ)給區(qū)、三隔覆蓋區(qū)和其他含水層覆蓋區(qū),推覆體區(qū)分為片麻巖區(qū)、推覆體灰?guī)r區(qū)、推覆體煤系地層區(qū),灰?guī)r補(bǔ)給區(qū)分為灰?guī)r裸露區(qū)和松散層補(bǔ)給灰?guī)r區(qū)。
[Abstract]:Huainan coalfield is the main coal-producing base in eastern China. The tectonic unit is a submersible coal basin in the Yuhuai depression of North China plate. The strata are reformed by tectonic movement, the structure is extremely developed in the area, the mechanical properties of rock mass engineering are poor, and they are affected by various kinds of floods. The Huainan coalfield is divided into three hydrogeological units in the south and north according to the north and south fault. The boundary fault is the Fufeng fault and the Tongtang-Minglongshan fault. With the development and utilization of water resources in Huainan area and the increasing demand for the liberation of deep coal resources in coal fields, the old zoning plan is too simple and one-sided to meet the needs of water resources development and mine water disaster prevention. The division of hydrogeological units and the compilation of regional hydrogeological maps in Huainan coalfield are aimed at drawing up a zoning scheme which can reflect the hydrogeological characteristics of the Huanghuai area and provide the basis for the development and utilization of regional water resources and the prevention and control of mine water hazards. Huainan area is located in the front zone of the thrust nappe system in the southern margin of the North China plate. There are large water-blocking faults in the south-north direction, and the hydrogeological characteristics on the two sides of these faults are obviously different. Large-scale water-controlled fault is the most important factor in zoning, which is consistent with the intention of the old zoning scheme. In addition, the new scheme takes into account the differences of hydrogeological characteristics on both sides of the regional water-blocking fault. The south of Fufeng thrust fault is the Foreland position of thrust-nappe system, and the stratigraphic structure is extremely complex, so the hydrogeological conditions vary greatly in different regions, such as the exposed surface of Cambrian limestone in some regions of Huainan mining area. It directly receives the lateral recharge and atmospheric precipitation of the loose bed water in the adjacent area and forms a falling funnel. The bedrock is the Archean area of gneiss and the loose layer water is open to the vertical recharge channel of the in-situ system and the amount of water is very large. To the north of Fufeng thrust fault, the overburden of bedrock is mainly composed of very thick and loose layer, and the thickness of loose layer and the property of bottom bearing basically determine the recharge condition of bedrock aquifer. Based on the comprehensive consideration of geological structure, stratigraphic conditions, diameters and drainage conditions, hydrodynamic conditions and hydrochemical fields, the new scheme of hydrogeological unit division in Huainan area is proposed to be divided into three levels. On the basis of regional water control structure, the first grade unit is divided into the south, middle and north regions, the second grade unit is divided into loose overburden area, nappe area and limestone recharge area on the basis of the first class unit. On the basis of the secondary unit, the loose layer cover is divided into "red layer" coverage area, four recharge area, three cover area and other aquifer coverage area, and the nappe is divided into gneiss area and nappe limestone area, In the nappe coal measure formation area, limestone recharge is divided into bare limestone area and loose layer recharge limestone area.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P641.461

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