高瓦斯易自燃煤层采空区抽采瓦斯方法对比分析  

Comparative Analysis of Gas Extraction Methods for Goaf in High Gas and Easy Spontaneous Combustion Coal Seam

作　　者：郭建行 

机构地区：[1]煤炭科学技术研究院有限公司安全分院,北京100013 [2]煤炭资源高效开采与洁净利用国家重点实验室(煤炭科学研究总院),北京100013 [3]北京市煤矿安全工程技术研究中心,北京100013

出　　处：《煤矿安全》2017年第11期167-170,共4页Safety in Coal Mines

摘　　要：为了研究高瓦斯易自燃煤层采空区瓦斯与火灾复合灾害共存的情况下抽采瓦斯对采空区遗煤自然发火的影响,以彬长矿区文家坡煤矿高瓦斯易自燃的首采4101工作面为研究对象,利用ANSYS三维可视化数值模拟软件,建立了采空区漏风流场的数值模型,定量对比研究了高位钻孔抽采、邻近巷抽采和埋管抽采3种不同抽采瓦斯方法下采空区瓦斯浓度分布、采空区漏风流场以及采空区"三带"宽度范围变化的差异性。研究结果表明:采用高位钻孔抽采方法时采空区漏风流场和自燃带宽度范围在采空区深部30 m范围内的影响和变化都相对较小,能够有效的减少采空区瓦斯与火灾复合灾害的发生,从而对工作面的安全高效回采提供保障。In order to study the effect of gas drainage on easy spontaneous combustion of residual coal in goaf under the condition of coexistence of complex disasters in the goaf of coal seam with high gas and easy spontaneous combustion, taking the first mining of 4101 working face in Wenjiapo coalmine of Binchang mining district as the research object, using 3 D visualization of ANSYS numerical simulation technique, the study established the numerical model of air leakage flow in working face goaf, and quantitatively compared the difference of gas concentration distribution of goaf, air leakage flow field and spontaneous combustion zone width variation under three different drainage methods including high drilling extraction, adjacent lane extraction and buried pipe extraction. The results of the study show that the technique of high drilling extraction is the best under the same extraction volume, which has relatively small influence on leakage field and the change of spontaneous combustion zone width in the bottom of goaf within 30 m. It can reduce the composite disasters of gas and fire and provide effective guarantee for the working face mining with safety and efficiency.

关 键 词：高瓦斯 易自燃 抽采方法 自燃带宽度 数值模拟 复合灾害 

分 类 号：TD712[矿业工程—矿井通风与安全]