薛村煤矿瓦斯抽放方法及抽放系统设计
摘要：本文针对峰峰集团薛村矿煤层存在的瓦斯涌出量大、瓦斯超限严重等问题，通过对瓦斯含量、透气性系数、流量衰减系数的实测，分析论证了薛村煤矿回采工作面煤层瓦斯抽放的必要性与可行性。根据矿井瓦斯涌出来源及构成分析，对回采工作面采用本煤层预抽和高位钻孔的方法进行抽采，掘进工作面采用边掘边抽的抽采方法；结合薛村煤矿工作面的布置，通过对抽放系统管网抽放量、管网阻力计算，优选了抽放系统管网布置，确定了与抽放能力相匹配的瓦斯抽放泵型号及配套电机。
关键词：矿井瓦斯；瓦斯抽放；方案设计；瓦斯涌出量；设备选型。
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The design of gas drainage methods and system of Xuecun mine
Abstract：in this paper, the rule of the town of Dashe,Fengfeng County Xuecun coal mining the second one extended the existing coal gas emission volume, gas gauge and serious issues, through the gas content, permeability coefficient, gas flow meters of drilling Measurement, analysis and appraisal of the Xuecun Coal Mine Coal Seam Gas Drainage necessity and feasibility.According to mine gas emission sources and composition analysis, mining working face layer of parallel holes with pre-drainage, shallow hole mining face extraction, partition type with driving face extraction, advanced extraction and gob buried on the corner Combined drainage tube drainage method; Anlin coal face with the layout, through the drainage volume drainage pipe network, pipeline network resistance calculation, optimization of the drainage pipe network layout, and drainage capabilities identified Model matching and matching gas drainage pump motor.
Keywords：mine gas. gas drainage. scheme design. gas emission quantity. equipment selection.
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目 录
1绪论 ......................................................................................................................................... 1
1.1选题目的及意义 .......................................................................................................... 1 1.2国内外研究现状简述 .................................................................................................. 1 1.3设计依据 ...................................................................................................................... 2 2矿井概况 ................................................................................................................................. 3
2.1井田概况 ...................................................................................................................... 3
2.1.1交通地理位置 ................................................................................................... 3 2.1.2气象 ................................................................................................................... 3 2.1.3水文情况 ........................................................................................................... 4 2.1.4地震 ................................................................................................................... 4 2.2 井田地质特征 ............................................................................................................. 4
2.2.1 地质构造 .......................................................................................................... 4 2.2.2含煤地层及岩层 ............................................................................................... 7 2.2.3煤层瓦斯、自然及爆炸倾向性 ....................................................................... 7 2.2.4水文地质 ........................................................................................................... 8 2.3矿井开拓、开采概况 .................................................................................................. 9 2.4矿井通风系统概况 ...................................................................................................... 9 3矿井瓦斯赋存情况 ............................................................................................................... 10
3.1煤层瓦斯基本参数 .................................................................................................... 10
3.1.1煤层瓦斯含量 ................................................................................................. 10 3.1.2煤层透气性系数 ............................................................................................. 10 3.1.3钻孔瓦斯流量和流量衰减系数 ......................................................................11 3.2矿井瓦斯储量 .....................................................................................................11 3.3矿井可抽瓦斯量及可抽期 .........................................................................................11
3.3.1矿井可抽瓦斯量 ..............................................................................................11 3.3.2瓦斯抽采率 ..................................................................................................... 12 3.3.3可抽期 ............................................................................................................. 12
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4瓦斯抽放的必要性和可行性论证 ....................................................................................... 13
4.1瓦斯抽放的必要性 .................................................................................................... 13
4.1.1规定 ................................................................................................................. 13 4.1.2通风处理瓦斯量核定 ..................................................................................... 13 4.1.3矿井瓦斯涌出量预测 ..................................................................................... 14 4.2瓦斯抽放的可行性 .................................................................................................... 17 5抽放方法 ............................................................................................................................... 19
5.1规定 ............................................................................................................................ 19 5.2瓦斯来源分析 ............................................................................................................ 19 5.3抽放方法选择和钻场布置 ........................................................................................ 19
5.3.1抽采方法选择依据及钻场布置依据 ............................................................. 19 5.3.2抽采方法选择 ................................................................................................. 21 5.4抽采钻孔的密封 ........................................................................................................ 24
5.4.1封孔深度 ......................................................................................................... 24 5.4.2封孔材料 ......................................................................................................... 24 5.4.3封孔工艺 ......................................................................................................... 24
6抽采管路系统及选型计算 ................................................................................................... 27
6.1抽放管路选型及阻力计算 ........................................................................................ 27
6.1.1规定 ................................................................................................................. 27 6.1.2计算方法 ......................................................................................................... 27 6.2瓦斯抽放泵选型 ........................................................................................................ 31
6.2.1规定 ................................................................................................................. 31 6.2.2选型原则 ......................................................................................................... 31 6.2.3计算方法 ......................................................................................................... 31 6.2.4瓦斯泵类型 ..................................................................................................... 33 6.3辅助设备 .................................................................................................................... 34 7安全技术措施 ....................................................................................................................... 36
7.1井下抽放系统安全措施 ............................................................................................ 36
7.1.1抽放钻场、钻孔施工的安全措施 ................................................................. 36 7.1.2抽放管路管理安全技术措施 ......................................................................... 38
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7.2瓦斯、煤尘爆炸事故发生后的应急措施 ................................................................ 38 8瓦斯的综合利用与配套设施 ............................................................................................... 40
8.1瓦斯的利用 ................................................................................................................ 40 8.2配套设施 .................................................................................................................... 40
8.2.1供电、照明及通信 ......................................................................................... 40 8.2.2 给排水、采暖与通风 .................................................................................... 40 8.2.3防雷设施 ......................................................................................................... 41 8.3监测监控系统 ............................................................................................................ 41 8.4环保 ............................................................................................................................ 41 9抽放瓦斯管理 ....................................................................................................................... 43
9.1瓦斯抽放管理及规章制度 ........................................................................................ 43
9.1.1组织管理 ......................................................................................................... 43 9.1.2瓦斯抽放组织机构管理 ................................................................................. 43 9.1.3采空区抽放管道的拆装 ................................................................................. 43 9.1.4抽放瓦斯管路管理 ......................................................................................... 44 9.2常用记录及报表样式 ................................................................................................ 44 致谢 .......................................................................................................................................... 45 参考文献 .................................................................................................................................. 46
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