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《Coal Science and Technology》 2017-01
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Study on nitrogen injection technology to replace gas in goaf of upper slice mining face while slice mining

Fan Kesong;Shen Baohong;Wang Dongpan;Jing Qinghe;Zhang Zhen;Mining and Design Branch,China Coal Research Institute;Department of Mining and Design,Tiandi Science and Technology Company Limited;China Coal Research Institute;Jalainur Coal Industry Company Limited;  
When a fully-mechanized upper slice mining was conducted in the bottom slice of the extreme thick seam in Lingquan Mine,according to the problem occurred that the gas in the water drainage gateway of the upper slice was easily run into the up gateway of the bottom slice.A borehole drilling was conducted from the up gateway in the bottom slice to the water drainage gateway in the top slice in order to make the nitrogen injection to replace the gas.CFD numerical value was applied to simulate the migration law of gas in the water drainage gateway in the upper slice and the goaf.In order to have the rational nitrogen injection parameters,the variation of gas concentration in the water drainage gateway with different nitrogen injection rate and the nitrogen injection spacing was analyzed.The results showed that when the parameters of the nitrogen injection varied,the distribution law of gas in the water drainage gateway would have differences.When the borehole space was 30 m and the nitrogen injection amount was 800 m~3/h,the replaced gas effect was best.Finally,the rational nitrogen injection parameters should be applied to the industrial site and the results showed that in the bottom slice mining,there was no gas over limit phenomenon occurred.
【Fund】: 国家自然科学基金青年基金资助项目(51504135);; 煤炭科学研究总院科技创新基金资助项目(2015ZYJ001);; 中国煤炭科工集团公司科技创新基金资助项目(2014MS034)
【CateGory Index】: TD712
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【Citations】
Chinese Journal Full-text Database 10 Hits
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【Co-citations】
Chinese Journal Full-text Database 9 Hits
1 JIA Baoshan;WANG Wei;QI Yun;SUN Yong;LI Shouguo;College of Safety Science and Engineering,Liaoning Technical University;Key Laboratory of Mine Thermodynamic Disasters and Control of Ministry of Education,Liaoning Technical University;State Key Laboratory of Coal Mine Safety Technology,CCTEG Shenyang Research Institute;;Research and numerical simulation on nitrogen injection scheme in goaf of 1303 fully mechanized caving face in Jinniu mine[J];中国安全生产科学技术;2018-03
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Chinese Journal Full-text Database 10 Hits
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7 Bao-hua YANG;Ai-xiang WU;Xiu-xiu MIAO;Jin-zhi LIU;Information Science and Engineering School,Hunan International Economics University;Civil and Environment Engineering School,University of Science and Technology Beijing;College of Information Technology,Shanghai Ocean University;;3D characterization and analysis of pore structure of packed ore particle beds based on computed tomography images[J];Transactions of Nonferrous Metals Society of China;2014-03
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