柴家沟矿4-2煤层自燃标志气体优选实验研究
Experimental Study on Optimization Selection of Coal Spontaneous Combustion Index Gases in 4-2 Coal Seam of Chaijiagou Mine
-
摘要: 为提高柴家沟矿4-2煤层自燃预测预报准确性,采用XK-Ⅶ大型煤自燃实验台模拟4-2煤层自然发火过程,对自燃特性参数、单一标志气体、复合标志气体进行分析。实验证明:当煤温在70~80 ℃时,煤样耗氧速率明显加快,放热强度曲线斜率逐渐增大,当煤温在100~120 ℃时,耗氧速率迅猛增加,放热强度曲线斜率明显增大,故推断4-2煤层自燃临界温度在68~80 ℃,干裂温度在100~120 ℃;由于φ(CO)、φ(O2)/φ(CO+CO2)随煤温变化的灵敏性和规律性强,且在井下容易检测,故将φ(CO)、φ(O2)/φ(CO+CO2)选作预测4-2煤层自燃的主要标志气体参数;由于φ(C2H4)、φ(CH4)/φ(C2H6)、φ(C2H4)/φ(C2H6)能从一定程度上反映4-2煤层自燃发展阶段,故将φ(C2H4)、φ(CH4)/φ(C2H6)、φ(C2H4)/φ(C2H6)选作预测4-2煤层自燃高温阶段的辅助标志气体参数。Abstract: In order to improve the predicting and forecasting accuracy of spontaneous combustion of 4-2 coal seam in Chaijiagou Mine, this experiment simulates the spontaneous combustion process of 4-2 coal seam with XK -Ⅶ large-scale coal spontaneous combustion test bench. The spontaneous combustion characteristic parameters, single index gas and compound index gas have been analyzed. The results of the experiment show that when coal temperature is 70 ℃ to 80 ℃, the oxygen consumption rate of sample coal accelerates obviously and the slope of exothermic intensity curve gradually increases; when coal temperature is 100 ℃ to 120 ℃, the oxygen consumption rate of sample coal increases intensely and the slope of exothermic intensity curve increases obviously. In such case, it’s assumed that the critical temperature of spontaneous combustion of 4-2 coal seam is 68 ℃ to 80 ℃ and the dry cracking temperature is 100 ℃ to 120 ℃. Because φ(CO), φ(O2)/φ(CO+CO2) varied with coal temperature with great flexibility and regularity and they are easy to be detected under the mine,φ(CO), φ(O2)/φ(CO+CO2) are selected as the primary index gases to predict the spontaneous combustion of 4-2 coal seam; because φ(CH4)/φ(C2H6), φ(C2H4)/φ(C2H6) can reflect the development stage of spontaneous combustion of 4-2 coal seam to some extent, φ(C2H4), φ(CH4)/φ(C2H6), φ(C2H4)/φ(C2H6) are selected as the auxiliary index gases to predict the spontaneous combustion of 4-2 coal seam.
-
-
[1] 刘小杰.矿井火灾发生原因与防治技术[J].煤炭技术,2009,28(2):83-86. [2] 邓军,李贝,李珍宝,等.预报煤自燃的气体指标优选试验研究[J].煤炭科学技术,2014,42(1):55-59. [3] 何萍,王飞宇,唐修义,等.煤氧化过程中气体的形成特征与煤自燃指标气体选择[J].煤炭学报,1994(6):635-643. [4] 朱红青,王海燕,王斐然,等.煤堆测温技术研究进展[J].煤炭科学技术,2014,42(1):50-54. [5] 张国枢,吴中立,邵辉,等.煤炭自燃指标气体实验化选与应用[J].淮南矿业学院学报,1995(1):42-450. [6] 王志扬.煤自燃单一指标气体浓度与煤温对应关系的实验研究[J].水力采煤与管道运输,2013(2):31-33. [7] 武福生.预测煤自燃的复合气体指标优选实验研究[J].工矿自动化,2018,44(7):61-65. [8] P Lu, G X Liao, J H Sun, et al. Experimental research onindex gas of the coal spontaneous at low-temperature stage[J]. Journal of Loss Prevention in the Process Industries, 2004, 17(3): 243-247. [9] 邓军,徐精彩,张迎弟,等.煤最短自然发火期实验及数值分析[J].煤炭学报,1999(3):52-56. [10] 谢振华,金龙哲,宋存义.程序升温条件下煤炭自燃特性[J].北京科技大学学报,2003(1):12-14. [11] 邓凯,袁树杰.综采工作面采空区煤炭自燃“三带”的划分及实测[J].煤矿安全,2012,43(5):141-142. [12] 徐精彩,薛韩玲,文虎,等.煤氧复合热效应的影响因素分析[J].中国安全科学学报,2001(2):34-39. [13] 徐精彩.自燃危险区域判定理论[M].北京:煤炭工业出版社,2001. [14] 王继仁,邓汉忠,邓存宝,等.煤自燃生成一氧化碳和水的反应机理研究[J].计算机与应用化学,2008(8):935-940. [15] 王继仁,陈启文,邓存宝,等.煤自燃生成甲烷的反应机理[J].煤炭学报,2009,34(12):1660-1664. [16] 邓存宝,王继仁,张俭,等.煤自燃生成乙烯反应机理[J].煤炭学报,2008(3):299-303. [17] 肖旸,王振平,马砺,等.煤自燃指标气体与特征温度的对应关系研究[J].煤炭科学技术,2008(6):47. [18] Deng Jun, Zhao Jingyu, Zhang Yanni, et al. Study on Coal Spontaneous Combustion Characteristic Temperature of Growth Rate Analysis[J]. Procedia Engineering, 2014, 84: 796-804. [19] 代广龙.浅析煤炭自燃指标气体的优选与使用[J].煤炭科学技术,1996(9):44-47. [20] 安帮,王俊峰,王涌宇,等.煤自燃复合指标气体生成规律实验研究[J].煤矿安全,2018,49(2):23-26.
计量
- 文章访问数: 78
- HTML全文浏览量: 0
- PDF下载量: 0
下载:
