急倾斜薄煤层采空区煤自燃和瓦斯爆炸危险区域分布特征  

Distribution Characteristics of Coal Spontaneous Combustion and Gas Explosion Hazard Area in Goaf of Steeply Inclined Thin Coal Seam

作　　者：郝宇 黄阳全[1] 孙福龙 HAO Yu;HUANG Yangquan;SUN Fulong(Chongqing Vocational Institute of Engineering,Chongqing 402260,China;China Coal Technology and Engineering Group Shenyang Research Institute,Shenyang 110016,China;State Key Laboratory of Coal Mine Safety Technology,Fushun 113122,China)

机构地区：[1]重庆工程职业技术学院,重庆402260 [2]煤科集团沈阳研究院有限公司,辽宁沈阳110016 [3]煤矿安全技术国家重点实验室,辽宁抚顺113122

出　　处：《煤矿安全》2019年第10期168-171,共4页Safety in Coal Mines

摘　　要：为提高急倾斜煤层伪斜开采条件下瓦斯与煤自燃综合防治效果,基于煤自燃"三带"划分标准和瓦斯爆炸三角形,建立采空区自燃"三带"分布的数学模型,利用COMSOL Multiphysics 5.2模拟软件,对东林煤矿3409工作面采空区孔隙率、气体浓度、温度等参数进行模拟分析。结果表明:采空区上部孔隙率较大,下部除回风巷道边缘处较大外,其他区域孔隙率相对较低;氧气浓度结合漏风速度共同划分氧化带范围为:在进风侧氧化带宽23.2 m,在回风侧宽37.6 m,高温区域主要集中在回风侧、采空区的下部距离工作面较近区域;采空区上部瓦斯浓度相对较低,下部瓦斯浓度相对较高;瓦斯爆炸危险区域为中间工作面支架处区域范围为爆炸危险区域。In order to improve the comprehensive control effect of gas and coal spontaneous combustion under the condition of pseudo-inclined mining of steeply inclined seam,COMSOL 5.2 software is used to establish the"three zone"distribution model of spontaneous combustion during coal mining area based on coal spontaneous combustion"three zone"division standard and gas explosion triangle.The porosity,gas concentration and temperature parameters of goaf in 3409 working face are simulated and analyzed.The results show that the porosity value of the upper part of the mined-out area is relatively larger.The porosity of the other regions is relatively lower except the edge of the lower air-blown roadway.Oxidation band width on the air inlet side is 23.2 m,37.6 m width on the return air side;the high temperature area is mainly concentrated in the return air side and the lower part of the goaf is close to the working face.The oxidation zone is divided by the oxygen concentration combining with the air leakage velocity.The gas concentration in the upper part of the goaf is relatively lower.The gas explosion hazard area is in the area of the middle face support.

关 键 词：急倾斜薄煤层 COMSOL 5.2多场耦合模拟软件 数值模拟 自燃“三带”分布 瓦斯爆炸危险区域 

分 类 号：TD712[矿业工程—矿井通风与安全]