12357.陜北侏羅紀(jì)煤田水文地質(zhì)特征及水文地質(zhì)單元劃分

1、論文題目：陜北侏羅紀(jì)煤田水文地質(zhì)特征及水文地質(zhì)單元劃分專業(yè)：礦產(chǎn)普查與勘探碩士生：牟來艷（簽名）指導(dǎo)教師：王英（簽名）摘要礦井水害是困擾我國煤礦安全生產(chǎn)的一個重要問題。水害發(fā)生的共性都表明一個事實，即礦井水文地質(zhì)條件不清，忽視了水文地質(zhì)工作的重要性。礦區(qū)水文地質(zhì)特征及地下水系統(tǒng)地不明、水文地質(zhì)單元劃分不清等是造成礦井防治水工作被動的主要因素，嚴(yán)重影響了礦井安全生產(chǎn)。在研究清楚區(qū)域地質(zhì)與水文地質(zhì)特征，掌握地下水的補(bǔ)徑排規(guī)律的基礎(chǔ)上，進(jìn)行水

2、文地質(zhì)單元的劃分，這是科學(xué)防治礦井水害的重要前提。本文以陜北侏羅紀(jì)煤田為研究對象，在大量收集研究區(qū)已有地質(zhì)資料基礎(chǔ)上，重點(diǎn)分析研究區(qū)地質(zhì)條件和水文地質(zhì)條件，總結(jié)研究陜北侏羅紀(jì)煤田水文地質(zhì)特征，分析主要含水層、隔水層及地下水補(bǔ)給、徑流、排泄條件。依據(jù)相關(guān)規(guī)范要求和成果，對研究區(qū)逐級進(jìn)行水文地質(zhì)單元劃分。選取典型水文地質(zhì)單元，從地形地貌、地層巖性、地質(zhì)構(gòu)造、含水層富水性、基巖頂面形態(tài)等五個方面進(jìn)行次一級水文地質(zhì)單元劃分。研究表明，區(qū)內(nèi)水文地

3、質(zhì)單元受控于區(qū)域地質(zhì)條件、水文地質(zhì)條件、古沉積環(huán)境、地層空間特征、構(gòu)造條件和現(xiàn)代地貌等因素的影響；依據(jù)基巖頂面等值線確定出了古河道及地下分水嶺的位置，其地下水的分水嶺與現(xiàn)代分水嶺基本一致。對研究區(qū)的地下水系統(tǒng)進(jìn)行定性分析，結(jié)合相關(guān)經(jīng)驗，選取恰當(dāng)?shù)脑u價集，建立模糊綜合評判模型，運(yùn)用層析分析法，針對典型水文地質(zhì)單元的進(jìn)一步劃分進(jìn)行評判。傳統(tǒng)定性分析和現(xiàn)代定量計算相互補(bǔ)充和完善，使得劃分結(jié)果更加符合實際。關(guān)鍵詞：侏羅紀(jì)煤田；水文地質(zhì)特征；水文

4、地質(zhì)單元；層次分析法研究類型：應(yīng)用研究Subject:ResearchontheHydrogeologicalacteristicstheHydrogeologicalElementdividedofJurassicCoalfieldinNthernShaanxiProvinceSpecialty:MineralSurveyExplationName:MuLaiYan（Signature）Instruct:WangYing（Signat

5、ure）ABSTRACTTheminewaterhazardwasanimptantproblemwhichperplexesthecoalminesafetyproductioninChina.Theambiguouscoalminehydrogeologicalconditionsignetheimptanceofhydrogeologicalwkwerethecommonacteristicswhenthecoalminewate

6、rhazardsoccurred.Pounderstingofthehydrogeologicalacteristicsgroundwatersystemstogetherwithuncleardelineationofthehydrogeologicalunitsarethemainfactsleadingtotheineffectivenessofminewatercontrolmeasureswhichposesaserioust

7、hreatonminesafetyproductionitisthekeypreconditionwhichthescientificpreventioncontrolofcoalminewaterhazard.TheresearchobjectofthisthesisistheJurassicCoalfieldinNthernShaanxiProvince.Basedoncollectedgeologicaldatathisthesi

8、sanalyzedthegeologicalhydrogeologicalconditionssummarizedthehydrogeologicalacteristicsanalyzedtheregerunoffdisgeconditionsofthemainaquiferimpermeablelayergroundwateraswellaswaterfilledconditionsthepossibilityofwaterhazar

9、d.Accdingtorelevantguidelinesresultswedividedeachlevelofundergroundwatersystem.Choosethetypicalhydrogeologicalunitstotheproximategradedivisionwhichfmfiveaspectssuchaslfmfmationlithologygeologicalstructurethewateryofaquif

10、erfmofthetopofbedrock.Theresultsindicatethatthehydrogeologicalelementintheregionarecontrolledbyregionalgeologicalconditionshydrogeologicalconditionsancientdepositionalenvironmentspatialacteristicsofstratumstructuralcondi

11、tionsmoderntopographyetcthelocationofancientriverrelativelywaterrichareaoftheaquiferisdeterminedbasedonthecontoursofbedrocksurfaceconfirmthelocationofthefossilrivercoursethegroundwaterwatershed.Carryoutqualitativeanalysi