典型易燃厚煤层综采工作面CO来源主控因素实验研究  

Experimental Study on Main Controlling Factors of CO Sources in Fully Mechanized Mining Faces of Typical Flammable Thick Coal Seams

作　　者：吕英华 周春山 安世岗 LYU Yinghua;ZHOU Chunshan;AN Shigang(Shendong Coal Group,National Energy Group,Shenmu 719315,China;College of Safety and Emergency Management Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]国家能源集团神东煤炭集团,陕西神木719315 [2]太原理工大学安全与应急管理工程学院,太原030024

出　　处：《山西煤炭》2022年第3期74-79,共6页Shanxi Coal

基　　金：山西省自然科学基金项目(20210302124062);山西省留学人员科技活动择优资助项目(20220010)。

摘　　要：针对神东矿区典型易燃厚煤层综采工作面正常作业过程中,回风隅角频繁出现CO超限的现象,利用煤层破碎产生CO,结合常温氧化实验和污染物排放现场观测,采集5种煤样并监测3个工作面对回风隅角CO来源的影响,同时对主控因素进行了分析研究。结果表明:1^(#)-5^(#)煤样经10~100 min破碎最高产生CO的体积分数为8.9×10^(-4)%~14.9×10^(-4)%,产率与破碎时间及煤样质量呈正相关,与含水率呈负相关;外加10~60 mL水可以迅速降低约55.2%~60.7%的CO体积分数。实测3个工作面的CO体积分数在生产期间高于检修期间约8×10^(-4)%~19×10^(-4)%。在温度为25~100℃时,煤样常温氧化产生CO的体积分数为134.7×10^(-4)%~271.2×10^(-4)%,其中,当温度低于90℃时,低通风速率更有利于CO的产生。密集车辆时间段胶轮车尾气造成工作面CO的体积分数瞬时增加约7×10^(-4)%~11×10^(-4)%。During the normal operation of the fully mechanized mining face of a typical flammable thick coal seam in Shendong Mine,CO overrun frequently occurs at the corner of return airway.For this issue,using CO generated from crushing of the coal seam,five coal samples were collected and the impact of three working faces on the CO sources was monitored in combination with the oxidation experiment at ambient temperature and the field observation of pollutant emissions.The main controlling factors were also studied.The results show that the highest CO volume fraction of the five coal samples ranges from 8.9×10^(-4)%to 14.9×10^(-4)%after 10 to 100 minute crushing,and the yield was positively correlated with the crushing time and coal sample quality,and was negatively correlated with the water content.In addition,adding 10 to 60 mL water can rapidly reduce the CO volume fraction by 55.2%to 60.7%.The measured CO volume fraction of the three working faces during production was higher than that during maintenance by approximately 8×10^(-4)%to 19×10^(-4)%.The CO volume fraction produced by room temperature oxidation ranged from 134.7×10^(-4)%to 271.2×10^(-4)%at temperatures between 25℃and 100℃.Among them,the low ventilation rate is more conducive to CO generation when the temperature is below 90℃.The CO volume fraction at the working face increased instantaneously by about 7×10^(-4)%to 11×10^(-4)%due to rubber-wheeled vehicles’exhaust gas during the intensive vehicle time period.

关 键 词：CO 机械破碎 常温氧化 污染物排放 

分 类 号：TD712[矿业工程—矿井通风与安全]