风量影响下的煤自燃定量预测预报指标试验研究  

Experimental study on quantitative prediction indexes of coal spontaneous combustion based on air supply

作　　者：王凯 韩涛[1,2] 和运中 WANG Kai;HAN Tao;HE Yunzhong(College of Safety Science and Engineering,Xi’an University of Science and Technology,Xi’an 710054,China;Shaanxi Key Laboratory of Prevention and Control of Coal Fire,Xi’an University of Science and Technology,Xi’an 710054,China)

机构地区：[1]西安科技大学安全科学与工程学院,陕西西安710054 [2]西安科技大学陕西省煤火灾害防治重点实验室,陕西西安710054

出　　处：《西安科技大学学报》2022年第1期16-21,共6页Journal of Xi’an University of Science and Technology

基　　金：陕西省教育厅青年创新团队建设科研计划项目(21JP070);国家自然科学基金项目(51704226,51674191);国家重点研发计划(2018YFC0807900);陕西省自然科学基础研究计划资助项目(2017JQ5047)。

摘　　要：为研究供风量对煤自燃指标气体的影响,建立煤自燃定量预测预报指标体系,以潞宁矿区气肥煤为研究对象,利用煤自燃程序升温实验方法,测试了5种供风量下实验煤样在升温过程中的气体产生规律。结果表明:供风量对煤氧化过程CO气体的影响表现出促进和抑制两方面作用,低风量下煤体散热量少但供氧不充分,高风量下煤体供氧充分但蓄热性差,综合表现煤自燃危险性由高到低排序为120,100,80,140,160 mL/min;从供风量对煤自燃气体产生影响与指标值区间单调性角度,定量确定了潞宁矿区气肥煤自燃不同阶段的预测预报指标值,即低温阶段(90℃以下)以CO/CO_(2)值为指标,区间判定指标值为(0.03,0.3),90℃时以C_(2)H_(4)出现为指标,高温阶段(90~170℃)以C_(2)H_(6)/C_(2)H_(4)值为指标,区间判定指标值为(100,1000);研究结果为煤矿井下不同供风量下煤自燃程度的准确预测预报提供了参考。In order to study the influence of air supply on index gas and a quantitative prediction index system of coal spontaneous combustion,a gas fertilized coal in Luning mining area was selected,and gas production rules of coal oxidation under five kinds of air supply were tested by using programmed heating experiment.The results showed that the influence of air supply on CO gas release in coal oxidation process was both promoted and inhibited.Under low air flow,it’s good to store heat but supply oxygen insufficiently,and under high air flow,it’s sufficient to supply oxygen but store heat poorly.In this paper,coal spontaneous combustility was ranked from high to low order of 120 mL/min,100 mL/min,80 mL/min,140 mL/min,160 mL/min.From the perspective of influence of air supply and monotonicity of index value interval,the index system for prediction and prediction of spontaneous combustion of gas fertilizer coal in luning mining area is quantitatively determined,that is,CO/CO_(2) is taken as the index below 90℃,which is(0.03,0.3);C_(2)H_(4) is taken as the index at 90℃,and C_(2)H_(6)/C_(2)H_(4) is taken as the index from 90℃ to 170℃,which is(100,1000).The results provide a reference for the accurate prediction of coal spontaneous combustion under different air supply in underground coal mine.

关 键 词：煤自然发火 漏风强度 指标气体 程序升温 供氧 

分 类 号：TD752[矿业工程—矿井通风与安全]