采空区自燃危险区域数值模拟  

Spontaneous combustion hazard area in goaf based on numerical simulation

作　　者：高东 郭立稳 王福生[1,2] 王东 GAO Dong;GUO Liwen;WANG Fusheng;WANG Dong(College of Mining Engineering, North China University of Science and Technology, Tangshan, Heibei 063210, China;Mining Development and Safety Technology Key Lab of Hebei Province, Tangshan, Heibei 063210, China)

机构地区：[1]华北理工大学矿业工程学院,河北唐山063210 [2]河北省矿业开发与安全技术重点实验室,河北唐山063210

出　　处：《中国科技论文》2022年第1期78-84,共7页China Sciencepaper

基　　金：国家自然科学基金资助项目(51974128);华北理工大学研究生创新项目(2019B27)。

摘　　要：为了准确划分采空区自燃危险区域,运用现场采空区热电偶监测和束管检测,得出采空区内进风巷一侧的温度及氧气体积分数的分布规律;采用计算流体动力学(computational fluid dynamics,CFD)数值模拟技术,利用相似原理建立了不同孔隙率下的采空区三维立体数学模型,并运用灰色关联理论将不同孔隙率下的模拟结果与现场实测数据进行关联性分析。结果表明:当采空区孔隙率为类型2时,与现场的氧气体积分数分布耦合度最高,关联度为0.9000;依据该数值模拟结果的氧气体积分数分布划分了采空区自燃危险区域,该区域为双弧形区域,处于采空区距工作面进风侧30~80 m,回风侧10~40 m处。In order to divide the spontaneous combustion hazard area in goaf more accurately,the rule of temperature and oxygen concentration on the side of intake airway in goaf were analyzed by thermocouple thermometry and bundle tube monitoring system.Then three-dimensional mathematical model of the goaf under different porosities was established by computational fluid dynamics(CFD)numerical simulation,and the simulated results with the experimental results was correlated by the grey relational theory.According to the numerical simulation results,the spontaneous combustion dangerous area of goaf was divided.The results show that when the porosity of goaf was Type 2,the coupling degree with the oxygen concentration distribution on site is the highest(0.9000).According to the numerical simulation results,the goaf spontaneous combustion hazard area was divided.It shows that this area is a double-arc area,locates 30-80 m from the intake side of the goaf to the working face,and 10-40 m from the return side.

关 键 词：计算流体动力学数值模拟 孔隙率 灰色关联 氧气体积分数 自燃危险区域 

分 类 号：TD752[矿业工程—矿井通风与安全]