摘要
应用多孔介质流体动力学理论建立了综放采场三维流场数学模型，采用上游加权多单元均衡方法对三河尖煤矿７１２１下综放采场流场的压力和风速分布进行了数值计算，压力分布的计算结果与模型实验实测结果达到较好的吻合；根据７１２１下综放采空区的实测自燃“三带”范围（不燃带７～１４ｍ，可燃带１４～７０ｍ，窒息带大于７０ｍ）确定了该工作面采空区可能自燃带风速范围为０３３～０１２ｍｍｉｎ．
Based on the theory of fluid kinetics for porous medium, a mathematical model for 3D airflow in a sublevel caving field is established. Distribution of air pressure and velocity in No7121 sublevel caving face in Sanhejian Mine is calculated by use of weighted upstream multielement balance numerical method. The calculated air pressure distribution fits well with the measured data from the model test. Based on the range of “3zones” of spontaneous combustion measured in the minedout area of No7121 face (nonignition zone 7～14 m, ignitable zone 14～70 m, suffocative zone over 70 m), the range of air velocity in the ignitable zone of this face is determined to be 033～012 mmin.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
1998年第3期258-261,共4页
Journal of China Coal Society
关键词
综采
放顶煤
采场流场
数学模型
自然发火
采煤
mechanized sublevel caving, flow field in the workings, mathematical model, “three zones” of spontaneous ignition
