欢迎来到天天文库
浏览记录
ID:32524205
大小:14.01 MB
页数:99页
时间:2019-02-10
《潘三煤矿西翼8煤水文地质特征研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、摘要矿井水文地质特征的正确认识对煤矿的安全高效生产有着重大的现实意义。本文针对淮南煤田潘三煤矿西翼8煤水文地质特征进行了深入细致的研究。首先根据钻孔资料统计、利用XRD和扫描电镜试验测试分析了西翼主要含隔水层的沉积分布特征及含隔水性;通过地下水动态变化特征和矿井水化学特征分析,得出矿井含水层埋藏越深水的径流条件越差,地下水以浅部循环为主,深部地下水径流相对较弱,说明矿井处于一个封闭的水文地质单元,以静储量为主;通过构造控水性特征分析,综合得出煤系砂岩裂隙水为西翼8煤层开采的直接充水水源,特别在砂岩裂隙发育部位,涌水量较大,对矿井生产威胁较大,“下部含水层’’和灰岩含水层为间
2、接充水含水层,当有导水断裂或导水陷落柱处,有参与矿井充水的可能。其次运用数值模拟的手段获得西翼8煤底板最大破坏深度为14m,运用灰色BP神经网络预测导水裂隙带高度为41.8m,根据“三下”规程计算得出导水裂隙带高度为41.31m-50.90m;以顶底板采动破坏规律研究为基础,确定富水性评价指标的获取范围,综合砂岩总厚、断裂分维值、钻孔泥浆漏失量和岩芯采取率四项指标,运用了灰色模糊综合评判对西翼8煤层顶底板砂岩裂隙水进行富水性分区,分区结果和实际生产情况吻合较好。同时本文采用传统的灰色预报模型与Markov预报模型有机结合地起来,建立了灰色Markov模型,并用于矿井西翼年平
3、均涌水量预报,此方法为预测矿井涌水量提供了一条新途径,拓广了灰色系统预测与Markov链预测的应用范围。最后根据研究分析结果,提出相应的建议,从而为矿井水害防治提供了科学依据。图42表28参60关键词:富水性;涌水量;数值模拟;神经网络;Markov分类号:(1--2)TDl2;安徽理工大学硕士论文Abs仃actTomakecorrectjudgmentofhydrology—geologicalfeaturesiskeytohighoutputandworkefficiencyofcoalmine.Thispaperresearchdeeplyonhydrogeologi
4、calfeaturesofNo.8coalinwesternPanSancoalmilleofHuainancoalfield.Fristly,basedonstatisticaldrill、XRDandSEM(scanningelectronicmicroscope)data,sedimentarycharacteristicsandwater-bearingandwater-resistingofmainlyaquifersarestudied;Throughtheanalysisonthedynamiccharacteristicsofgroundwaterandch
5、emicalcharacteristicsofminewater,deepaquiferhaveworserunoffconditions,groundwatermainlyinshallowcirculating,runoffofdeepgroundwaterisrelativelyweak,it’Sresultedthatmineisaclosedhydrogeologicalunitsandmainlyinstaticreserves;Bysummarizingstructuralcontrolcharacters,thispapercometoaconclusion
6、thatsandstonefissurewaterisdirectwaterfillingwaterofNo.8coal,especiallyinabundantsandstone丘actIlfes,yieldisbigger,meanwhile,isgreaterthreattosafetyproduction.Theloweraquiferandlimestoneaquiferareindirectwaterfillingaquifers,whichfloodtominepossiblelyatwaterguidingfaultandguidingdowncastpil
7、lar.Secondly,ForecastingNo.8coalmaximumdepthis14mbyusingnumericalsimulation,forecastingrooffracturezonesis41.8mbyusinggrayBPneuralnetwork,calculatingheightofcrannyguidingwateris41.31m-50.90musingby“coal—miningunderthreecircumstances".Basedonthedeformationlawof
此文档下载收益归作者所有