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1、 平煤六矿地面固定瓦斯抽采系统设计摘要：煤与瓦斯突出，瓦斯爆炸都是煤矿井下严重的灾害，并且很多其他事故的发生都和瓦斯分不开，平煤六矿的工作面瓦斯涌出量和矿井的瓦斯涌出量都远大于规定中所要求的标准，而且从2005年起，平煤六矿在在采掘过程中曾发生多次煤与瓦斯突出，从保障煤矿安全生产的意义上来讲，六矿必须建立地面抽采本站对矿井进行瓦斯抽采。 基于此，本设计以平煤六矿丁5-6煤层为对象，通过前期收集、整理、分析该矿的相关资料，对该矿的瓦斯抽采系统进行了设计，设计内容如下： （1）根据矿井瓦斯涌出量预测方法（AQ 1018-2006）选择分源预测法对六矿进行矿井瓦斯涌出量预测。预测结果是丁5-6煤层工
2、作面瓦斯涌出量为 25.57m3/min，掘进工作面瓦斯涌出量为5.73m3/min。根据煤矿安全规程和煤矿瓦斯抽采工程设计规范论证了瓦斯抽采的必要性，从煤层透气性系数、钻孔瓦斯流量衰减系数方面论证瓦斯抽采的可行性，同时，对矿井瓦斯储量，可抽瓦斯量进行计算。 （2）通过分析瓦斯涌出的来源及构成得出：回采区瓦斯涌出量比例高达68%，掘进区瓦斯涌出量占 15.2%，已采区瓦斯涌出量占 16.8%。所以回采区的瓦斯抽采是重中之重。本设计的开采层瓦斯抽放方法为本层预抽方法，采用顺层布孔方式。回采区域采用顺层上下钻孔预抽区域瓦斯，掘进区域采用顺层钻孔预抽条带瓦斯，采空区采用上隅角插管抽放方法，并绘制了抽
3、采示意图和煤层瓦斯抽采系统图。 （3）根据煤矿瓦斯抽采工程设计规范（GB50471-2008）3.2.13.2.1 要求，本设计需分别布置高负压和低负压瓦斯抽采系统。根据管路的瓦斯纯量及瓦斯浓度，计算得出主管、分路、支管的管径；根据管路的长度及管径等参数计算出管路的摩擦阻力，进而计算出高负压抽采管路的总阻力为11892Pa，低负压抽采管路的总阻力为 9284Pa。根据需求选择合适的抽采泵，高负压泵型号为：2BEC-52；低负压泵型号为：2BEC-52。 （4）根据相关规定，制定了抽采系统及抽采泵站的安全措施及管理方案。关键词：煤与瓦斯突出 瓦斯涌出量预测 抽采方法 管路 设备选型1Gas Dr
4、ainage System With ground-fixed pump station Design of No.6 Mine in PingdingshanAbstract:Coal and gas outburst and gas explosion are serious coal mine disasters, and many other accidents are inseparable with gas, No.6 mine in Pingdingshan working face gas emission and coal mine gas emission is great
5、er than the required standard of regulations. Since 2005, Coal and gas outburst often happened in the process of tunnelling in No.6 mine, In the sense of guaranteeing the coal mine production safety, gas drainage system with ground-fixed pump station must be established in No.6 mine. Based on these,
6、 this design took NO.6 mine in Pingdingshan D5-6 coal seam as the object. With collecting, collating, analyzing relevant information on the coal mine, I designed the gas drainage system. The contents are as follows:(1) According to The Mine Gas Emission Quantity Prediction Method (AQ 1018-2006), sel
7、ect different-source prediction method to predict mine gas emission of NO.6 mine in Pingdingshan. The results are as follows: the gas emission of coal face is 25.57m3/min and the emission of the tunneling working surface is 5.73m3/min. According to the coal Mine Safety Engineering 145 content, demon
8、strate the necessity of the coal mine gas drainage; with gas permeability coefficient of coal seam and damping factor of gas flow-rate per hole , demonstrate the feasibility of the coal mine gas drainage. At the same time, calculate gas reserves, drainable gas quantity and pumping period.(2) With th
9、e analysis of gas emission sources and structure, the result are obtained: up to 68% of gas emission quantity springs from the stope, and the tunneling area accounts for 15.2% of gas emission, and the gas emission of the mined area accounts for 16.8%. Accordingly, the gas extraction of the mining ar
10、ea is a top priority. Gas drainage methods include gas drainage from extracting seam, and gas drainage from gob. The gas drainage from extracting seam of the design is gas drainage from virgin coal seam, with crossing holes and holes drilled along seam. The gas drainage from stope is gas drainage fr
11、om virgin coal seam, with holes drilled along seam, and the gas drainage is gas pre-drainage along seam bedding strip, with holes drilled along seam. Now, the gas drainage from gob is intubation in upper corner extraction . According to the Interim Provisions Standard of Coal Mine Gas Extraction, ga
12、s drainage negative pressure without pressure relief is 15KPa, gas drainage with pressure relief negative pressure is 8KPa. According to the attenuation coefficient of gas drainage borehole , calculate the effective pumping drilling time. And gas extraction and gas drainage system schematic diagram.
13、 (3) According to mine gas drainage engineering design specifications (GB50471-2008) 3.2.1 3.2.3 requirements, the mine needs to arrange gas drainage system. According to the values of gas content and gas concentration in pipeline, calculated the diameter of main pipeline, branch, branch pipe; base
14、on line length and diameter and other parameters to calculate the friction resistance of pipe, then calculate the high negative pressure is 11892Pa and low negative pressure is 9284Pa. According to the demand, choose suitable drainage pumps, the type of high negative press pump: 2BEC52; the type of
15、low negative press pump: 2BEC52. Finally, economical calculation is performed.(4) According to the relevant regulations, formulate safety measures and management scheme of the pumping system and pumping station.Keywords：Coal and gas outburst Prediction of mine gas emission rate Drainage methodDraina
16、ge pipeline Equipment selection3目 录1引言11.1 研究的背景与意义11.2 国内外综述11.3 抽采系统设计的主要内容21.4 研究方法与技术路线32矿井概况42.1 井田位置和交通42.2 井田境界42.3 井田储量52.4 开采煤层及煤质62.5 主要生产系统72.6 矿井生产和开拓能力82.7 矿井通风92.8 矿井瓦斯基本参数93 瓦斯涌出量预测和抽采系统的选择123.1瓦斯涌出量分源预测法123.2 预测基础数据123.3 回采工作面瓦斯涌出量预测133.4 掘进工作面瓦斯涌出量预测153.5生产采区瓦斯涌出量预测173.6 矿井瓦斯涌出量183.7 建立地面固定抽采系统的必要性184 瓦斯抽采设计参数204.1 煤层瓦斯储量20
