摘要
为防止寸草塔煤矿22煤层煤自燃,对22煤层采空区自燃"三带"进行划分.通过现场束管监测获得采空区内氧气浓度分布,并基于氧浓度的"三带"划分标准,得出22煤层采空区自燃"三带"范围,即运胶顺槽:散热带<51m,自燃带51~147m,窒息带>147m;回风顺槽:散热带<43m,自燃带43~141m,窒息带>141m.使用Fluent数值模拟软件模拟不同配风量和瓦斯抽放对自燃"三带"的分布影响,得出了配风量越大、抽放管道进入采空区深度越深、抽采负压越大,氧化带宽度也随之增大,煤自燃的危险性越大.
In order to prevent the 22 coal seam coal in Cuncaota Coal Mine from self-ignition, the “three zones” of spontaneous combustion of goaf in 22 coal seams are divided. Through the on-site beam tube monitoring, the oxygen concentration distribution in the goaf is obtained. Based on the “three-zones” division standard of oxygen concentration, the “three-zones” range of spontaneous combustion of the 22 coal seam goaf is obtained. That is, the transportation lane: heat dissipation belt <51 m, self-ignition belt 51~147 m, suffocation belt >147 m;return airway: heat dissipation belt <43 m, spontaneous combustion belt 43~141 m, suffocation belt>141 m. Fluent numerical simulation software is used to simulate the distribution of different air distribution and gas drainage on the “three belts” of spontaneous combustion. It is concluded that the larger the air distribution volume, the deeper the depth of the drainage pipeline into the goaf, and the greater the negative suction pressure. The width of the oxidized zone also increases, and the risk of spontaneous combustion of coal increases, too.
作者
张淼
王涛
鲁义
陈世强
丁仰卫
Zhang Miao;Wang Tao;Lu Yi;Chen Shiqiang;Ding Yangwei(Shandong Lutai Holding Group Co., Ltd., Luwa Coal Mine, Jining 272350, China;School of Resources, Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan 411201, China;Work Safety Key Lab on Prevention and Control of Gas and Roof Disasters for Southern Coal Mines, Hunan University of Science and Technology, Xiangtan 411201, China)
出处
《矿业工程研究》
2019年第2期63-69,共7页
Mineral Engineering Research
基金
国家自然科学基金资助项目(51604110
51774135
51504093
51874131)
湖南省自然科学基金青年科学基金项目(2017JJ3074)
中国博士后科学基金资助项目(2017M612558
2018T110831)
教育部高等学校特色专业建设点项目(TS11624)
关键词
采空区
煤自燃
“三带”划分
数值模拟
gaoaf
coal spontaneous combustion
“Three-zones” division
numerical simulation
