J型通风工作面采空区漏风与瓦斯浓度分布规律研究
|
摘要
为获得工作面不同供风量时工作面漏风及采空区瓦斯分布规律,为工作面瓦斯治理提供理论支持,利用Fluent数值模拟方法对王庄矿8103工作面在供风量分别为2198m~3/min、2350m~3/min、2500m~3/min、2650m~3/min下采空区漏风及瓦斯浓度分布特征进行模拟与分析,得到了沿工作面全程的漏风分布及采空区瓦斯分布。分析结果表明:随着工作面供风量增加,工作面向采空区的漏风量逐渐增加;采空区内瓦斯浓度逐渐降低;上隅角瓦斯浓度不断降低,并且当工作面风量提高到2350m~3/min时,上隅角瓦斯浓度降低到1%以下。
In order to obtain the air leakage of working face and the gas distribution law of goaf,and provide theoretical support for gas control of working face,the distribution characteristics of air leakage and gas concentration in the goaf of Wangzhuang 8103 working face under the conditions of 2198 m~3/min,2350 m~3/min,250 m~3/min and 2650 m~3/min air supply were simulated by FLUENT numerical simulation,and the goaf air leakage and gas distribution along the working face were analyzed. The results show that with the increase of working face air supply,the amount of air leakage in working face gradually increased; the gas concentration in goaf decreased gradually; the gas concentration in upper corner decreased continuously; and when the working face air volume increased to 2350 m~3/min,gas concentration in the upper corner reduced below 1%.
In order to obtain the air leakage of working face and the gas distribution law of goaf,and provide theoretical support for gas control of working face,the distribution characteristics of air leakage and gas concentration in the goaf of Wangzhuang 8103 working face under the conditions of 2198 m~3/min,2350 m~3/min,250 m~3/min and 2650 m~3/min air supply were simulated by FLUENT numerical simulation,and the goaf air leakage and gas distribution along the working face were analyzed. The results show that with the increase of working face air supply,the amount of air leakage in working face gradually increased; the gas concentration in goaf decreased gradually; the gas concentration in upper corner decreased continuously; and when the working face air volume increased to 2350 m~3/min,gas concentration in the upper corner reduced below 1%.
引文
[1]王凯,俞启香,缪协兴,等.综放采场J型通风系统治理高瓦斯涌出的研究[J].中国矿业大学学报,2004,33(4):3-7.
[2]王慧堂.处理上隅角瓦斯的J型通风系统[J].矿业安全与环保,2005,32(3):62-63.
[3]刘卫群,缪协兴.综放开采J型通风采空区渗流场数值分析[J].岩石力学与工程学报,2006,25(6):1152-1158.
[4]刘晟,赵耀江,刘玉龙,等.“J”型通风系统采空区瓦斯运移与漏风规律的相似模拟[J].煤矿安全,2013,44(9):28-30.
[5]蔡佳文,杨圣强,焦汉林,等.“U+L”型通风系统下采空区三维流场实验研究[J].煤炭工程,2016,48(8):89-92.
[6]王凯,吴伟阳.J型通风综放采空区流场与瓦斯运移数值模拟[J].中国矿业大学学报,2007,36(3):277-282.
[7]何磊,杨胜强,孙祺,等.Y型通风下采空区瓦斯运移规律及治理研究[J].中国安全生产科学技术,2011,2(2):50-54.
[8]高建良,刘明信,徐文.高抽巷抽采对采空区漏风规律的影响研究[J].河南理工大学学报(自然科学版),2015,34(2):141-145.
[9]王付清,王立伟.U型与J型通风采空区流场数值模拟研究[J].山西焦煤科技,2014,4(4):42-45.
[10]杨明,张帆.煤层倾角对采空区流场及瓦斯分布的影响研究[J].中国安全生产科学技术,2014,11(11):34-40.
[11]陶占宇.留巷段漏风对采空区瓦斯运移规律影响的数值模拟研究[J].煤炭工程,2014,46(11):102-105.
[2]王慧堂.处理上隅角瓦斯的J型通风系统[J].矿业安全与环保,2005,32(3):62-63.
[3]刘卫群,缪协兴.综放开采J型通风采空区渗流场数值分析[J].岩石力学与工程学报,2006,25(6):1152-1158.
[4]刘晟,赵耀江,刘玉龙,等.“J”型通风系统采空区瓦斯运移与漏风规律的相似模拟[J].煤矿安全,2013,44(9):28-30.
[5]蔡佳文,杨圣强,焦汉林,等.“U+L”型通风系统下采空区三维流场实验研究[J].煤炭工程,2016,48(8):89-92.
[6]王凯,吴伟阳.J型通风综放采空区流场与瓦斯运移数值模拟[J].中国矿业大学学报,2007,36(3):277-282.
[7]何磊,杨胜强,孙祺,等.Y型通风下采空区瓦斯运移规律及治理研究[J].中国安全生产科学技术,2011,2(2):50-54.
[8]高建良,刘明信,徐文.高抽巷抽采对采空区漏风规律的影响研究[J].河南理工大学学报(自然科学版),2015,34(2):141-145.
[9]王付清,王立伟.U型与J型通风采空区流场数值模拟研究[J].山西焦煤科技,2014,4(4):42-45.
[10]杨明,张帆.煤层倾角对采空区流场及瓦斯分布的影响研究[J].中国安全生产科学技术,2014,11(11):34-40.
[11]陶占宇.留巷段漏风对采空区瓦斯运移规律影响的数值模拟研究[J].煤炭工程,2014,46(11):102-105.