煤与油页岩共采条件下自然发火标志气体及预报指标体系研究
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摘要
针对梁家矿煤与油页岩共采条件下采空区自然发火情况下的标志性气体优选的问题,选取1105工作面样品运用程序升温实验进行了煤与油页岩自然发火气体产物模拟试验,分析了CO、烯烃、烷烃及其比值的产生规律,进行了煤与油页岩自燃预测预报体系研究。结果表明:CO出现的临界值温度在40℃左右,标志着煤与油页岩已经开始产生反应;C_2H_4出现在120℃左右,标志着煤与油页岩进入加速氧化阶段;C_2H_4/C_2H_6、C_2H_4/C_3H_8可以作为预测煤与油页岩自然发火进程的辅助标志气体。同时,根据CO、C_2H_4等气体释放量,确定了梁家矿煤与油页岩自然发火标志气体判别参数。
In view of the problem of the index gas preference in the spontaneous combustion of the goaf under the conditions of coal and oil shale mining in Liangjia Coal Mine, the sample from 1105 working face was selected to simulate the natural gas content of coal and oil shale using a temperature programing experiment. The generation laws of CO, olefins, alkanes and their ratios were analyzed, and the forecasting technology of coal and oil shale spontaneous combustion was studied. The results show that the critical temperature of CO is around 40 ℃, and this marked the beginning of a reaction of coal and oil shale; C_2H_4 appears at about 120 ℃, indicating that the coal and oil shale had entered the stage of accelerated oxidation; C_2H_4/C_2H_6, C_2H_4/C_3H_8 can be used as the auxiliary gases for predicting the spontaneous combustion of coal and oil shale. At the same time, according to the gas release amount of CO, C_2H_4, etc, the identification parameters for the spontaneous combustion of coal and oil shale in Liangjia Coal Mine were determined.
In view of the problem of the index gas preference in the spontaneous combustion of the goaf under the conditions of coal and oil shale mining in Liangjia Coal Mine, the sample from 1105 working face was selected to simulate the natural gas content of coal and oil shale using a temperature programing experiment. The generation laws of CO, olefins, alkanes and their ratios were analyzed, and the forecasting technology of coal and oil shale spontaneous combustion was studied. The results show that the critical temperature of CO is around 40 ℃, and this marked the beginning of a reaction of coal and oil shale; C_2H_4 appears at about 120 ℃, indicating that the coal and oil shale had entered the stage of accelerated oxidation; C_2H_4/C_2H_6, C_2H_4/C_3H_8 can be used as the auxiliary gases for predicting the spontaneous combustion of coal and oil shale. At the same time, according to the gas release amount of CO, C_2H_4, etc, the identification parameters for the spontaneous combustion of coal and oil shale in Liangjia Coal Mine were determined.
引文
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[3]王东东,李增学,吕大炜,等.陆相断陷盆地煤与油页岩共生组合及其层序地层特征[J].地球科学,2016,41(3):508-522.
[4]MIAO Z Y,WU G G,LI P,et al.Investigation into copyrolysis characteristics of oil shale and coal[J].International Journal of Mining Science and Technology,2012(22):245-249.
[5]WANG G,WANG Y,SUN L,et al.Study on the LowTemperature Oxidation Law in the Co-Mining Face of Coal and Oil Shale in a Goaf-A Case Study in the Liangjia Coal Mine,China[J].Energies,2018,11(1):174.
[6]许延辉,许满贵,徐精彩.煤自燃火灾指标气体预测预报的几个关键问题探讨[J].矿业安全与环保,2005(1):16-18.
[7]李红选,张进军,王福军,等.基于大佛寺矿的煤自燃多参数指标气体实验研究[J].煤炭技术,2016(5):196-197.
[8]李林,陈军朝,姜德义,等.煤自燃全过程高温区域及指标气体时空变化实验研究[J].煤炭学报,2016(2):444-450.
[9]刘乔,王德明,仲晓星,等.基于程序升温的煤层自然发火指标气体测试[J].辽宁工程技术大学学报(自然科学版),2013,32(3):362-366.
[10]邓军,赵婧昱,张嬿妮,等.不同变质程度煤二次氧化自燃的微观特性试验[J].煤炭学报,2016(5):1164.
[11]秦红星,戴广龙,张树川,等.基于煤低温氧化试验下的标志气体优选及应用[J].煤炭科学技术,2015,43(6):65-70.
[12]王文才,张培,任春雨,等.煤田露头火区标志性气体确定的试验研究及应用[J].煤炭科学技术,2016,44(3):55-59.
[13]王刚,程卫民,周刚.综放工作面采空区自燃“三带”分布规律的研究[J].矿业安全与环保,2010,37(1):18-21.
[14]徐俊.中梁山南矿井煤自燃标志气体及指标体系研究[J].煤炭科学技术,2011,39(9):34-36.
[15]王擎,孙斌,刘洪鹏,等.油页岩热解过程矿物质行为分析[J].燃料化学学报,2013,41(2):163-168.
[16]寇砾文,蒋曙光,王兰云,等.煤自燃指标气体产生规律及影响因素分析[J].矿业研究与开发,2012,32(2):67-70.
[17]刘艳红,姚建.煤样标志性气体选择的实验研究[J].煤矿开采,2009,14(4):93-95.
[18]彭伟,何启林,葛新玉.煤炭自燃标志性气体确定的实验研究[J].中国安全生产科学技术,2010,6(6):140-144.