• 中文核心期刊
  • 中国科技核心期刊
  • RCCSE中国核心学术期刊

高瓦斯易自燃煤层采空区抽采瓦斯方法对比分析

郭建行

郭建行. 高瓦斯易自燃煤层采空区抽采瓦斯方法对比分析[J]. 煤矿安全, 2017, 48(11): 167-170.
引用本文: 郭建行. 高瓦斯易自燃煤层采空区抽采瓦斯方法对比分析[J]. 煤矿安全, 2017, 48(11): 167-170.
GUO Jianhang. Comparative Analysis of Gas Extraction Methods for Goaf in High Gas and Easy Spontaneous Combustion Coal Seam[J]. Safety in Coal Mines, 2017, 48(11): 167-170.
Citation: GUO Jianhang. Comparative Analysis of Gas Extraction Methods for Goaf in High Gas and Easy Spontaneous Combustion Coal Seam[J]. Safety in Coal Mines, 2017, 48(11): 167-170.

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

  • 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。
    Abstract: 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 3D 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.
  • [1] 周爱桃,李志磊,杜锋,等.采空区埋管抽放治理上隅角瓦斯技术研究[J].煤炭技术,2015,34(2):114.
    [2] 赵建安,李峰云,詹智伟.易自燃特厚煤层高瓦斯工作面瓦斯治理技术[J].煤矿安全,2015,46(3):119.
    [3] 刘伟,秦跃平,郝永江,等.“Y”型通风下采空区自然发火数值模拟[J].辽宁工程技术大学学报(自然科学版),2013,32(7):874-879.
    [4] 邵昊,蒋曙光,王兰云,等.尾巷对采空区煤自燃影响的数值模拟研究[J].采矿与安全工程学报,2011,28(1):45-50.
    [5] 卢平,方良才,童云飞,等.深井煤层群首采层Y型通风工作面采空区卸压瓦斯抽采与综合治理研究[J].采矿与安全工程学报,2013,30(3):456-462.
    [6] 时国庆,王德明,奚志林.基于FLUENT对采空区氧气浓度场的数值模拟[J].煤炭科学技术,2009,37(6):76-79.
    [7] 钱鸣高,许家林.覆岩采动裂隙分布的“O”形圈特征研究[J].煤炭学报,1998,23(5):466-469.
    [8] 秦跃平,刘伟.基于非达西渗流的采空区自然发火数值模拟[J].煤炭学报,2012,37(7):1177-1183.
    [9] 吴玉国,邬剑明,张东坡,等.综放工作面连续注氮下采空区气体分布及“三带”变化规律[J].煤炭学报,2011,36(6):964-967.
    [10] 赵文彬,王金凤,闵耀涛,等.注氮条件下采空区自燃带划分及影响区域判定[J].煤炭科学技术,2016,44(3):60-64.
    [11] 朱光丽,赵文彬,张守勇,等.基于数值模拟的1307工作面“三带”分布规律预测研究[J].煤炭工程,2015,47(1):92-94.
计量
  • 文章访问数:  152
  • HTML全文浏览量:  0
  • PDF下载量:  0
  • 被引次数: 0
出版历程
  • 发布日期:  2017-11-19

目录

    /

    返回文章
    返回