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河南理工大学本科毕业设计1古汉山煤矿瓦斯抽放系统摘要:矿井瓦斯是成煤过程中的一种伴生产物,其主要成分是甲烷。它是一种无色、无味、无臭的气体。比空气轻,相对密度为0.554。为了减少和解除矿井瓦斯对煤矿安全生产的威胁,利用机械设备和专用管道造成的负压,将煤层中存在或释放出的瓦斯抽出来,输送到地面或其他安全地点的做法,叫做瓦斯抽放。本文介绍了古汉山煤矿瓦斯抽放系统在采掘工作面的应用经验,采煤工作面瓦斯治理综合抽放方式主要采用在工作面进回风巷和开切眼布置走向和斜向抽采钻孔、工作面内网格抽放等措施实施瓦斯抽采治理,条件允许的情况下积极采用顶底板岩巷施工穿层钻孔进行辅助抽采。古汉山矿是煤与瓦斯突出矿井,凡顶层采掘面均按突出危险区管理,均严格执行了“四位一体”综合防突措施,采掘前必须先采取防突措施,然后进行效果检验,效果检验采用《防突细则》规定方法。关键词:矿井矿井通风瓦斯瓦斯涌出量瓦斯抽放河南理工大学本科毕业设计2Abstract:coalminegasisintheprocessofaproduct,itsmaincomponentsassociatedismethane.Itisacolourless,odourlessandtastelessgas.Lighterthanair,relativedensityfor0.554.Inordertoreduceorremoveminegastocoalminesafetyinproduction,usemechanicalequipmentandspecialpipelinecausedbynegativepressure,willexistincoalseamgasorrelease,transportedoutofthegroundorothersecuritysites,calledthegasdrainage.Thepaperintroducesthehanmountaincoalgasdrainagesystemsinminingfaceapplicationexperience,coalfacegastreatmentcomprehensivedrainagemodeinthemainmininginreturnroadwayandcutlayoutandobliqueboreholefully-mechanizedextraction,drainagemeasuresinthegrid,implementationofgasextractionconditionsallowtheroofandfloorconstructionwearlayersareassistedextractionholes.AncientChinesecoalmineisofcoalandgasoutburst,alltop-levelminingfacetheseriousdanger,strictlyenforcethefour-in-onecomprehensivepreventionmeasuresmustbetakenbefore,miningandpreventionmeasures,theeffectoftheeffectofthedetailedrulesregulationmethods.Keywords:mineventilationsystemgasgasflow-volumegasdrainage河南理工大学本科毕业设计3目录1引言.........................................................62矿井概况.....................................错误!未定义书签。2.1井田概况.................................错误!未定义书签。2.1.1地理位置...........................................2.1.2井田范围...........................................2.1.3交通...............................................2.1.4自然地理...........................................2.1.5气象资料...........................................2.1.6井田开采史.........................................2.1.7邻近矿井概况.......................................2.2井田地质特征............................错误!未定义书签。2.2.1地质构造...........................................2.2.2含煤地层及煤层.....................................2.2.3煤层瓦斯、自然及爆炸倾向性.........................2.2.4井田水文地质.......................................2.3矿井开拓、开采概况.......................错误!未定义书签。2.3.1开拓方式...........................................2.3.2矿井开采系统.......................................2.4矿井通风系统概况.....................错误!未定义书签。3矿井瓦斯赋存情况.............................错误!未定义书签。3.1煤层瓦斯基本参数.........................错误!未定义书签。3.1.1煤层瓦斯含量....................................3.1.2煤层透气性系数....................................3.1.3钻孔瓦斯流量和流量衰减系数.........................3.2矿井瓦斯储量............................................293.3矿井可抽瓦斯量及可抽期..................................303.3.1矿井可抽瓦斯量.....................................3.3.2瓦斯抽放率.........................................3.3.3可抽期.............................................河南理工大学本科毕业设计44瓦斯抽放的必要性和可行性论证.................错误!未定义书签。4.1瓦斯抽放的必要性........................................344.1.1规定..............................................4.1.2通风处理瓦斯量核定...............................4.1.3矿井瓦斯涌出量预测...............................4.2瓦斯抽放的可行性........................................355抽放方法.....................................错误!未定义书签。5.1规定....................................................395.2矿井瓦斯来源分析........................................395.3抽放方法选择............................................405.3.1本煤层瓦斯抽放方法................................5.3.2邻近层瓦斯抽放方法................................5.3.3采空区瓦斯抽放方法................................5.3.4其它情况..........................................5.4钻孔及钻场布置..........................................425.4.1钻场及钻孔布置....................................5.4.2抽放设计..........................................5.5封孔方法................................................455.5.1封孔材料..........................................5.5.2封孔长度..........................................6瓦斯抽放管路系统及设备选型....................错误!未定义书签。6.1抽放管路选型及阻力计算..................................476.1.1规定..............................................6.1.2计算方法.........................................6.2瓦斯抽放泵选型..........................................496.2.1规定..............................................6.2.2选型原则..........................................6.2.3计算方法..........................................6.2.4瓦斯泵类型........................................6.3辅助设备................................................53河南理工大学本科毕业设计57安全技术措施................................................547.1抽放系统及井下移动抽放瓦斯泵站安全措施..................547.2地面抽放瓦斯站安全措施..................................54致谢...........................................................参考文献......................................................附录...........................................................河南理工大学本科毕业设计61引言在日常生活中,人们一谈起沉船、空难、交通事故、火灾等,无不为之大惊失色,殊不知煤矿瓦斯爆炸更是令人惊骇、痛心。据资料统计,在我国煤矿的重大灾害事故中70N以上是瓦斯事故。1990~1999年全国煤矿共发生3人以上死亡事故4002起,共死亡27495人,其中:瓦斯事故2767起,共死亡20625人。占3人以上死亡事故总起数的69.14%,死亡人数的75.01%。2001~2005年2月底,全国煤矿发生一次
本文标题:瓦斯抽放毕业设计
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