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综放采空区抽放条件下自燃"三带"分布规律
引用本文:张辛亥,陈曦,李艳增.综放采空区抽放条件下自燃"三带"分布规律[J].西安科技大学学报,2008,28(2):279-283.
作者姓名:张辛亥  陈曦  李艳增
作者单位:西安科技大学,能源学院,陕西,西安,710054;西安科技大学,教育部西部矿井开采及灾害防治重点实验室,陕西,西安,710054
摘    要:主要从抽放条件下综放采空区的特点出发,对综放采空区抽放条件下的自燃危险区域进行划分。利用大型煤自然发火实验台,对铜川下石节煤样自燃特性参数(耗氧速度、放热强度和煤层最短自然发火期)进行了实验测定,为抽放条件下综放采空区渗流场的数学模拟提供了基础数据;建立了抽放条件下采空区渗流、氧化和扩散的数学模型,并利用数值模拟对该模型进行求解,得到了抽放条件下综放采空区内的氧浓度分布和漏风强度变化规律;利用数值模拟得到的氧浓度和漏风强度分布结果,结合自燃特性参数,对抽放条件下自燃"三带"进行划分,确定了综放工作面的极限推进速度,为高瓦斯矿井采空区早期自然发火预测及火区治理提供依据。

关 键 词:瓦斯抽放  综放采空区  数值模拟

Distribution of spontaneous combustion "three-zone" in fully mechanized golf under the condition of gas drainage
ZHANG Xin-hai,CHEN Xi,LI Yan-zeng.Distribution of spontaneous combustion "three-zone" in fully mechanized golf under the condition of gas drainage[J].JOurnal of XI’an University of Science and Technology,2008,28(2):279-283.
Authors:ZHANG Xin-hai  CHEN Xi  LI Yan-zeng
Abstract:Based on the characteristics of fully mechanized golf under the condition of gas drainage,the spontaneous combustion danger zone of fully mechanized golf under the condition of gas drainage is judged.By making use of the self-ignition experiment oven,three important parameters of oxygen consumption,intensity of heat transmission and the shortest coal ignition of the coal sample of Xiashijie mine in Tongchuan city are obtained,which can provide basic data for numeric simulation of seepage filed in the gob under the condition of gas drainage.A mathematical model of seepage,oxygenation and diffusion in the gob under the condition of gas drainage are set up,and numeric simulation of oxygen concentration and intensity of air leakage can be obtained.The minimum moving velocity of the workface not to cause spontaneous combustion are determined.The study provides guidance for prediction and prevention of spontaneous combustion in high gas coal mine.
Keywords:gas drainage  gob of fully mechanized top-coal workface  numeric simulation
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