摘要
为探究深部邻近采空区多漏风通道对煤自燃“三带”的影响,以唐山矿0291工作面为工程背景,采用FLUENT软件模拟多漏风环境采空区内氧气浓度的分布规律,并依此划分不同漏风条件下采空区自燃危险区域;在工程现场设置束管监测装置监测采空区内氧气浓度,依据监测数据对模拟结果进行现场验证。模拟结果表明:随工作面推进,采空区上下隅角相邻区域形成多漏风通道且漏风量增加,漏风导致采空区散热带和氧化带向深部运移,其进、回风巷氧气浓度大于8%的范围由64、40m增至101、80.2m。现场验证表明:束管监测工作面采空区氧化带宽度与数值模拟结果误差小于5%,模拟结果得以验证。
In order to explore the influence of multiple air leakage channels in the deep adjacent goaf on the coal spontaneous combustion“three-zone”,0291 working face of Tangshan Mine was taken as the engineering background and FLUENT software was used to simulate the distribution rule of the oxygen concentration in the goaf under the multiple air leakage environment.The spontaneous combustion risk areas in the goaf under different air leakage conditions were divided according the distribution rule.The beam tube monitoring device was set up in the project site to monitor the oxygen concentration in the goaf,and the simulation results were verified on site according to the monitoring data.The simulation results show that with the advance of the working face,multiple air leakage channels are formed in the adjacent areas at the upper and lower corners of the goaf and the air leakage increases,and the air leakage makes the dispersion zone and oxidation zone of the goaf move to the depth,and the distance with the oxygen concentration higher than 8%in the intake and return airway increases from 64m and 40m to 101m and 80.2m.Field verification shows that the error between the oxidation zone width in the working face goaf monitored by the beam tube and that by the numerical simulation is less than 5%,and the simulation results are verified.
作者
张九零
白阳
范酒源
李江涛
陈建广
ZHANG Jiuling;BAI Yang;FAN Jiuyuan;LI Jiangtao;CHEN Jianguang(College of Emergency Management and Safety Engineering,North China University of Science and Technology,Tangshan Hebei 063210,China;Hebei Key Laboratory of Mine Development and Safety Technology,Tangshan Hebei 063210,China)
出处
《安全》
2024年第2期50-57,共8页
Safety & Security
基金
河北省自然科学基金项目(E2022209101)
唐山市基础研究科技计划项目(22130209H)。
关键词
邻近采空区
多漏风通道
自燃“三带”
氧气浓度
数值模拟
束管监测
adjacent goaf
multiple air leakage channels
spontaneous combustion“three-zone”
oxygen concentration
numerical simulation
beam tube monitor
