金鑫矿瓦斯抽放设计

河南理工大学本科毕业设计I金鑫矿瓦斯抽放设计摘要：金鑫矿金鑫煤矿位于登封市送表乡安庄村，行政区划隶属登封市送表乡管辖，矿区东北距登封市约25km。主要可采煤层为赋存于山西组下部的二1煤层，矿井绝对瓦斯涌出量为16.1m3/min，相对瓦斯涌出量为25.47m3/t。本文从介绍整个矿区概况着手，进而分析二1煤层瓦斯储量和瓦斯涌出量，并对瓦斯抽放的可行性和必要性进行论证。结合金鑫矿的地质条件和采煤方法，对金鑫矿进行掘进工作面穿层钻孔抽放和顺层钻孔抽放，回采工作面顺层平行抽放和采空区高位钻孔和埋管抽放，并设计钻孔布置。之后结合矿区工业广场具体情况进行地面泵站和瓦斯抽放管路设计，进行管径计算、管网阻力计算、管路敷设，采用水环式真空泵作为瓦斯抽放泵，选取2BEC42型水环真空泵。与之匹配的瓦斯抽放泵及附属设施。而后制定预抽放施工有关的安全技术措施和抽放瓦斯管理。关键词：二1煤层；瓦斯抽放；设计河南理工大学本科毕业设计IIGasDrainageDesignofJinXinCoalMineAbstract:minecoalmineislocatedindengfengcityjinxinjinxinsendtableAnZhuangvillagetownship,administrativedivisionofdengfengcitybelongstotablejurisdiction,theminingareaisabout25kmnortheastdengfengcity.MainCaiMeiCengcanoccurinshanxigroupforthebottomofthetwo1coalseam,absolutelyminegasemissionis16.1m3/min,relativegasemissionis25.47m3/t.Thispaperintroducestheoverallsituationtominingarea,andthenanalyzesthecoalseamgasreservesand1gasemission,andgasdrainageofthefeasibilityandnecessityoftheargument.Combinedwiththegeologicalconditionsandjinxinoreminingmethod,thexinhuitenoreheadingfaceweardrainagelayerandlayerdrillingboreholedrainage,miningfacealongthelayerparalleldrainageandgoafdrillingandburiedtubehighdrainage,anddesignthedrillholelayout.Afterconsideringtheminingindustryspecificsituationsquaregroundpumpstationandgasdrainagepipelinedesign,calculation,pipediameterresistancecalculation,pipelaying,usewaterringtypevacuumpumpasgasdrainagepumps,select2BEC42typewaterringvacuumpumps.Matchinggasdrainagepumpandaffiliatedfacilities.Andthenmakethedrainageconstructionaboutsafetytechnicalmeasuresanddrainagegasmanagement.Keywords:CoalseamNo.2;Gasdrainage;design河南理工大学本科毕业设计i目录1引言....................................................................11.1选题的目的和意义...................................................11.2国内外研究综述.....................................................11.3毕业设计所用的方法.................................................12矿井概况................................................................22.1交通位置及矿井范围.................................................22.2自然概况..........................................................22.3地质概况..........................................................32.3.1矿井地层.....................................................32.3.2地质构造.....................................................52.4煤层赋存与煤质....................................................62.4.1煤层赋存.....................................................62.4.2煤质特征.....................................................62.5矿井开拓与开采....................................................72.6矿井通风与瓦斯....................................................73矿井瓦斯抽放的必要性与可行性............................................93.1金鑫矿瓦斯基础参数................................................93.1.1瓦斯含量测定.................................................93.1.2煤层瓦斯压力间接测定........................................103.1.3瓦斯压力直接测定............................................113.1.4煤的瓦斯吸附常数测定........................................113.1.5煤的坚固性系数及瓦斯放散初速度的测定........................123.2邻近矿井瓦斯基础参数.............................................133.2.1新丰二矿和新丰矿............................................133.2.2阳城二矿....................................................143.3矿井瓦斯储量.....................................................163.4矿井瓦斯可抽量...................................................163.5矿井瓦斯涌出量预测...............................................173.5.1矿井瓦斯涌出构成关系........................................173.5.2回采工作面的瓦斯涌出量......................................183.5.3掘进工作面的瓦斯涌出量......................................193.5.4生产采区瓦斯涌出量预测......................................213.5.5矿井瓦斯涌出量预测..........................................223.6瓦斯抽放的必要性.................................................233.7瓦斯抽放的可行性.................................................244瓦斯抽采方法...........................................................254.1抽采方法选择.....................................................254.1.1抽采方法选择依据............................................254.1.2抽放方法选择................................................254.2掘进工作面抽放方法...............................................264.2.1底板巷水力冲孔卸压增透预抽煤层瓦斯..........................264.2.2顺层长钻孔掩护煤巷掘进区域防突措施..........................27河南理工大学本科毕业设计ii4.3回采工作面抽放方法...............................................294.4采空区抽放方法...................................................314.4.1采空区高位抽放..............................................314.4.2采空区埋管抽放..............................................314.5抽放钻孔的密封...................................................324.5.1封孔深度....................................................324.5.2封孔材料....................................................324.5.3封孔工艺....................................................325抽放管路系统选型设计...................................................345.1抽放管路系统路线.................................................345.2抽采规模预计.....................................................345.3抽放管路选型计算.................................................345.4管网阻力计算.....................................................355.5管