晋牛矿1303综放面采空区注氮方案研究及数值模拟  

Research and numerical simulation on nitrogen injection scheme in goaf of 1303 fully mechanized caving face in Jinniu mine

作　　者：贾宝山[1,2] 汪伟[1,2] 祁云[1,2] 孙勇 李守国[1,3] JIA Baoshan;WANG Wei;QI Yun;SUN Yong;LI Shouguo(College of Safety Science and Engineering,Liaoning Technical University,Fuxin Liaoning 123000,China;Key Laboratory of Mine Thermodynamic Disasters and Control of Ministry of Education,Liaoning Technical University,Huludao Liaoning 125105,China;State Key Laboratory of Coal Mine Safety Technology,CCTEG Shenyang Research Institute,Shenyang Liaoning 113112,China)

机构地区：[1]辽宁工程技术大学安全科学与工程学院,辽宁阜新123000 [2]矿山热动力灾害与防治教育部重点实验室辽宁工程技术大学,辽宁葫芦岛125105 [3]煤科集团沈阳研究院有限公司煤矿安全技术国家重点实验室,辽宁沈阳113112

出　　处：《中国安全生产科学技术》2018年第3期82-88,共7页Journal of Safety Science and Technology

基　　金：国家自然科学基金项目(51174109);国家"十二五"科技支撑计划项目(2011ZX05041-003)

摘　　要：为了合理设计采空区注氮防灭火方案,以晋牛煤矿1303综放工作面为研究对象,通过在采空区进、回风侧布置束管监测系统,连续测定采空区气体浓度变化,划分采空区自燃"三带"分布区域,并基于采空区自燃"三带"划分标准和数值模拟的方法,利用流体力学COMSOL计算软件,研究不同注氮量、注氮位置下采空区氧化自燃带的分布规律。研究结果表明:注氮量和注氮位置参数的变化,对氧化自燃带上界限的影响并不显著,而对氧化自燃带的下界限影响比较显著;最合适的注氮位置应该在距离切顶线30 m左右,运用Origin软件得出注氮量与氧化自燃带宽度呈指数关系,由拟合式计算出最优注氮量为386 m^3/h,此时氧化自燃带的宽度为31.5 m。In order to reasonably design the scheme of fire prevention and control with nitrogen injection in the goaf,taking the 1303 fully mechanized caving face in Jinniu coal mine as the research object,the change of gas concentration in the goaf was measured continuously through arranging the beam tube monitoring system at the inlet air side and return air side of the goaf,then the distribution area of the spontaneous combustion"three zones"in the goaf was divided.Based on the division standard of the spontaneous combustion"three zones"in the goaf and the numerical simulation method,the distribution laws of oxidation spontaneous combustion zone in the goaf under different nitrogen injection quantities and positions were studied by using the fluid dynamics calculation software COMSOL.The results showed that the change of nitrogen injection quantity and position had no significant influence on the upper limit of the oxidation spontaneous combustion zone,and had significant influence on the lower limit of the oxidation spontaneous combustion zone.The most appropriate nitrogen injection position should be about 30 m away from the top cut line.It was obtained that there existed an exponential relationship between the nitrogen injection quantity and the width of the oxidation spontaneous combustion zone by using Origin software,and the optimum nitrogen injection rate was 386 m 3/h calculated by the fitting formula,at the moment,the width of the oxidation spontaneous combustion zone was 31.5 m.

关 键 词：采空区 氧化自燃带 数值模拟 注氮防灭火 

分 类 号：X936[环境科学与工程—安全科学]