刘桥二矿二1水平放水试验设计

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1、刘桥二矿二1水平放水试验设计摘要刘桥二矿属华北隐伏型煤田，主采煤层为二叠系下石盒子组4煤层和山西组6煤层。目前刘桥二矿已进入了二水平-600m开采阶段，随着开采水平的延深，煤层底板承受高承压水的威胁也越来越严重。特别是在开采条件下，矿井内断层有可能沟通太灰水和底部奥灰水的联系，造成淹井事故。所以，在该矿井对太灰水进行放水试验，查明矿区水文地质条件和未知参数，就显得很重要了。在综合分析刘桥二矿水文地质资料和充水条件的基础上，本论文作出了针对太灰含水层的放水试验设计。综合放水试验的目的和要求，对放水过程、放水孔和观测孔的平面布置情况、

2、放水孔和观测孔的结构分别进行了设计，并阐述了放水试验前期准备工作以及放水资料的整理和分析等内容。由于太灰水高承压的特点，在防压、防喷方面采取了必要的措施，为放水试验的顺利进行提供了参考依据。关键词：高承压；太灰水；放水试验；ABSTRACTNo.2LiuQiaoCoalmineisaconcealedcoalfieldinnorthernChina,inwhichthefourthseamofthePermian-XiashiheziGroupandthesixthseamofPermian-ShanxiGrouparethema

3、incoalseam,andnowthiscoalminehasenteredintothesecondlevelofminingstageat-600m.Withtheextensionofminingindepth,coalseamfloorismoreandmorethreatenedbyhigh-pressureofconfinedaquifer.Particularlyintheminingconditions,thefaultsinminemaybethetiebetweenlimestonewaterintaiyua

4、nformationandOrdovicianKarstwateratthebottom,causingtheFloodIncident.Therefore,Findingoutthehydrogeologicalconditionsandunknownparametersinminingareasbydewateringtesttolimestonewaterintaiyuanformationisespeciallysignificant.Inthispaper,withthecomprehensiveanalysisthee

5、xistinghydrologygeologymatesandwater-filledconditionsoftheNo.2LiuQiaoCoalMine,theauthormakestheexperimentaldesignoftheturnonwateragainstthe dewateringtesttolimestonewaterintaiyuanformation. Combinethepurpose andtherequirement,andthendesignthecourseofthetest,thestructu

6、reandthelayoutoftheDrillingholesandpeephole,andalsoexpatiatethepreparationsofthetestandsettlementandanalysisofthematerials.Becauseofthehighconfinedpressureofthelimestonewaterintaiyuanformation,necessarymeasuresonpressresistantandblowoutpreventionhavebeentaken,whichpro

7、videsevidenceforthedewateringtest.Keyword:high-confinedwater；limestonewaterintaiyuanformation；dewateringtest；目录1绪论……………………………………………………………………………11.1研究目标………………………………………………………………………11.2选题背景………………………………………………………………………11.3大型放水试验的意义…………………………………………………………21．4研究现状………………………………

8、………………………………………31.5研究内容………………………………………………………………………42矿区概况及地质条件……………………………………………………………62.1矿区概括…………………………………………………………………62.1.1位