二场叠加原理的采空区自然发火危险区判定研究  

Determination of Spontaneous Combustion Hazard Zone in Goaf based on Two-field Superposition Principle

作　　者：高科[1,2] 刘泽毅 王东[1,2] 马昀懿 李英娜 GAO Ke;LIU Zeyi;WANG Dong;MA Junyi;LI Yingna(College of Safety Science and Engineering,Liaoning Technical University,Huludao 125105,China;Key Laboratory of Mine Thermodynamic Disasters and Control of Ministry of Education,Liaoning Technical University,Huludao 125105,China)

机构地区：[1]辽宁工程技术大学安全科学与工程学院,辽宁葫芦岛125105 [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

出　　处：《矿业安全与环保》2018年第5期12-15,共4页Mining Safety & Environmental Protection

基　　金：国家自然科学基金项目(51404126);辽宁省教育厅项目(一般项目)(LJYL003);中国博士后科学基金面上项目(2017M611253)

摘　　要：为有效解决综放工作面采空区自然发火的问题,采用CFD技术对采空区流场进行数值计算,以氧气体积分数及速度的叠加场作为采空区自然发火危险区域划分标准,分析了自然发火危险区与工作面供风量的关系,以及注氮和瓦斯抽采对自然发火危险区的影响。研究结果显示,随着工作面供风量增大,氧化带的形态并未发生改变,只是整体后移,但呈"L"形的自然发火危险区域面积增大,加大了发火危险;注氮后,自然发火危险区主要集中在靠近工作面运输巷位置,为一狭长区域;瓦斯抽采对自然发火危险区影响较大,随着抽采量增加,自然发火危险区域面积明显增大。In order to effectively solve the problem of spontaneous ignition in goaf of fully mechanized caving face,CFD technology was used to calculate the flow field in goaf.Taking the superposition field of oxygen volume fraction and velocity as the standard for the division of spontaneous combustion hazard zone,the relation between the spontaneous combustion hazard zone and the ventilation quantity of working face was analyzed,and the influence of nitrogen injection and gas extraction on spontaneous combustion hazard zone was also analyzed.The results show that the morphology of the oxidation zone has no change with the increase of air supply in the working face,but moves back as a whole,however,the area of spontaneous combustion hazard zone of“L”type increases,which increases the ignition risk.After nitrogen injection,the spontaneous combustion hazard zone is mainly located near the transportation lane of working face,which is a long and narrow area;gas extraction has great influence on spontaneous combustion hazard zone,the spontaneous combustion hazard zone increases obviously with the increase of extraction.

关 键 词：综放工作面 采空区 二场叠加原理 自然发火 数值模拟 

分 类 号：TD752[矿业工程—矿井通风与安全]