保德煤矿81305综放工作面煤的自燃特性及防治技术研究
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摘要
为了解和掌握保德煤矿8号煤层自然发火规律,以81305综放工作面为研究对象,进行煤样升温氧化实验,得出8号煤层自燃指标性气体为CO、C_2H_4。通过现场实测采空区气体变化规律结合数值模拟,得出81305工作面采空区自燃氧化带的范围为:进风侧200～350 m;工作面中部220～400 m;回风侧100～220 m。计算出预防采空区自燃的工作面最安全的推进速度为61.71 m/月。并提出了保德煤矿8号煤层不同开采时期采空区自然发火防治措施。
In order to understand and grasp the spontaneous combustion law of No.8 coal seam in Baode Coal Mine,taking 81305 fully mechanized top coal caving face as the research object,the temperature-rising oxidation experiment of coal samples was carried out,and it was concluded that CO and C_2H_4 were the index gases of spontaneous combustion in No.8 coal seam.Through on-site measurement and numerical simulation,the range of spontaneous combustion oxidation zone in goaf of 81305 working face were obtained as follows:intake side 200～350 m;central part 220～400 m;return side 100～220 m.The most safe advancing speed of the working face to prevent spontaneous combustion in goaf was calculated to be 61.71 m/month.The prevention and control measures of spontaneous combustion in goaf of No.8 coal seam in Baode Coal Mine in different mining periods were put forward.
In order to understand and grasp the spontaneous combustion law of No.8 coal seam in Baode Coal Mine,taking 81305 fully mechanized top coal caving face as the research object,the temperature-rising oxidation experiment of coal samples was carried out,and it was concluded that CO and C_2H_4 were the index gases of spontaneous combustion in No.8 coal seam.Through on-site measurement and numerical simulation,the range of spontaneous combustion oxidation zone in goaf of 81305 working face were obtained as follows:intake side 200～350 m;central part 220～400 m;return side 100～220 m.The most safe advancing speed of the working face to prevent spontaneous combustion in goaf was calculated to be 61.71 m/month.The prevention and control measures of spontaneous combustion in goaf of No.8 coal seam in Baode Coal Mine in different mining periods were put forward.
引文
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[4] 周亮,戴广龙,秦汝祥.高瓦斯易自燃煤层采空区遗煤自燃影响因素研究[J].中国安全科学学报,2018,28(2):122-127.Zhou Liang,Dai Guanglong,Qin Ruxiang.Research on factors influencing spontaneous combustion of coal in goaf in gassy coal seam having propensity to spontaneous combustion[J].China Safety Science Journal,2018,28(2):122-127.
[5] 关万里.神东矿区采空区遗煤自然发火规律研究[J].煤炭科学技术,2015,43(S2):71-75.Guan Wanli,Research on residual coal spontaneous combustion law for mine goaf in Shendong Mining Field[J].Coal Science and Technology,2015,42(S2):71-75.
[6] 张春,题正义,李宗翔,等.综放采空区遗煤厚度的分布规律及模拟研究[J].安全与环境学报,2012,12(6):203-207.Zhang Chun,Ti Zhenyi,Li Zongxiang,et al.Simulation study on the thickness of residual coal of goaf via the fully-mechanized caving mining and the coal distribution regularity[J].Journal of Safety and Environment,2012,12(6):203-207.
[7] 张立国.高瓦斯矿井极近距离煤层开采复合采空区自然发火综合防治技术[J].煤矿安全,2017,48(9):145-148.Zhang Liguo.Comprehensive prevention and control technology for spontaneous combustion of compound goaf in extremely close distance coal seams mining with high gas[J].Safety in Coal Mines,2017,48(9):145-148.
[8] 黄金,李俊孟,郝德永,等.综放工作面立体瓦斯抽采系统下采空区漏风规律研究[J].煤炭技术,2015,34(12):153-155.Huang Jin,Li Junmeng,Hao Deyong,et al.Study on gob air leakage law under gas extraction system of fully mechanized caving Face[J].Coal Technology,2015,34(12):153-155.
[9] 朱海鱼,武振国,宋宜猛,等.瓦斯抽放条件下采空区漏风供氧规律与煤自燃防治技术[J].中国煤炭,2013,39(11):103-107.Zhu Haiyu,Wu Zhenguo,Song Yimeng,et al.Air leakage and oxygen supply law in goaf during gas drainage and prevention and control technology of coal spontaneous combustion[J].China Coal,2013,39(11):103-107.