采空区上隅角埋管抽放瓦斯引流装置研究
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摘要
结合现场实际情况,运用Fluent软件进行数值模拟研究的方法,研究采空区埋管抽放的引流装置,解决上隅角瓦斯积聚过快导致瓦斯浓度超限问题。结果表明,在埋管抽放的基础上加入引流装置能够减小上隅角涡旋状态气流,使上隅角瓦斯随风流进入回风巷,进而降低上隅角瓦斯浓度。通过对上隅角瓦斯浓度的监测,设计出埋管长度4 m,埋管管径准0.239 m,引流装置长度0.5 m,开口角度60°的引流装置,并配套使用抽放泵,抽放负压控制为21～27 kPa,上隅角瓦斯浓度降低近20%。
Combined with the actual situation in the field, using Fluent software is carried out to study the drainage device of burying pipe in goaf to solve the problem of over-limit of gas concentration caused by excessive accumulation of gas in the upper corner. The results show that adding the drainage device on the basis of the buried pipe drainage can reduce the vortex flow in the upper corner and make the upper corner gas flow into the return air passage with the wind flow and then reduce the gas concentration in the upper corner. Through the upper corner gas concentration monitoring, the design of a drainage pipe length of 4 m, pipe diameter of 0.239 m, drainage device length of 0.5 m, opening angle of 60° drainage device, and supporting the use of drainage pump, pumping negative pressure control is 21 kPa to 27 kPa, the upper corner gas concentration reduce by nearly 20%.
Combined with the actual situation in the field, using Fluent software is carried out to study the drainage device of burying pipe in goaf to solve the problem of over-limit of gas concentration caused by excessive accumulation of gas in the upper corner. The results show that adding the drainage device on the basis of the buried pipe drainage can reduce the vortex flow in the upper corner and make the upper corner gas flow into the return air passage with the wind flow and then reduce the gas concentration in the upper corner. Through the upper corner gas concentration monitoring, the design of a drainage pipe length of 4 m, pipe diameter of 0.239 m, drainage device length of 0.5 m, opening angle of 60° drainage device, and supporting the use of drainage pump, pumping negative pressure control is 21 kPa to 27 kPa, the upper corner gas concentration reduce by nearly 20%.
引文
[1]朱超,史志斌.煤炭绿色智能开发利用战略选择[J].煤炭经济研究,2017,37(2):6-16.
[2]林柏泉,张建国,翟成,等.近距离保护层开采采场下行通风瓦斯涌出及分布规律[J].中国矿业大学学报,2008(1):24-29.
[3]魏春荣,李艳霞,孙建华,等.灰色-分源预测法对煤矿瓦斯涌出量的应用研究[J].采矿与安全工程学报,2013,30(4):628-632.
[4]王凯,蒋曙光,马小平,等.引流器与尾巷治理上隅角瓦斯的数值模拟及应用实践[J].采矿与安全工程学报,2015,32(5):864-870.
[5]李宗翔,海国治,秦书玉.采空区风流移动规律的数值模拟与可视化显示[J].煤炭学报,2001(1):76-80.
[6]崔凯,张东海,杨胜强.采空区遗煤自燃带确定及风流场数值模拟[J].山东科技大学学报:自然科学版,2002(4):88-92.
[7]李宗翔.高瓦斯易自燃采空区瓦斯与自燃耦合研究[D].阜新:辽宁工程技术大学,2007.
[8]张国枢,戴广龙,王卫平.煤炭自燃模拟实验装置设计与研制[J].淮南工业学院学报,1999(4):11-13.
[9]贾宝财,刘振宇. U型通风方式采煤工作面上隅角瓦斯处理方法[J].煤炭技术,2008(5):88-89.
[2]林柏泉,张建国,翟成,等.近距离保护层开采采场下行通风瓦斯涌出及分布规律[J].中国矿业大学学报,2008(1):24-29.
[3]魏春荣,李艳霞,孙建华,等.灰色-分源预测法对煤矿瓦斯涌出量的应用研究[J].采矿与安全工程学报,2013,30(4):628-632.
[4]王凯,蒋曙光,马小平,等.引流器与尾巷治理上隅角瓦斯的数值模拟及应用实践[J].采矿与安全工程学报,2015,32(5):864-870.
[5]李宗翔,海国治,秦书玉.采空区风流移动规律的数值模拟与可视化显示[J].煤炭学报,2001(1):76-80.
[6]崔凯,张东海,杨胜强.采空区遗煤自燃带确定及风流场数值模拟[J].山东科技大学学报:自然科学版,2002(4):88-92.
[7]李宗翔.高瓦斯易自燃采空区瓦斯与自燃耦合研究[D].阜新:辽宁工程技术大学,2007.
[8]张国枢,戴广龙,王卫平.煤炭自燃模拟实验装置设计与研制[J].淮南工业学院学报,1999(4):11-13.
[9]贾宝财,刘振宇. U型通风方式采煤工作面上隅角瓦斯处理方法[J].煤炭技术,2008(5):88-89.